创新软件 2025年度报告

☒ANNUAL REPORT PURSUANT TO SECTION13 OR 15(d)OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended September30, 2025OR☐TRANSITION REPORT PURSUANT TO SECTION13 OR 15(d)OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period fromto.Commission File No.001-41503 INNOVATIVE SOLUTIONS AND SUPPORT,INC.(Exact name of registrant as specified in its charter) 19341(Zip Code) (610)646-9800(Registrant’s telephone number, including area code) Securities registered pursuant to Section12(b)of the Act: NameofeachexchangeonwhichregisteredNasdaq Stock Market, LLC Securities registered pursuant to Section12(g)of the Act: None Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule405 of the Securities Act. Yes☐No☒ Indicate by check mark if the registrant is not required to file reports pursuant to Section13 or Section15(d)of the Act. Yes☐No☒ Indicate by check mark whether the registrant (1)has filed all reports required to be filed by Section13 or 15(d)of the Securities Exchange Act of 1934during the preceding 12months (or for such shorter period that the registrant was required to file such reports), and (2)has been subject to such filingrequirements for the past 90days. Yes☒No☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule405 ofRegulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit suchfiles). Yes☒No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or anemerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growthcompany” in Rule 12b-2 of the Exchange Act. Accelerated filer☐Smaller reporting company☒Emerging growth company☐ Large accelerated filer☐Non-accelerated filer☒ 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 newor revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internalcontrol over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm thatprepared or issued its audit report.☐ If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in thefiling reflect the correction of an error to previously issued financial statements.☐ Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensationreceived by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b).☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule12b-2 of the Act). Yes☐No☒ The aggregate market value of the registrant’s common stock held by non-affiliates of the registrant as of March 31, 2025 (the last business day of theregistrant’s most recently completed second quarter) was approximately $81.8 million (based on the closing sale price of the registrant’s common stockon the Nasdaq Stock Market on such date). Shares of common stock held by each executive officer and director and by each person who owns 10% ormore of the registrant’s outstanding common stock have been excluded since such persons may be deemed affiliates. This determination of affiliate statusis not necessarily a conclusive determination for other purposes.As of January 12, 2026, there were 17,778,343 outstanding shares of the registrant’s common stock. Documents Incorporated by Reference See “Explanatory Note” below; Auditor Name GRANT THORNTON LLP Auditor Firm ID 248 Auditor Location Philadelphia, Pennsylvania EXPLANATORY NOTE Innovative Solutions and Support, Inc.dba Innovative Aerosystems and its subsidiaries is filing this Amendment No. 1 on Form 10-K/A(this “Amendment No. 1”) to our Annual Report on Form 10-K for the fiscal year ended September 30, 2025 (the “Form 10-K”), which was filedwith the U.S. Securities and Exchange Commission (the “SEC”) on December 23, 2025, to provide the information required by Part III of Form 10-K. This information was previously omitted from the Form 10-K in reliance on General Instruction G(3) to Form 10-K, which permits theinformation in Part III to be incorporated in the Form 10-K by reference from our definitive proxy statement (such definitive proxy statement, whenfiled, the “Proxy Statement”) if such Proxy Statement is filed no later than 120 days after end of our fiscal year. We are filing this