Magnite (MGNI) Institutional Ownership

$23.77 +0.22 (+0.93%)

Closing price 09/11/2026 04:00 PM Eastern

Extended Trading

$23.62 -0.15 (-0.63%)

As of 09/11/2026 07:58 PM Eastern

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Current Institutional Ownership Percentage: 73.40%
Number of Institutional Buyers (last 12 months): 184
Total Institutional Inflows (last 12 months): $999.69M

Number of Institutional Sellers (last 12 months): 102
Total Institutional Outflows (last 12 months): $586.67M

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MGNI Institutional Buying and Selling by Quarter

Magnite Major Shareholders & Ownership History

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Reporting Date	Major Shareholder Name	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
9/9/2026	Tidal Investments LLC	165,838	$3.15M	0.0%	+24.0%	0.116%
9/9/2026	WINTON GROUP Ltd	121,900	$2.31M	0.1%	N/A	0.085%
9/9/2026	Pinnacle Wealth Management Advisory Group LLC	14,863	$282K	0.0%	-34.2%	0.010%
9/9/2026	Nine Ten Capital Management LLC	3,261,283	$61.90M	19.3%	-6.3%	2.274%
9/8/2026	Allworth Financial LP	1,567	$30K	0.0%	+63.7%	0.001%
9/8/2026	Nykredit A S	1,306	$25K	0.0%	N/A	0.001%
8/27/2026	Corient Private Wealth LP	25,326	$481K	0.0%	N/A	0.018%
8/26/2026	Amundi	21,157	$402K	0.0%	-7.3%	0.015%
8/24/2026	California State Teachers Retirement System	3,265,452	$61.98M	0.0%	+1,749.8%	2.277%
8/22/2026	Maestria Partners LLC	1,158,430	$21.99M	7.6%	-15.0%	0.808%
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8/21/2026	Nykredit A S	1,306	$25K	0.0%	N/A	0.001%
8/20/2026	Two Sigma Securities LLC	21,097	$400K	0.0%	+75.4%	0.015%
8/20/2026	Alyeska Investment Group L.P.	326,839	$6.20M	0.0%	N/A	0.228%
8/20/2026	Northwestern Mutual Wealth Management Co.	15,245	$289K	0.0%	+408.2%	0.011%
8/20/2026	Greenwood Capital Associates LLC	34,891	$662K	0.1%	-5.2%	0.024%
8/19/2026	UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	364,638	$6.92M	0.0%	+12.9%	0.254%
8/19/2026	Wellington Management Group LLP	6,044,492	$114.72M	0.0%	-34.2%	4.215%
8/17/2026	Corient Private Wealth LP	17,309	$329K	0.0%	N/A	0.012%
8/17/2026	Parallax Volatility Advisers L.P.	16,743	$318K	0.0%	N/A	0.012%
8/17/2026	Pillsbury Lake Capital LLC	217,753	$4.13M	0.0%	N/A	0.152%
8/17/2026	Bank of America Corp DE	1,181,832	$22.43M	0.0%	N/A	0.824%
8/15/2026	Man Group plc	53,054	$1.01M	0.0%	N/A	0.037%
8/15/2026	Jupiter Topco LLC	58,423	$1.11M	0.0%	N/A	0.041%
8/15/2026	Meros Investment Management LP	991,335	$18.82M	0.0%	N/A	0.691%
8/14/2026	EFG International AG	1,500	$28K	0.0%	N/A	0.001%
8/14/2026	Canada Pension Plan Investment Board	2,995,093	$56.85M	0.0%	N/A	2.088%
8/14/2026	Manatuck Hill Partners LLC	450,000	$8.54M	2.8%	N/A	0.314%
8/14/2026	Legal & General Group Plc	117,006	$2.22M	0.0%	N/A	0.082%
8/14/2026	The Manufacturers Life Insurance Company	71,015	$1.35M	0.0%	N/A	0.050%
8/14/2026	S Squared Technology LLC	567,862	$10.78M	0.0%	N/A	0.396%
8/14/2026	Cetera Trust Company N.A	4,270	$81K	0.0%	N/A	0.003%
8/14/2026	Algert Global LLC	137,505	$2.61M	0.0%	-48.9%	0.096%
8/12/2026	Elevation Point Wealth Partners LLC	24,149	$458K	0.0%	N/A	0.017%
8/12/2026	Northwestern Mutual Wealth Management Co.	15,245	$289K	0.0%	N/A	0.011%
8/12/2026	Norwood Investment Partners LP	235,000	$4.46M	0.0%	N/A	0.164%
8/11/2026	Allworth Financial LP	1,567	$30K	0.0%	N/A	0.001%
8/11/2026	Lisanti Capital Growth LLC	289,030	$5.49M	1.2%	N/A	0.202%
8/10/2026	Great Lakes Advisors LLC	176,615	$3.35M	0.0%	N/A	0.123%
8/7/2026	Citizens Financial Group Inc. RI	82,383	$1.56M	0.0%	N/A	0.058%
8/7/2026	Buckland Partners Management Co LLC	31,446	$597K	0.3%	N/A	0.022%
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8/7/2026	BlackRock Inc.	12,713,156	$241.30M	0.0%	N/A	8.877%
8/7/2026	Deutsche Bank AG	165,040	$3.13M	0.0%	N/A	0.115%
8/7/2026	Rice Hall James & Associates LLC	283,919	$5.39M	0.3%	N/A	0.198%
8/7/2026	Persistent Asset Partners Ltd	5,815	$110K	0.0%	N/A	0.004%
8/6/2026	Bank of New York Mellon Corp	1,162,198	$22.06M	0.0%	N/A	0.812%
8/6/2026	State of Wyoming	22,273	$423K	0.0%	N/A	0.016%
7/10/2026	Handelsbanken Fonder AB	47,300	$898K	0.0%	+37.9%	0.033%
7/10/2026	Fulton Bank N.A.	33,041	$627K	0.0%	+7.5%	0.023%
7/7/2026	Harbor Investment Advisory LLC	3,265	$62K	0.0%	N/A	0.002%
7/7/2026	Central Pacific Bank Trust Division	5,000	$95K	0.0%	+100.0%	0.003%
7/7/2026	Moody National Bank Trust Division	97,202	$1.85M	0.2%	+82.3%	0.068%
7/7/2026	Kopion Asset Management LLC	674,451	$12.80M	8.1%	-21.2%	0.471%
7/2/2026	Versant Capital Management Inc	4,715	$89K	0.0%	-14.7%	0.003%
6/18/2026	Pacer Advisors Inc.	501,578	$5.96M	0.0%	N/A	0.350%
6/2/2026	Optiver Holding B.V.	5,579	$66K	0.0%	+2,746.4%	0.004%
5/19/2026	Bank of America Corp DE	1,125,196	$13.37M	0.0%	+72.6%	0.786%
5/18/2026	Amundi	22,817	$271K	0.0%	+74.8%	0.016%
5/18/2026	California State Teachers Retirement System	176,528	$2.10M	0.0%	+29.3%	0.123%
5/18/2026	Royal Bank of Canada	52,917	$628K	0.0%	-15.1%	0.037%
5/16/2026	The Manufacturers Life Insurance Company	64,558	$767K	0.0%	-1.6%	0.045%
5/16/2026	Quantinno Capital Management LP	128,133	$1.52M	0.0%	+144.3%	0.089%
5/15/2026	Rice Hall James & Associates LLC	192,808	$2.29M	0.1%	-3.0%	0.135%
5/15/2026	Granahan Investment Management LLC	2,553,413	$30.34M	1.5%	-18.1%	1.783%
5/15/2026	Entropy Technologies LP	24,761	$294K	0.0%	N/A	0.017%
5/14/2026	Gabelli Funds LLC	45,820	$544K	0.0%	+48.7%	0.032%
5/14/2026	Gamco Investors INC. ET AL	60,653	$721K	0.0%	+36.4%	0.042%
5/14/2026	Sei Investments Co.	350,862	$4.17M	0.0%	+65.9%	0.245%
5/13/2026	Cetera Investment Advisers	13,157	$156K	0.0%	-61.6%	0.009%
5/8/2026	PNC Financial Services Group Inc.	3,783	$45K	0.0%	+106.3%	0.003%
5/7/2026	Dimensional Fund Advisors LP	3,983,674	$47.32M	0.0%	+10.2%	2.782%
5/7/2026	Swiss National Bank	284,300	$3.38M	0.0%	+1.3%	0.199%
5/6/2026	Jennison Associates LLC	57,849	$687K	0.0%	N/A	0.040%
5/6/2026	Allspring Global Investments Holdings LLC	41,766	$492K	0.0%	+11.5%	0.029%
5/5/2026	Bank of New York Mellon Corp	1,138,217	$13.52M	0.0%	-3.8%	0.795%
5/4/2026	Principal Financial Group Inc.	445,950	$5.30M	0.0%	+88.0%	0.311%
5/1/2026	Fifth Third Bancorp	58,823	$699K	0.0%	N/A	0.041%
4/30/2026	Money Concepts Capital Corp	11,659	$139K	0.0%	N/A	0.008%
4/30/2026	Greenwood Capital Associates LLC	36,804	$437K	0.0%	-4.7%	0.026%
4/28/2026	Stephens Inc. AR	85,537	$1.02M	0.0%	-2.1%	0.060%
4/27/2026	Elevation Point Wealth Partners LLC	23,648	$281K	0.0%	N/A	0.017%
4/25/2026	Strs Ohio	18,500	$220K	0.0%	-47.4%	0.013%
4/24/2026	Perkins Capital Management Inc.	119,275	$1.42M	1.3%	-2.1%	0.083%
4/22/2026	1492 Capital Management LLC	340,542	$4.05M	1.5%	-0.3%	0.236%
4/22/2026	Pictet Asset Management Holding SA	25,755	$306K	0.0%	+13.8%	0.018%
4/21/2026	Pinnacle Wealth Management Advisory Group LLC	22,577	$268K	0.0%	-7.6%	0.016%
4/21/2026	Penbrook Management LLC	112,190	$1.33M	1.0%	+260.6%	0.078%
4/20/2026	Cardinal Point Capital Management ULC	94,950	$1.13M	0.1%	+38.6%	0.066%
4/20/2026	Ritholtz Wealth Management	10,334	$123K	0.0%	N/A	0.007%
4/20/2026	Blue Trust Inc.	29,073	$345K	0.0%	+5.8%	0.020%
4/20/2026	OP Asset Management Ltd	12,621	$150K	0.0%	N/A	0.009%
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4/16/2026	SG Americas Securities LLC	57,237	$680K	0.0%	-3.4%	0.040%
3/17/2026	Rockefeller Capital Management L.P.	8,402	$136K	0.0%	+563.7%	0.006%
2/19/2026	Invesco Ltd.	243,565	$3.95M	0.0%	-5.9%	0.170%
2/18/2026	Pillsbury Lake Capital LLC	583,644	$9.47M	3.3%	N/A	0.406%
2/18/2026	XTX Topco Ltd	46,663	$757K	0.0%	-42.7%	0.032%
2/18/2026	Wellington Management Group LLP	8,629,238	$140.05M	0.1%	+67.7%	6.007%
2/18/2026	Ophir Asset Management Pty Ltd	2,384,187	$38.70M	4.3%	N/A	1.660%
2/18/2026	Man Group plc	311,536	$5.06M	0.0%	N/A	0.217%
2/18/2026	Engineers Gate Manager LP	41,137	$668K	0.0%	N/A	0.029%
2/18/2026	Balyasny Asset Management L.P.	873,208	$14.17M	0.0%	+6,775.7%	0.608%

MGNI Institutional Ownership - Frequently Asked Questions

During the previous two years, 338 institutional investors and hedge funds held shares of Magnite. The most heavily invested institutionals were BlackRock Inc. ($241.30M), Vanguard Group Inc. ($240.25M), Capital Research Global Investors ($209.70M), Wellington Management Group LLP ($114.72M), American Century Companies Inc. ($100.06M), Edenbrook Capital LLC ($87.07M), and Boston Partners ($66.60M).Learn more on Magnite's institutional investors.

73.40% of Magnite's stock is owned by institutional investors. Learn more on MGNI's institutional investor holdings.

Of the 296 institutional investors that purchased Magnite's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Capital Research Global Investors ($13.66M), BlackRock Inc. ($12.71M), Wellington Management Group LLP ($7.59M), American Century Companies Inc. ($4.54M), Nuveen LLC ($4.04M), California State Teachers Retirement System ($3.14M), and Canada Pension Plan Investment Board ($3.00M).

Institutional investors have bought a total of 55,301,656 shares in the last 24 months. This purchase volume represents approximately $999.69M in transactions.

Of the 102 institutional investors that sold Magnite's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Capital Research Global Investors ($5.94M), Wellington Management Group LLP ($5.87M), Wells Fargo & Company MN ($2.32M), Price T Rowe Associates Inc. MD ($1.84M), Universal Beteiligungs und Servicegesellschaft mbH ($1.51M), Boston Partners ($1.47M), and Dimensional Fund Advisors LP ($1.33M).

Institutional investors have sold a total of 30,419,530 shares in the last 24 months. This volume of shares sold represents approximately $586.67M in transactions.

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Institutional ownership data for NASDAQ:MGNI is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 9/9/2026. New 13F filings are added each quarter as they're published.

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Magnite (MGNI) Institutional Ownership

MGNI Institutional Buying and Selling by Quarter

Magnite Major Shareholders & Ownership History

MGNI Institutional Ownership - Frequently Asked Questions

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Magnite (MGNI) Institutional Ownership

Institutional Ownership Changes (13F Filings) for Magnite (NASDAQ:MGNI)

MGNI Institutional Buying and Selling by Quarter

Magnite Major Shareholders & Ownership History

MGNI Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of MGNI shares?

What percentage of Magnite's stock is owned by institutional investors?

Which institutional investors have been buying Magnite's stock?

How much institutional buying is happening at Magnite?

Which of Magnite's major shareholders have been selling company stock?

How much institutional selling is happening at Magnite?

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