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SEC FORM 3 SEC Form 3
FORM 3 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940 		 
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1. Name and Address of Reporting Person*
Vaishnaw Akshay
(Last) (First) (Middle)
C/O HEMAB THERAPEUTICS HOLDINGS, INC.
101 MAIN STREET, SUITE 1220
(Street)
CAMBRIDGE MA 02142
(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
04/30/2026 		3. Issuer Name and Ticker or Trading Symbol
Hemab Therapeutics Holdings, Inc. [ COAG ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
checkbox checked Director 10% Owner
Officer (give title below) Other (specify below)
5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
checkbox checked Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Warrants (Right to Buy) (1) 05/07/2034 Common Stock 27,544 6.97 D
Warrants (Right to Buy) (2) 01/28/2036 Common Stock 37,796 6 D
Explanation of Responses:
1. The warrant was granted on May 8, 2024. The shares underlying the warrant vest over three years in equal monthly installments from January 1, 2024 through January 1, 2027.
2. The warrant was granted on January 29, 2026. The shares underlying the warrant vest over three years in equal monthly installments from January 1, 2026 through January 1, 2029.
Remarks:
24.1 Power of Attorney
/s/ Mads Nikolaj Behrndt-Eriksen, as Attorney-in-Fact 04/30/2026
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
EX-24

Exhibit 24.1

POWER OF ATTORNEY

The undersigned hereby makes, constitutes and appoints each of Mads Nikolaj Behrndt, Benny Sørensen and Klaus Krainer Jønsson, or any of them acting singly, and with full power of substitution, re-substitution and delegation, the undersigned’s true and lawful attorney‑in‑fact (each of such persons and their substitutes and delegees being referred to herein as the "Attorney-in-Fact"), with full power to act for the undersigned and in the undersigned's name, place and stead, in the undersigned’s capacity as an officer, director or stockholder of Hemab Therapeutics Holdings, Inc. (the “Company”), to:

1.
Take such actions as may be necessary or appropriate to enable the undersigned to submit and file forms, schedules and other documents with the U.S. Securities and Exchange Commission (“SEC”) utilizing the SEC’s Electronic Data Gathering and Retrieval (“EDGAR”) system, which actions may include (a) enrolling the undersigned in EDGAR Next and (b) preparing, executing and submitting to the SEC a Form ID, amendments thereto, and such other documents and information as may be necessary or appropriate to obtain and/or modify codes and passwords enabling the undersigned to make filings and submissions utilizing the EDGAR system;
2.
Prepare and execute any and all forms, schedules and other documents (including any amendments thereto) the undersigned is required to file with the SEC, or which the Attorney-in-Fact considers it advisable for the undersigned to file with the SEC, under Section 13 or Section 16 of the Securities Exchange Act of 1934 or any rule or regulation thereunder, or under Rule 144 under the Securities Act of 1933 (“Rule 144”), including Forms 3, 4 and 5, Schedules 13D and 13G, and Forms 144 (all such forms, schedules and other documents being referred to herein as “SEC Filings”);
3.
Submit and file SEC Filings with the SEC utilizing the EDGAR system or any such third-party system with which the Company, the undersigned or the Attorney-in-Fact uses to make EDGAR filings with the SEC or cause them to be submitted and filed by a person appointed under Section 5 below;
4.
File, submit or otherwise deliver SEC Filings to any securities exchange on which the Company’s securities may be listed or traded;
5.
Act as an account administrator for the undersigned’s EDGAR account, including: (i) appoint, remove and replace account administrators, account users, technical administrators and delegated entities; (ii) maintain the security of the undersigned’s EDGAR account, including modification of access codes; (iii) maintain, modify and certify the accuracy of information on the undersigned’s EDGAR account dashboard; (iv) act as the EDGAR point of contact with respect to the undersigned’s EDGAR account; and (v) any other actions contemplated by Rule 10 of Regulation S-T with respect to account administrators; or act as a delegated administrator for the undersigned’s EDGAR account, including: (i) appoint, remove and replace delegated account administrators and users; (ii) maintain the security of the undersigned’s EDGAR account; and (iii) any other actions contemplated by Rule 10 of Regulation S-T with respect to delegated entities;
6.
Cause the Company to accept a delegation of authority from any of the undersigned’s EDGAR account administrators and, pursuant to that delegation, authorize the Company’s EDGAR account administrators to appoint, remove or replace users for the undersigned’s EDGAR account; and

 

 

7.
Obtain, as the undersigned's representative and on the undersigned's behalf, information regarding transactions in the Company's equity securities from any third party, including the Company and any brokers, dealers, employee benefit plan administrators and trustees, and the undersigned hereby authorizes any such third party to release any such information to the Attorney-in-Fact.

The undersigned acknowledges that:

a)
This Power of Attorney authorizes, but does not require, the Attorney-in-Fact to act in his or her discretion on information provided to such Attorney-in-Fact without independent verification of such information;
b)
Any documents prepared or executed by the Attorney-in-Fact on behalf of the undersigned pursuant to this Power of Attorney will be in such form and will contain such information as the Attorney-in-Fact, in his or her discretion, deems necessary or desirable;
c)
Neither the Company nor the Attorney-in-Fact assumes any liability for the undersigned's responsibility to comply with the requirements of Section 13 or Section 16 of the Exchange Act or Rule 144, any liability of the undersigned for any failure to comply with such requirements, or any liability of the undersigned for disgorgement of profits under Section 16(b) of the Exchange Act; and
d)
This Power of Attorney does not relieve the undersigned from responsibility for compliance with the undersigned's obligations under Section 13 or Section 16 of the Exchange Act, including, without limitation, the reporting requirements under Section 13 or Section 16 of the Exchange Act.

The undersigned hereby grants to the Attorney-in-Fact full power and authority to do and perform each and every act and thing requisite, necessary or advisable to be done in connection with the foregoing, as fully, to all intents and purposes, as the undersigned might or could do in person, hereby ratifying and confirming all that the Attorney-in-Fact, or his or her substitute or substitutes, shall lawfully do or cause to be done by authority of this Power of Attorney.

This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 4 or 5 or Schedules 13D or 13G or Forms 144 with respect to the undersigned's holdings of and transactions in securities of the Company, unless earlier revoked by the undersigned in a signed writing delivered to the Attorney-in-Fact. This Power of Attorney revokes all previous powers of attorney with respect to the subject matter of this Power of Attorney.

IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney as of April 24, 2026.

 

 

/s/ Akshay Krishnadas Vaishnaw

 

 

Signature

 

 

 

 

 

Akshay Krishnadas Vaishnaw

 

 

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