MOBIX LABS, INC

As filed with the Securities and Exchange Commission on October 30, 2026

Registration No. 333-

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORMS-1

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

(Exact name of registrant as specified in its charter)

1 Venture, Suite 220

Irvine, California 92618

(949) 808-8888

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Keyvan Samini

President and Chief Financial Officer

1 Venture, Suite 220

Irvine, California 92618

(949) 808-8888

(Address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Raymond Lee, Esq.

Laurie L. Green, Esq.

Greenberg Traurig, LLP

18565 Jamboree Road

Suite 500

Irvine, CA 92612

(949) 732-6510

Approximate date of commencement of proposed sale to the public:From time to time after this registration statement becomes effective.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, check the following box. ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

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 7(a)(2)(B) of the Securities Act ☐

The Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the Registration Statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.

SUBJECT TO COMPLETION, DATED OCTOBER 30, 2026

The information in this prospectus is not complete and may be changed. These securities may not be sold until the registration statement filed with the SEC is effective. This prospectus is not an offer to sell these securities and is not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

PRELIMINARY PROSPECTUS

mobix labs, inc.

6,000,000 SHARES OF CLASS A COMMON STOCK

This prospectus relates to the registration of the resale or other distribution by the selling stockholder named herein (the “Selling Stockholder”) of up to 6,000,000 shares of Class A Common Stock of Mobix Labs, Inc., par value $0.00001 per share (the “Class A Common Stock”), issuable to an investor upon the conversion of (i) 241 shares of Series A 10% Convertible Preferred Stock and (ii) 9,800 shares of Series A 10% Convertible Preferred Stock issuable upon the exercise of Preferred Stock Purchase Warrants (the “Preferred Warrants”). The 241 shares of Series A 10% Convertible Preferred Stock issued and the 9,800 shares of Series A 10% Convertible Preferred Stock underlying the Preferred Warrants, including any future shares issued as a dividend on the Series A 10% Convertible Preferred Stock, are hereinafter referred to as the “Preferred Shares”.

The shares of Class A Common Stock that may be sold by the Selling Stockholder are collectively referred to in this prospectus as the “Offered Securities.” Our registration of the resale of the Offered Securities does not mean that the Selling Stockholder will offer or sell any of the Offered Securities.

We will not receive any of the proceeds from the sale by the Selling Stockholder of any of the Offered Securities. We may receive up to $9,800,000 to the extent the Preferred Warrants are exercised. We intend to use any proceeds from the exercise of the Preferred Warrants for working capital and general corporate purposes. We will bear all costs, expenses and fees in connection with the registration of the resale of the Offered Securities. The Selling Stockholder will bear all commissions and discounts, if any, attributable to their respective sales of the Offered Securities.

The Offered Securities offered for resale in this prospectus represent a substantial percentage of the total outstanding shares of our Class A Common Stock as of October 14, 2026. Assuming the issuance of all of the Offered Securities being registered for resale pursuant to this prospectus to the Selling Stockholder, the Offered Securities would represent approximately 20.3% of the outstanding Class A Common Stock as of October 14, 2026. The resale of the Offered Securities, or the perception that these sales could occur, pursuant to this prospectus, could result in a significant decline in the public trading price of our Class A Common Stock. In addition to the Selling Stockholder, certain other stockholders may resell a substantial number of our securities pursuant to separate resale prospectuses. The sale of the shares offered hereby together with the sale of these additional securities, or the perception that these sales could occur, could depress the market price of our securities.

The Selling Stockholder may offer and sell the securities covered by this prospectus in a number of different ways and at varying prices. We provide more information about how the Selling Stockholder may sell the securities in the section titled “Plan of Distribution.”

Sales of a substantial number of shares of Class A Common Stock in the public markets, including by the Selling Stockholder, who obtained their shares at prices or values below the current market price, or the perception in the market that such sales could occur, could result in a significant decline in the public trading price of the Class A Common Stock.

You should carefully read this prospectus, and any applicable prospectus supplement, before you invest in any of our securities.

The shares of Class A Common Stock are listed on Nasdaq Stock Market LLC (“Nasdaq”) and our public warrants (the “Public Warrants”) are listed on Nasdaq under the symbols “MOBX” and “MOBXW,” respectively. On October 29, 2026, the last closing price of the Class A Common Stock as reported on Nasdaq was $0.75 per share.

We are a “smaller reporting company” as defined under the federal securities laws and, as such, have elected to comply with certain reduced public company reporting requirements for this prospectus and may elect to do so in future filings. See “Implications of Being a Smaller Reporting Company.”

Investing in our securities involves risks. You should carefully read and consider the risk factors included in our periodic reports filed with the Securities and Exchange Commission (the “SEC”), in any applicable prospectus supplement relating to a specific offering of securities and in any other documents we file with the SEC. See the section entitled “Risk Factors” on page 4 of this prospectus, in our other filings with the SEC and in the applicable prospectus supplement.

Neither the SEC nor any state securities commission has approved or disapproved of these securities, or determined if this prospectus or any prospectus supplement is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is , 2026.

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