Investors with the most 13D stakes

The investors that hold more than 5% of the most companies under Schedule 13D, the form for holders who may try to influence a company: activist funds, but also parents, partners and specialist biotech investors. Counted when the investor's latest filing on that company is a 13D and was filed in the two years to Oct 15, 2026. From SEC EDGAR.

Top 100

Click a column heading to sort. Companies are those where the investor's latest filing is of this kind; the most recent three are named.

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#	Investor	Companies	Including	Filings	Latest filing
1	GAMCO Investors	64	Beasley Broadcast Group, Tennant Company, Neostellar Capital Corp. and 61 more	276	Oct 2, 2026
2	Saba Capital Management, L.P.	56	Japan Smaller Capitalization Fund Inc, Virtus Dividend, Interest & Premium Strategy Fund, BlackRock TCP Capital Corp. and 53 more	547	Oct 15, 2026
3	Bank of America	30	Nuveen Minnesota Quality Municipal Income Fund, Nuveen Quality Municipal Income Fund, Nuveen Municipal Credit Opportunities Fund and 27 more	114	Oct 15, 2026
4	Orbimed Advisors LLC	28	ArriVent BioPharma, Inc., ADARx Pharmaceuticals, Inc., Electra Therapeutics, Inc. and 25 more	97	Oct 8, 2026
5	Ra Capital Management, L.P.	25	Sionna Therapeutics, Inc., Tyra Biosciences, Inc., Septerna, Inc. and 22 more	137	Sep 21, 2026
6	Starboard Value LP	12	Qorvo, Bill.com, LLC, Bloomin' Brands and 9 more	60	Oct 6, 2026
7	Baker Bros. Advisors LP	12	Kodiak Sciences Inc., BeOne Medicines Ltd., Replimune Group, Inc. and 9 more	54	Sep 30, 2026
8	Carl C. Et Al Icahn	11	Icahn Enterprises, JetBlue Airways, Enzon Pharmaceuticals and 8 more	88	Sep 25, 2026
9	Joseph Stilwell	11	Catalyst Bancorp, Inc., Wheeler Real Estate Investment Trust, Inc., CSB Financial Inc. and 8 more	75	Aug 27, 2026
10	Fairmount Funds Management LLC	11	ZIOPHARM Oncology, Aeglea BioTherapeutics, Korsana Biosciences, Inc. and 8 more	56	Oct 15, 2026
11	Magnetar Financial LLC	11	Proassurance Corp, Comtech, Catabasis Pharmaceuticals and 8 more	33	Jun 30, 2026
12	Perceptive Advisors LLC	10	Kardigan, Inc., Immatics N.V., LeonaBio, Inc. and 7 more	65	Oct 1, 2026
13	Tether Global Investments Fund, S.I.C.A.F., S.A.	10	HUI Gold Index, Rumble, Gold Royalty Corp. and 7 more	65	Sep 8, 2026
14	Biotechnology Value Fund L P	10	Entera Bio Ltd., XOMA Royalty Corp, MoonLake Immunotherapeutics and 7 more	50	Aug 4, 2026
15	Radoff Bradley Louis	10	Harte Hanks, Genesco, Barnwell Industries Inc and 7 more	50	Aug 24, 2026
16	TPG GP A, LLC	10	Allogene Therapeutics, Inc., TPG, TPG Twin Brook Capital Income Fund and 7 more	38	Sep 30, 2026
17	John C. Malone	9	Liberty Broadband Corp, Liberty Latin America Ltd., Sirius XM Rad and 6 more	42	Aug 20, 2026
18	Samsara BioCapital, L.P.	9	Rani Therapeutics Holdings, Inc., Kalaris Therapeutics, Inc., Alumis INC. and 6 more	31	May 28, 2026
19	Galloway Capital Partners, LLC	9	WW International, Global Crossing Airlines Group Inc., Chegg and 6 more	17	May 13, 2026
20	Howard W. Lutnick	9	BGC Partners, Newmark Group, XBP Global Holdings, Inc. and 6 more	9	Oct 6, 2025
21	Fund 1 Investments, LLC	8	Xponential Fitness, Inc., Funko, Tillys and 5 more	85	Oct 7, 2026
22	Bpifrance Participations SA	8	Pasqal Holding SA, Constellium, Valneva SE and 5 more	30	Sep 3, 2026
23	Tang Capital Management LLC	8	Aurinia Pharmaceuticals Inc., Kezar Life Sciences, Inc., HilleVax, Inc. and 5 more	28	Jun 4, 2026
24	David E. Lazar	8	Aterian, Inc., Quantum Cyber N.V., Kala Pharmaceuticals (United States) and 5 more	22	Sep 29, 2026
25	Coliseum Capital Management, LLC	7	Sonos, Universal Technical Institute, MasterCraft Boat Holdings, Inc. and 4 more	87	Aug 3, 2026
26	Brookfield Corporation	7	Brookfield Infrastructure Partners, Brookfield Infrastructure Corp, Brookfield Renewable and 4 more	49	Jul 23, 2026
27	BML Investment Partners, L.P.	7	Avalanche Biotechnologies, Astrotech Corporation, ImageneBio, Inc. and 4 more	40	Dec 9, 2025
28	Impactive Capital LP	7	Marriott Vacations Worldwide Corporation, Asbury Automotive Group, Wright Express and 4 more	36	Aug 20, 2026
29	Global Value Investment Corp.	7	Loop Industries, Inc., Cps Technologies Corp, Liberty Defense Holdings, LTD. and 4 more	31	Jun 24, 2026
30	General Atlantic, L.P.	7	dLocal, Liftoff Mobile, Inc., Alkami Technology and 4 more	29	Aug 19, 2026
31	Tencent Holdings Ltd	7	Amer Sports, KE Holdings Inc., Global Blue Group Holding AG and 4 more	14	Aug 24, 2026
32	SR One Capital Management, LLC	7	ADARx Pharmaceuticals, Inc., Zenas BioPharma, Inc., Veradermics, Inc and 4 more	13	Oct 5, 2026
33	Fai Chan	6	Dss, INC., HWH International Inc., SHARING SERVICES GLOBAL Corp and 3 more	67	Sep 8, 2026
34	22NW Fund, LP	6	Lifecore Biomedical, INC. \de\, Farmer Brothers, Foster L B Co and 3 more	58	Jul 2, 2026
35	Star Equity Fund, LP	6	GEE Group Inc., Air Industries Group, Gyrodyne Company of America and 3 more	39	Aug 24, 2026
36	Pictet Asset Management Sa	6	Elastic, Dynatrace, Fortune Brands Home & Security and 3 more	32	Oct 6, 2026
37	Carlyle Group	6	Jasper Therapeutics, Inc., Spruce Biosciences, INC., Vistance Networks, Inc. and 3 more	31	Feb 18, 2026
38	Wells Fargo	6	Nuveen Quality Municipal Income Fund, Nuveen Municipal High Income Opportunity Fund, Alliancebernstein National Municipal Income Fund and 3 more	23	Sep 25, 2026
39	Howard Amster	6	Redwood Trust Inc, CBL Properties, Adamas Trust, INC. and 3 more	18	Sep 25, 2026
40	New Enterprise Associates 17, L.P.	6	Monte Rosa Therapeutics, Inventiva S.A., Korro Bio, Inc. and 3 more	16	Jul 6, 2026
41	Diveroli Investment Group LLC	6	WPCS International, PetMed Express, Battalion Oil Corp and 3 more	12	May 1, 2026
42	UAW Retiree Medical Benefits Trust	5	NC SLF Inc., Kayne DL 2021, Inc., Commonwealth Credit Partners BDC I, Inc. and 2 more	91	Sep 30, 2026
43	Abu Dhabi Investment Authority	5	AGL Private Credit Income Fund, ReNew Energy Global plc, Overland Advantage and 2 more	48	Sep 30, 2026
44	Elliott Investment Management L.P.	5	Seadrill, Triple Flag Precious Metals Corp., Southwest Airlines and 2 more	38	Oct 8, 2026
45	Davidson Kempner Capital Management LP	5	Angel Oak Mortgage REIT, Inc., Vacasa, Inc., Playa Hotels & Resorts N.V. and 2 more	35	Aug 6, 2026
46	James E. Flynn	5	Tessera Defense & Homeland Security Inc., Zafgen (United States), Silverback Therapeutics and 2 more	33	Jun 16, 2026
47	Pacific Investment Management Co LLC	5	FreightCar America, Clear Channel Outdoor, Mynaric and 2 more	32	Jul 2, 2026
48	EcoR1 Capital, LLC	5	Aktis Oncology, Inc., Zymeworks, Galápagos NV and 2 more	30	Jan 20, 2026
49	Redmile Group, LLC	5	Atara Biotherapeutics, Inc., Shattuck Labs, Inc., Fate Therapeutics and 2 more	30	Jul 24, 2026
50	JANA Partners Management, LP	5	Alkami Technology, Rapid7, Mercury Systems and 2 more	28	Jun 29, 2026
51	Canada Pension Plan Investment Board	5	ReNew Energy Global plc, California Resources Corporation, Civitas Resources, INC. and 2 more	27	Aug 11, 2026
52	Frazier Life Sciences Public Fund, L.P.	5	Attovia Therapeutics, Inc., MBX Biosciences, Inc., KalVista Pharmaceuticals, Inc. and 2 more	27	Aug 11, 2026
53	Philotimo Fund, LP	5	Allot Ltd, eGain, ONE Group Hospitality, Inc. and 2 more	26	Jun 25, 2026
54	Steel Partners Holdings L.P.	5	Spruce Power Holding Corp, KLX Energy Services Holdings, Inc., Green Dot Corporation and 2 more	26	Sep 23, 2026
55	James D. Dondero	5	Nexpoint Real Estate Strategies Fund, NexPoint Residential Trust, Inc., Highland Opportunities & Income Fund and 2 more	25	Sep 25, 2026
56	Phillip Et Al Frost Md.	5	Cocrystal Pharma, Inc., Opko Health Inc., Fluent, Inc. and 2 more	24	Aug 7, 2026
57	Cantor Fitzgerald, L. P.	5	XBP Global Holdings, Inc., Velos Acquisition I Corp., BGC Partners and 2 more	18	Sep 22, 2026
58	Nantahala Capital Management, LLC	5	Evoke Pharma Inc, Xtant Medical (United States), Aytu Biopharma, Inc and 2 more	18	Dec 19, 2025
59	Third Point LLC	5	Strata Critical Medical, Inc., Third Point Private Capital Partners, Flyexclusive INC. and 2 more	16	Oct 15, 2026
60	JCP Investment Management, LLC	5	Track Group, Inc., Barnwell Industries Inc, Red Robin and 2 more	10	May 5, 2026
61	Hyperscale Data, Inc.	4	Universal Safety Products, INC., YYForce Inc., Powercompute, INC. and 1 more	41	Oct 1, 2026
62	Lynrock Lake LP	4	Radcom Ltd, Yext, Teradata and 1 more	35	Sep 9, 2026
63	Bleichroeder LP	4	MDxHealth SA, INVE Technologies, Inc., Liqtech International Inc and 1 more	34	Oct 15, 2026
64	RTW Investments, LP	4	Allurion Technologies, INC., Orchestra BioMed Holdings, Inc., Avidity Biosciences, Inc. and 1 more	32	Sep 2, 2026
65	Cannae Holdings, Inc.	4	System1, Inc., Paysafe Group, Dun & Bradstreet Holdings, Inc. and 1 more	31	Dec 2, 2025
66	BRC Group Holdings, Inc	4	Biomerica Inc, Transact Technologies Inc, Babcock & Wilcox and 1 more	28	Aug 28, 2026
67	Mill Road Capital III, L.P.	4	Mistras Group, Inc., Alta Equipment Group INC., Landsea Homes Corp and 1 more	26	Sep 18, 2026
68	Versant Venture Capital VI, L.P.	4	Tempest Therapeutics, Inc., Monte Rosa Therapeutics, LENZ Therapeutics, Inc. and 1 more	26	Apr 2, 2026
69	Advent International, L.P.	4	Definitive Healthcare Corp., CCC, Waystar Holding Corp. and 1 more	23	Oct 1, 2026
70	Rollins Gary W	4	Rpc Inc, Rollins Inc., MasterCraft Boat Holdings, Inc. and 1 more	23	Sep 21, 2026
71	Liberty 77 Capital L.P.	4	Satellogic Inc., Starz Entertainment Corp /cn, Lionsgate Studios and 1 more	22	May 28, 2026
72	Novo Holdings A/S	4	MapLight Therapeutics, Inc., Edgewise Therapeutics, Inc., IO Biotech, Inc. and 1 more	22	Jul 31, 2026
73	Juniper Investment Company, LLC	4	Allient Inc, Lincoln Group of Schools, Orthofix Medical Inc. and 1 more	19	Aug 13, 2026
74	Gilead Sciences	4	Arcus Biosciences, Assembly Biosciences, INC., Arcellx, Inc. and 1 more	18	Aug 7, 2026
75	Apeiron Investment Group Ltd.	4	Enhanced Group Inc., AtaiBeckley Inc., Atai Beckley N.V. and 1 more	17	Sep 21, 2026
76	Franklin Martin E	4	APi Group Corp, Element Solutions, Nomad Foods Ltd and 1 more	17	May 6, 2026
77	Access Industries Management, LLC	4	DigitalOcean, Opendoor, ACELYRIN, Inc. and 1 more	16	Aug 6, 2026
78	Charles Frischer	4	Air Industries Group, Regional Health Properties, Inc, KINGSWAY Corp and 1 more	16	Mar 23, 2026
79	Engine Capital, L.P.	4	American Outdoor Brands, Inc., Civeo Corporation, Orthofix Medical Inc. and 1 more	16	Oct 7, 2026
80	MPM BioVentures 2014, L.P.	4	Entrada Therapeutics, Inc., Werewolf Therapeutics, Inc., iTeos Therapeutics, Inc. and 1 more	16	Sep 10, 2026
81	Sylebra Capital LLC	4	Aeva, Inc, PureCycle Technologies, Inc., 8x8 and 1 more	16	Jul 6, 2026
82	BlackRock Portfolio Management LLC	4	Global Business Travel Group, Inc., Clearway Energy, Inc., Mediaco Holding Inc. and 1 more	15	May 5, 2026
83	General Motors	4	Lithium Argentina AG, Lithium Americas, SES AI Corp and 1 more	14	Mar 30, 2026
84	Hoak Public Equities, LP	4	Turtle Beach Corp, Natural Gas Services Group Inc, Saga Communications Inc and 1 more	14	Aug 11, 2026
85	James Lawrence Dolan	4	Madison Square Garden Sports Corp., Sphere Entertainment Co., Madison Square Garden Entertainment Corp. and 1 more	14	Mar 9, 2026
86	Paulson & Co. Inc.	4	Acadian Asset Management Inc., International Tower Hill Mines Ltd, Bausch Health and 1 more	14	Jun 22, 2026
87	MHR Fund Management LLC	4	Telesat, Lionsgate Studios, Starz Entertainment Corp /cn and 1 more	12	Jul 9, 2026
88	Pale Fire Capital SE	4	Commerce.com, Inc., Phreesia Inc., Angi Inc. and 1 more	12	Sep 9, 2026
89	ARCH Venture Fund XII, L.P.	4	Seaport Therapeutics, Inc., Neumora Therapeutics, Inc., Metsera, Inc. and 1 more	11	May 6, 2026
90	Standard Bank of South Africa LTD	4	Nedbank, British American Tobacco, Renergen Limited and 1 more	11	Jan 28, 2026
91	Atlas Venture Fund X, L.P.	4	Q32 Bio Inc., Disc Medicine, Inc., ImageneBio, Inc. and 1 more	10	May 28, 2026
92	Charles Dolan	4	Madison Square Garden Entertainment Corp., AMC Global Media, Sphere Entertainment Co. and 1 more	9	Dec 31, 2024
93	Enavate Sciences GP, LLC	4	Zenas BioPharma, Inc., Camp4 Therapeutics Corp, Immunome Inc. and 1 more	9	Aug 19, 2026
94	Longitude Capital Partners IV, LLC	4	Zenas BioPharma, Inc., CG Oncology, Inc., Vera Therapeutics, Inc. and 1 more	9	Oct 14, 2025
95	Anita G. Zucker	4	American Shared Hospital Services, Union Bankshares Inc, Community Bancorp /vt and 1 more	8	Jun 23, 2026
96	HoldCo Asset Management, LP	4	TrustCo Bank, Capitol Federal Savings Bank, Central Pacific Bank and 1 more	7	Jul 28, 2026
97	Alfred M. Et Al Rankin	3	Hamilton Beach Brands, Hyster-Yale Materials Handling, NACCO Industries	67	Jun 13, 2025
98	Two Seas Capital LP	3	Core Scientific, Odyssey Marine Exploration, Indivior	36	Apr 23, 2026
99	Trian Fund Management, L.P.	3	Janus Henderson Group Ltd., Wendy's Company, Invesco	35	Jun 30, 2026
100	Viking Global Investors LP	3	BridgeBio, Standard BioTools Inc., Cazoo	34	Jul 10, 2026

Showing the top 100 of 1,000. Download all 1,000 as CSV.

Source: Schedule 13D and 13G filings on SEC EDGAR. A holder must file once it owns more than 5% of a class of a company’s shares. A later amendment can report a stake that fell below 5%; we count the company until a newer filing of the other kind replaces it.