This prospectus relates to the issuance by us of up to an aggregate of 14,519,218 shares of our Class A common stock, $0.0001 par value per share (“Class A Common Stock”), which consists of (i) up to 7,719,779 shares of Class A Common Stock that are issuable upon the exercise of 7,719,779 warrants (the “Private Placement Warrants”) originally purchased by the Sponsor (as defined below) at a price of $1.00 per warrant in a private placement in connection with the initial public offering of our predecessor company, Yellowstone Acquisition Company (“YAC”) and (ii) up to 6,799,439 shares of Class A Common Stock that are issuable upon the exercise of 6,799,439 warrants (the “Public Warrants” and, together with the Private Placement Warrants, the “Warrants”) originally issued in the initial public offering of YAC. We will receive the proceeds from any exercise of any Public Warrants for cash.

This prospectus also relates to the offer and sale from time to time by the selling securityholder named in this prospectus (the “Selling Securityholder”) of (i) up to 7,719,779 shares of Class A Common Stock that are issuable upon the exercise of 7,719,779 Private Placement Warrants and (ii) up to 7,719,779 Private Placement Warrants. We will not receive any proceeds from the sale of Private Placement Warrants by the Selling Securityholder pursuant to this prospectus. The holder of Private Placement Warrants has agreed, subject to certain exceptions, not to sell the Private Placement Warrants, or the shares of Class A Common Stock underlying the Private Placement Warrants, for a period of at least the first to occur of (a) January 25, 2023 and (b) if the last sale price of our Class A Common Stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing on or after June 24, 2022.

We are registering the securities for resale pursuant to the Selling Securityholder’s registration rights under certain agreements between us and the Selling Securityholder. Our registration of the securities covered by this prospectus does not mean that the Selling Securityholder will offer or sell any of the Private Placement Warrants. The Selling Securityholder may offer, sell or distribute all or a portion of its Private Placement Warrants publicly or through private transactions at prevailing market prices or at negotiated prices. We will not receive any proceeds from the sale of shares of Private Placement Warrants by the Selling Securityholder pursuant to this prospectus, except with respect to amounts received by us upon exercise of the Warrants to the extent such Warrants are exercised for cash. We provide more information about how the Selling Securityholder may sell the Private Placement Warrants in the section entitled “Plan of Distribution.”

We are an “emerging growth company” as defined in Section 2(a) of the Securities Act of 1933, as amended, and are subject to reduced public company reporting requirements. This prospectus complies with the requirements that apply to an issuer that is an emerging growth company.

Our Class A Common Stock and Public Warrants are listed on the New York Stock Exchange American LLC (the “NYSE American”) under the symbols “SKYH” and “SKYH WS,” respectively. On April 27, 2022, the closing price of our Class A Common Stock was $9.10 and the closing price for our Public Warrants was $0.69.

As of the date of this prospectus, our Warrants are “out of the money,” which means that the trading price of the shares of Class A Common Stock underlying the Warrants is below the $11.50 exercise price of the Warrants. For so long as the Warrants remain “out of the money,” we do not expect warrantholders to exercise their warrants and, therefore, we do not expect to receive cash proceeds from any such exercise. Accordingly, the exercises of the Warrants are dependent on the market price of our Class A Common Stock. To the extent that the market prices of the Warrants and Class A Common Stock exceed $1.00 and $11.50, respectively, the Selling Securityholder may sell its Warrants or exercise its Warrants and sell the underlying Class A Common Stock, which may have negative impact on the market prices of the Warrants and Class A Common Stock. See “Risk Factors—There is no guarantee that the Warrants will be in the money, and they may expire worthless and the terms of our Warrants may be amended” for more information.

The shares of Class A Common Stock underlying the Public Warrants and Private Placement Warrants that are being registered for issuance and resale under this prospectus represent approximately 49% of the total shares of Class A Common Stock outstanding as of April 28, 2022 (assuming that all Public Warrants and Private Placement Warrants are exercised). The Selling Securityholder, upon the exercise of the Private Placement Warrants, will beneficially own over 93% of the outstanding shares of Class A Common Stock (assuming that no Public Warrants are exercised) and will be able to sell all of its shares upon the expiration of the applicable lock-up restrictions. Following the expiration of the applicable lock-up restrictions described herein, the sale of all the shares of Class A Common Stock issuable upon exercise of the Warrants, or the perception that such sales may occur, may cause the market prices of our securities to decline significantly.

See the section entitled “Risk Factors” beginning on page 7 of this prospectus and in other documents that are incorporated by reference in this prospectus to read about factors you should consider before buying our securities.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

You should rely only on the information provided in this prospectus, as well as the information incorporated by reference into this prospectus and any applicable prospectus supplement. Neither we nor the Selling Securityholder have authorized anyone to provide you with different information. Neither we nor the Selling Securityholder are making an offer of these securities in any jurisdiction where the offer is not permitted. You should not assume that the information in this prospectus or any applicable prospectus supplement is accurate as of any date other than the date of the applicable document. Since the date of this prospectus and the documents incorporated by reference into this prospectus, our business, financial condition, results of operations and prospects may have changed.

This prospectus is part of a registration statement on Form S-1 that we filed with the Securities and Exchange Commission (the “SEC”) using the “shelf” registration process. Under this shelf registration process, the Selling Securityholder may, from time to time, sell the securities offered by it described in this prospectus. We will not receive any proceeds from the sale by such Selling Securityholder of the securities offered by it described in this prospectus. This prospectus also relates to the issuance by us of the shares of Class A Common Stock issuable upon the exercise of any Warrants. We will not receive any proceeds from the sale of shares of Class A Common Stock underlying the Warrants pursuant to this prospectus, except with respect to amounts received by us upon the exercise of the Public Warrants for cash.

Neither we nor the Selling Securityholder have authorized anyone to provide you with any information or to make any representations other than those contained in this prospectus or any applicable prospectus supplement or any free writing prospectuses prepared by or on behalf of us or to which we have referred you. Neither we nor the Selling Securityholder take responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. Neither we nor the Selling Securityholder will make an offer to sell these securities in any jurisdiction where the offer or sale of such securities is not permitted.

We may also provide a prospectus supplement or post-effective amendment to the registration statement to add information to, or update or change information contained in, this prospectus. You should read both this prospectus and any applicable prospectus supplement or post-effective amendment to the registration statement together with the additional information to which we refer you in the sections of this prospectus entitled “Where You Can Find More Information.”

On January 25, 2022 (the “Closing Date”), we consummated the previously announced business combination pursuant to that certain Equity Purchase Agreement, dated as of August 1, 2021 (the “Equity Purchase Agreement”), by and among YAC and Sky Harbour LLC, a Delaware limited liability company (“Sky”). On the Closing Date the following occurred: (a) YAC changed its name to “Sky Harbour Group Corporation”; (b) all outstanding shares of Class B Common Stock, held by BOC Yellowstone LLC, a Delaware limited liability company (the “Sponsor”), were converted into shares of Class A Common Stock; (c) Sky restructured its capitalization, issued to the Company 14,937,581 common units of Sky (the “Sky Common Units”), which was equal to the number of outstanding shares of Class A Common Stock immediately after giving effect to the business combination (taking into account the redemption of Class A Common Stock and the Class A Common Stock issued under the BOC PIPE (as defined below)), reclassified the existing Sky Common Units (other than the existing Sky incentive common units (the “Sky Incentive Units”)), existing Sky Series A preferred units and the existing Sky Series B preferred units into Sky Common Units; (d) effected certain adjustments to the number of Sky Incentive Units to reflect the new capital structure; (e) appointed the Company as the managing member of Sky; (f) the Sky Common Units issued to BOC YAC Funding LLC (“BOC YAC”) in respect of its Series B preferred units were converted into 5,500,000 shares of Class A Common Stock; (h) holders of Sky Common Units received one share of Class B Common Stock for each Sky Common Unit, and as consideration for the issuance of 14,937,581 Sky Common Units by Sky to the Company, YAC contributed to Sky $46,262,048 consisting of the amount held in the YAC trust account after (i) deducting $123,068,515 required to fund the redemption of the Class A Common Stock held by eligible stockholders who properly elected to have their shares redeemed as of the Closing Date, (ii) taking into account the $45,000,000 purchase by Boston Omaha Corporation (“Boston Omaha”) of Class A Common Stock (the “BOC PIPE”) and (iii) deducting $21,164,160 consisting of deferred underwriting commissions, transaction expenses and the BOC Yellowstone LLC promissory note repayment; and (i) without any action on the part of any holder of YAC Warrants, each YAC Warrant that was issued and outstanding immediately prior to the closing became a Warrant (the transactions referred to in clauses (a) through (i), collectively, the “Business Combination”).

As a result of the closing of the Business Combination (the “Closing”), the Company is organized as an “Up-C” structure in which substantially all of the operating assets of Sky’s business are held by Sky, and the Company’s only assets are its equity interests in Sky.

Unless the context indicates otherwise, references in this prospectus to the terms the “Company,” “SHG Corporation,” “Registrant,” “we,” “us” and “our” refer to the entity formerly named Yellowstone Acquisition Company, after giving effect to the Business Combination, and as renamed Sky Harbour Group Corporation. The terms “Yellowstone” and “YAC” are to our company prior to the prior to the completion of the Business Combination.

This prospectus contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). These forward-looking statements can be identified by the use of forward-looking terminology, including the words “believes,” “estimates,” “anticipates,” “expects,” “intends,” “plans,” “may,” “might,” “will,” “potential,” “projects,” “predicts,” “continue,” or “should,” or, in each case, their negative or other variations or comparable terminology. There can be no assurance that actual results will not materially differ from expectations. These statements are based on management’s current expectations, but actual results may differ materially due to various factors, including, but not limited to:

The forward-looking statements contained in this prospectus are based on our current expectations and beliefs concerning future developments and their potential effects on us. Future developments affecting us may not be those that we have anticipated. These forward-looking statements involve a number of risks, uncertainties (some of which are beyond our control) and other assumptions that may cause actual results or performance to be materially different from those expressed or implied by these forward-looking statements. These risks and uncertainties include, but are not limited to, those factors described under the heading “Risk Factors.” Should one or more of these risks or uncertainties materialize, or should any of our assumptions prove incorrect, actual results may vary in material respects from those projected in these forward-looking statements. We undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws. These risks and others described under “Risk Factors” may not be exhaustive.

By their nature, forward-looking statements involve risks and uncertainties because they relate to events and depend on circumstances that may or may not occur in the future. We caution you that forward-looking statements are not guarantees of future performance and that our actual results of operations, financial condition and liquidity, and developments in the industry in which we operate may differ materially from those made in or suggested by the forward-looking statements contained in this prospectus. In addition, even if our results or operations, financial condition and liquidity, and developments in the industry in which we operate are consistent with the forward-looking statements contained in this prospectus, those results or developments may not be indicative of results or developments in subsequent periods.

An investment in shares of our Class A Common Stock and Warrants involves substantial risks. In addition to other information in this prospectus, you should carefully consider the risks described in this prospectus, as well as other information and data set forth in this prospectus, before making an investment decision with respect to our securities. The occurrence of any of such risks could materially and adversely affect our business, prospects, financial condition and results of operations, which could cause you to lose all or a part of your investment in our securities. Some statements in this prospectus and the documents incorporated by reference herein constitute forward looking statements. See “Cautionary Note Regarding Forward-Looking Statements.”

We will receive up to an aggregate of approximately $167 million from the exercise of the Warrants, assuming the exercise in full of all of the Warrants for cash. However, will only receive proceeds to the extent holders of Warrants elect to exercise. We can provide no assurances as to the amount of proceeds we will receive from the exercise of Warrants or whether we will receive any proceeds. We will have broad discretion in the use of any proceeds received from the exercise of Warrants. Delays in investing the net proceeds from this offering may impair our performance. We cannot assure you that we will be able to identify uses of proceeds that meet our investment objectives or that any investment that we make will produce a positive return. We may be unable to invest the net proceeds from this offering on acceptable terms within the time period that we anticipate or at all, which could harm our financial condition and operating results. Moreover, we will have significant flexibility in investing the net proceeds from this offering and may use the net proceeds from this offering in ways with which investors may not agree.

The shares of Class A Common Stock underlying the Public Warrants and Private Placement Warrants that are being registered for issuance and resale under this prospectus represent approximately 49% of the total shares of Class A Common Stock outstanding as of April 28, 2022 (assuming that all Public Warrants and Private Placement Warrants are exercised). The Selling Securityholder, upon the exercise of the Private Placement Warrants, will beneficially own over 93% of the outstanding shares of Class A Common Stock (assuming that no Public Warrants are exercised) and will be able to sell all of its shares upon the expiration of the applicable lock-up restrictions. The sale of all of these securities, including the shares of Class A Common Stock underlying the Public Warrants and Private Placement Warrants, in the public market, or the perception that holders of a large number of securities intend to sell their securities, could significantly reduce the market price of our Class A Common Stock and Public Warrants.

The Private Placement Warrants being registered for resale by the Selling Securityholder are subject to lock up, which will end on the earlier of (a) January 25, 2023 and (b) if the last sale price of our Class A Common Stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing on or after June 24, 2022. Once such resale restrictions end, the market price of our Class A Common Stock could decline if the Selling Securityholder of currently restricted shares sell them after exercising its Private Placement Warrants or are perceived by the market as intending to sell them.

In the future, we will be required to register on a separate registration statement, the resale of shares of Class A Common Stock converted from shares of Class B Common Stock, which are the founder shares currently held by the Sponsor and were purchased at a nominal price per share of $0.00735. As a result of such nominal price compared to the market prices, the Sponsor will likely earn a positive return on its investment even if the other holders of shares of Class A Common Stock, including our public stockholders, experience a negative return on their investment in our securities. Accordingly, the Sponsor may be incentivized to sell its securities when others are not when the separate registration statement becomes effective in the future.

The market prices and trading volume that our shares of Class A Common Stock have recently experienced, and may continue to experience, extreme volatility, which could cause purchasers of our Class A Common Stock and Public Warrants to incur substantial losses. Since the closing of the Business Combination, our Class A Common Stock has traded as low as $5.25 and as high as $43.41 as of April 28, 2022. In addition, the volume of trading of our Class A Common Stock has been inconsistent. For example, on February 16, 2022 our Class A Common Stock had trading volume of 13,800 shares and on February 18, 2022 our Class A Common Stock had trading volume of 19,692,800. Our Public Warrants have not traded in tandem with our Class A Common Stock, and since the closing of the Business Combination has traded within a range of $0.33 to $2.75 as of April 28, 2022.

We believe that the recent volatility and our current market prices reflect market and trading dynamics unrelated to our underlying business, or macro or industry fundamentals, and we do not know how long these dynamics will last. Under the circumstances, investors in our Class A Common Stock and Warrants are subject to the risk of losing all or a substantial portion of their investment.

Extreme fluctuations in the market price of our Common Stock have been accompanied by reports of strong and atypical retail investor interest, including on social media and online forums. The market volatility and trading patterns we have experienced create several risks for investors, including the following:

The trading price of Class A Common Stock and Public Warrants depends on many factors, including those described in this “Risk Factors” section, many of which are beyond our control and may not be related to our operating performance. Any of the factors listed below could have a material adverse effect on investment in Class A Common Stock and Public Warrants, and Class A Common Stock and Public Warrants may trade at prices significantly below the price paid for them. In such circumstances, the trading price of Class A Common Stock and Public Warrants may not recover and may experience a further decline. Factors affecting the trading price of Class A Common Stock and Public Warrants may include:

As of April 28, 2022, the public float of our Class A Common Stock listed in the NYSE American was approximately $36.4 million, which is only 2.7% of the equity capitalization of the Company. Given the company is recently listed, and does not have any investor research coverage nor a seasoned established institutional investor base, any significant sale of shares subject of this registration statement may have a significant negative impact on the price of our Class A Common Stock.

We cannot predict whether our dual class structure will result in a lower or more volatile market price of Class A Common Stock or in adverse publicity or other adverse consequences. For example, certain index providers have announced restrictions on including companies with multiple-class share structures in certain of their indexes. Under these policies, our dual class capital structure would make us ineligible for inclusion in certain indices, and as a result, mutual funds, exchange-traded funds and other investment vehicles that attempt to passively track those indices will not be investing in our stock. It is unclear what effect, if any, these policies will have on the valuations of publicly traded companies excluded from such indices, but it is possible that they may depress valuations, as compared to similar companies that are included. As a result, the market price of shares of Class A Common Stock could be adversely affected.

As of April 28, 2022, there were 6,799,439 outstanding Public Warrants to purchase 6,799,439 shares of Class A Common Stock at an exercise price of $11.50 per share, which warrants will become exercisable upon the earlier of the effectiveness of a resale registration statement registering the shares of Class A Common Stock underlying the Public Warrants and Private Placement Warrants and April 21, 2022. In addition, as of April 28, 2022, there were 7,719,779 Private Placement Warrants outstanding exercisable for 7,719,779 shares of Class A Common Stock at an exercise price of $11.50 per share. Beginning on April 21, 2022, the Public Warrants and Private Placement Warrants may be exercised on a cashless basis. We do not expect the warrantholders to exercise their warrants on a cashless basis, for so long as the “fair market value,” as described herein, is lower than the exercise price of $11.50. To the extent such warrants are exercised, additional shares of Class A Common Stock will be issued, which will result in dilution to the holders of Class A Common Stock and increase the number of shares eligible for resale in the public market.

In addition, as of April 28, 2022, we had 42,192,250 Sky common units outstanding, which upon expiration of the lock-up period may be redeemed for shares of our Class A common stock on a one-for-one basis. The lock-up period for the outstanding Sky common units, and for the shares of Class A Common Stock underlying the Private Placement Warrants, expires upon the earlier of (a) January 25, 2023 and (b) if the last sale price of our Class A Common Stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing on or after June 24, 2022. Furthermore, we are required to register for resale all of the Class A common stock underlying such outstanding units. Sales of substantial numbers of such shares in the public market, or the perception that such sales may occur, could adversely affect the market price of Class A Common Stock, the impact of which is increased as the value of our stock price increases.

The exercise price for the Warrants is $11.50 per share of Class A Common Stock, which exceeds the market price of the shares of Class A Common Stock, which was $9.10 per share based on the closing price of the Class A Common Stock on April 27, 2022. There is no guarantee that the Warrants will be in the money at any given time prior to their expiration. Pursuant to the terms of the warrant agreement, dated as of October 21, 2020, between Continental Stock Transfer & Trust Company, as Warrant Agent, and us (the “Warrant Agreement”), the Public Warrants will expire on January 25, 2027, at 5:00 p.m., New York City time, or earlier upon redemption or liquidation. If the trading price of Class A Common Stock declines, the Warrants may expire worthless. If all of the Warrants were exercised in full for cash, we would receive an aggregate of approximately $167 million. We do not expect the holders of the Warrants to exercise their Warrants and therefore, we do not expect to receive cash proceeds from any such exercise, for so long as the Warrants remain out of the money. The Warrants will become exercisable upon the earlier of the effectiveness of the registration statement of which this prospectus forms a part registering the shares of Class A Common Stock underlying the Public Warrants and Private Placement Warrants and April 21, 2022 (the 61st business day following the completion of the Business Combination). We intend to seek to go effective on the registration statement of which this prospectus forms a part as soon as possible, but we will not be able to go effective on the registration statement of which this prospectus forms a part prior to April 21, 2022. We can provide no assurances that the trading price of our Class A Common Stock will remain at levels where it would be attractive to exercise our outstanding Warrants until the time that such warrants become exercisable.

We have the ability to redeem outstanding Warrants at any time after they become exercisable and prior to their expiration, at a price of $0.01 per warrant, provided that the last reported sales price of our Class A Common Stock equals or exceeds $18.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within a 30 tradingday period ending on the third trading day prior to the date on which we give proper notice of such redemption and provided certain other conditions are met. Our Class A Common Stock has recently been trading at such levels, and we may seek to exercise this right after the Warrants become exercisable. If and when such Warrants become redeemable by us, we may not exercise our redemption rights if the issuance of shares of Class A Common Stock upon exercise of the Warrants is not exempt from registration or qualification under applicable state blue sky laws or we are unable to effect such registration or qualification. We will use our best efforts to register or qualify such shares of common stock under the blue sky laws of the state of residence in those states in which the Warrants were offered by Yellowstone in its initial public offering. Redemption of the outstanding Warrants could force the holders of such Warrants (i) to exercise the Warrants and pay the exercise price therefor at a time when it may be disadvantageous for such holder to do so, (ii) to sell the Warrants at the then-current market price when you might otherwise wish to hold the Warrants or (iii) to accept the nominal redemption price which, at the time the outstanding warrants are called for redemption, is likely to be substantially less than the market value of the Warrants. None of the Private Placement Warrants will be redeemable by us so long as they are held by our Sponsor or its permitted transferees.

We will have broad discretion over the use of proceeds from the exercises of the Warrants. Investors may not agree with our decisions, and our use of the proceeds may not yield a return on investment. We intend to use these

net proceeds for general corporate purposes, which may include capital expenditures and working capital. Our use of these proceeds may differ substantially from our current plans. Our failure to apply the net proceeds from the exercises of Warrants and options effectively could impair our ability to pursue our growth strategy or could require us to raise additional capital.

The Public Warrants were issued in registered form under the Warrant Agreement. The Warrant Agreement provides that the terms of the Warrants may be amended without the consent of any holder to cure any ambiguity or correct any defective provision or correct any mistake, but requires the approval by the holders of 50% of the then-outstanding Public Warrants to make any change that adversely affects the interests of the registered holders of Warrants; provided that if an amendment adversely affects the Private Placement Warrants in a different manner than the Public Warrants or vice versa, then the vote or written consent of the holders of 65% of the Public Warrants and 65% of the Private Placement Warrants, voting as separate classes, is required. Accordingly, we may amend the terms of the Public Warrants in a manner adverse to a holder if holders of 50% of the then-outstanding Public Warrants approve of such amendment and, solely with respect to any amendment adversely affecting the Private Placement Warrants in a different manner than the Public Warrants or vice versa, if holders of 65% of the Public Warrants and 65% of the Private Placement Warrants, voting as separate classes, approve of such amendment. Although our ability to amend the terms of the Public Warrants with the consent of 50% of the then-outstanding Public Warrants is unlimited, examples of such amendments could be amendments to, among other things, increase the exercise price of the Warrants, convert the Warrants into cash, shorten the exercise period or decrease the number of shares of Class A Common Stock purchasable upon exercise of a Warrant.

We currently intend to retain our future earnings, if any, to finance the further development and expansion of our business and do not intend to pay cash dividends in the foreseeable future. Any future determination to pay dividends will be at the discretion of our Board and will depend on our financial condition, results of operations, capital requirements, restrictions contained in future agreements and financing instruments, business prospects and such other factors as our Board deems relevant.

The trading market for Class A Common Stock will depend in part on the research and reports that analysts publish about our business. We do not have any control over these analysts. If one or more of the analysts who cover us downgrade our Class A Common Stock or publish inaccurate or unfavorable research about our business, the price of Class A Common Stock would likely decline. If few analysts cover us, demand for Class A Common Stock could decrease and our Class A Common Stock price and trading volume may decline. Similar results may occur if one or more of these analysts stop covering us in the future or fail to publish reports on us regularly.

In order to raise additional capital, we may in the future offer additional shares of our common stock or other securities convertible into or exchangeable for our common stock at prices that may not be the same as the price per share paid by any investor. We may sell shares or other securities in any other offering at a price per share that is less than the price per share paid by any investor, and investors purchasing shares or other securities in the future could have rights superior to you. The price per share at which we sell additional shares of our common stock, or securities convertible or exchangeable into common stock, in future transactions may be higher or lower than the price per share paid by any investor.

The market price of Class A Common Stock may be volatile and, in the past, companies that have experienced volatility in the market price of their stock have been subject to securities class action litigation. We may be the target of this type of litigation in the future. Securities litigation against us could result in substantial costs and divert management’s attention from other business concerns, which could seriously harm our business.

Our ability to expand through new ground leases at airports is integral to our long-term business strategy and requires that we identify and consummate suitable new ground leases or investment opportunities in real estate properties for our portfolio that meet our investment criteria and are compatible with its growth strategy. Our ability to enter into new ground leases on favorable terms, or at all, may be adversely affected by the following significant factors:

Our ability to meet our obligations under the ground leases and our debt service obligations will depend on our ability to generate revenues sufficient in the aggregate to make our payments under the ground leases and our debt service obligations under our outstanding indebtedness and any other indebtedness incurred in the future. Our ability to generate revenues may be adversely affected by a wide variety of unforeseen or unforeseeable events and conditions, including, without limitation, economic changes affecting the HBS industry generally, the airports or the tenants specifically, any of which could result in a default under the tenant leases. In addition, the ability of tenant leases to generate revenues may be adversely affected by competition from other facilities within or outside the airports where the facilities are located, including construction of new facilities at the airports at which we operate or the expansion of hangar facilities by competitors at nearby airports. There can be no assurances that the airports or their competitors will not undertake future improvements that may adversely impact the ability of tenant leases to generate revenues.

Moreover, the terms of our tenant leases currently in place do not extend past the final maturity date of our bond debt. Our ability to make payments under the ground leases or under our debt service obligations through their final maturity will depend upon our success in renewing current tenants or in re-leasing these facilities. The loss of one or more of tenants may (without a similar tenant or tenants to replace such tenant or tenants) have a material adverse effect on our ability to collect rents sufficient to meet our obligations.

Our outstanding indebtedness is secured under the terms of the PABs. We intend to incur additional debt in connection with new hangar projects at new airport locations, refinancing of existing indebtedness, future acquisitions or for other purposes.

In addition, the PABs include, and we expect any other indebtedness we incur in the future to include, customary events of default, the occurrence of any of which, after any applicable cure period, would permit the holders of such indebtedness, among other things, to accelerate payment of all amounts outstanding under such indebtedness and to exercise their remedies with respect to the collateral, including foreclosure and sale of the real estate securing the loans. If any one of these events were to occur, our business and results of operations could be materially and adversely affected.

Each facility in our portfolio is subject to secured indebtedness under the PABs. Secured debt obligations increase the risk of property losses because defaults on indebtedness secured by properties may result in foreclosure actions initiated by holders of the PABs, its trustee, or other lenders and ultimately our loss of the property securing any loans for which it is in default. As described above, our current tenant leases do not extend past the maturity date of the PABs, and as a result we will be required to release each of our sites in order to continue to generate revenue to meet our debt service obligations under the PABs. If any of our facilities are foreclosed upon due to a default, it could materially and adversely affect our business and results of operations.

In addition, the agreements that govern our current indebtedness contain, and the agreements that may govern any future indebtedness that we may incur may contain, financial and other restrictive covenants, which may limit our ability to engage in activities that may be in our long-term best interests. Our failure to comply with those covenants could result in an event of default that, if not cured or waived, could result in the acceleration of our debt and loss of any collateral securing such debt.

Our growth will depend on external sources of capital in order to finance the development of new properties. We may not be able to obtain such financing on favorable terms, in the time period we desire, or at all. There are a number of factors that may limit our ability to raise financing or access capital markets in the future, including future debt and future contractual obligations, our liquidity and credit status, our operating cash flows, the trading price of our Class A common stock, the market conditions in the aviation and/or real estate industries, U.S. and global economic conditions, and the general state of the capital markets. We cannot assure you that we will be able to source external financing for our capital needs, and if we are unable to source financing on acceptable terms, or unable to source financing at all, our business could be materially adversely affected. If we cannot obtain capital from third-party sources, we may not be able to grow our business when strategic opportunities exist, meet the capital and operating needs of our existing properties or satisfy our debt service obligations. To the extent we finance our activities with additional debt, we may become subject to financial and other covenants that may restrict our ability to pursue our business strategy or otherwise constrain our growth and operations.

If additional indebtedness is unavailable to us at reasonable rates or at all, we may not be able to finance additional projects or refinance existing debt when it becomes due. If interest rates are higher when we refinance our debt, our income and cash flow could be reduced, which may hinder our ability to raise more capital by issuing more stock or by borrowing money.

General. COVID-19, a highly contagious upper respiratory tract illness caused by a novel strain of coronavirus, is causing significant adverse health and financial impacts throughout the world and has caused significant disruptions to domestic and international air travel. The World Health Organization declared the outbreak of COVID-19 to be a pandemic, and many state and local governments in the United States issued “stay at home” or “shelter in place” orders as well as travel advisories requiring all travelers coming from states with significant rates of transmission of COVID-19 to quarantine for a 14-day period from the time of their last contact. Such measures severely restricted movement and limited businesses and activities to essential functions. In addition, a number of nations have effectively closed their borders by restricting entry and exit to only essential travel and/or requiring travelers to self-isolate for up to 14 days, further depressing demand for passenger air travel.

Airports and the aviation industry in the United States and the rest of the world have been acutely impacted by the reductions in passenger volumes and flights, as well as by the broader economic shutdown resulting from the COVID-19 outbreak. The ongoing outbreak and associated mandated and voluntary restrictions on travel may adversely affect domestic and international travel and travel-related industries.

Federal Relief Efforts. The United States government, the Federal Reserve Board and foreign governments are taking legislative and regulatory actions and implementing other measures to mitigate the broad disruptive effects of the COVID-19 outbreak on the United States and global economies. The Coronavirus Aid, Relief, and Economic Security Act (which we refer to as the “CARES Act”), approved by the United States Congress and signed by President Trump on March 27, 2020, is one of the actions to address the crisis created by the COVID-19 pandemic and includes among its relief measures direct aid for airports as well as direct aid, loans, and loan guarantees for passenger and cargo airlines. Provisions of the CARES Act, which provides $10 billion of grant assistance to airports, generally include the following: (1) $3.7 billion to be allocated among all U.S. commercial service airports based on number of enplanements in calendar year 2018; (2) $3.7 billion to be allocated among all U.S. commercial service airports based on formulas that consider fiscal year 2018 debt service relative to other airports, and cash-to-debt service ratios; (3) $2 billion to be apportioned in accordance with FAA’s Airport Improvement Program (which we refer to as “AIP”) entitlement formulas, subject to CARES Act formula revisions; (4) $500 million to increase the federal share to 100% for grants awarded in federal fiscal year 2020 under certain grant programs including the AIP; and (5) $100 million reserved for general aviation airports.

On December 27, 2020, President Trump signed the Consolidated Appropriations Act, 2021. Division M of that Act is the Coronavirus Response and Relief Supplemental Appropriation Act, 2021 (which we refer to as “CRRSA”). Title IV of CRRSA provides approximately $2 billion in economic relief to airports to mitigate, prepare for, and respond to the COVID-19 pandemic, including relief from rent and minimum annual guarantees. The $2 billion generally includes the following: (1) $1.75 billion to be apportioned in accordance with AIP entitlement formulas, subject to CARES Act formula revisions with the balance allocated among all U.S. commercial service airports based on number of enplanements in calendar year 2018, (2) $45 million for general aviation and non-primary commercial service airports, (3) $200 million to be provided to commercial services airports to provide relief for rent and minimum annual guarantees for on-airport parking, on-airport rental car and in-terminal airport concessions located at primary airports, and (4) $5 million to the Small Community Air Service Development Program.

The American Rescue Plan Act of 2021, signed into law by President Biden on March 11, 2021, includes $8 billion in funds to be awarded as economic assistance to eligible U.S. airports to prevent, prepare for, and respond to the COVID-19 pandemic. To distribute these funds, the FAA has established the Airport Rescue Grants. The FAA will make grants to all airports that are part of the national airport system, including all commercial service airports.

CARES Act funding, CRRSA funding and American Rescue Plan funding are not sources of revenue of us, and there can be no assurances that any future relief efforts would be available to us.

The hangar space rental segment of the aviation services industry in which we operate is very competitive. We compete with national, regional and local FBO and other hangar real estate companies. Competitor aircraft hangar operators at an airport compete based on various factors, including location of their facilities relative to runways and street access, service, value added features, reliability, and price. Our HBS hangar campuses compete with one or more hangar operators at their respective airports and with operators at nearby airports. Furthermore, ground leases related to HBS and FBO operations may be subject to competitive bidding at the end of their term.

Our competitors may include hangar operators currently operating at certain airports, as well as possible entrants into our market due to new entrants, consolidation, merger, modification of airport master plans, or any other number of factors. These entrants may have additional financial or other resources and/or lower cost structures than us. Other competitors have been in business longer than us. Having greater financial resources may make it easier for these competitors to absorb higher construction costs and other increases in expenses. This could impact our business and results of operations.

Our HBS hangar campuses do not have the right to be the sole provider of services at any airport. Furthermore, despite limited space for further development at certain airports, existing competitors with FBO facilities located at our current or future airports could expand their hangar facilities and additional operators of HBS could begin operations at such airports. Competitors might seek acquisitions in regions and markets competitive to us. Given the variety of factors that impact competitiveness within the HBS industry, we can give no assurance that we will be able to successfully compete, which could, in turn, result in a decline in the trading price of our securities.

Our future success depends upon our ability to attract and retain tenants for hangars at our HBS campuses. The extent to which we achieve growth in our customer base materially influences our business and results of operation. Any number of factors could affect our ability to grow its customer base, including tenant preferences for hangar space and related services, including size and location of the hangar, as well as general economic conditions. The level and volatility of fuel prices may also impact the general aviation industry and our ability to attract and retain tenants. In addition, our ability to attract and retain customers may be dependent on other factors outside of our control, including the future trend of private aircraft sizes, the availability of alternative hangars, including size, location and/or services provided, as well as the external perception of us. Any significant decline in our customer base, or in our rate of growth, could have a material adverse effect on our business and results of operations, which could, in turn, result in a decline in the trading price of our securities.

Our two largest tenants contributed a substantial portion of our revenues. Both of these tenants have ongoing leases with us that expire in December 2023 and November 2025, respectively (assuming no exercise of tenant option extensions). If any of our most significant tenants, currently or in the future, were to discontinue or otherwise reduce their use of our HBS hangar campuses or other services, our business and results of operation would be materially and adversely affected.

The estimated costs of, and the projected schedule for, our capital projects are subject to a number of uncertainties. Our ability to complete these projects within budgets and on expected schedules may be adversely affected by various factors including:

No assurance can be given that the costs of our projects will not exceed budgets or the guaranteed maximum price for such projects or that the completion will not be delayed beyond the projected completion dates. Any such cost overruns or delays could have a material adverse effect on our business, results of operations or market reputation, which could, in turn, result in a decline in the value of our common stock.

HBS and FBO operators compete, in part, based on the overall quality and attractiveness of their facilities. Inadequate maintenance of any of the hangars or other assets comprising our HBS hangar campuses could result in

customers’ electing not to utilize us where another provider operates, or to elect not to use a particular airport where an alternative operator in the same market exists. The resulting decline in tenants or negative impact on our reputation could adversely impact revenue, including from more than one facility, which would have a material adverse effect on our business and results of operation.

Aircraft owners and operators rely on HBS and FBO operators to control the quality of the fuel they provide. Failure to maintain the integrity of fuel supplies as a result of inadequate or inappropriate procedure or maintenance of fuel storage facilities, fuel trucks or related equipment on our part or our suppliers, including FBOs, could result in the introduction of contaminants and could lead to damage or failure of aircraft and could adversely impact the reputation, revenue, and/or profitability of our business.

We are dependent on the continued availability of the services of our employees, many of whom are individually key to our current and future success, as well as the availability of new employees to implement our development plans. Because our management team and key employees are not obligated to provide us with continued service, they could terminate their employment with us at any time.

In addition, the market for employees is highly competitive, especially for employees in fields such as aviation and real estate. While our compensation programs are intended to attract and retain the employees required for us to be successful, ultimately, we may not be able to retain the services of all of our key employees or a sufficient number to execute our development plans. In addition, we may not be able to continue to attract new employees as required. In the event we are unable to attract and retain talent sufficient to support our development plans, our business and results of operations may be adversely affected.

While certain members of our senior management team and directors have extensive experience in real estate, aviation, development, management and finance, no members of our senior management team and board of directors have prior experience in operating a public company. As a public company, we are required to develop and implement substantial control systems, policies and procedures in order to satisfy the company’s periodic SEC reporting. We cannot assure you that management’s past experience will be sufficient to successfully develop and implement these systems, policies and procedures and to operate a public company, which could have a material adverse effect on our business, results of operation, and value of its common stock.

Our management is responsible for establishing and maintaining adequate internal control over financial reporting. Substantial work on our part is required to implement appropriate processes, document the system of internal control over key processes, assess their design, remediate any deficiencies identified and test their operation. This process is expected to be both costly and challenging. As of such time that we are no longer an emerging growth company or a non-accelerated filer and smaller reporting company, Section 404 of the Sarbanes-Oxley Act of 2002 (the “Sarbanes-Oxley Act”) will require our auditors to deliver an attestation report on the effectiveness of our internal control over financial reporting in conjunction with their opinion on our audited financial statements. As a result, there would likely be no outside auditor attestation report on our internal controls over financial reporting for the fiscal years through 2024. We will be required to evaluate our status as a smaller reporting company on an annual basis.

We cannot give any assurances that material weaknesses will not be identified in the future in connection with our compliance with the provisions of Section 404 of the Sarbanes-Oxley Act. The existence of any material weakness would preclude a conclusion by management and our independent auditors that we maintained effective internal control over financial reporting. Our management may be required to devote significant time and expense to remediate any material weaknesses that may be discovered and may not be able to remediate any material weakness in a timely manner. The existence of any material weakness in our internal control over financial reporting

could also result in errors in our financial statements that could require us to restate our financial statements, cause us to fail to meet our reporting obligations and cause investors to lose confidence in our reported financial information, all of which could lead to a decline in the value of our common stock.

We do not directly own the sites we develop and lease to tenants. Instead, we enter into ground leases at each site directly or indirectly (thru a sub-lessor) from airport authorities and other governmental agencies that regulate local airports. Airport authorities may choose not to renew a lease at all or to only renew the lease on terms that are unfavorable to us. In addition, airport authorities may require us to participate in a bidding process to renew a lease, which could require unanticipated capital spending and could divert management’s attention during the pendency of the process. The loss or modification of any of our airport ground leases could adversely impact our business and results of operations.

Unlike other real estate companies that lease space to tenants, we do not directly own the sites we lease. Instead, the sites are subject to long-term ground leases with airport authorities. As a result, we will not be able to sell underlying real estate assets in order to meet liquidity requirements, including our debt service obligations, which could have a material and adverse impact on our liquidity position and ability to meet our obligations.

We cannot assure you that our airport ground leases will be renewed or that our hangars will be re-leased at rental rates equal to or above the current average rental rates or that we will not offer substantial concessions or below-market renewal options to attract new tenants or retain existing tenants.

If the rental rates for our hangar campuses decrease, or if our existing tenants do not renew their leases or we do not re-lease a significant portion of our available space and space for which leases will expire, our business and results of operations could be adversely affected. In order to attract and retain tenants, we may be required to make rent or other concessions to tenants, accommodate requests for renovations and other improvements or provide additional services to our tenants. Additionally, we may need to raise capital to make such expenditures. If we are unable to do so or if capital is otherwise unavailable, we may be unable to make the required expenditures. This could result in non-renewals by tenants upon expiration of their leases and/or an inability to attract new tenants, which would have a material adverse effect on our business and results of operation.

We intend to continue to develop properties across the United States. When we develop properties located in new geographic areas in the United States, we may face risks associated with a lack of market knowledge or understanding of the local market, including the availability and identity of quality tenants, forging new business relationships in the area, and developing an understanding of local government requirements and procedures. Furthermore, the negotiation of a potential expansion into new markets may divert management time and other resources. As a result, we may have difficulties executing our business strategy in these new markets, which could have a negative impact on our business and results of operations.

We are subject to tenant credit risk. Our HBS hangars are generally leased to single or multi hangar tenants, and certain of our tenants constitute a significant percentage of our revenues. Therefore, the financial failure of, or other default by, a single tenant under its lease is likely to cause a significant or complete reduction in the operating cash flow generated by the property leased to that tenant. For instance, any of our tenants could experience a downturn in their businesses as a result of the ongoing COVID-19 pandemic or otherwise, which may weaken their financial condition and liquidity and result in their failure to make timely payments to us or otherwise default under their contracts.

If a tenant defaults under its lease, we may be forced to pursue alternative arrangements with those tenants in order to recover amounts due under the leases or pursue litigation in order to collect payments from tenants who are unable make their lease payments as they come due. We can provide no assurance that we will be able to collect the full amount due under a particular lease if we are forced to pursue alternative payment arrangements or litigation with any of our tenants. If the tenant represents a significant portion of our rental revenues, the impact on our business and results of operations would be material if it impacts the company’s ability to pay ground lease rent payments on a timely basis.

If a bankrupt tenant rejects a lease with us, any claim we might have for breach of the lease, excluding a claim against collateral securing the lease, would be treated as a general unsecured claim. In the event of a tenant's default under its lease or its rejection of the lease in bankruptcy proceedings, we may be unable to locate a replacement tenant in a timely manner or on comparable or better terms. As a result, our financial condition and results of operations could be adversely affected.

We are a holding company with no independent operations and, as such, will be dependent upon the operations of our subsidiaries. Our subsidiaries’ operations rely upon the authority granted under certain ground leases to operate project sites. Each operating subsidiary with bond debt is structured as a special purpose entity. In the event of the bankruptcy of one or more of these subsidiaries, delays in the payment of rent, fees or loan payments may occur under the automatic stay provisions of the United States Bankruptcy Code. Moreover, a subsidiary debtor as lessee or a trustee in bankruptcy may reject a ground lease altogether, thereby extinguishing the respective subsidiary’s duty to pay rent and its right to use the leased property. In addition, a subsidiary lessee may fail to make rental or fee payments when due to the respective airport landlord, regardless of its financial situation. Such bankruptcy or default of a subsidiary lessee could result in the loss of the leased property, which is critical to the operation of our business. A loss of any leased property could have a material adverse effect on our business and results of operations.

To the extent a ground lease constitutes a “true lease,” a subsidiary that has executed its applicable ground lease, or other executory contract, with an airport landlord and seeks protection under the U.S. bankruptcy laws must, subject to the bankruptcy court’s approval, assume or reject (a) its ground lease within 120 days after the bankruptcy filing (subject to court approval, a one-time 90-day extension is allowed (further extensions are subject to the consent of the relevant airport landlords)), and (b) its other executory contracts with the airport landlord no later than the confirmation of a plan of reorganization.

In the event of assumption and/or assumption and assignment of any executory contract with a third party, the subsidiary would be required to cure any pre- and post-petition monetary defaults and provide adequate assurance of future performance under the ground lease or other applicable agreements.

Rejection of a ground lease or other executory contract, in general, is treated as a pre-petition breach of contract. Subject to certain exceptions, this rejection relieves the subsidiary of performing future obligations under the contract, but will give rise to the tenant’s loss of use of the leased property and a pre-petition general unsecured claim of the airport landlord for rejection damages, the amount of which in the case of a ground lease or other agreement is limited by the United States Bankruptcy Code generally to any amounts due and payable prior to the bankruptcy plus the greater of (a) the rent reserved by such lease, without acceleration, for one year of rent; or (b) 15% of the total remaining rent payments, not to exceed three years. However, the amount ultimately received in the event of a rejection of a ground lease or other agreement could be considerably less than the maximum amounts allowed under the United States Bankruptcy Code. In addition, payments made by a subsidiary in bankruptcy within 90 days of filing a bankruptcy case could be deemed to be an “avoidable preference” under the United States Bankruptcy Code and thus subject to recapture by the debtor-in-possession or its trustee in bankruptcy. In general, risks associated with bankruptcy include risks of substantial delay in payment or of non-payment and the risk that the airport landlord may not be able to enforce any of its remedies under the agreements with a bankrupt borrower.

During the pendency of a bankruptcy proceeding, a debtor subsidiary may not, absent a court order, make any payments to the airport landlord to us on account of goods and services provided prior to the bankruptcy. Thus, the airport landlord or our stream of payments from a debtor subsidiary would be interrupted to the extent of pre-petition goods and services, including accrued loan and lease payments, which would have a material adverse effect on our business and results of operation.

In addition, with respect to tenant leases, under current bankruptcy law, in the event of a bankruptcy of such tenant, the tenant can generally assume or reject a lease within a certain number of days of filing its bankruptcy petition. If a tenant rejects the lease, our damages as a landlord, subject to availability of funds from the bankruptcy estate, are generally limited to the greater of (1) one year's rent and (2) the rent for 15% of the remaining term of the lease, not to exceed three years. Any such event could have a material adverse effect on our business and results of operations.

We use industry and airport-specific general aviation traffic data published by the FAA, as well as data from private sources, to identify trends in the aircraft hangar industry. We also use this data as an input to decision-making, including in strategic planning and pricing matters. Both the public and private data, however, has several limitations and challenges. As a result, the use of such data may result in decisions in strategic planning or pricing that are incorrect or inefficient, which could have a material adverse effect on our business and results of operation.

We are subject to extensive regulatory requirements and compliance with those requirements could result in significant costs. For example, the FAA, from time to time, issues directives and other regulations relating to the management, maintenance, and operation of airport facilities. Compliance with those requirements may cause us to incur significant expenditures.

In addition, the proposal and enactment of additional laws and regulations, including by the TSA, as well as any failure to comply with such laws and regulations, could significantly increase the cost of our operations and reduce overall revenue. Moreover, certain new regulations, if implemented, could decrease the convenience and attractiveness of general aviation travel relative to commercial air travel and may adversely impact demand for our services.

Under the ADA, places of public accommodation must meet certain federal requirements related to access and use by disabled persons. Noncompliance with these requirements could result in additional costs to attain compliance, the imposition of fines by the federal government or the award of damages or attorney’s fees to private litigants. If we are required to make unanticipated expenditures to comply with the ADA or other regulations, including removing access barriers, then our business and results of operations may be adversely affected.

From time to time, the President of the United States, the United States Congress and/or state legislatures have proposed and could propose in the future, legislation that, if enacted, could cause interest on PABs to be subject, directly or indirectly, to federal income taxation or to be subject to state income taxation. Clarifications of the Internal Revenue Code of 1986 (the “Code”), as amended, or court decisions may also cause interest on PABs to be subject, directly or indirectly, to federal income taxation or to be subject to state income taxation. The introduction or enactment of any such legislative proposals or any clarification of the Code or court decisions may also affect the market price for, or marketability of, PABs. We expect to issue PABs in the future to partially fund our expansion of hangar campuses at new airport sites. Lack of access to PABs due to change in law or market access would have an increase in the cost of our debt and our future financial results.

In response to significant events, local, state and federal governments have and may in the future adopt regulations that could impact our operations. For example, as noted above, in response to the COVID-19, certain localities adopted restrictions on the use of certain of our services facilities and limited our ability to complete development projects. Similar restrictions could be imposed in the future in response to significant events and these restrictions could adversely impact our business and results of operations.

We carry comprehensive liability, fire, property damage, and business interruption insurance on our HBS hangar campuses, with policy specifications and insured limits that we believe are customary for similar properties. An unanticipated number of claims under the insurance policy or policies, however, could result in payment of unanticipated deductibles and increased premiums, which could result in a material adverse effect on our business and results of operations.

As with all real estate, if reconstruction (for example, following fire or other casualty) or any major repair or improvement is required to the damaged property, changes in laws and governmental regulations may be applicable and may materially affect the cost to, or ability of, us to affect such reconstruction major repair or improvement. In addition, there can be no assurance that the amount of insurance required or provided would be sufficient to cover damages caused by any casualty, or that such insurance will be commercially available in the future.

There can also be no assurance that any loss incurred will be of a type covered by such insurance and will not exceed the limits of such insurance. For instance, there are certain types of losses, such as losses resulting from wars, terrorism or certain acts of God, that generally are not insured because they are either uninsurable or not economically insurable. Should an uninsured loss or a loss in excess of insured limits occur, we could suffer disruption of rental income, potentially for an extended period of time, while remaining responsible for any financial obligations relating to the applicable HBS hangar campus, which would have a material adverse effect on our business and results of operations.

In the event that we experience a substantial or comprehensive loss of one of our properties, we may not be able to rebuild such property to its existing specifications. Further, reconstruction or improvement of such a property may require significant upgrades to meet zoning and building code requirements. Environmental and legal restrictions could also restrict the rebuilding of properties.

Our businesses are subject to numerous statutes, rules and regulations relating to environmental protection and we are exposed to various environmental risk and hazards, including the environmental protection requirements related to the storage and handling of jet fuel and compliance with firefighting regulations. Materialization of these risks could result in substantial losses including personal injury, loss of life, damage or destruction of property and equipment, and environmental damage. Any losses we face could be greater than insurance levels maintained by our businesses and could have an adverse effect on us and our businesses and results of operations. We also could be subject to fines and penalties for violation of applicable environmental regulations, which could be substantial. In addition, disruptions to physical assets could reduce our ability to serve customers and adversely affect future rentals, services and cash flows.

Failure to comply with regulations or other claims may interrupt operations and result in civil or criminal penalties, significant unexpected compliance costs and liabilities that could adversely affect the profitability of our business. These rules and regulations are subject to change, and compliance with any changes could result in a restriction of the activities of our businesses, significant capital expenditures, and/or increased ongoing operating costs.

We may also be required to address other prior or future environmental contamination, including soil and groundwater contamination that results from the spillage of fuel, hazardous materials, or other pollutants. Any past contamination of the properties could result in remediation obligations, personal injury, property damage, environmental damage, or similar claims by third parties.

Under various federal, state, and local environmental statutes, rules and regulations, a current or previous owner or operator of real property may be liable for noncompliance with applicable environmental and health and safety requirements and for the costs of investigation, monitoring, removal or remediation of hazardous materials. These laws often impose liability, whether the current owner or operator knew of, or was responsible for, the presence of hazardous materials. Persons who arrange for the disposal or treatment of hazardous materials may also be liable for the costs of removal or remediation of those materials at the disposal or treatment facility, whether or not that facility is or ever was owned or operated by that person and whether or not the original disposal or treatment activity

accorded with all regulatory requirements. The presence of hazardous materials on a property could result in personal injury, loss of life, damage or destruction of property and equipment, environmental damage and/or claims by third parties that could have a material adverse effect on our business and results of operations.

Our properties may be exposed to rare catastrophic weather events, such as severe storms, floods or wildfires. If the frequency of extreme weather events increases due to climate change, our exposure to these events could increase. In addition, in connection with any development project, we may be harmed by potential changes to the supply chain or stricter energy efficiency standards for industrial buildings. To the extent climate change causes shifts in weather patterns, our markets could experience negative consequences, including declining demand for hangar space and an inability to operate our hangar campuses. Climate change may also have indirect negative effects on our business by increasing the cost of, or decreasing the availability of, property insurance on terms we find acceptable and increasing the cost of, among other things, energy, aircraft fuel and building materials.

In addition, compliance with new laws or regulations relating to climate change, including compliance with “green” building codes, may require us to make improvements to our existing properties or result in increased operating costs that we may not be able to effectively pass on to our tenants. Any such laws or regulations could also impose substantial costs on our tenants, thereby impacting the financial condition of our tenants and their ability to meet their lease obligations.

Cyber incidents may result in disrupted operations, misstated or unreliable financial data, liability for stolen assets or information, increased cybersecurity protection and insurance costs and litigation and damage to our tenants. As our reliance on technology has increased, so have the risks posed to our information systems, both internal and those we have outsourced. Any processes, procedures and internal controls that we implement, as well as our increased awareness of the nature and extent of a risk of a cyber-incident, do not guarantee that our financial results, operations, business relationships, confidential information or common stock price will not be negatively impacted by such an incident.

Insider or employee cyber and security threats are increasingly a concern for all companies, including us. In addition, social engineering and phishing are a particular concern for companies with employees. As a landlord, we are also susceptible to cyber-attacks on our tenants and their payment information. We are continuously working to deploy information technology systems and to provide employee awareness training around phishing, malware and other cyber risks to ensure that we are protected against cyber risks and security breaches. Such technology and training, however, may not be sufficient to protect us and our tenants from all risks.

As a smaller company, we use third-party vendors to assist us with our network and information technology requirements. While we carefully select these third-party vendors, we cannot control their actions. Any problems caused by these third parties, including those resulting from breakdowns or other disruptions in communication services provided by a vendor, failure of a vendor to handle current or higher volumes, cyber-attacks and security breaches at a vendor could adversely affect our business and results of operations.

We may not be able to adequately address these additional risks. If we were unable to do so, our operations might suffer, which may adversely impact our results of operations and financial condition.

We qualify as a “controlled company” within the meaning of the corporate governance standards of The NYSE American. Under these rules, a listed company of which more than 50% of the voting power is held by an individual, group or another company is a “controlled company” and may elect not to comply with certain corporate governance requirements, including the requirement that (i) a majority of the our Board consist of independent directors, (ii) our compensation committee is composed entirely of independent directors and (iii) director nominees be selected or recommended to our Board by independent directors.

We rely on certain of these exemptions. As a result, we do not have a compensation committee consisting entirely of independent directors and our directors are not nominated or selected solely by independent directors. We may also rely on the other exemptions so long as we qualify as a controlled company. To the extent we rely on any of these exemption, holders of Class A Common Stock will not have the same protections afforded to stockholders of companies that are subject to all of the corporate governance requirements of The NYSE American.

In connection with the Business Combination, we, each of Tal Keinan, Due West Partners LLC and Center Sky Harbour LLC (collectively, “the Existing Sky Equityholders”), and the Sponsor (collectively the “Stockholder Parties”) entered into a stockholders’ agreement (the “Stockholders’ Agreement”). Pursuant to the terms of the Stockholders’ Agreement, each of the parties thereto are required to take all necessary action to cause the specified designees of the Existing Sky Equityholders to be nominated to serve on our Board, and each of the holders are required, among other things, to vote all of the securities of SHG Corporation held by such party in a manner necessary to elect the individuals designated by such holders. For so long as these parties hold a majority of Common Stock, they will be able to control the composition of our Board, which in turn will be able to control all matters affecting us, subject to the terms of the Stockholders’ Agreement, including:

Because the interests of these stockholders may differ from our interests or the interests of our other stockholders, actions that these stockholders take with respect to us may not be favorable to us or our other stockholders.

Our Bylaws provide that, to the fullest extent permitted by law, and unless we provide notice in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware is the sole and exclusive forum for (i) any derivative action or proceeding brought on behalf of SHG Corporation, (ii) any action asserting a claim of breach of a fiduciary duty owed by any of SHG Corporation’s directors, officers, employees or agents to SHG Corporation or its stockholders, (iii) any action asserting a claim arising pursuant to any provision of the DGCL, the Certificate of Incorporation or SHG Corporation Bylaws or as to which the DGCL confers jurisdiction on the Court of Chancery of the State of Delaware or (iv) any action asserting a claim governed by the internal affairs doctrine, in each such case subject to such Court of Chancery having personal jurisdiction over the indispensable parties named as defendants therein. Our Bylaws further provide that the federal district courts of the United States is the exclusive forum for resolving any complaint asserting a cause of action arising under the Securities Act. There is uncertainty as to whether a court would enforce such a provision relating to causes of action arising under the Securities Act, and investors cannot waive compliance with the federal securities laws and the rules and regulations thereunder. The clauses described above do not apply to suits brought to enforce a duty or liability created by the Exchange Act or any other claim for which the federal courts have exclusive jurisdiction. Although we believe these provisions benefit us by providing increased consistency in the application of Delaware law in the types of lawsuits to which it applies, a court may determine that this provision is unenforceable, and to the extent it is enforceable, the provision may have the effect of discouraging lawsuits against our directors and officers, although our stockholders will not be deemed to have waived our compliance with federal securities laws and the rules and regulations thereunder.

We qualify as an “emerging growth company” as defined in Section 2(a)(19) of the Securities Act, as modified by the Jumpstart our Business Startups Act of 2012 (the “JOBS Act”). As such, we are eligible for and we take advantage of certain exemptions from various reporting requirements applicable to other public companies that are not emerging growth companies for as long as it continues to be an emerging growth company, including, but not limited to, (i) not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act, (ii) reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements and (iii) exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved. As a result, our stockholders may not have access to certain information they may deem important. We will remain an emerging growth company until the earliest of (i) the last day of the fiscal year (a) following the fifth anniversary of the completion of our IPO, (b) in which we have total annual gross revenue of at least $1.07 billion, or (c) in which we are is deemed to be a large accelerated filer, which means the market value of our common stock that is held by non-affiliates exceeds $700 million as of the prior June 30th, and (ii) the date on which we have issued more than $1.0 billion in non-convertible debt securities during the prior three year period. We cannot predict whether investors will find our securities less attractive because it will rely on these exemptions. If some investors find our securities less attractive as a result of its reliance on these exemptions, the trading prices of our securities may be lower than they otherwise would be, there may be a less active trading market for our securities and the trading prices of our securities may be more volatile.

Because members of our senior management team hold most or all of their economic interest in Sky directly through holding companies, they may have interests that do not align with, or conflict with, those of the holders of Class A Common Stock or with us. For example, members of our senior management team may have different tax positions from those of SHG Corporation and/or holders of Class A Common Stock, which could influence their decisions regarding whether and when to enter into certain transactions or dispose of assets, whether and when to incur new or refinance existing indebtedness, and whether and when we should terminate the Tax Receivable Agreement and accelerate the obligations thereunder. In addition, the structuring of future transactions and investments may take into consideration the members’ tax considerations even where no similar benefit would accrue to SHG Corporation.

As a public company, we are subject to the reporting requirements of the Exchange Act, the Sarbanes-Oxley Act, the Dodd-Frank Wall Street Reform and Consumer Protection Act, the listing requirements of the NYSE and other applicable securities rules and regulations. Compliance with these rules and regulations increase our legal and financial compliance costs, make some activities more difficult, time-consuming or costly and increase demand on our systems and resources, particularly after we are no longer an “emerging growth company.” The Sarbanes-Oxley Act requires, among other things, that we maintain effective disclosure controls and procedures and internal control over financial reporting. In order to maintain and, if required, improve our disclosure controls and procedures and internal control over financial reporting to meet this standard, significant resources and management oversight may be required. As a result, management’s attention may be diverted from other business concerns, which could adversely affect our business and operating results. We may need to hire more employees in the future or engage outside consultants to comply with these requirements, which will increase our costs and expenses.

We are a holding company and have no material assets other than our ownership of Sky Common Units. We are not expected to have independent means of generating revenue or cash flow, and our ability to pay our taxes, operating expenses, and pay any dividends in the future will be dependent upon the financial results and cash flows

of Sky. There can be no assurance that Sky will generate sufficient cash flow to distribute funds to us or that applicable state law and contractual restrictions, including negative covenants under debt instruments will permit such distributions. If Sky does not distribute sufficient funds to us to pay our taxes or other liabilities, we may default on contractual obligations or have to borrow additional funds. In the event that we are required to borrow additional funds it could adversely affect our liquidity and subject us to additional restrictions imposed by lenders.

Sky will continue to be treated as partnership for U.S. federal income tax purposes and, as such, generally will not be subject to any entity-level U.S. federal income tax. Instead, taxable income will be allocated, for U.S. federal income tax purposes, to the holders Sky Common Units. Under the terms of the third amended and restated Operating Agreement (the “ A&R Operating Agreement”), Sky is obligated to make pro rata tax distributions to holders of Sky Common Units calculated at certain assumed rates. In addition to tax expenses, we will also incur expenses related to our operations, including payment obligations under the Tax Receivable Agreement, which could be significant and some of which will be reimbursed by Sky (excluding payment obligations under the Tax Receivable Agreement). For so long as we are Managing Member (as defined in the A&R Operating Agreement) of Sky, we intend to cause Sky to make ordinary distributions and tax distributions to the holders of Sky Common Units on a pro rata basis in amounts sufficient to enable us to cover all applicable taxes, relevant operating expenses, payments under the Tax Receivable Agreement and dividends, if any, declared by us. However, Sky’s ability to make such distributions may be subject to various limitations and restrictions, including, but not limited to, retention of amounts necessary to satisfy the obligations of Sky and its subsidiaries and restrictions on distributions that would violate any applicable restrictions contained in Sky’s debt agreements, or any applicable law, or that would have the effect of rendering Sky insolvent. To the extent we are unable to make payments under the Tax Receivable Agreement for any reason, such payments will be deferred and will accrue interest until paid. Additionally, nonpayment for a specified period and/or under certain circumstances may constitute a material breach of a material obligation under the Tax Receivable Agreement and therefore accelerate payments under the Tax Receivable Agreement, which could be substantial.

We anticipate that the distributions received from Sky may, in certain periods, exceed our actual tax liabilities and obligations to make payments under the Tax Receivable Agreement. The board, in its sole discretion, will make any determination from time to time with respect to the use of any such excess cash so accumulated, which may include, among other uses, to pay dividends on our Class A Common Stock. We will have no obligation to distribute such cash (or other available cash other than any declared dividend) to our stockholders.

Following closing of the Business Combination, we, Sky, the Existing Sky Equityholders and Tal Keinan (in the capacity of “TRA Holder Representative”) entered into the Tax Receivable Agreement. Pursuant to the Tax Receivable Agreement, we are generally required to pay the TRA Holders 85% of the amount of savings, if any, in U.S. federal, state, local, and foreign taxes that are based on, or measured with respect to, net income or profits, and any interest related thereto that the Tax Group (i.e., SHG Corporation and applicable consolidated, unitary, or combined Subsidiaries) realizes, or is deemed to realize, as a result of certain Tax Attributes, which include:

Payments under the Tax Receivable Agreement generally will be based on the tax reporting positions that we determine (with the amount of subject payments determined in consultation with an advisory firm and subject to the TRA Holder Representative’s review and consent), and the Internal Revenue Service (the “IRS”) or another taxing authority may challenge all or any part of a position taken with respect to tax attributes or the utilization thereof, as well as other tax positions that we take, and a court may sustain such a challenge. In the event that any tax attributes initially claimed or utilized by the tax group are disallowed, the TRA Holders will not be required to reimburse us

for any excess payments that may previously have been made pursuant to the Tax Receivable Agreement, for example, due to adjustments resulting from examinations by taxing authorities. Rather, any excess payments made to such TRA Holders will be applied against and reduce any future cash payments otherwise required to be made by us to the applicable TRA Holders under the Tax Receivable Agreement, after the determination of such excess. However, a challenge to any tax attributes initially claimed or utilized by the tax group may not arise for a number of years following the initial time of such payment and, even if challenged earlier, such excess cash payment may be greater than the amount of future cash payments that we might otherwise be required to make under the terms of the Tax Receivable Agreement. As a result, there might not be future cash payments against which such excess can be applied and we could be required to make payments under the Tax Receivable Agreement in excess of the tax group’s actual savings in respect of the tax attributes.

Moreover, the Tax Receivable Agreement will provide that, in certain early termination events, we will be required to make a lump-sum cash payment to all the TRA Holders equal to the present value of all forecasted future payments that would have otherwise been made under the Tax Receivable Agreement, which lump-sum payment would be based on certain assumptions, including those relating to there being sufficient future taxable income of the tax group to fully utilize the tax attributes over certain specified time periods and that all Sky Common Units that had not yet been exchanged for Class A Common Stock or cash are deemed exchanged for cash. The lump-sum payment could be material and could materially exceed any actual tax benefits that the tax group realizes subsequent to such payment.

Payments under the Tax Receivable Agreement will be our obligations and not obligations of Sky. Any actual increase in our allocable share of Sky and its relevant subsidiaries’ tax basis in relevant assets, as well as the amount and timing of any payments under the Tax Receivable Agreement, will vary depending upon a number of factors, including the timing of exchanges, the market price of the Class A Common Stock at the time of an exchange of Sky Common Units by a TRA Holder pursuant to the terms of the A&R Operating Agreement and the amount and timing of the recognition of the Tax Group’s income for applicable tax purposes. While many of the factors that will determine the amount of payments that we will be required to make under the Tax Receivable Agreement are outside of our control, we expect that the aggregate payments we will be required to make under the Tax Receivable Agreement could be substantial and, if those payments substantially exceed the tax benefit we realize in a given year or in the aggregate, could have an adverse effect on our financial condition, which may be material.

Any payments made by us under the Tax Receivable Agreement will generally reduce the amount of overall cash flow that might have otherwise been available to us. To the extent that we are unable to make timely payments under the Tax Receivable Agreement for any reason, the unpaid amounts will be deferred and will accrue interest until paid. Additionally, nonpayment for a specified period and/or under certain circumstances may constitute a material breach of a material obligation under the Tax Receivable Agreement and therefore accelerate payments due under the Tax Receivable Agreement. Furthermore, our future obligation to make payments under the Tax Receivable Agreement could make us a less attractive target for an acquisition, particularly in the case of an acquirer that cannot use some or all of the Tax Attributes that may be deemed realized under the Tax Receivable Agreement.

We could also be adversely affected by changes in applicable tax laws, regulations, or administrative interpretations thereof in the United States or other jurisdictions and changes in tax law could reduce our after-tax income and adversely affect our business and financial condition. For example, the U.S. federal tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”), enacted in December 2017, resulted in fundamental changes to the Code including, among many other things, a reduction to the federal corporate income tax rate, a partial limitation on the deductibility of business interest expense, a limitation on the deductibility of certain director and officer compensation expense, limitations on net operating loss carrybacks and carryovers and changes relating to the scope and timing of U.S. taxation on earnings from international business operations. Subsequent legislation, the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) enacted on March 27, 2020, relaxed certain of the limitations imposed by the Tax Act for certain taxable years, including the limitation on the use and carryback of net operating losses and the limitation on the deductibility of business interest expense. The exact impact of the Tax Act and the CARES Act for future years is difficult to quantify, but these changes could materially affect SHG Corporation, Sky, or its subsidiaries. In addition, other changes could be enacted in the future to increase the corporate tax rate, limit further the deductibility of interest, or effect other changes that could have a material adverse effect on SHG Corporation’s financial condition. Such changes could also include

increases in state taxes and other changes to state tax laws to replenish state and local government finances depleted by costs attributable to the COVID-19 pandemic and the reduction in tax revenues due to the accompanying economic downturn.

In addition, our effective tax rate and tax liability are based on the application of current income tax laws, regulations and treaties. These laws, regulations and treaties are complex and often open to interpretation. In the future, the tax authorities could challenge our interpretation of laws, regulations and treaties, resulting in additional tax liability or adjustment to our income tax provision that could increase our effective tax rate. Changes to tax laws may also adversely affect our ability to attract and retain key personnel.

We will receive up to an aggregate of approximately $167 million from the exercise of the Warrants, assuming the exercise in full of all of the Warrants for cash. We expect to use the net proceeds, if any, from the exercise of the Warrants for general corporate purposes, which may include acquisitions and other business opportunities. We will have broad discretion over the use of proceeds from the exercise of the Warrants. There is no assurance that the holders of the Warrants will elect to exercise any or all of such Warrants. To the extent that the Warrants are exercised on a “cashless basis,” the amount of cash we would receive from the exercise of the Warrants will decrease. The Public Warrants may be exercised on a cashless basis beginning on April 21, 2022 if the registration statement of which this prospectus forms a part is not effective. The Private Placement Warrants may be exercised on a cashless basis any time upon the earlier of the effectiveness of the registration statement of which this prospectus forms a part and April 21, 2022.

As of the date of this prospectus, our Warrants are “out of the money,” which means that the trading price of the shares of our Class A Common Stock underlying our Warrants is below the $11.50 exercise price (subject to adjustment as described herein) of the Warrants. For so long as the Warrants remain “out of the money,” we do not expect warrantholders to exercise their warrants and, therefore, we do not expect to receive cash proceeds from any such exercise. See “Risk Factors – There is no guarantee that the Warrants will be in the money, and they may expire worthless and the terms of our Warrants may be amended” for more information.

All of the Private Placement Warrants and shares of Class A Common Stock underlying the Private Placement Warrants offered by the Selling Securityholder pursuant to this prospectus will be sold by the Selling Securityholder for its account. We will not receive any of the proceeds from these sales.

The offering price of the shares of Class A Common Stock underlying the Warrants offered hereby is determined by reference to the exercise price of the Warrants of $11.50 per share. The Public Warrants are listed on the NYSE American under the symbol “SKYH WS.”

We cannot currently determine the price or prices at which the Private Placement Warrants may be sold by the Selling Securityholder under this prospectus.

The resale of the shares of Class A Common Stock and Private Placement Warrants, or the perception that such resale may occur, may cause the market price of our Class A Common Stock and Warrants to decline substantially. See “Risk Factors – The sale of all of the securities registered for resale hereunder and future sales of substantial amounts of our securities in the public market (including the shares of Class A Common Stock issuable upon exercise of the Warrants), or the perception that such sales may occur, may cause the market price of our securities to decline significantly.”

Our Class A Common Stock and Public Warrants are currently listed on the NYSE American under the symbols “SKYH” and “SKYH WS,” respectively. Prior to the consummation of the Business Combination, YAC’s Units, YAC’s Class A Common Stock and YAC’s Public Warrants were listed on the NASDAQ Capital Market (“NASDAQ”) under the symbols “YSACU”, “YSAC” and “YSACW,” respectively. Upon consummation of the Business Combination, YAC’s Units automatically separated into the component securities, YAC’s Class A Common Stock was reclassified as our Class A Common Stock and YAC’s Public Warrants were reclassified as our Public Warrants.

As of April 28, 2022, there were four holders of record of Class A Common Stock and three holders of record of Warrants. However, because many of the shares of Class A Common Stock and the Warrants are held by brokers and other institutions on behalf of stockholders, we believe there are substantially more beneficial holders of Class A Common Stock and Warrants than record holders.

We have not paid any cash dividends on our Class A Common Stock to date. We may retain future earnings, if any, for future operations, expansion and debt repayment and has no current plans to pay cash dividends for the foreseeable future. Any decision to declare and pay dividends in the future will be made at the discretion of our Board and will depend on, among other things, our results of operations, financial condition, cash requirements, contractual restrictions and other factors that the Board may deem relevant. In addition, our ability to pay dividends may be limited by covenants of any existing and future outstanding indebtedness we or our subsidiaries incur. We do not anticipate declaring any cash dividends to holders of the Class A Common Stock in the foreseeable future.

The following unaudited pro forma condensed combined financial information has been prepared in accordance with Article 11 of Regulation S-X. For each of the periods presented, the unaudited pro forma condensed combined financial information reflects the combination of historical financial information of Sky and Sky Harbour Group Corporation, f/k/a YAC, and gives effect to (1) YAC’s IPO, concurrent private placement of warrants to purchase its Class A common stock and payment of offering expenses and (2) the Business Combination, $45,000,000 BOC PIPE, the payment of transaction costs associated with the Business Combination and the cash settlement of certain obligations in accordance with YAC’s initial public offering (for purposes of this section, collectively, the “Transactions”). For purposes of this section, Sky and YAC are collectively referred to as the “Companies,” and the Companies, subsequent to the Business Combination, are referred to herein as the “Combined Company.”

The unaudited pro forma condensed combined financial information has been presented to provide relevant information necessary for an understanding of the Combined Company subsequent to completion of the Transactions. The unaudited pro forma condensed combined balance sheet, which has been presented for the Combined Company as of December 31, 2021, gives effect to the Transactions as if they were consummated on December 31, 2021. The unaudited pro forma condensed combined statement of operations, which has been presented for the year ended December 31, 2021, gives pro forma effect to the Transactions as if they had occurred on January 1, 2021. The unaudited pro forma condensed combined balance sheet does not purport to represent, and is not necessarily indicative of, what the actual financial condition of the Combined Company would have been had the Transactions taken place on December 31, 2021, nor is it indicative of the financial condition of the Combined Company as of any future date. The unaudited pro forma condensed combined statement of operations does not purport to represent, and is not necessarily indicative of, what the actual results of operations of the Combined Company would have been had the Transactions taken place on January 1, 2021, nor is it necessarily indicative of the results of operations of the Combined Company for any future period.

The unaudited pro forma condensed combined financial information was derived from, and should be read in conjunction with, the following historical financial statements and notes thereto, and other information relating to Sky and YAC included elsewhere in this prospectus:

The unaudited pro forma condensed combined financial information should also be read together with “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” as well as other information included elsewhere in this prospectus.

YAC was formed as a blank check company incorporated as a Delaware corporation for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses. YAC completed its IPO of 12,500,000 units at an offering price of $10.00 per unit on October 26, 2020. Simultaneously with the closing of the IPO, YAC completed a private placement of 7,500,000 warrants issued to the Sponsor, generating total proceeds of $7,500,000. On December 1, 2020, the underwriters' over-allotment option was partially exercised resulting in the purchase of an additional 1,098,898 Units, generating additional gross proceeds to YAC of $10,988,980 and incurring offering costs of approximately $700,000 (including $600,000 in underwriting fees). In connection with the IPO, including the underwriters’ partial exercise of the over-allotment option, the number of shares of Class B Common Stock was decreased to 3,399,724 shares to maintain the Sponsor’s 20% ownership. Also in connection with the partial exercise of the underwriters' overallotment option, the Sponsor purchased private placement warrants at a price of $1.00 per whole warrant to purchase an additional 219,779 shares of YAC Class A Common Stock at a price of $11.50 per share. Therefore, in connection with the partial exercise of the underwriters' overallotment option, an additional $11,208,760 in proceeds from the exercise of the over-allotment and the sale of additional private placement warrants were placed in the trust account, resulting

in total funds held in the trust account of $138,716,226, inclusive of earned interest on investments held in the trust account at that time. The trust account was located in the United States at JP Morgan Chase Bank, N.A. with Continental Stock Transfer & Trust Company acting as trustee. The funds were invested in U.S. government securities with a maturity of 185 days or less or in money market funds meeting certain conditions under Rule 2a-7 under the Investment Company Act of 1940, as amended, which invest only in direct U.S. government treasury obligations.

On January 25, 2022, YAC consummated the Business Combination with Sky, pursuant to the Equity Purchase Agreement among the parties dated as of August 1, 2021, as amended. With YAC being the legal acquirer of Sky, consideration for the Business Combination consisted of shares of YAC’s Class B Common Stock wherein each holder of Sky Common Units received one share of Class B Common Stock for each Sky Common Unit. However, for financial reporting purposes, Sky is deemed the accounting acquirer and YAC the acquired company. See “Accounting for the Business Combination” below.

The following activities are reflected in the unaudited pro forma condensed combined financial statements below (either in the historical results or through pro forma adjustments):

Following the closing, the Combined Company is organized as an “Up-C” structure in which substantially all of the operating assets of Sky’s business are held by Sky and it continues to operate through the subsidiaries of Sky. Upon the closing, YAC was renamed as “Sky Harbour Group Corporation,” and the Company’s only assets are its equity interests in Sky. The Company is the sole managing member of Sky in accordance with the terms of the A&R Operating Agreement.

Notwithstanding the legal form of the Business Combination pursuant to the Equity Purchase Agreement, the Business Combination was accounted for as a reverse recapitalization in accordance with U.S. GAAP. Under this method of accounting, YAC was treated as the acquired company for financial reporting purposes, and Sky was treated as the accounting acquirer. In accordance with this accounting method, the Business Combination was treated as the equivalent of Sky issuing equity for the net assets of YAC, accompanied by a recapitalization. The net assets of YAC were stated at historical cost, with no goodwill or other intangible assets recorded, and operations prior to the Business Combination will be those of Sky. Sky has been deemed the accounting acquirer for purposes of the Business Combination based on an evaluation of the following facts and circumstances:

The Existing Sky Equityholders hold a corresponding share of Class B common stock for each Sky common unit they hold. Each Sky common unit can be redeemed for a share of Class A common stock of the Company and a corresponding share of Class B common stock of the Company will be cancelled. The Class B common stock held by the Existing Sky Equityholders entitles the holders thereof to one vote on all matters which stockholders are generally entitled to vote but have no economic rights. The corresponding economic rights associated with Sky common units held by Existing Sky Equityholders are presented as non-controlling interests in the Combined Company’s financial statements.

In accordance with Article 11 of Regulation S-X, pro forma adjustments to the historical combined financial information of Sky and YAC only give effect to events that are both factually supportable and directly attributable to the Transactions. In addition, for purposes of preparation of the unaudited pro forma condensed combined statement of operations, adjustments have only been made to give effect to events that are expected to have a continuing impact on the results of the Combined Company following the Business Combination. The unaudited pro forma condensed combined financial information does not give effect to any synergies, operating efficiencies, or other benefits that may result from consummation of the Transactions. Sky and YAC have not had any historical relationship prior to the Business Combination. Therefore, preparation of the accompanying pro forma financial information did not require any adjustments related to such historical transactions.

Pursuant to YAC’s charter prior to the Business Combination, YAC’s public stockholders were offered the opportunity to redeem their shares of Class A common stock for cash upon consummation of the Business Combination, irrespective of whether they voted for or against the Business Combination. If a public stockholder properly exercised its right to redemption of its shares, YAC redeemed each share for cash equal to the public stockholder’s pro rata portion of the trust account, calculated as of two business days prior to the consummation of the Business Combination.

The unaudited pro forma condensed combined financial information has been prepared to reflect the redemption of 12,061,041 shares of Class A common stock for $123,068,515.

After the redemption of the shares of Class A common stock, the Company’s controlling economic ownership percentage in Sky was 26.1%.

There are no pro forma adjustments related to the outstanding public warrants and private placement warrants issued in connection with the IPO that are classified as warrant liability in YAC’s historical balance sheet, as such securities continue to be outstanding and classified as a liability after the Closing Date.

The following table provides a pro forma summary of the shares of the Combined Company’s common stock that would be outstanding if the Transactions had occurred on December 31, 2021:

The Combined Company is organized in an “Up-C” structure. It was necessary to consider the income tax impacts and any related pro forma adjustments associated with the Transactions. No tax liability is deemed to have been triggered upon consummation of the Business Combination, including related to the Tax Receivable Agreement. The pro forma condensed combined provision for income taxes does not necessarily reflect the amounts that would have resulted had Sky and YAC filed income tax returns in the current structure for the periods presented.

The unaudited pro forma condensed combined financial information has been presented for illustrative purposes only. The pro forma adjustments represent estimates based on information available as of the date of the unaudited pro forma condensed combined financial information and are subject to change as additional information becomes available. Assumptions and estimates underlying the pro forma adjustments set forth in the unaudited pro forma condensed combined financial information are described in the accompanying notes. The actual financial position and results of operations of the Combined Company subsequent to the Transactions may differ significantly from the pro forma amounts reflected herein.

The Business Combination was accounted for as a reverse recapitalization in accordance with U.S. GAAP. Under this method of accounting, YAC was treated as the acquired company for financial reporting purposes, and Sky was treated as the accounting acquirer. The Business Combination was treated as the equivalent of Sky issuing stock for the net assets of YAC, accompanied by a recapitalization. The net assets of YAC are stated at historical cost, with no goodwill or intangible assets recorded. Operations prior to the Business Combination are those of Sky.

The unaudited pro forma condensed combined statement of operations for the year ended December 31, 2021 give pro forma effect to the Transactions as if they had occurred on January 1, 2021. The unaudited pro forma condensed combined balance sheet as of December 31, 2021 assumes that the Transactions were completed on December 31, 2021, excluding the IPO (which was completed on October 26, 2020).

The unaudited pro forma condensed combined financial information was derived from, and should be read in conjunction with, the following historical financial statements and notes thereto, and other information relating to Sky and YAC included elsewhere in this prospectus:

Management has made significant estimates and assumptions in its determination of the pro forma adjustments. The pro forma adjustments, which are described in the accompanying notes, may be revised as additional information becomes available and is evaluated. Therefore, it is likely that the actual adjustments will differ from the pro forma adjustments, and it is possible the differences may be material. Management believes that its assumptions and methodologies provide a reasonable basis for presenting all of the significant effects of the Transactions based on information available to management as of the date of the unaudited pro forma condensed combined financial information, and the pro forma adjustments give appropriate effect to those assumptions and are properly applied in the unaudited pro forma condensed combined financial information.

The unaudited pro forma condensed combined balance sheet as of December 31, 2021 includes the following adjustments:

The unaudited pro forma condensed combined statements of operations for the years ended December 31, 2021 and 2020 include the following adjustments:

On the Closing Date, we completed the previously announced business combination pursuant to the Equity Purchase Agreement between us and Sky. Each of the Existing Sky Equityholders separately entered into an Equityholders Voting and Support Agreement irrevocably agreeing to vote in favor of the business combination set forth in the Equity Purchase Agreement. As contemplated by the Equity Purchase Agreement, on the Closing Date the following occurred: (a) YAC changed its name to “Sky Harbour Group Corporation”; (b) all outstanding shares of Sponsor Stock held by the Sponsor were converted into shares of Class A Common Stock of the Company; (c) Sky restructured its capitalization, issued to the Company 14,937,581 Sky Common Units, which was equal to the number of outstanding shares of Class A Common Stock immediately after giving effect to the Business combination (taking into account the redemption of Class A Common Stock and the Class A Common Stock issued under the BOC PIPE (as defined below)), reclassified the existing Sky Common Units (other than the Sky Incentive Units), existing Sky Series A preferred units and the existing Sky Series B preferred units into Sky Common Units; (d) effected certain adjustments to the number of Sky Incentive Units to reflect the new capital structure; (e) appointed the Company as the managing member of Sky; (f) the Sky Common Units issued to BOC YAC in respect of its Series B preferred units were converted into 5,500,000 shares of Class A Common Stock; (h) holders of Sky Common Units received one share of Class B Common Stock for each Sky Common Unit, and as consideration for the issuance of 14,937,581 Sky Common Units by Sky to the Company, YAC contributed to Sky $46,262,048 consisting of the amount held in the YAC trust account after (i) deducting $123,068,515 required to fund the redemption of the Class A Common Stock held by eligible stockholders who properly elected to have their shares redeemed as of the Closing Date, (ii) taking into account the BOC PIPE and (iii) deducting $21,164,160 consisting of deferred underwriting commissions, transaction expenses, and the BOC Yellowstone LLC promissory note repayment; and (i) without any action on the part of any holder of YAC Warrants, each YAC Warrant that is issued and outstanding immediately prior to the closing became a Warrant (the transactions referred to in clauses (a) through (i), collectively, the “Business Combination”).

As a result of the Business Combination, the Company is organized as an “Up-C” structure in which substantially all of the operating assets of Sky’s business are held by Sky, and the Company’s only assets are its equity interests in Sky.

As of the open of trading on January 26, 2022, the Class A Common Stock and Warrants of the Company, formerly those of YAC, began trading on the NYSE American as “SKYH” and “SKYH WS,” respectively. The disclosure in this section gives effect to the Business Combination and includes the operations of Sky prior to the Business Combination.

We are an aviation infrastructure development company building the first nationwide network of Home-Basing Solutions (“HBS”) for business aircraft. We develop, lease and manage general aviation hangars across the United States, targeting airfields in markets with significant aircraft populations and high hangar demand. Our HBS campuses feature exclusive private hangars and a full suite of dedicated services specifically designed for home-based aircraft.

As the fleet of private jets in the United States continues to grow, with recent new aircraft deliveries exceeding retirements, demand for hangar space is at a premium in part because new jets require more square footage of hangar space and the pace of new hangar construction has lagged behind the demand. The cumulative square footage of the business aircraft fleet in the United States increased 42% between 2010 and 2020. Moreover, over that same period, there was a 70% increase in the square footage of larger private jets – those with greater than a 24-foot tail height. The larger footprint aircraft do not fit in much of the existing hangar infrastructure and impose stacking challenges and constraints in the traditional shared or community hangars operated by fixed-base operators (“FBO”). The addition of winglets (the vertical extensions on aircraft wingtips) on most modern business jets inhibits wing-over-wing storage. Aircraft hangars are in high demand and short supply, with some airports compiling waiting lists that can exceed several years.

Our scalable business strategy addresses the increased imbalance between the supply and demand for private jet storage, including the lack of hangar facilities able to accommodate larger aircraft, by growing our portfolio of HBS campuses at key airports across the United States. We target airports with excess demand for private hangar space, typically near metropolitan areas, which include both established and growing markets. We intend to capitalize on

the existing hangar supply constraints at major US airports by targeting high-end tenants in markets where there is a shortage of private and FBO hangar space, or where such hangars are or are becoming obsolete.

In contrast with community hangars and other facilities provided by FBOs, the HBS campuses we offer provide the following features and services:

We use a standard set of proprietary prototype hangar designs, which are intended to lower construction costs, minimize development risk, expedite permit issuance, and facilitate the implementation of refinements across its portfolio. Hangar features include:

Our product strategy aims to attract tenants with exclusive access to their aircraft, minimize the risk of damage to aircraft, provide increased access, security and control, facilitate maintenance, and improve pre-flight and post-flight convenience. We believe these products and services complement those of the FBO facilities.

We believe demand for HBS services will be driven broadly by the growing size of the business aviation fleet in the United States and the delivery of larger aircraft with taller tail heights. The discovery by first-time flyers in the convenience, control and comfort of general aviation has caused a shift in consumer behavior which we believe will also support increasing demand for HBS services.

While private aircraft use generally was not affected to the extent of commercial aviation, and some private aircraft clients may continue to use that mode of aviation following the pandemic, preferences for air travel and specifically general aviation are unknown and may change following COVID-19. See “Risk Factors – The aviation industry generally, and the business of Sky specifically, have been and may continue to be materially adversely affected by the global COVID-19 pandemic.”

On September 14, 2021, our wholly-owned subsidiary following the business combination, Sky Harbour Capital LLC (“SHC”), closed a $166.34 million financing through the sale of Series 2021 private activity tax-exempt senior bonds through a municipal conduit issuer, Public Finance Authority (Wisconsin) (the “PABs”). The bond issuance consisted of unrated senior fixed tax-exempt bonds with three term maturities (2036, 2041 and 2054) with an average life principal amortization of 24 years. The term bonds were priced to yield 3.80% (2036), 4.00% (2041) and 4.25% (2054). The use of proceeds from this issuance, together with proceeds from the sale of the $55 million of our Series B Preferred Units to BOC YAC, were used, in part, to fund a construction escrow account for Sky’s development program at five airports consisting of 8 existing hangars and 73 new hangars in various phases of development and construction located at Miami-Opa Locka Executive Airport, Sugar Land Regional Airport, Nashville International Airport, Centennial Airport and Phoenix Deer Valley Airport and to repay all existing indebtedness of Sky.

The PABs are obligations of all the operating subsidiaries of Sky Harbour Capital LLC, the borrower subsidiary of Sky. The PABs are senior secured obligations with a collateral package that includes the leasehold improvements, ground leases and tenant leases of Sky financed with such bonds. There are financial covenants that restrict the ability to make cash distributions to Sky and, thus, may limit the ability to distribute dividends in the future. Failure to meet financial and other covenants under the PABs master and bond indenture, if not cured, may lead to an acceleration of the debt and foreclosure on Sky’s main operating assets.

We seek to develop our HBS hangar campuses on long-term ground leases (or sub-leases thereof) at airports with suitable infrastructure serving metropolitan centers across the United States.

We currently maintain our executive office at 136 Tower Road, Suite 205, Westchester County Airport, White Plains, NY 10604 under a lease agreement. We consider our current office space adequate for our current operations.

The table below presents certain information with respect to our portfolio as of December 31, 2021. We lease each of our properties under long-term ground leases.

Our current facilities include seven constructed hangars at the Sugar Land site and an existing hangar facility at the Nashville site, which amount to approximately 66,000 square feet and 27,000 square feet, respectively, of rentable space. In addition, we have improvements in construction at the Nashville and Miami Opa-Locka sites, and facilities that are not yet constructed, including proposed improvements at the Sugar Land, Centennial and Deer Valley sites.

Each facility is expected to consist of clusters of between nine and 22 hangars. On average, each hangar provides 12,000 square feet of hangar space and 1,300 to 2,000 square feet of office space. Once completed, the facilities are expected to total 78 hangars on 81 acres of ground leases, with an infrastructure of over 980,000 square feet expected to be completed in the next five years.

We intend to lease each respective facility to one or more tenants, who will use all or a portion of such facility for general aviation aircraft storage and related uses permitted under the respective ground leases and will pay rent and other charges derived from HBS activity on the respective sites to us pursuant to a sublease.

The Airport. Sugar Land Regional Airport (“SGR”) is located approximately 20 miles southwest of the Houston central business district. The airport is owned by the City of Sugar Land and is situated on 622 acres. SGR is a publicly-owned, public-use general aviation facility, and it is included in the Federal Aviation Administration’s (“FAA”) National Plan of Integrated Airport Systems (“NPAIS”).

SGR is designated as a “reliever airport” for George Bush Intercontinental Airport (“IAH”) and William P. Hobby International Airport (“HOU”) in Houston. Twenty-four companies on the 2021 Fortune 500 list are headquartered in the Houston metro area.

According to the 2018 Texas Aviation Economic Impact Study, a significant portion of SGR activity is attributable to itinerant operations by business jet aircraft. SGR is home to seven on-airport businesses that offer services such as FBO amenities, aircraft maintenance, and avionics. The most frequent general aviation operations at SGR involve business and charter flights, flight instruction, recreational flying and law enforcement.

Sugar Land Site Facilities. The total development will consist of 13 individually leased NFPA Group III hangars, with a combined leasable area of 122,660 square feet situated within three buildings. The first phase is divided into seven private hangars, which were completed in December 2020. The second phase plans to include six private hangars. All hangars feature 28’-high doors and include 480-, 240- and 120-volt electrical outlets to allow for routine maintenance. The Sugar Land ground lease provides that, if construction of the second phase is not commenced by October 15, 2022, the ground lease with parcels comprising the second phase project site will automatically terminate.

Sugar Land Facilities Construction Project. The total cost of the Sugar Land facilities is estimated to be approximately $23.8 million, of which $15.1 million is the recently completed facilities and $8.7 million is the expected cost of the facilities in the second phase.

Sugar Land Tenant Leases/LOIs. Currently, the Sugar Land development has one executed lease, comprising approximately 43% of the first phase leasable area. The lease commenced December 3, 2020 for a five-year term. The remaining hangar units currently are being marketed for lease.

General Airport Facilities. General airport facilities at SGR include an 8,000-foot primary runway, as well as fuel services, aircraft storage in hangars, and tie-down parking. SGR includes United States Customs facilities.

Based Aircraft. The following table shows based aircraft data at SGR:

Aircraft Operations. Between 2018 and 2019, SGR experienced a 10.07% increase in overall operations. Total general aviation operations increased 3.36%, and local civil operations increased 25.24%. The effects of the COVID-19 pandemic can be seen in the change from 2019 to 2020: total operations at SGR decreased 10.75%, general aviation declined 14.10%, and civil operations declined 4.51%. The significant increase in projected operations from 2020 to 2021 is largely attributable to the fact that the FAA Terminal Area Forecast (“TAF”) forward-looking data was produced prior to the pandemic, and does not consider its ongoing effects. As illustrated in the table on the following page, growth is projected in overall operations through 2037.

Regional Airport Competition. Within a 30-mile radius from SGR, there are five alternate locations accommodating business jet service and offering a minimum runway length of 5,000 feet, as described in the following paragraphs.

Houston Hobby Airport (“HOU”) is a commercial and general aviation airport located approximately seven miles southeast of downtown Houston. Currently, 12 commercial airlines serve HOU, and it is Houston’s second busiest airport, after IAH, ranked 34th in the nation for pass