# EDGAR Filing Document

**Accession Number:** 0002081125
**File Stem:** 0001213900-26-009100
**Filing Date:** 2026-1
**Character Count:** 14595
**Document Hash:** d889b509d1e30502aa57dfc438bef229
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-26-009100.hdr.sgml**: 20260129

**ACCESSION NUMBER**: 0001213900-26-009100

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13G

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260129

**DATE AS OF CHANGE**: 20260129

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Dynamix Corp III
- **CENTRAL INDEX KEY:** 0002081125
- **STANDARD INDUSTRIAL CLASSIFICATION:** BLANK CHECKS [6770]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 000000000
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-95438
- **FILM NUMBER:** 26574585

**BUSINESS ADDRESS:**
- **STREET 1:** 1980 POST OAK BOULEVARD
- **STREET 2:** SUITE 100, PMB 6373
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77056
- **BUSINESS PHONE:** 214-987-6100

**MAIL ADDRESS:**
- **STREET 1:** 1980 POST OAK BOULEVARD
- **STREET 2:** SUITE 100, PMB 6373
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77056
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** DynamixCore Holdings III, LLC
- **CENTRAL INDEX KEY:** 0002093802

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G

**BUSINESS ADDRESS:**
- **STREET 1:** 1980 POST OAK BOULEVARD
- **STREET 2:** SUITE 100, PMB 6373
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77056
- **BUSINESS PHONE:** 214-987-6100

**MAIL ADDRESS:**
- **STREET 1:** 1980 POST OAK BOULEVARD
- **STREET 2:** SUITE 100, PMB 6373
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77056

## Exhibit 99.1

**Exhibit 1**

**<u>JOINT FILING AGREEMENT</u>**

JOINT FILING AGREEMENT, dated as of the 29<sup>th</sup>, day of January, 2026, among DynamixCore Holdings III, LLC, and Andrea Bernatova (collectively, the "Joint Filers").

WHEREAS, pursuant to Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), the parties hereto desire to satisfy any filing obligation under Section 13(g) of the Exchange Act by a single joint filing;

NOW, THEREFORE, in consideration of the premises and the mutual covenants herein contained, the Joint Filers hereby agree and represent as follows:

&nbsp;&nbsp;&nbsp;&nbsp;1. The Schedule 13G with respect to the Class A ordinary shares, par value $0.0001 per share, of Dynamix Corporation III. (to which this
Joint Filing Agreement is an exhibit) is filed on behalf of each of the Joint Filers.

&nbsp;&nbsp;&nbsp;&nbsp;2. Each of the Joint Filers is eligible to use Schedule 13G for the filing of the information therein contained.

&nbsp;&nbsp;&nbsp;&nbsp;3. Each of the Joint Filers is responsible for the timely filing of the Schedule 13G and any amendments thereto, and for the completeness
and accuracy of the information concerning such person contained therein, provided that each such person is not responsible for the completeness
or accuracy of the information concerning the other persons making the filing, unless such person knows or has reason to believe that
such information is inaccurate.

IN WITNESS WHEREOF, each of the undersigned has caused this Joint Filing Agreement to be duly executed and delivered as of the date first above written.

---

| | |
|:---|:---|
| **DYNAMIXCORE HOLDINGS III, LLC** | **DYNAMIXCORE HOLDINGS III, LLC** |
| By: | /s/ Andrea Bernatova |
| Name: | Andrea Berantova |
| Title: | Managing Member |
| By: | /s/ Andrea Bernatova |
| Name: | Andrea Bernatova |

---

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13G

### Under the Securities Exchange Act of 1934

**Issuer:** Dynamix Corp III

**Title of Class of Securities:** Class A ordinary shares, par value $0.0001 per share

**CUSIP Number:** G2949T109

**Date of Event Which Requires Filing of this Statement:** 12/31/2025

**Check the appropriate box to designate the rule pursuant to which this Schedule is filed:**

- [ ] Rule 13d-1(b)

- [ ] Rule 13d-1(c)

- [x] Rule 13d-1(d)

---

| 1. | Names of Reporting Persons<br>DynamixCore Holdings III, LLC | Names of Reporting Persons<br>DynamixCore Holdings III, LLC |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>6708333.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>6708333.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>6708333.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>6708333.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>24.9% | Percent of Class Represented by Amount in Row (9)<br>24.9% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

**Comment for Type of Reporting Person:** (1) Consists of 6,708,333 Class A ordinary shares, par value $0.0001 per share ("Class A ordinary shares"), of Dynamix Corporation III (the "Issuer") acquirable upon conversion of 6,708,333 Class B ordinary shares, par value $0.0001 per share ("Class B ordinary shares"), of the Issuer.

(2) Excludes 4,262,500  Class A ordinary shares issuable upon the exercise of 4,262,500  private placement warrants of the Issuer owned by Sponsor. Each warrant is exercisable to purchase one Class A ordinary share at $11.50 per share, subject to adjustment, and becomes exercisable beginning 30 days after the completion of the Issuer's initial business combination and expires five years after the completion of the Issuer's initial business combination or earlier upon redemption or liquidation.

---

| 1. | Names of Reporting Persons<br>Andrea Bernatova | Names of Reporting Persons<br>Andrea Bernatova |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>X1 | Citizenship or Place of Organization<br>X1 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>6708333.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>6708333.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>6708333.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>6708333.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>24.9% | Percent of Class Represented by Amount in Row (9)<br>24.9% |
| 12. | Type of Reporting Person (See Instructions)<br>IN | Type of Reporting Person (See Instructions)<br>IN |

**Comment for Type of Reporting Person:** (1) Consists of 6,708,333 Class A ordinary shares acquirable upon conversion of 6,708,333 Class B ordinary shares owned directly by Sponsor. A. Bernatova ("Ms. Bernatova") is a managing member of Sponsor and, accordingly, may be deemed to have beneficial ownership of the Class A ordinary shares owned directly by Sponsor. Ms. Bernatova disclaims beneficial ownership of such securities except to the extent of her pecuniary interest therein.

(2) Excludes 4,262,500 Class A ordinary shares issuable upon the exercise of 4,262,500 private placement warrants of the Issuer owned by the Sponsor. Each warrant is exercisable to purchase one Class A ordinary share at $11.50 per share, subject to adjustment, and becomes exercisable beginning 30 days after the completion of the Issuer's initial business combination and expires five years after the completion of the Issuer's initial business combination or earlier upon redemption or liquidation.

---

**Item 1(a). Name of Issuer:**
Dynamix Corp III

**Item 1(b). Address of Issuer's Principal Executive Offices:**
1980 Post Oak Blvd., Suite 100 PMB 6373 Houston, TX, 770561

**Item 2(a). Name of Person Filing:**
The information required by this Item is set forth in Item 2(b) below and incorporated by reference herein. This statement is being filed pursuant to a Joint Filing Agreement attached hereto as Exhibit 1 by (i) the Sponsor and (ii) Ms. Bernatova, the managing member of Sponsor, (collectively, the "Reporting Persons").

**Item 2(b). Address of Principal Business Office:**
Name of Person Filing

DynamixCore Holdings, LLC
Andrea Bernatova

Principal Business Office Address

1980 Post Oak Blvd., Suite 100
PMB 6373
Houston, TX, 770561

1980 Post Oak Blvd., Suite 100
PMB 6373
Houston, TX, 770561

Place of Organization

Delaware limited liability company

United States citizen

**Item 2(c). Citizenship:**
The information required by this Item with respect to each Reporting Person is set forth in Item 2(b) above.

**Item 2(d). Title of Class of Securities:**
Class A ordinary shares, par value $0.0001 per share

**Item 2(e). CUSIP Number:**
G2949T109

**Item 3. If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:**

(a) [ ] Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b) [ ] Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(c) [ ] Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d) [ ] Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

(e) [ ] An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);

(f) [ ] An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);

(g) [ ] A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h) [ ] A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i) [ ] A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j) [ ] A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), if filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:

(k) [ ] Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).

**Item 4. Ownership:**

**(a) Amount beneficially owned:**

The following information is provided as of December 31, 2025.
Sponsor has shared voting and shared dispositive power with respect to 6,708,333 Class A ordinary shares, acquirable by Sponsor upon conversion of 6,708,333 Class B ordinary shares held directly by Sponsor. The Class B ordinary shares will automatically convert into Class A ordinary shares at the time of the Issuer's initial business combination on a one-for-one basis, subject to adjustment for share sub-divisions, share dividends, rights issuances, consolidations, reorganizations, recapitalizations and the like, and subject to further adjustment. Ms. Bernatova has shared voting and shared dispositive power with respect to 6,708,333 Class A ordinary shares acquirable by Sponsor upon conversion of 6,708,333 Class B ordinary shares of the Issuer held directly by Sponsor.
The following sets forth the beneficial ownership of the Class A ordinary shares by each of the Reporting Persons as of December 31, 2025:
(i) Sponsor is the beneficial owner of 6,708,333 Class A ordinary shares; and
(ii) Ms. Bernatova is the beneficial owner of 6,708,333 Class A ordinary shares.

**(b) Percent of class:**

(i) 24.9% for Sponsor; and
(ii) 24.9% for Ms. Bernatova.

**(c) Number of shares as to which the person has:**

**(i) Sole power to vote or to direct the vote:**

0 Class A ordinary shares for Sponsor; and
0 Class A ordinary shares for Ms. Bernatova.

**(ii) Shared power to vote or to direct the vote:**

6,708,333 Class A ordinary shares for Sponsor; and
6,708,333 Class A ordinary shares for Ms. Bernatova.

**(iii) Sole power to dispose or to direct the disposition of:**

0 Class A ordinary shares for Sponsor; and
0 Class A ordinary shares for Ms. Bernatova.

**(iv) Shared power to dispose or to direct the disposition of:**

6,708,333 Class A ordinary shares for Sponsor; and
6,708,333 Class A ordinary shares for Ms. Bernatova.

**Item 5. Ownership of Five Percent or Less of a Class.**

[x] If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following.

**Item 6. Ownership of More than 5 Percent on Behalf of Another Person.**

Not Applicable

**Item 7. Identification and Classification of the Subsidiary**

Not Applicable

**Item 8. Identification and Classification of Members of the Group**

Not Applicable

**Item 9. Notice of Dissolution of Group**

Not Applicable

**Item 10. Certification:**

—

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**DynamixCore Holdings III, LLC**

**Date:** 01/29/2026

**By:** /s/ Andrea Bernatova

**Name & Title:** Andrea Bernatova/Managing Member

**Andrea Bernatova**

**Date:** 01/29/2026

**By:** /s/ Andrea Bernatova

**Name & Title:** Andrea Bernatova