O'Shaughnessy Asset Management
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O'Shaughnessy Asset Management’s Magnite MGNI Stock Holding History

O'Shaughnessy Asset Management’s Portfolio MGNI Stock Details MGNI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-10,677
Closed -$233K – 2708
2025
Q3 		$233K Buy
+10,677
New +$252K ﹤0.01% 1895
2025
Q1 		– Sell
-11,153
Closed -$178K – 2358
2024
Q4 		$178K Sell
11,153
-1,694
-13% -$24.9K ﹤0.01% 1776
2024
Q3 		$159K Buy
12,847
+2,449
+24% +$33.4K ﹤0.01% 1726
2024
Q2 		$138K Buy
10,398
+379
+4% +$4.14K ﹤0.01% 1608
2024
Q1 		$108K Buy
+10,019
New +$100K ﹤0.01% 1589
2021
Q4 		– Sell
-4,935
Closed -$138K – 1970
2021
Q3 		$138K Buy
4,935
+852
+21% +$25.6K ﹤0.01% 1215
2021
Q2 		$138K Sell
4,083
-13
-0.3% -$440 ﹤0.01% 1194
2021
Q1 		$170K Sell
4,096
-44
-1% -$1.91K ﹤0.01% 990
2020
Q4 		$127K Buy
4,140
+4,138
+206,900% +$62.6K ﹤0.01% 995
2020
Q3 		$0 Hold
2
– – ﹤0.01% 1945
2020
Q2 		$0 Buy
+2
New +$12 ﹤0.01% 1822
2020
Q1 		– Sell
-2
Closed – – 1599
2019
Q4 		$0 Buy
+2
New +$16 ﹤0.01% 1870

Other funds holding MGNI

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Nuveen
Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

O'Shaughnessy Asset Management's MGNI Position: Q4 2025 in Review

O'Shaughnessy Asset Management sold out of Magnite (MGNI) in Q4 2025, closing a stake of 10,677 shares — an estimated $233K sold.

O'Shaughnessy Asset Management first reported a position in MGNI in Q4 2019 and held it in 12 quarters. The position peaked at $233K in Q3 2025. 304 funds tracked by Wall St. Rank hold MGNI as of Q4 2025.

  • O'Shaughnessy Asset Management reported no remaining Magnite position as of Q4 2025 after selling out during the quarter.
  • O'Shaughnessy Asset Management sold 10,677 Magnite shares in Q4 2025, an estimated $233K.
  • O'Shaughnessy Asset Management first reported a position in Magnite in Q4 2019 and held it in 12 quarters.
  • O'Shaughnessy Asset Management's Magnite position peaked at $233K in Q3 2025.
  • 304 funds tracked by Wall St. Rank held Magnite as of Q4 2025.

Based on O'Shaughnessy Asset Management's 13F filing for Q4 2025, filed 11 Feb 2026.