Prospectus Filed Pursuant to Rule 424(b)(3) (424b3)

Filed Pursuant to Rule 424(b)(3)
Registration Statement No. 333-228029

Prospectus Supplement No. 6

to Prospectus dated March 4, 2019

Tidewater Inc.

3,434,934 Shares of Common Stock

Issuable upon the Exercise of Outstanding GLF Warrants

This Prospectus Supplement No. 6 (the “prospectus supplement”) updates, amends and supplements the prospectus dated March 4, 2019 (the “Prospectus”), as amended and supplemented by the Prospectus Supplement No. 1 dated May 10, 2019, the Prospectus Supplement No. 2 dated August 13, 2019, the Prospectus Supplement No. 3 dated September 4, 2019, the Prospectus Supplement No. 4 dated September 27, 2019 and the Prospectus Supplement No. 5 dated October 31, 2019, which forms a part of our Registration Statement on Form S-1 (Registration No. 333-228029), as amended. Capitalized terms used in this prospectus supplement and not otherwise defined herein have the meanings specified in the Prospectus.

This prospectus supplement updates, amends and supplements the information included in the Prospectus with information contained in our Current Report on Form 8-K, filed with the Securities and Exchange Commission on November 6, 2019, which is set forth below.

This prospectus supplement is not complete without the Prospectus, as amended and supplemented. This prospectus supplement should be read in conjunction with the Prospectus, as amended and supplemented, which is to be delivered with this prospectus supplement, and is qualified by reference thereto, except to the extent that the information in this prospectus supplement updates or supersedes the information contained in the Prospectus, including any amendments and supplements thereto. Please keep this prospectus supplement with your Prospectus for future reference.

Our Common Stock is listed on the NYSE under the symbol “TDW.” On November 6, 2019, the last reported closing sale price of our Common Stock on the NYSE was $17.13.

Holding shares of our Common Stock involves risks that are described in the “Risk Factors” section beginning on page 4 of the Prospectus and “Risk Factors” in the documents incorporated by reference therein.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

The date of this prospectus supplement is November 7, 2019

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): November 3, 2019

TIDEWATER INC.

(Exact name of registrant as specified in its charter)


Delaware	1-6311	72-0487776
(State of incorporation)	(Commission File Number)	(IRS Employer Identification No.)

6002 Rogerdale Road, Suite 600 Houston, Texas		77072
(Address of principal executive offices)		(Zip Code)

(713) 470-5300

(Registrant’s telephone number, including area code)

N/A

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:


Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common stock, $0.001 par value per share	TDW	New York Stock Exchange
Series A Warrants to purchase shares of common stock	TDW.WS.A	New York Stock Exchange
Series B Warrants to purchase shares of common stock	TDW.WS.B	New York Stock Exchange
Warrants to purchase shares of common stock	TDW.WS	NYSE American

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

(b) On November 3, 2019, Alan J. Carr, a member of the board of directors (the “Board”) of Tidewater Inc. informed the Board that he was stepping down from the Board, effective immediately. Subsequently, on November 5, 2019, the Board approved a decrease in its size from eight to seven members, effective immediately.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.