Innovative Solutions and Support shareholders approve charter amendment; director Churchill fails re-election

On April 17, 2023, following the approval of a proposed amendment to the Amended and Restated Articles of Incorporation (the “ Charter ”) of Innovative Solutions and Support, Inc. (the “ Company ”) by the Company’s shareholders at the Company’s 2023 Annual Meeting of Shareholders (the “ Annual Meeting ”), as further described in the Company’s Proxy Statement on Schedule 14A, which was filed with the U.S. Securities and Exchange Commission on February 24, 2023 (such amendment, the “ Amendment ” and such Proxy Statement, the “ Proxy Statement ”), the Company filed Articles of Amendment with the Department of State of the Commonwealth of Pennsylvania (the “ Department ”) in order to give effect to the Amendment.

Advisory Vote on Executive Compensation (Say-On-Pay) The Company’s shareholders approved the resolution

Name For Withheld Broker Non-Votes Shahram Askarpour 13,980,798 488,651 2,054,014 Roger A. Carolin 7,870,550 6,598,899 2,054,014 Glen R. Bressner 10,232,070 4,237,379 2,054,014 Stephen L. Belland 10,284,422 4,185,027 2,054,014 Parizad Olver (Parchi) 10,435,419 4,034,030 2,054,014 Mr. Winston J. Churchill did not receive a majority of the votes cast

The Company’s shareholders ratified and approved the appointment of Grant Thornton LLP as the Company’s Independent Registered Public Accounting Firm for the Fiscal Year Ending September 30, 2023 as follows: For Against Abstain Broker Non-Votes 16,465,038 31,286 27,139 0

The Amendment received the required vote of 65% of the Company’s issued and outstanding shares and was therefore approved by the Company’s shareholders as follows: For Against Abstain Broker Non-Votes 11,556,358 2,894,310 18,781 2,054,014