Ownership

Who owns CARGO Therapeutics, Inc., 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.

Exited (13G) RTW Investments, LP, Roderick Wong November 14, 2025

RTW Investments, LP: 0.0% · 0 shares — Roderick Wong: 0.0% · 0 shares

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

Exited (13G) Madison Avenue Partners, LP, Madison Avenue International LP, EMAI Management, LLC November 14, 2025

Madison Avenue Partners, LP: 0.0% · 0 shares — Madison Avenue International LP: 0.0% · 0 shares — EMAI Management, LLC: 0.0% · 0 shares

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

8 more 5% stakes behind a free account

See every investor who has disclosed crossing 5% of CARGO Therapeutics, Inc..

Super investors holding CARGO Therapeutics, Inc.

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 CARGO Therapeutics, Inc. they hold. Together these 142 managers report 110.60% of shares outstanding.

Investor	Position value	Shares	% of their portfolio	% of company	As of
FMR LLC	$28.5M	6,916,945	0.00%	14.30%	June 30, 2025
SAMSARA BIOCAPITAL, LLC	$18.2M	4,415,689	3.72%	9.13%	June 30, 2025

140 more institutional holders behind a free account

See every manager reporting CARGO Therapeutics, Inc., how much of the company they hold, and how big the position is inside their own portfolio.

Funds holding CARGO Therapeutics, Inc.

Funds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together these 2 funds hold 0.00% 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
Knights of Columbus U.S. ALL CAP INDEX FUND	$14.8	0.00%	0.00%	April 30, 2026
SIMT LARGE CAP INDEX FUND	$0.01	0.00%	0.00%	June 30, 2026