Biomea Fusion, Inc. (BMEA) officer reports purchase of 30,000 shares

Rhea-AI Filing Summary

Biomea Fusion, Inc. executive and director Rainer M. Erdtmann reported buying 30,000 shares of Biomea Fusion common stock on 12/11/2025 at a weighted-average price of $1.4333 per share. After this transaction, he directly owns 723,027 shares.

Erdtmann also reports indirect holdings, including 19,400 shares held by a daughter, 20,000 shares held by a son, 20,000 shares held by another daughter, and additional shares held in two independent trusts and two Point Sur investment entities where he has voting or dispositive power but disclaims beneficial ownership beyond any pecuniary interest. He serves as President, Chief Operating Officer, Principal Financial Officer, Principal Accounting Officer, and a director of Biomea Fusion. The 30,000-share purchase was executed in multiple trades between $1.42 and $1.46 per share.

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Erdtmann Rainer M

(Last) (First) (Middle)

C/O BIOMEA FUSION, INC.

1599 INDUSTRIAL ROAD

(Street)

SAN CARLOS CA 94070

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Biomea Fusion, Inc. [ BMEA ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	See Remarks

3. Date of Earliest Transaction (Month/Day/Year)
12/11/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	12/11/2025		P		30,000	A	$1.4333(1)	723,027	D
Common Stock								19,400	I	By daughter
Common Stock								20,000	I	By son
Common Stock								20,000	I	By daughter
Common Stock								174,614	I	See Footnote(2)
Common Stock								1,134,989	I	See Footnote(3)
Common Stock								228,470	I	See Footnote(4)
Common Stock								252,320	I	See Footnote(5)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $1.42 to $1.46, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range.

2. The shares are held by a trust having an independent trustee ("Trust 1"). The Reporting Person disclaims Section 16 beneficial ownership of the securities, except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed to be an admission that he has beneficial ownership of such shares for Section 16 or any other purpose.

3. The shares are held by a trust having an independent trustee ("Trust 2"). The Reporting Person disclaims Section 16 beneficial ownership of the securities, except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed to be an admission that he has beneficial ownership of such shares for Section 16 or any other purpose.

4. The shares are held directly by Point Sur Investors Fund I, LP ("Point Sur LP"). The General Partner of Point Sur LP is Point Sur Investors LLC. The Reporting Person is a managing member of Point Sur Investors, LLC and as such has voting and dispositive power over the securities held by Point Sur LP. The Reporting Person disclaims Section 16 beneficial ownership of the securities, except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed to be an admission that he has beneficial ownership of such shares for Section 16 or any other purpose.

5. The shares are held directly by Point Sur Investors, LLC. The Reporting Person is a managing members of Point Sur Investors, LLC and as such has voting and dispositive power over the securities held by Point Sur Investors, LLC. The Reporting Person disclaims Section 16 beneficial ownership of the securities, except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed to be an admission that he has beneficial ownership of such shares for Section 16 or any other purpose.

Remarks:

President, Chief Operating Officer, Principal Financial Officer, and Principal Accounting Officer

	/s/ Rainer M. Erdtmann	12/15/2025
	** 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 4 (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.

FAQ

What insider transaction did Biomea Fusion, Inc. (BMEA) disclose in this Form 4?

The filing reports that Rainer M. Erdtmann purchased 30,000 shares of Biomea Fusion common stock on 12/11/2025 at a weighted-average price of $1.4333 per share.

Who is Rainer M. Erdtmann at Biomea Fusion, Inc. (BMEA)?

Rainer M. Erdtmann is a director of Biomea Fusion and serves as President, Chief Operating Officer, Principal Financial Officer, and Principal Accounting Officer, making him a key executive of the company.

How many Biomea Fusion (BMEA) shares does Rainer M. Erdtmann own directly after the reported trade?

Following the reported purchase, Rainer M. Erdtmann directly owns 723,027 shares of Biomea Fusion common stock.

At what prices were the 30,000 Biomea Fusion (BMEA) shares purchased?

The filing states a weighted-average purchase price of $1.4333 per share for the 30,000 shares, with individual trades executed at prices ranging from $1.42 to $1.46 per share.

What indirect Biomea Fusion share holdings are associated with Rainer M. Erdtmann?

Indirectly, Erdtmann reports 19,400 shares held by a daughter, 20,000 shares held by a son, 20,000 shares held by another daughter, plus shares held by Trust 1 (174,614 shares), Trust 2 (1,134,989 shares), Point Sur Investors Fund I, LP (228,470 shares), and Point Sur Investors, LLC (252,320 shares), while he disclaims beneficial ownership beyond any pecuniary interest.

How does the Form 4 describe the independent trusts and Point Sur investment entities?

The filing explains that Trust 1 and Trust 2 have independent trustees, and that certain shares are held directly by Point Sur Investors Fund I, LP and Point Sur Investors, LLC. Erdtmann has voting and dispositive power over these securities but disclaims Section 16 beneficial ownership except to the extent of his pecuniary interest, if any.

What does the weighted-average price disclosure in the Biomea Fusion (BMEA) Form 4 mean?

The Form 4 notes that the $1.4333 price is a weighted average because the 30,000 shares were bought in multiple transactions between $1.42 and $1.46. The filer undertakes to provide full trade-by-trade pricing details upon request.