Ownership

Who owns CAMP4 Therapeutics Corp, from the filings themselves: stakes over 5% (Schedule 13D/G), the institutional managers reporting the stock each quarter (13F), and the funds holding it (N-PORT).

Stakes over 5%

Investors crossing 5% ownership must disclose it. Schedule 13G filers certify the stake is passive; Schedule 13D is the general form for everyone else — founders, strategic holders, and activists alike. Each entry is the holder's most recent disclosure. Coverage begins with SEC's structured filings from December 18, 2024; a holder appears once they file or amend after that date.

5AM Ventures VI, L.P., 5AM Partners VI, LLC, 5AM Ventures VII, L.P. August 31, 2026

5AM Ventures VI, L.P.: 3.2% · 2,033,270 shares — 5AM Partners VI, LLC: 3.2% · 2,033,270 shares — 5AM Ventures VII, L.P.: 6.3% · 4,034,085 shares

View filing (SCHEDULE 13D/A) Amendment #3

Polaris Management Co. VII, L.L.C., Polaris Partners VII, L.P., Polaris Entrepreneurs' Fund VII, L.P. August 19, 2026

Polaris Management Co. VII, L.L.C.: 4.8% · 3,023,161 shares — Polaris Partners VII, L.P.: 4.5% · 2,825,500 shares — Polaris Entrepreneurs' Fund VII, L.P.: 0.3% · 197,661 shares

View filing (SCHEDULE 13D/A) Amendment #2

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Super investors holding CAMP

Every institutional manager whose latest 13F reports this stock, largest position first. "% of their portfolio" is the weight inside that manager's own book — how much conviction the position represents; "% of company" is how much of CAMP4 Therapeutics Corp they hold. Together these 77 managers report 81.01% of shares outstanding.

Investor	Position value	Shares	% of their portfolio	% of company	As of
JANUS HENDERSON GROUP PLC	$27.9M	6,307,636	0.01%	10.05%	March 31, 2026
Jupiter Topco LLC	$27.6M	6,307,636	0.01%	10.05%	June 30, 2026

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Funds holding CAMP

Funds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together these 36 funds hold 6.76% of shares outstanding — counted inside the manager totals above, not on top of them, since a fund's shares also appear in its manager's 13F.

Fund	Position value	% of net assets	% of company	As of
Select Biotechnology Portfolio	$5.95M	0.11%	2.11%	February 28, 2026
VANGUARD TOTAL STOCK MARKET INDEX FUND	$4.98M	0.00%	1.82%	June 30, 2026

34 more funds behind a free account

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