UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):  January 18, 2014

INNOVATIVE SOLUTIONS AND SUPPORT, INC.

(Exact name of registrant as specified in its charter)

720 Pennsylvania Drive

Exton, Pennsylvania 19341

(Address of principal executive offices) (Zip Code)

(610) 646-9800

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 4.01      Changes in Registrant’s Certifying Accountant.

As previously reported in a report on Form 8-K filed with the Securities Exchange Commission on January 8, 2014, effective January 2, 2014, the Audit Committee of the Board of Directors (the “Audit Committee”) of Innovative Solutions and Support, Inc. (the “Company”) voted unanimously to dismiss Deloitte & Touche LLP as the Company’s independent registered public accounting firm.

The Audit Committee completed a competitive process to select the Company’s independent registered public accounting firm for the fiscal year ending September 30, 2014.  Effective January 18, 2014, the Audit Committee voted unanimously to approve the appointment of Grant Thornton LLP as its new independent registered public accounting firm for the fiscal year ending September 30, 2014.

During the Company’s two most recent fiscal years and the subsequent interim period through January 18, 2014, neither the Company nor anyone acting on its behalf has consulted with Grant Thornton LLP regarding either: (i) the application of accounting principles to a specified transaction, either completed or proposed, or the type of audit opinion that might be rendered on our financial statements; or (ii) any matter that was either the subject of a disagreement (as defined in Item 304(a)(1)(iv) of Regulation S-K and the related instructions to that Item) or a reportable event (as described in Item 304(a)(i)(v) of Regulation S-K).

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SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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