☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACTOF 1934 For the quarterly period endedMarch 31,2025Or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACTOF 1934 For the transition period fromto.Commission file number:000-50865 MannKind Corporation(Exact name of registrant as specified in its charter) Delaware13-3607736(State or other jurisdiction ofincorporation or organization)(I.R.S. EmployerIdentification No.) 1 Casper StreetDanbury,Connecticut(Address of principal executive offices) 06810(Zip Code) (818)661-5000(Registrant’s telephone number, including area code)N/A(Former name, former address and former fiscal year, if changed since last report)Securities registered pursuant to Section 12(b) of the Act: Title of each classTradingSymbol(s)Name of each exchange on which registeredCommon Stock, par value $0.01 per shareMNKDThe Nasdaq Stock Market LLC Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 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 suchreports), 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 submittedpursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period thatthe registrant was 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 smallerreporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smallerreporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. Large accelerated filer☒ Accelerated filer☐Smaller reporting company☐Emerging growth company☐ Non-accelerated filer☐ 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☒ As of April 25, 2025, there were303,932,852shares of the registrant’s common stock, $0.01 par value per share, outstanding. MANNKIND CORPORATION Form 10-Q For the Quarterly Period Ended March 31, 2025 TABLE OF CONTENTS PART I: FINANCIAL INFORMATION Item 1. Financial Statements (Unaudited)Condensed Consolidated Statements of Operations: Three months ended March 31, 2025 and 2024Condensed Consolidated Statements of Comprehensive Income: Three months ended March 31, 2025 and 2024Condensed Consolidated Balance Sheets: March 31, 2025 and December 31, 2024Condensed Consolidated Statements of Stockholders’ Deficit:Three months ended March 31, 2025 and 2024Condensed Consolidated Statements of Cash Flows: Three months ended March 31, 2025 and 2024Notes to Condensed Consolidated Financial StatementsItem 2. Management’s Discussion and Analysis of Financial Condition and Results of OperationsItem 3. Quantitative and Qualitative Disclosures About Market RiskItem 4. Controls and Procedures PART II: OTHER INFORMATION Item 1. Legal ProceedingsItem 1A. Risk FactorsItem 2. Unregistered Sales of Equity Securities and Use of ProceedsItem 3. Defaults Upon Senior SecuritiesItem 4. Mine Safety DisclosuresItem 5. Other InformationItem 6. ExhibitsSIGNATURES PART 1: FINANCIAL INFORMATIONITEM 1. FINANCIAL STATEMENTSMANNKIND CORPORATION AND SUBSIDIARIESCONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS(Unaudited) MANNKIND CORPORATION AND SUBSIDIARIESCONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME(Unaudited) MANNKIND CORPORATION AND SUBSIDIARIESCONDENSED CONSOLIDATED BALANCE SHEETS(Unaudited) MANNKIND CORPORATION AND SUBSIDIARIESCONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ DEFICIT(Unaudited) MANNKIND CORPORATION AND SUBSIDIARIESCONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS(Unaudited) MANNKIND CORPORATION AND SUBSIDIARIESNOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS(Unaudited) 1. Description of Business and Significant Accounting Policies The unaudited condensed consolidated financial statements of MannKind Corporation and its subsidiaries (“MannKind,” the“Company,” “we” or “us”), have been prepared in accordance with generally accepted accounting principles in the United States ofAmerica (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X ofthe Securities and Exchange Commission (the “SEC”). Accordingly, they do not include all of the information and footnotesrequired by GAAP for complete financial statements. The information included in thi