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): November 14, 2025

Dynamix Corporation III

(Exact name of registrant as specified in its charter)

Cayman Islands		001-42921		00-0000000
(State or other jurisdiction of incorporation)		(Commission File Number)		(IRS Employer Identification Number)

1980 Post Oak Blvd., Suite 100

PMB 6373

Houston, TX, 77056

(Address of principal executive offices, including zip code)

Registrant’s telephone number, including area code: (646) 792 5600

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 of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class	Trading Symbol(s)	Name of each exchange on which each class is registered
Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant	DNMXU	The Nasdaq Stock Market LLC
Class A ordinary shares, par value $0.0001 per share	DNMX	The Nasdaq Stock Market LLC
Redeemable warrants, each whole warrant exercisable for one Class A ordinary share, at an exercise price of $11.50 per share	DNMXW	The Nasdaq Stock Market LLC

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 8.01. Other Events.

On November 14, 2025, Dynamix Corporation III (the “Company”) issued a press release, a copy of which is attached as Exhibit 99.1 to this Current Report on Form 8-K, announcing that the holders of the Company’s units (the “Units”) may elect to separately trade the Class A ordinary shares and warrants comprising the Units commencing November 19, 2025. Those Units not separated will continue to trade on the Nasdaq Stock Market LLC under the symbol “DNMXU,” and each of the Class A ordinary shares and warrants that are separated will trade on the Nasdaq Stock Market LLC under symbols “DNMX” and “DNMXW,” respectively.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

The following exhibits are being filed herewith:

Exhibit No.		Description
99.1		Press Release, dated November 14, 2025
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

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.

	DYNAMIX CORPORATION III

Date: November 14, 2025	By:	/s/ Andrea Bernatova
		Name: Andrea Bernatova
		Title: Chief Executive Officer

Dynamix Corp III 8-K