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Stephens Investment Management Group’s Magnite MGNI Stock Holding History

Stephens Investment Management Group’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 		– Sell
-1,128,578
Closed -$18.3M – 179
2025
Q4 		$18.3M Buy
1,128,578
+164,035
+17% +$2.72M 0.24% 126
2025
Q3 		$21M Sell
964,543
-385,553
-29% -$9.1M 0.27% 120
2025
Q2 		$32.6M Buy
1,350,096
+399,440
+42% +$5.88M 0.43% 94
2025
Q1 		$10.8M Sell
950,656
-45,988
-5% -$733K 0.16% 143
2024
Q4 		$15.9M Buy
996,644
+592,853
+147% +$8.7M 0.21% 129
2024
Q3 		$5.59M Buy
+403,791
New +$5.5M 0.08% 150

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 $95.5B AUM 28.4% 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

Stephens Investment Management Group's MGNI Position: Q1 2026 in Review

Stephens Investment Management Group sold out of Magnite (MGNI) in Q1 2026, closing a stake of 1,128,578 shares — an estimated $18.3M sold.

Stephens Investment Management Group first reported a position in MGNI in Q3 2024 and held it in 6 quarters. The position peaked at $32.6M in Q2 2025. 297 funds tracked by Wall St. Rank hold MGNI as of Q1 2026.

  • Stephens Investment Management Group reported no remaining Magnite position as of Q1 2026 after selling out during the quarter.
  • Stephens Investment Management Group sold 1,128,578 Magnite shares in Q1 2026, an estimated $18.3M.
  • Stephens Investment Management Group first reported a position in Magnite in Q3 2024 and held it in 6 quarters.
  • Stephens Investment Management Group's Magnite position peaked at $32.6M in Q2 2025.
  • 297 funds tracked by Wall St. Rank held Magnite as of Q1 2026.

Based on Stephens Investment Management Group's 13F filing for Q1 2026, filed 28 Apr 2026.