Magnite, Inc. (MGNI) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

154,292,308Shares Outstanding

150,560Shares held by institutions

$1,698,317Value of institutional holdings

13.40%Institutional ownership %

2.73%Shares Changed QoQ

94No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

A total of 94 institutions have reported a stake in Magnite, Inc. (NASDAQ:MGNI) as of December 2025, according to recent 13F filings with the SEC.

The collective stake of institutional investors in Magnite moved to 13.4% in December 2025, a shift down from the 92.4% reported for September 2025.
On a quarter-over-quarter basis, institutional holdings shifted by 2.73%, with a year-over-year a decrease of 66.43% in the count of filers.
Of these 94 institutional investors, 54 increased their holdings in Magnite, while 25 of them reduced positions, and 15 investors maintained their exposure.
The aggregate institutional position in Magnite now stands at 20.67Mn shares as of December 2025, after investors increased their holdings (up by 549.11K shares quarter on quarter which is down 105.65Mn shares year over year).
The top institutional stake in Magnite as of December 31, 2025 belongs to VANGUARD GROUP INC, which owns 14.80Mn shares, or 9.59% of the company.
Among the most significant buyers of Magnite during December 2025 were Kopion Asset Management, LLC (367.86K), Stephens Investment Management Group LLC (164.03K), UBS Group AG (152.74K), VANGUARD GROUP INC (148.20K), IMC-Chicago, LLC (133.10K).
Leading sellers of Magnite stock in December 2025 included Universal- Beteiligungs- und Servicegesellschaft mbH (283.36K), First Eagle Investment Management, LLC (279.00K), Dana Investment Advisors, Inc. (154.19K), MOODY NATIONAL BANK TRUST DIVISION (101.61K), Nippon Life Global Investors Americas, Inc. (88.17K).
The top 10 institutional holders of Magnite for the quarter ending December 2025 included VANGUARD GROUP INC (14.80Mn), Stephens Investment Management Group LLC (1.13Mn), Kopion Asset Management, LLC (614.46K), UBS Group AG (578.01K), NORDEA INVESTMENT MANAGEMENT AB (445.02K), First Eagle Investment Management, LLC (296.44K), Dana Investment Advisors, Inc. (254.94K), PRINCIPAL FINANCIAL GROUP INC (237.22K), HARBOR CAPITAL ADVISORS, INC. (214.25K), WEDGE CAPITAL MANAGEMENT L L P/NC (189.90K).

313 Institutional Holders

150,560 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
FMR LLC	30 Sep, 2025	17,141,014	-44,925	-0.26%	$373,331,284.00
VANGUARD GROUP INC	30 Sep, 2025	14,654,432	1,092,147	8.05%	$319,173,529.00
BlackRock, Inc.	30 Sep, 2025	11,413,155	715,111	6.68%	$248,578,526.00
Capital Research Global Investors	30 Sep, 2025	6,982,861	-5,937,209	-45.95%	$152,086,713.00
WELLINGTON MANAGEMENT GROUP LLP	30 Sep, 2025	5,144,549	-303,288	-5.57%	$112,048,278.00
AMERICAN CENTURY COMPANIES INC	30 Sep, 2025	4,594,070	-235,127	-4.87%	$100,058,887.00
Boston Partners	30 Sep, 2025	4,449,004	-1,125,600	-20.19%	$95,207,440.00
Granahan Investment Management, LLC	30 Sep, 2025	3,873,179	230,393	6.32%	$84,357,839.00
DIMENSIONAL FUND ADVISORS LP	30 Sep, 2025	3,567,254	-1,334,579	-27.23%	$77,700,093.00
GEODE CAPITAL MANAGEMENT, LLC	30 Sep, 2025	3,399,093	182,251	5.67%	$74,042,436.00
STATE STREET CORP	30 Sep, 2025	3,126,790	73,183	2.40%	$68,101,486.00
Nuveen, LLC	30 Sep, 2025	3,092,036	-159,056	-4.89%	$67,344,545.00
Nine Ten Capital Management LLC	30 Sep, 2025	2,858,583	0	0.00%	$62,260,000.00
PRICE T ROWE ASSOCIATES INC /MD/	30 Sep, 2025	2,547,505	2,429,904	2,066.23%	$55,486.00
GOLDMAN SACHS GROUP INC	30 Sep, 2025	2,385,439	470,039	24.54%	$51,954,861.00
Edenbrook Capital, LLC	30 Sep, 2025	2,110,370	-1,499,602	-41.54%	$45,963,859.00
Caption Management, LLC	30 Sep, 2025	2,069,700	482,700	30.42%	$45,078,066.00
MORGAN STANLEY	30 Sep, 2025	2,046,237	875,682	74.81%	$44,567,069.00
Squarepoint Ops LLC	30 Sep, 2025	1,943,869	-7,731	-0.40%	$42,337,467.00
Blue Grotto Capital, LLC	30 Sep, 2025	1,548,796	1,263,992	443.81%	$33,732,776.00

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Magnite, Inc. (MGNI) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

313 Institutional Holders

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