BOLD — Boundless Bio Inc Institutional Holders · Q2 2026

Name: Who Owns BOLD? 46 Institutions Hold $38.3M (Q2 2026)
Creator: ko.io

Who owns Boundless Bio Inc (BOLD)? 46 institutions reported holding $38.25M in SEC 13F filings for Q2 2026 (period ended 2026-06-30). Largest holders: ARCH Venture Management, LLC ($6.7M), FMR LLC ($6.5M), Tang Capital Management LLC ($6.4M).

Rank	Institution	Value	Shares	Change
1	ARCH Venture Management, LLC	$6.7M	2.7M	New
2	FMR LLC	$6.5M	2.6M	Trimmed
3	TANG CAPITAL MANAGEMENT LLC	$6.4M	2.6M	New
4	ADAR1 Capital Management, LLC	$4.9M	2.0M	New
5	Cormorant Asset Management, LP	$2.5M	1.0M	New
6	VANGUARD GROUP INC	$1.7M	680,059	Added
7	WELLINGTON MANAGEMENT GROUP LLP	$1.4M	556,233	Hold
8	MILLENNIUM MANAGEMENT LLC	$1.2M	478,639	Added
9	RENAISSANCE TECHNOLOGIES LLC	$1.2M	471,570	Added
10	Alyeska Investment Group, L.P.	$750,000	300,000	Hold
11	Affinity Asset Advisors, LLC	$625,000	250,000	New
12	RBF Capital, LLC	$500,000	200,000	Hold
13	Ensign Peak Advisors, Inc	$399,588	159,835	Trimmed
14	Stonepine Capital Management, LLC	$386,488	154,595	Trimmed
15	ACADIAN ASSET MANAGEMENT LLC	$365,000	146,757	Added
16	CITADEL ADVISORS LLC	$362,623	145,049	Trimmed
17	BRIDGEWAY CAPITAL MANAGEMENT, LLC	$320,000	128,000	Added
18	GEODE CAPITAL MANAGEMENT, LLC	$291,839	116,736	Trimmed
19	HRT FINANCIAL LP	$290,000	116,288	New
20	BlackRock, Inc.	$221,239	88,495	Added
21	PRELUDE CAPITAL MANAGEMENT, LLC	$209,995	83,998	New
22	Rangeley Capital, LLC	$185,000	74,000	New
23	GSA CAPITAL PARTNERS LLP	$181,000	72,353	Trimmed
24	JANE STREET GROUP, LLC	$160,807	64,323	New
25	SUPERSTRING CAPITAL MANAGEMENT LP	$138,390	55,356	New

Source: SEC Form 13F filings · as of 2026-06-30