DynamixCore Holdings III, LLC - 29 Oct 2025 Form 3 Insider Report for Dynamix Corp III (DNMXU)

Role: 10%+ Owner
Signature: /s/ Andrea Bernatova, Managing Member of DynamixCore Holdings III, LLC
Issuer symbol: DNMXU
Transactions as of: 29 Oct 2025
Net transactions value: $0
Form type: 3
Filing time: 29 Oct 2025, 20:21:16 UTC
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
DynamixCore Holdings III, LLC	10%+ Owner	1980 POST OAK BOULEVARD, SUITE 100, PMB 6373, HOUSTON	/s/ Andrea Bernatova, Managing Member of DynamixCore Holdings III, LLC	29 Oct 2025	0002093802

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	DNMXU	Class B ordinary shares, par value $0.0001							29 Oct 2025	Class A ordinary shares, par value $0.0001	6,708,333		Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The reporting person owns 6,708,333 Class B ordinary shares which are convertible into Class A ordinary shares as described under the heading "Description of Securities-Founder Shares" in the Issuer's registration statement on Form S-1 (File No. 333-289517). The Class B ordinary shares have no expiration date. Includes 875,000 Class B ordinary shares that are subject to forfeiture depending on the extent to which the underwriters' over-allotment option is exercised in connection with the Issuer's initial public offering of Class A ordinary shares.
F2	The reporting person is controlled by Andrea Bernatova, its managing member. Accordingly, Ms. Bernatova may be deemed to have beneficial ownership of the Class B ordinary shares held directly by the reporting person.

Content

The reporting person owns 6,708,333 Class B ordinary shares which are convertible into Class A ordinary shares as described under the heading "Description of Securities-Founder Shares" in the Issuer's registration statement on Form S-1 (File No. 333-289517). The Class B ordinary shares have no expiration date. Includes 875,000 Class B ordinary shares that are subject to forfeiture depending on the extent to which the underwriters' over-allotment option is exercised in connection with the Issuer's initial public offering of Class A ordinary shares.

The reporting person is controlled by Andrea Bernatova, its managing member. Accordingly, Ms. Bernatova may be deemed to have beneficial ownership of the Class B ordinary shares held directly by the reporting person.