Who Owns QUANTUM CORP (QMCO)? -- Institutional Holders (2026-06-30)

72 institutions reported holding $165.6M of QUANTUM CORP (QMCO) in SEC 13F filings for 2026-06-30. Largest institutional holders: Alyeska Investment Group, L.P. ($29.2M), Two Seas Capital LP ($27.4M), OAKTREE CAPITAL MANAGEMENT LP ($22.1M), NEUBERGER BERMAN GROUP LLC ($12.8M), Portolan Capital Management, LLC ($11.2M). Source: SEC Form 13F.

Rank	Institution	Value	Shares	Change
1	Alyeska Investment Group, L.P.	$29.2M	2.7M	New
2	Two Seas Capital LP	$27.4M	2.5M	New
3	OAKTREE CAPITAL MANAGEMENT LP	$22.1M	2.0M	New
4	NEUBERGER BERMAN GROUP LLC	$12.8M	1.2M	New
5	Portolan Capital Management, LLC	$11.2M	1.0M	New
6	ASHFORD CAPITAL MANAGEMENT INC	$10.6M	1.0M	New
7	MARSHALL WACE, LLP	$7.8M	713,075	Added
8	VANGUARD GROUP INC	$7.7M	700,666	Added
9	Manatuck Hill Partners, LLC	$3.9M	350,000	New
10	BlackRock, Inc.	$3.0M	273,030	Added
11	SONA ASSET MANAGEMENT (US) LLC	$2.8M	250,100	Added
12	JANE STREET GROUP, LLC	$2.3M	208,500	New
13	SUSQUEHANNA INTERNATIONAL GROUP, LLP	$2.2M	200,075	New
14	Cinctive Capital Management LP	$2.0M	182,769	New
15	BANK OF AMERICA CORP /DE/	$1.9M	170,130	Added
16	GEODE CAPITAL MANAGEMENT, LLC	$1.8M	164,600	Added
17	RENAISSANCE TECHNOLOGIES LLC	$1.7M	154,516	New
18	CITADEL ADVISORS LLC	$1.5M	136,800	New
19	Walleye Capital LLC	$1.3M	120,044	New
20	RAYMOND JAMES FINANCIAL INC	$1.1M	103,836	New
21	Centiva Capital, LP	$1.1M	100,000	New
22	KKM Financial LLC	$960,515	90,274	New
23	Qube Research & Technologies Ltd	$890,747	80,977	New
24	STATE STREET CORP	$835,054	75,914	Added
25	SIMPLEX TRADING, LLC	$823,900	74,900	New

来源：SEC 13F 申报文件 · 截至 2026-06-30