Exhibit 3.1

FOURTH AMENDMENT

TO THE

AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION

OF

INTEGRAL ACQUISITION CORPORATION 1

March 28, 2025

Integral Acquisition Corporation 1, a corporation organized and existing under the laws of the State of Delaware (the “Corporation”), DOES HEREBY CERTIFY AS FOLLOWS:

1.  The name of the Corporation is “Integral Acquisition Corporation 1.” The original Certificate of Incorporation of the Corporation was filed with the Secretary of State of the State of Delaware on February 16, 2021. The Amended and Restated Certificate of Incorporation was filed with the Secretary of State of the State of Delaware on November 3, 2021, an Amendment to the Amended and Restated Certificate of Incorporation was filed with the Secretary of State of the State of Delaware on May 3, 2023, a Second Amendment to the Amended and Restated Certificate of Incorporation was filed with the Secretary of State of the State of Delaware on November 2, 2023, and a Third Amendment to the Amended and Restated Certificate of Incorporation was filed with the Secretary of State of the State of Delaware on November 1, 2024 (as amended, the “Amended and Restated Certificate”).

2.  This Fourth Amendment to the Amended and Restated Certificate of Incorporation amends the Amended and Restated Certificate.

3.  This Fourth Amendment to the Amended and Restated Certificate of Incorporation was duly adopted by the Board of Directors of the Corporation and the holders of at least sixty-five percent (65%) of the outstanding shares of the common stock of the Corporation in accordance with Section 242 of the General Corporation Law of the State of Delaware.

4.  The text of Section 9.2(a) is hereby amended and restated to read in full as follows:

(a)  Prior to the consummation of the initial Business Combination, the Corporation shall provide all holders of Offering Shares with the opportunity to have their Offering Shares redeemed upon the consummation of the initial Business Combination pursuant to, and subject to the limitations of, Sections 9.2(b) and 9.2(c) (such rights of such holders to have their Offering Shares redeemed pursuant to such Sections, the “Redemption Rights”) hereof for cash equal to the applicable redemption price per share determined in accordance with Section 9.2(b) hereof (the “Redemption Price”). Notwithstanding anything to the contrary contained in this Amended and Restated Certificate, there shall be no Redemption Rights or liquidating distributions with respect to any warrant issued pursuant to the Offering.

5.  The text of Section 9.2(e) is hereby amended and restated to read in full as follows:

(e)  If the Corporation offers to redeem the Offering Shares in conjunction with a stockholder vote on an initial Business Combination, the Corporation shall consummate the proposed initial Business Combination only if such initial Business Combination is approved by the affirmative vote of the holders of a majority of the shares of the Common Stock that are voted at a stockholder meeting held to consider such initial Business Combination.

6.  The text of Section 9.2(f) is hereby deleted in its entirety.

7.  The text of Section 9.7 is hereby amended and restated to read in full as follows:

Section 9.7  Additional Redemption Rights. If, in accordance with Section 9.1(a), any amendment is made to this Amended and Restated Certificate (a) to modify the substance or timing of the Corporation’s obligation to provide for the redemption of the Offering Shares in connection with an initial Business Combination or to redeem 100% of the Offering Shares if the Corporation has not consummated an initial Business Combination within 18 months from the date of the closing of the Offering or (b) with respect to any other material provisions of this Amended and Restated Certificate relating to stockholders’ rights or pre-initial

Business Combination activity, the Public Stockholders shall be provided with the opportunity to redeem their Offering Shares upon the approval of any such amendment, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including interest not previously released to the Corporation to pay its taxes, divided by the number of then outstanding Offering Shares.

IN WITNESS WHEREOF, Integral Acquisition Corporation 1 has caused this Amendment to the Amended and Restated Certificate of Incorporation to be duly executed in its name and on its behalf by an authorized officer as of the date first set above.