Venrock Group Reports 9.99% Stake in Tenax Therapeutics (TENX)

Venrock-related entities and two individuals filed an amendment to Schedule 13G reporting collective beneficial ownership of 449,492 shares of Tenax Therapeutics common stock, representing 9.99% of the class as of June 30, 2025.

Rhea-AI Filing Summary

Venrock-related entities and two individuals filed an amendment to Schedule 13G reporting collective beneficial ownership of 449,492 shares of Tenax Therapeutics common stock, representing 9.99% of the class as of June 30, 2025. The reported position includes a mix of common shares, pre-funded warrants and common warrants, but the warrants contain a Beneficial Ownership Blocker that prevents exercise that would raise ownership above 9.99%. Ownership is held through VHCP III, VHCP Co-Investment III and VHCP EG, with VHCP Management entities and Messrs. Shah and Koh serving managerial/voting roles.

Positive

• Significant but non-controlling stake: A clear 9.99% position signals meaningful investor interest without control implications
• Disclosure clarity: Filing details share classes, warrants, manager relationships and includes executed powers of attorney and a joint filing agreement
• Warrant blocker provides predictability: The Beneficial Ownership Blocker prevents unplanned dilution above 9.99% from warrant exercise

Negative

• Near-threshold concentration: Holding just below 10% can still influence markets and may prompt investor scrutiny
• Warrant overhang complexity: Large numbers of underlying shares tied to warrants could create future dilution if blocker terms change

Insights

Financial Analyst

TL;DR: Venrock group holds a near-10% stake via shares and exercisable warrants, capped by a blocker that limits further dilution or increase.

The filing shows an economically significant 9.99% position in TENX comprised of direct shares and substantial warrant exposure. The Beneficial Ownership Blocker limits immediate conversion risk to the company and preserves the holders' ability to convert up to the threshold. For investors, this is a meaningful concentrated position but not a controlling stake; it may influence governance discussions without triggering change-of-control dynamics.

Corporate Governance Expert

TL;DR: A coordinated group with shared voting/dispositive power is disclosed; manager and principals are identified, with signed powers of attorney.

The Schedule 13G/A identifies the reporting group structure (general partners and management LLCs) and discloses shared voting and dispositive power over 449,492 shares. Signatures and referenced powers of attorney establish authorized representation. The filing is a routine, compliant disclosure of a passive investor group near the 10% reporting threshold.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake does Venrock report in Tenax Therapeutics (TENX)?

The reporting group beneficially owns 449,492 shares, reported as 9.99% of TENX as of June 30, 2025.

Does the filing include warrants that can increase ownership in TENX?

Yes. The position includes pre-funded warrants and common warrants, but a Beneficial Ownership Blocker prevents exercise that would raise ownership above 9.99%.

Who are the named reporting persons on the Schedule 13G/A?

VHCP III, VHCP Co-Investment III, VHCP EG, VHCP Management III, VHCP Management EG, and individuals Nimish Shah and Bong Y. Koh.

Where is the issuer Tenax Therapeutics headquartered?

The filing lists the issuer's address as 101 Glen Lennox Drive, Suite 300, Chapel Hill, NC 27517.

What percent calculation basis did the filers use?

Percent was calculated using 4,148,495 shares outstanding (May 9, 2025) plus 350,928 shares issuable upon warrant exercise, resulting in the reported 9.99%.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 08/14/2025 - 05:55 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

Tenax Therapeutics, Inc.

(Name of Issuer)

Common Stock, $0.0001 par value per share

(Title of Class of Securities)

171757206

(CUSIP Number)

06/30/2025

(Date of Event Which Requires Filing of this Statement)

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

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 171757206

1

Names of Reporting Persons

Venrock Healthcare Capital Partners III, L.P.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 449,492.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 449,492.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

449,492.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

9.9 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP No. 171757206

1

Names of Reporting Persons

VHCP Co-Investment Holdings III, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 449,492.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 449,492.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

449,492.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

9.9 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 171757206

1

Names of Reporting Persons

Venrock Healthcare Capital Partners EG, L.P.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 449,492.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 449,492.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

449,492.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

9.9 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP No. 171757206

1

Names of Reporting Persons

VHCP Management III, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 449,492.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 449,492.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

449,492.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

9.9 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 171757206

1

Names of Reporting Persons

VHCP Management EG, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 449,492.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 449,492.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

449,492.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

9.9 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 171757206

1

Names of Reporting Persons

Nimish Shah

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 449,492.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 449,492.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

449,492.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

9.9 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

CUSIP No. 171757206

1

Names of Reporting Persons

Bong Y. Koh

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 449,492.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 449,492.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

449,492.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

9.9 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Tenax Therapeutics, Inc.
(b)	Address of issuer's principal executive offices: 101 Glen Lennox Drive, Suite 300, Chapel Hill, NC, 27517.
Item 2.
(a)	Name of person filing: The names of the persons filing this report (collectively, the "Reporting Persons") are: Venrock Healthcare Capital Partners III, L.P. ("VHCP III") VHCP Co-Investment Holdings III, LLC ("VHCP Co-Investment III") Venrock Healthcare Capital Partners EG, L.P. ("VHCP EG") VHCP Management III, LLC ("VHCP Management III") VHCP Management EG, LLC ("VHCP Management EG") Nimish Shah ("Shah") Bong Koh ("Koh") The Reporting Persons are members of a group for the purposes of this Schedule 13G.
(b)	Address or principal business office or, if none, residence: New York Office: 7 Bryant Park, 23rd Floor New York, NY 10018 Palo Alto Office: 3340 Hillview Avenue Palo Alto, CA 94304
(c)	Citizenship: All of the entities were organized in Delaware. Shah and Koh are both United States citizens.
(d)	Title of class of securities: Common Stock, $0.0001 par value per share
(e)	CUSIP No.: 171757206
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: Row 9 of each Reporting Person's cover page to this Schedule 13G sets forth the aggregate number of shares the Issuer beneficially owned by such Reporting Person as of June 30, 2025 and is incorporated by reference. The Reporting Persons' ownership of the Issuer's securities consists of (i) 15,682 shares of Common Stock, pre-funded warrants (the "Pre-Funded Warrants") exercisable for up to 629,770 shares of Common Stock and common warrants (the "Common Warrants" and together with the Pre-Funded Warrants, the "Warrants") exercisable for up to 331,458 shares of Common Stock held by VHCP III, (ii) 1,567 shares of Common Stock, Pre-Funded Warrants exercisable for up to 62,937 shares of Common Stock and Common Warrants exercisable for up to 33,125 shares of Common Stock held by VHCP Co-Investment III, and (iii) 81,315 shares of Common Stock, Pre-Funded Warrants exercisable for up to 3,265,620 shares of Common Stock and Common Warrants exercisable for up to 1,718,747 shares of Common Stock held by VHCP EG. The Warrants contain a provision (the "Beneficial Ownership Blocker"), which precludes the exercise of the Warrants to the extent that, following exercise, VHCP III, VHCP Co-Investment III and VHCP EG, together with their affiliates and other attribution parties, would own more than 9.99% of the Common Stock outstanding of the Issuer. VHCP III, VHCP Co-Investment III and VHCP EG are currently prohibited from exercising a portion of the Warrants to the extent that such exercise would result in beneficial ownership of more than 449,492 shares of Common Stock of the Issuer. VHCP Management III is the general partner of VHCP III and the manager of VHCP Co-Investment III. VHCP Management EG is the general partner of VHCP EG. Messrs. Shah and Koh are the voting members of VHCP Management III and VHCP Management EG.
(b)	Percent of class: Due to the Beneficial Ownership Blocker listed in the Warrants, each Reporting Person's beneficial ownership percentage was 9.99% as of June 30, 2025. Such percentage is based upon the sum of (i) 4,148,495 shares of the Issuer's Common Stock outstanding as of May 9, 2025, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission (the "SEC") on May 14, 2025 and (ii) 350,928 shares of Common Stock issuable upon the exercise of the Warrants. Due to field limitations of the EDGAR filing system, the percentages listed in Row 11 of the Reporting Persons' cover pages have been rounded down to 9.9%.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Row 5 of each Reporting Person's cover page to this Schedule 13G sets forth the sole power to vote or to direct the vote of securities of the Issuer beneficially owned by such Reporting Person as of June 30, 2025 and is incorporated by reference.
	(ii) Shared power to vote or to direct the vote: Row 6 of each Reporting Person's cover page to this Schedule 13G sets forth the shared power to vote or to direct the vote of securities of the Issuer beneficially owned by such Reporting Person as of June 30, 2025 and is incorporated by reference.
	(iii) Sole power to dispose or to direct the disposition of: Row 7 of each Reporting Person's cover page to this Schedule 13G sets forth the sole power to dispose or to direct the disposition of securities of the Issuer beneficially owned by such Reporting Person as of June 30, 2025 and is incorporated by reference.
	(iv) Shared power to dispose or to direct the disposition of: Row 8 of each Reporting Person's cover page to this Schedule 13G sets forth the shared power to dispose or to direct the disposition of securities of the Issuer beneficially owned by such Reporting Person as of June 30, 2025 and is incorporated by reference.
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	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.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

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.

Venrock Healthcare Capital Partners III, L.P.

Signature:	/s/ Sherman G. Souther
Name/Title:	By VHCP Management III, LLC, its General Partner, By Sherman G. Souther, Authorized Signatory
Date:	08/14/2025

VHCP Co-Investment Holdings III, LLC

Signature:	/s/ Sherman G. Souther
Name/Title:	By VHCP Management III, LLC, its Manager, By Sherman G. Souther, Authorized Signatory
Date:	08/14/2025

Venrock Healthcare Capital Partners EG, L.P.

Signature:	/s/ Sherman G. Souther
Name/Title:	By VHCP Management EG, LLC, its General Partner, By Sherman G. Souther, Authorized Signatory
Date:	08/14/2025

VHCP Management III, LLC

Signature:	/s/ Sherman G. Souther
Name/Title:	By Sherman G. Souther, Authorized Signatory
Date:	08/14/2025

VHCP Management EG, LLC

Signature:	/s/ Sherman G. Souther
Name/Title:	By Sherman G. Souther, Authorized Signatory
Date:	08/14/2025

Nimish Shah

Signature:	/s/ Sherman G. Souther
Name/Title:	By Sherman G. Souther, Attorney-in-fact
Date:	08/14/2025

Bong Y. Koh

Signature:	/s/ Sherman G. Souther
Name/Title:	By Sherman G. Souther, Attorney-in-fact
Date:	08/14/2025

Exhibit Information

Exhibit 24.1 Power of Attorney for Nimish Shah (incorporated by reference to Exhibit B to Schedule 13G filed on August 19, 2024) Exhibit 24.2 Power of Attorney for Bong Koh (incorporated by reference to Exhibit C to Schedule 13G filed on August 19, 2024) Exhibit 99.1 Joint Filing Agreement (incorporated by reference to Exhibit 99.1 to Schedule 13G/A filed on May 15, 2025)