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 27, 2026

MOBIX LABS, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (949) 808-8888

N/A

(Former name or former address, if changed since last report)

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 5.03 Amendments to Articles of Incorporation or Bylaws.

On February 27, 2026, the board of directors of Mobix Labs, Inc. (the “Company”) approved an amendment and restatement of the Company’s bylaws (the “Bylaws”) effective as of the date of the board’s approval. The amendment of the Bylaws reduces the quorum requirement for all meetings of stockholders (unless otherwise provided by statute, the Company’s amended and restated certificate of incorporation or regulations of any stock exchange applicable to the Company) from the presence, in person or by proxy, of a majority in voting power of the then outstanding shares of stock entitled to vote to the presence, in person or by proxy, of one-third of the voting power of the outstanding shares of stock entitled to vote.

The foregoing description of the Bylaws, as amended, does not purport to be complete and is qualified in its entirety by reference to the full text of the Bylaws, as amended. A complete copy of the Bylaws, including the language added by the amendment to Bylaws appearing in Section 1.5, is attached to this report as Exhibit 3.1.

Item 9.01 Financial Statements and Exhibits.

The following exhibits are filed with this report:

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.