UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or Section 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 5, 2026

T3 DEFENSE INC.
(Exact name of registrant as specified in its charter)

575 Fifth Avenue, 14^th Floor

New York, New York 10017

(Address of principal executive offices)

212-791-4663

(Registrant’s telephone number, including area code)

Not Applicable

(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 to 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 or Rule 12b-2 of the Securities Exchange Act of 1934.

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 3.01 Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing.

On May 5, 2026, T3 Defense Inc., a Delaware corporation (the “Company”) received a written notice (the “Notice”) from The Nasdaq Stock Market, LLC ("Nasdaq") that it is not in compliance with the minimum bid requirements set forth in Nasdaq Listing Rule 5550(a)(2) for continued listing on The Nasdaq Global Market. Nasdaq Listing Rule 5550(a)(2) requires listed securities to maintain a minimum bid price of $1.00 per share, and Nasdaq Listing Rule 5810(c)(3)(A) provides that a failure to meet the minimum bid price requirement exists if the deficiency continues for a period of 30 consecutive business days. Based on the closing bid price of the Company’s common stock between March 23, 2026 to May 4, 2026, the Company no longer meets the minimum bid price requirement. The Notification Letter has no immediate effect on the listing or trading of the Company’s common stock on The Nasdaq Global Market and, at this time, the common stock will continue to trade on The Nasdaq Global Market under the symbol “DFNS.”

The Notification Letter provides that the Company has 180 calendar days, or until November 2, 2026, to regain compliance with Nasdaq Listing Rule 5550(a)(2). To regain compliance, the bid price of the Company's common stock must have a closing bid price of at least $1.00 per share for a minimum of 10 consecutive business days. If the Company does not regain compliance by November 2, 2026, the Company may be eligible for additional time to regain compliance. In such instance, the Company must submit an application and a non-refundable $5,000 application fee, so long as the Company meets The Nasdaq Global Market continued listing requirements (except for the bid price requirement) and notifies Nasdaq in writing of its intention to cure the deficiency during the second compliance period. If the Company does not qualify or fails to regain compliance, then Nasdaq will notify the Company of its determination to delist the Company's common stock.

The Company intends to monitor the closing bid price of its common stock and may, if appropriate, consider implementing available options, including, but not limited to, implementing a reverse stock split of its outstanding securities, to regain compliance with the minimum bid price requirement under the Nasdaq Listing Rules.

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 hereunto duly authorized.

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