TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number:1-6311 Tidewater Inc. (Exact name of registrant as specified in its charter) 72-0487776(I.R.S. Employer Identification No.) Delaware(State or other jurisdiction of incorporation) 842 West Sam Houston Parkway North, Suite 400Houston, Texas77024(Address of principal executive offices) (Zip code)(713) 470-5300Registrant’s telephone number, including area code Not Applicable(Former name, former address and former fiscal year, if changed since last report) Securities registered pursuant to Section 12(b) of the Act: Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section13 or 15(d) of the SecuritiesExchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports),and (2) has been subject to such filing requirements for the past 90 days.Yes☒No☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuantto Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrantwas required to submit such files).Yes☒No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer,a smaller reportingcompany, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reportingcompany,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. Large accelerated filer☒Non-accelerated filer☐Emerging Growth Company☐ Accelerated filer☐Smaller reporting company☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period forcomplying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).Yes☐No☒ 49,756,231shares of Tidewater Inc. common stock $0.001 par value per share were outstanding on July 31, 2026. Table of Contents PART I ITEM1.FINANCIAL STATEMENTSCONDENSED CONSOLIDATED BALANCE SHEETSCONDENSED CONSOLIDATED INCOME STATEMENTSCONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOMECONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWSCONDENSED CONSOLIDATED STATEMENTS OF EQUITYNOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTSITEM 2.MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OFOPERATIONSITEM 3.QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISKITEM 4.CONTROLS AND PROCEDURES PART II ITEM1.LEGAL PROCEEDINGSITEM1A.RISK FACTORSITEM 2.UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDSITEM 5.OTHER INFORMATIONITEM 6.EXHIBITS PART I.FINANCIAL INFORMATION ITEM 1.FINANCIAL STATEMENTS TIDEWATER INC.CONDENSED CONSOLIDATED BALANCE SHEETS(Unaudited) (In Thousands, except share and par value data) June 30, 2026December 31, 2025 (Unaudited)(In Thousands, except per share data) (Unaudited)(In Thousands) TIDEWATER INC. (Unaudited)(In Thousands) Cash, cash equivalents and restricted cash atJune 30, 2026 includes $2.5million in long-term restricted cash, which is included in otherassets in our Condensed Consolidated Balance Sheet. The accompanying notes are an integral part of these Condensed Consolidated Financial Statements. (Unaudited)(In Thousands) (1)INTERIM FINANCIAL STATEMENTS The accompanying unaudited Condensed Consolidated Financial Statements reflect the financial position, results of operations,comprehensive income, cash flows, and changes in stockholders’ equity of Tidewater Inc., a Delaware corporation, and its consolidatedsubsidiaries, collectively referred to as the “company”, “Tidewater”, “we”, “our”, or “us”. The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with United States(U.S.) generally accepted accounting principles (GAAP) for interim financial information andpursuant to the rules and regulations ofthe Securities and Exchange Commission (SEC) for interim financial information. Accordingly, certain information and disclosuresnormally included in our annual financial statements have been condensed or omitted. These unaudited Condensed ConsolidatedFinancial Statements should be read in conjunction with the audited Consolidated Financial Statements and notes thereto included inour Annual Report on Form 10-K for the year ended December 31, 2025, filed with the SEC on March 2, 2026. In the opinion ofmanagement, the accompanying financial information reflects all normal recurring adjustments necessary to fairly state our results ofoperations, financial position and cash flows for the periods presented and are not indicative of the results that may be expected for afull year. Our fin