[SCHEDULE 13G/A] Biomea Fusion, Inc. SEC Filing

Rhea-AI Filing Summary

Biomea Fusion, Inc. reporting persons disclosed their beneficial ownership of the company’s common stock. The filing shows that Rainer M. Erdtmann beneficially owns an aggregate of 2,975,224 shares, representing approximately 5.2% of the outstanding class on the basis reported. That total includes 482,404 shares issuable upon exercise of options exercisable within 60 days plus directly held shares and shares held in trusts and for family members.

Related entities Point Sur Investors, LLC and Point Sur Investors Fund I, L.P. directly hold 252,320 and 228,470 shares, respectively (a combined 480,790 shares), over which Mr. Erdtmann has shared voting and dispositive power as the managing member and general partner.

Positive

• Aggregate beneficial ownership disclosed: Reporting persons identify 2,975,224 shares beneficially owned by Rainer M. Erdtmann.
• Material threshold exceeded: The filing reports approximately 5.2% ownership of the outstanding class, meeting the regulatory disclosure threshold.
• Options included: The reported beneficial ownership explicitly includes 482,404 shares issuable upon exercise of options exercisable within 60 days.
• Affiliated holdings clarified: Point Sur entities directly hold a combined 480,790 shares, with Mr. Erdtmann having shared voting and dispositive power.

Negative

• None.

Insights

Financial Analyst

TL;DR: Disclosure shows a reported >5% stake by a reporting person, driven partly by exercisable options.

This Schedule 13G/A provides a clear breakdown of beneficial ownership: an aggregate of 2,975,224 shares attributed to Rainer M. Erdtmann, equating to about 5.2% of the reported outstanding shares, with 482,404 options exercisable within 60 days included in that total. Point Sur entities directly hold 480,790 shares combined, and Mr. Erdtmann has shared voting and dispositive power over those holdings through his roles. For investors, this is a material ownership disclosure but not an operational or financial performance update.

Corporate Governance Expert

TL;DR: Ownership concentration disclosed but presented as a passive beneficial holding structure.

The filing documents ownership attribution across direct holdings, trusts, family holdings and option positions, and notes the governance relationship where Mr. Erdtmann exercises shared voting/dispositive power over Point Sur holdings. The split between directly held shares and shares held via affiliated entities is specified, clarifying control relationships. This is primarily a transparency and compliance disclosure relevant to governance and investor awareness rather than an immediate governance change.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

Biomea Fusion, Inc.

(Name of Issuer)

Common Stock, $0.0001 par value

(Title of Class of Securities)

09077A106

(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. 09077A106

1

Names of Reporting Persons

Rainer M. Erdtmann

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 2,494,434.00
6	Shared Voting Power 480,790.00
7	Sole Dispositive Power 2,494,434.00
8	Shared Dispositive Power 480,790.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,975,224.00

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)

5.2 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

CUSIP No. 09077A106

1

Names of Reporting Persons

Point Sur Investors, 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 480,790.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 480,790.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

480,790.00

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)

0.8 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP No. 09077A106

1

Names of Reporting Persons

Point Sur Investors Fund I, 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 228,470.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 228,470.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

228,470.00

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)

0.4 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Biomea Fusion, Inc.
(b)	Address of issuer's principal executive offices: 1599 Industrial Road, San Carlos, CA 94070
Item 2.
(a)	Name of person filing: This statement is filed by the entities listed below, who are collectively referred to herein as "Reporting Persons," with respect to the shares of common stock of Biomea Fusion, Inc. (the "Company"), par value $0.0001 per share (the "Shares"). (i) Rainer M. Erdtmann, a citizen of the United States of America; (ii) Point Sur Investors, LLC, a Delaware limited liability company ("Point Sur LLC") ; and (iii) Point Sur Investors Fund I, L.P., a Delaware limited partnership ("Point Sur Investors Fund").
(b)	Address or principal business office or, if none, residence: The address of the principal business office of Rainer M. Erdtmann is c/o Biomea Fusion, Inc., 1599 Industrial Road, San Carlos, CA 94070. The address of the principal business office of Point Sur LLC and Point Sur Investors Fund is 1073 Arlington Blvd., El Cerrito, CA 94530.
(c)	Citizenship: See Item 2(a) above.
(d)	Title of class of securities: Common Stock, $0.0001 par value
(e)	CUSIP No.: 09077A106
Item 4.	Ownership
(a)	Amount beneficially owned: Rainer M. Erdtmann may be deemed to beneficially own 2,494,434 Shares, consisting of: (i) 482,404 Shares issuable upon the exercise of stock options exercisable within 60 days held directly by Rainer M. Erdtmann, (ii) 643,027 shares held directly by Rainer M. Erdtmann, (iii) an aggregate of 59,400 Shares held by the children of Rainer M. Erdtmann, (iv) 174,614 Shares held by a trust with an independent trustee ("Trust 1"); and (v) 1,134,989 Shares held by a separate trust with an independent trustee ("Trust 2"). Point Sur Investors Fund directly holds 228,470 Shares. Point Sur LLC directly holds 252,320 Shares. Point Sur LLC is the General Partner of Point Sur Investors Fund. Rainer M. Erdtmann is a managing member of Point Sur LLC and, as such, Mr. Erdtmann has shared voting and dispositive power over the Shares held by both Point Sur Investors Fund and Point Sur LLC.
(b)	Percent of class: The percent of class of the outstanding Shares beneficially owned by the Reporting Persons in Item 4(a) are based on (i) 57,022,250 Shares outstanding as of the completion of the offering of the Shares referred to in the Company's Prospectus Supplement (to the Prospectus dated October 24, 2022, Registration No. 333-267884), filed on June 18, 2025 and (ii) 482,404 Shares issuable within 60 days after June 30, 2025 upon the exercise of options held directly by Rainer M. Erdtmann, which have been added to the Shares reported as outstanding in accordance with Rule 13d-3(d)(1)(i) under the Securities Exchange Act of 1934.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: The information required by this Item 4(c)(i) is set forth in Row 5 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
	(ii) Shared power to vote or to direct the vote: The information required by this Item 4(c)(ii) is set forth in Row 6 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
	(iii) Sole power to dispose or to direct the disposition of: The information required by this Item 4(c)(iii) is set forth in Row 7 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
	(iv) Shared power to dispose or to direct the disposition of: The information required by this Item 4(c)(iv) is set forth in Row 8 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
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:
	Not Applicable

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.

Rainer M. Erdtmann

Signature:	/s/ Rainer M. Erdtmann
Name/Title:	Rainer M. Erdtmann
Date:	08/13/2025

Point Sur Investors, LLC

Signature:	/s/ Rainer M. Erdtmann
Name/Title:	Rainer M. Erdtmann, Authorized Signatory
Date:	08/13/2025

Point Sur Investors Fund I, L.P.

Signature:	/s/ Rainer M. Erdtmann
Name/Title:	Rainer M. Erdtmann, Authorized Signatory
Date:	08/13/2025

FAQ

Who filed the Schedule 13G/A for Biomea Fusion (BMEA)?

Rainer M. Erdtmann, Point Sur Investors, LLC and Point Sur Investors Fund I, L.P. are the reporting persons identified in the filing.

How many Biomea Fusion (BMEA) shares does Rainer M. Erdtmann beneficially own?

2,975,224 shares are attributed to Rainer M. Erdtmann in aggregate on the filing.

What percentage of Biomea Fusion (BMEA) does the reported ownership represent?

The filing states the reported ownership represents approximately 5.2% of the outstanding class on the basis provided in the statement.

Does the reported beneficial ownership include exercisable options?

Yes. The total for Mr. Erdtmann includes 482,404 shares issuable upon exercise of options exercisable within 60 days.

How many shares do Point Sur entities hold directly?

Point Sur Investors Fund I, L.P. directly holds 228,470 shares and Point Sur Investors, LLC directly holds 252,320 shares, totaling 480,790 shares.