Magnite, Inc. (MGNI) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

0Shares Outstanding

13,553,542Shares held by institutions

$156,746,713Value of institutional holdings

102.28%Institutional ownership %

16.09%Shares Changed QoQ

281No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Magnite, Inc. (NASDAQ:MGNI) showed up in the 13F filings of 296 institutional investors as of December 2025.

These investors collectively held 88.8% of Magnite's outstanding shares in December 2025, down from 91.8% in September 2025.
They increased total shares held in Magnite by 3.74% from the prior quarter, while the number of investors in MGNI increased 5.71% year over year.
Of these 296 holders, 177 added to their stakes in Magnite, 87 trimmed positions, and 32 made no changes.
The aggregate institutional position in Magnite amounted to 135.97Mn shares as of December 2025, up by 4.9Mn shares quarter on quarter, and up 9.28Mn shares year over year.
As of December 31, 2025, the biggest holder of Magnite is VANGUARD GROUP INC at 14.8Mn shares, representing 9.66% of shares outstanding.
Top purchasers of MGNI stock for the quarter ending December 2025 included Capital Research Global Investors (5.94Mn), WELLINGTON MANAGEMENT GROUP LLP (3.48Mn), Ophir Asset Management Pty Ltd (2.38Mn), No Street GP LP (1.48Mn), 325 CAPITAL LLC (1.36Mn).
Leading sellers of Magnite shares for the quarter ending December 2025 were FMR LLC (10.44Mn), Jpmorgan Chase & Co (1.91Mn), Bank Of America Corp /De/ (940.54K), TUDOR INVESTMENT CORP ET AL (863.54K), Granahan Investment Management, LLC (757.25K).
Magnite's 10 largest shareholders as of December 2025 include VANGUARD GROUP INC (14.8Mn), Capital Research Global Investors (12.92Mn), BlackRock, Inc. (11.59Mn), WELLINGTON MANAGEMENT GROUP LLP (8.63Mn), FMR LLC (6.7Mn), AMERICAN CENTURY COMPANIES INC (5.29Mn), Boston Partners (4.11Mn), DIMENSIONAL FUND ADVISORS LP (3.62Mn), Nuveen, LLC (3.53Mn), GEODE CAPITAL MANAGEMENT, LLC (3.43Mn) per Business Quant data.

296 Institutional Holders

13,553,542 Total Shares Held

Rows:

Download Data

Owner Name	Date	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	180,094	1.58%	$0.00
VANGUARD GROUP INC	31 Dec, 2025	148,198	1.01%	$0.00
Nuveen, LLC	31 Dec, 2025	439,072	14.20%	$0.00
Barclays Plc	31 Dec, 2025	-54,863	-13.02%	$0.00
Capital Research Global Investors	31 Dec, 2025	5,937,428	85.03%	$0.00
Nine Ten Capital Management LLC	31 Dec, 2025	145,000	5.07%	$0.00
HSBC HOLDINGS PLC	31 Dec, 2025	63,239	149.40%	$0.00
WELLINGTON MANAGEMENT GROUP LLP	31 Dec, 2025	3,484,689	67.74%	$0.00
Edenbrook Capital, LLC	31 Dec, 2025	677,666	32.11%	$0.00
Rockefeller Capital Management L.P.	31 Dec, 2025	15,538	1,227.33%	$0.00
FMR LLC	31 Dec, 2025	-10,439,840	-60.91%	$0.00
Ophir Asset Management Pty Ltd	31 Dec, 2025	2,384,187	0.00%	$0.00
AMERICAN CENTURY COMPANIES INC	31 Dec, 2025	692,858	15.08%	$0.00
325 CAPITAL LLC	31 Dec, 2025	1,355,326	208.49%	$0.00
Boston Partners	31 Dec, 2025	-340,111	-7.64%	$0.00
Blue Grotto Capital, LLC	31 Dec, 2025	79,986	5.16%	$0.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	48,566	1.36%	$0.00
No Street GP LP	31 Dec, 2025	1,475,000	0.00%	$0.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	34,969	1.03%	$0.00
Maestria Partners LLC	31 Dec, 2025	222,334	19.48%	$0.00

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