FORM 12b-25
SEC File Number 001-13387
CUSIP Number: 007737109
(Check One):
[   ] Form 10-K     [_]  Form 20-F     [_] Form 11-K     [ X ] Form 10-Q     [_] Form 10-D [_] Form N-CEN
[_] Form N-CSR
For Period Ended: March 31, 2021
[  ] Transition Report on Form 10-K
[  ] Transition Report on Form 20-F
[  ] Transition Report on Form 11-K
[  ] Transition Report on Form 10-Q
If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates:  N/A
Part I--Registrant Information
          Full Name of Registrant:           AEROCENTURY CORP.
          Former Name if Applicable:
          Address of Principal Executive Office (Street and Number):  1440 CHAPIN AVENUE, SUITE 310 BURLINGAME CA 94010
Part II--Rules 12b-25(b) and (c)
If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12(b)-25(b), the following should be completed.   (Check box if appropriate)
The reason described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense;

The subject annual report, semi-annual report, transition report on Form 10-K, Form 20-F, Form 11-K, Form N-CEN or Form N-CSR, or portion thereof, will be filed on or before the
fifteenth calendar day following the prescribed due date; or the subject quarterly report or transition report on Form 10-Q or subject distribution report on Form 10-D, or portion
thereof, will be filed on or before the fifth calendar day following the prescribed due date; and
The accountant's statement or other exhibit required by Rule 12b-25(c) has been attached if applicable.

Part III--Narrative
State below in reasonable detail the reasons why Forms 10-K, 20-F, 11-K, 10-Q, 10-D, N-CEN, N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period.
The Registrant is unable to file its Quarterly Report on Form 10-Q within the prescribed time period because (i) the preparation for the filing of the voluntary petition for relief under Chapter 11 of Title 11 of the United States Code in the United States Bankruptcy Court for the District of Delaware on March 29, 2021, and (ii) following the filing of the Chapter 11 petition, the determination of the proper application of accounting principles with respect to the Company’s post-filing financial results, required a dedication of Registrant personnel and resources that precluded the Registrant from timely completing the preparation and coordination of its financial statements for the reporting period by the Registrant’s auditors.
Part IV--Other Information
    (1) Name and telephone number of person to contact in regard to this notification:  Timothy Harris, Esq. (650)-813-5784
(2) Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed?  If the answer is no, identify report(s).

[X ] Yes   [   ] No

(3) Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof?

[ X ] Yes   [  ] No
If so; attach an explanation of the anticipated change, both narratively and quantitively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made.
The registrant anticipates that the unaudited results of operations for the fiscal quarter ended March 31, 2021 will reflect a pre-tax loss of approximately $3.4 million and an after-tax loss of approximately $3.5 million, whereas results of operations for the fiscal quarter ended March 31, 2020 reflected a pre-tax loss of approximately $12.9 million and an after-tax loss of approximately $10.2 million. The decreased losses in the first quarter of 2021 resulted mostly from lower interest expense, asset impairments and depreciation compared to the same quarter in 2020, the effects of which were partially offset by an increase in professional fees, general and administrative expenses in the 2021 period.
(Name of Registrant as specified in charter)
has caused this notification to be signed on its behalf by the undersigned thereunto duly authorized.
Date:  May 17, 2021
By:  /s/ Harold M. Lyons
Harold M. Lyons,
SVP Finance and CFO
Aerocentury (AMEX:ACY)
Historical Stock Chart
From Aug 2021 to Sep 2021 Click Here for more Aerocentury Charts.
Aerocentury (AMEX:ACY)
Historical Stock Chart
From Sep 2020 to Sep 2021 Click Here for more Aerocentury Charts.