UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 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): February 24, 2026

Incannex Healthcare Inc.

(Exact name of registrant as specified in its charter)

Registrant’s Telephone Number, including Area Code: +61 409 840 786

(Former Name or Former Address, if Changed Since Last Report): Not Applicable

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:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter)

Emerging growth company ☒

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 new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 3.03 Material Modifications to Rights of Security Holders.

To the extent required by Item 3.03, the disclosure set forth in Item 5.03 is incorporated herein by reference.

Item 5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.

On February 24, 2026, Incannex Healthcare Inc. (the “Company”) filed with the Secretary of State of the State of Delaware an amendment (the “Certificate of Amendment”) to its amended and restated certificate of incorporation, as amended (the “Certificate of Incorporation”), to effect a reverse stock split of the Company’s common stock, par value $0.0001 per share (the “Common Stock”), at a ratio of 1-for-30 (the “Reverse Stock Split”). Pursuant to the Certificate of Amendment, the Reverse Stock Split will become effective as of 4:01 p.m. Eastern Time on February 26, 2026 (the “Effective Time”) and shares of the Company’s Common Stock are expected to begin trading on a post-split basis at the open of trading on The Nasdaq Capital Market on February 27, 2026. At the Effective Time, every thirty (30) shares of the Company’s issued and outstanding shares of Common Stock will be automatically converted into one (1) share of Common Stock, without any change in the par value per share. In addition, proportionate adjustments will be made to the per share exercise price and the number of shares issuable upon the exercise of all outstanding equity awards, and to the number of shares issued and issuable under the Company’s stock incentive plans. No change will be made to the number of shares of Common Stock authorized under the Certificate of Incorporation. No fractional shares will be issued in connection with the Reverse Stock Split. Stockholders of record who otherwise would be entitled to receive fractional shares because they hold a number of shares not evenly divisible by the Reverse Stock Split ratio will automatically be entitled to receive an additional fraction of a share of Common Stock to round up to the next whole share. With respect to outstanding Common Stock held in “street name” through a bank, broker or other nominee, fractional shares will be rounded up at the participant level. Cash will not be paid for fractional shares.

Following the Reverse Stock Split, the shares of Common Stock will continue to trade on The Nasdaq Capital Market under the symbol “IXHL.” The new CUSIP number for the Common Stock following the Reverse Stock Split will be 45333F 208.

The summary of the Certificate of Amendment contained herein does not purport to be complete and is qualified in its entirety by reference to the full text of the Certificate of Amendment, a copy of which is attached as Exhibit 3.1 of this Current Report on Form 8-K and incorporated herein by reference.

Item 8.01 Other Information.

On February 25, 2026, the Company issued a press release announcing the Reverse Stock Split. The press release is filed as Exhibit 99.1 and incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

SIGNATURES

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 hereunto duly authorized.

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