Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We have issued our report dated December 30, 2024, with respect to the consolidated financial statements of Innovative Solutions & Support Inc. included in the Annual Report on Form 10-K for the year ended September 30, 2024, which is incorporated by reference in this Registration Statement. We consent to the incorporation by reference of the aforementioned report in this Registration Statement, and to the use of our name as it appears under the caption “Experts”.

/s/ GRANT THORNTON LLP

Philadelphia, Pennsylvania
October 14, 2025