[Form 4] CAMP4 Therapeutics Corporation Insider Trading Activity

Rhea-AI Filing Summary

Polaris-related investors purchased shares of Camp4 Therapeutics in a private placement on September 11, 2025. Polaris Partners VII, L.P. and Polaris Entrepreneurs' Fund VII, L.P. acquired common stock at $1.53 per share under a Securities Purchase Agreement dated September 9, 2025. Reported purchases include 1,221,721 shares and 85,468 shares respectively. After the transactions, the filing shows beneficial holdings attributed indirectly to Polaris entities totaling 2,825,500 shares, 197,661 shares, and an additional 909,090 shares held by related Polaris funds or entities. Multiple Polaris-affiliated entities and named managing members disclaim beneficial ownership except for pecuniary interests.

Positive

• Material participation in a private placement by Polaris funds at $1.53 per share demonstrates continued investor support
• Significant aggregate holdings reported (including 1,221,721 shares acquired) which could strengthen investor alignment and access to follow-on financing

Negative

• None.

Insights

Securities Analyst

TL;DR: Significant private-placement purchases by Polaris funds increase their stake at $1.53, signaling committed investor support.

The filing documents a private placement where affiliated Polaris funds acquired Camp4 common stock at $1.53 per share. The largest reported acquisition was 1,221,721 shares, with additional smaller allocations. Combined reported holdings assigned to Polaris-related entities and partnerships represent material single-entity positions that could influence governance or future financing dynamics. The repeated disclaimer language is standard for fund structures but confirms voting and dispositive power may be shared among managing members. For investors, the transaction is a clear indicator of continued backing from a strategic venture investor.

Corporate Governance Expert

TL;DR: Disclosure shows layered ownership and standard disclaimer language; potential shared control but no explicit transfer of director status.

The Form 4 lists multiple Polaris entities and named managing members with indirect ownership and customary disclaimers. The report clarifies which vehicles directly hold the shares and identifies the management entities that may have shared voting, investment, and dispositive power. While the filing does not state any change in board composition, the scale of holdings could affect future governance votes. The multiple signatures by counsel and attorneys-in-fact reflect centralized execution rather than individual transactions.

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

OMB APPROVAL

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X

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^*

Polaris Management Co. VII, L.L.C.

(Last) (First) (Middle)

ONE MARINA PARK DRIVE, 8TH FLOOR

(Street)

BOSTON MA 02210

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Camp4 Therapeutics Corp [ CAMP ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
09/11/2025

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

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

	Form filed by One Reporting Person
X	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	09/11/2025		P(1)		1,221,721	A	$1.53	2,825,500	I	See footnote(2)
Common Stock	09/11/2025		P(1)		85,468	A	$1.53	197,661	I	See footnote(3)
Common Stock								909,090	I	See footnote(4)

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

1. Name and Address of Reporting Person^*

Polaris Management Co. VII, L.L.C.

(Last) (First) (Middle)

ONE MARINA PARK DRIVE, 8TH FLOOR

(Street)

BOSTON MA 02210

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Polaris Partners VII, L.P.

(Last) (First) (Middle)

ONE MARINA PARK DRIVE, 8TH FLOOR

(Street)

BOSTON MA 02210

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Polaris Entrepreneurs' Fund VII, L.P.

(Last) (First) (Middle)

ONE MARINA PARK DRIVE 8TH FLOOR

(Street)

BOSTON MA 02210

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Polaris Partners X, L.P.

(Last) (First) (Middle)

ONE MARINA PARK DRIVE, 8TH FLOOR

(Street)

BOSTON MA 02210

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Polaris Partners GP X, L.L.C.

(Last) (First) (Middle)

ONE MARINA PARK DRIVE, 8TH FLOOR

(Street)

BOSTON MA 02210

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

SCHULMAN AMY W

(Last) (First) (Middle)

ONE MARINA PARK DRIVE, 8TH FLOOR

(Street)

BOSTON MA 02210

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Chee Brian

(Last) (First) (Middle)

ONE MARINA PARK DRIVE, 8TH FLOOR

(Street)

BOSTON MA 02210

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

Explanation of Responses:

1. On September 11, 2025, each of Polaris Partners VII, L.P. ("PP VII") and Polaris Entrepreneurs' Fund VII, L.P. ("PEF VII") acquired shares in a private placement by the Issuer pursuant to the terms of a Securities Purchase Agreement, dated as of September 9, 2025, by and among the Issuer and the investors party thereto at a purchase price of $1.53 per share.

2. The reported securities are owned directly by PP VII. Polaris Management Co. VII, L.L.C. ("PMC VII") is the general partner of PP VII. Each of David Barrett, Brian Chee, Amir Nashat, a member of the Issuer's board of directors, and Bryce Youngren (collectively, the "PMC VII Managing Members") are the managing members of PMC VII. Each of PMC VII and the PMC VII Managing Members in their respective capacities with respect to PMC VII, may be deemed to have shared voting, investment and dispositive power with respect to the securities held by PP VII. Each of PMC VII and the PMC VII Managing Members disclaims beneficial ownership of these securities and this report shall not be deemed an admission that any one of the PMC VII Managing Members or PMC VII is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

3. The reported securities are owned directly by PEF VII. PMC VII is the general partner of PEF VII. Each of PMC VII and the PMC VII Managing Members in their respective capacities with respect to PMC VII, may be deemed to have shared voting, investment and dispositive power with respect to the securities held by PEF VII. Each of PMC VII and the PMC VII Managing Members disclaims beneficial ownership of these securities and this report shall not be deemed an admission that any one of the PMC VII Managing Members or PMC VII is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

4. The reported securities are owned directly by Polaris Partners X, L.P. ("PP X"). Polaris Partners GP X, L.L.C. ("PPGP X") is the general partner of PP X. Each of Amy Schulman and Brian Chee are the managing members of PPGP X (the "PPGP X Managing Members"). Amir Nashat ("Mr. Nashat"), a member of the Issuer's board of directors, is an interest holder of PPGP X. Each of PPGP X, the PPGP X Managing Members and Mr. Nashat, in their respective capacities with respect to PPGP X, may be deemed to have shared voting, investment and dispositive power with respect to the securities held by PP X. Each of PPGP X, the PPGP X Managing Members and Mr. Nashat disclaims beneficial ownership of these securities and this report shall not be deemed an admission that any one of the PPGP X Managing Members, Mr. Nashat or PPGP X is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

	/s/ Lauren Crockett, as attorney-in-fact for Polaris Management Co. VII, L.L.C., general partner of Polaris Partners VII, L.P.	09/11/2025
	/s/ Lauren Crockett, as attorney-in-fact for Polaris Management Co. VII, L.L.C.	09/11/2025
	/s/ Lauren Crockett, as attorney-in-fact for Polaris Management Co. VII, L.L.C., general partner of Polaris Entrepreneurs' Fund VII, L.P.	09/11/2025
	/s/ Lauren Crockett, as general counsel of Polaris Partners GP X, L.L.C., general partner of Polaris Partners X, L.P.	09/11/2025
	/s/ Lauren Crockett, as general counsel of Polaris Partners GP X, L.L.C.	09/11/2025
	/s/ Lauren Crockett, as attorney-in-fact for Brian Chee	09/11/2025
	/s/ Lauren Crockett, as attorney-in-fact for Amy Schulman	09/11/2025
	** 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 transactions did Polaris-affiliated entities report for CAMP on September 11, 2025?

Polaris Partners VII, L.P. acquired 1,221,721 shares and Polaris Entrepreneurs' Fund VII, L.P. acquired 85,468 shares in a private placement at $1.53 per share.

How many Camp4 shares are reported as beneficially owned by Polaris-related entities after the transaction?

The filing reports post-transaction beneficial holdings of 2,825,500 shares, 197,661 shares, and an additional 909,090 shares held by related Polaris entities.

Was the purchase part of a registered offering or a private placement?

The shares were acquired in a private placement pursuant to a Securities Purchase Agreement dated September 9, 2025.

Do the Polaris managing members claim direct beneficial ownership of the shares?

No. The filing includes standard disclaimers where PMC VII and the managing members disclaim beneficial ownership except to the extent of pecuniary interests.

Who executed the Form 4 filings on behalf of the reporting persons?

All signatures were executed by Lauren Crockett acting in various attorney-in-fact and counsel capacities on September 11, 2025.