State of Wisconsin Investment Board
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State of Wisconsin Investment Board’s Magnite MGNI Stock Holding History

State of Wisconsin Investment Board’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
2026
Q1 		$2.2M Sell
185,470
-34,089
-16% -$457K 0.01% 1372
2025
Q4 		$3.56M Buy
219,559
+12,654
+6% +$210K 0.01% 1140
2025
Q3 		$4.51M Buy
206,905
+20,911
+11% +$494K 0.01% 1007
2025
Q2 		$4.49M Sell
185,994
-47,687
-20% -$703K 0.01% 977
2025
Q1 		$2.67M Buy
233,681
+161,823
+225% +$2.58M 0.01% 1139
2024
Q4 		$1.14M Buy
71,858
+41,257
+135% +$605K ﹤0.01% 1470
2024
Q3 		$424K Buy
30,601
+20,266
+196% +$276K ﹤0.01% 1942
2024
Q2 		$137K Buy
10,335
+184
+2% +$2.01K ﹤0.01% 2198
2024
Q1 		$109K Sell
10,151
-889
-8% -$8.88K ﹤0.01% 2124
2023
Q4 		$103K Sell
11,040
-119,749
-92% -$946K ﹤0.01% 2268
2023
Q3 		$986K Sell
130,789
-2,210
-2% -$23.8K ﹤0.01% 1398
2023
Q2 		$1.82M Buy
132,999
+26,154
+24% +$291K 0.01% 1321
2023
Q1 		$989K Sell
106,845
-11,971
-10% -$128K ﹤0.01% 1485
2022
Q4 		$1.26M Sell
118,816
-100,730
-46% -$920K ﹤0.01% 1428
2022
Q3 		$1.44M Buy
219,546
+9,535
+5% +$76.7K ﹤0.01% 1428
2022
Q2 		$1.86M Buy
210,011
+59,311
+39% +$636K ﹤0.01% 1385
2022
Q1 		$1.99M Buy
150,700
+40,700
+37% +$549K ﹤0.01% 1498
2021
Q4 		$1.93M Sell
110,000
-11,000
-9% -$248K ﹤0.01% 1289
2021
Q3 		$3.39M Buy
121,000
+11,000
+10% +$331K 0.01% 1157
2021
Q2 		$3.72M Buy
+110,000
New +$3.73M 0.01% 1136

Other funds holding MGNI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
N
Nuveen Charlotte, North Carolina $369B AUM 31.66% 1-Year Est. Return

State of Wisconsin Investment Board's MGNI Position: Q1 2026 in Review

State of Wisconsin Investment Board reduced its Magnite (MGNI) stake by 16% in Q1 2026, selling an estimated $457K and leaving 185,470 shares worth $2.2M. The position accounts for 0.01% of the portfolio, ranked #1372.

State of Wisconsin Investment Board first reported a position in MGNI in Q2 2021 and has held it in 20 quarters since. The position peaked at $4.51M in Q3 2025. 296 funds tracked by Wall St. Rank hold MGNI as of Q1 2026.

  • State of Wisconsin Investment Board held 185,470 shares of Magnite worth $2.2M as of Q1 2026.
  • State of Wisconsin Investment Board sold 34,089 Magnite shares in Q1 2026, an estimated $457K.
  • Magnite made up 0.01% of State of Wisconsin Investment Board's portfolio in Q1 2026, its #1372 holding.
  • State of Wisconsin Investment Board first reported a position in Magnite in Q2 2021 and has held it in 20 quarters since.
  • State of Wisconsin Investment Board's Magnite position peaked at $4.51M in Q3 2025.
  • 296 funds tracked by Wall St. Rank held Magnite as of Q1 2026.

Based on State of Wisconsin Investment Board's 13F filing for Q1 2026, filed 15 May 2026.