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Who Owns Magnite Inc (MGNI)? -- Institutional Holders (2026-06-30)

343 institutions reported holding $2.88B of Magnite Inc (MGNI) in SEC 13F filings for 2026-06-30. Largest institutional holders: VANGUARD GROUP INC ($296.9M), BlackRock, Inc. ($241.3M), FMR LLC ($147.3M), WELLINGTON MANAGEMENT GROUP LLP ($114.7M), DIMENSIONAL FUND ADVISORS LP ($99.8M). Source: SEC Form 13F.

RankInstitutionValueSharesChange
1VANGUARD GROUP INC$296.9M15.6MAdded
2BlackRock, Inc.$241.3M12.7MAdded
3FMR LLC$147.3M7.8MAdded
4WELLINGTON MANAGEMENT GROUP LLP$114.7M6.0MTrimmed
5DIMENSIONAL FUND ADVISORS LP$99.8M5.3MAdded
6Boston Partners$95.9M5.0MAdded
7AMERICAN CENTURY COMPANIES INC$87.7M4.6MTrimmed
8Capital Research Global Investors$73.4M3.9MTrimmed
9Nuveen, LLC$72.0M3.8MAdded
10GEODE CAPITAL MANAGEMENT, LLC$71.9M3.8MAdded
11Edenbrook Capital, LLC$67.5M3.6MAdded
12STATE STREET CORP$67.0M3.5MAdded
13325 CAPITAL LLC$64.8M3.4MAdded
14Nine Ten Capital Management LLC$61.9M3.3MTrimmed
15Granahan Investment Management, LLC$58.5M3.1MAdded
16CANADA PENSION PLAN INVESTMENT BOARD$56.8M3.0MAdded
17JANE STREET GROUP, LLC$45.3M2.4MAdded
18Park West Asset Management LLC$42.7M2.2MAdded
19Caption Management, LLC$38.0M2.0MAdded
20MORGAN STANLEY$37.8M2.0MAdded
21CITADEL ADVISORS LLC$37.6M2.0MTrimmed
22Qube Research & Technologies Ltd$37.1M2.0MAdded
23Blue Grotto Capital, LLC$32.4M1.7MAdded
24KENNEDY CAPITAL MANAGEMENT LLC$31.6M1.7MTrimmed
25NORTHERN TRUST CORP$29.5M1.6MAdded

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