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Oppenheimer & Co’s Magnite MGNI Stock Holding History

Oppenheimer & Co’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
Q2 		– Sell
-27,925
Closed -$319K – 1666
2025
Q1 		$319K Buy
+27,925
New +$445K ﹤0.01% 1246
2021
Q4 		– Sell
-32,200
Closed -$902K – 1534
2021
Q3 		$902K Buy
+32,200
New +$969K 0.02% 780
2021
Q2 		– Sell
-5,250
Closed -$219K – 1545
2021
Q1 		$219K Buy
+5,250
New +$227K ﹤0.01% 1316
2016
Q4 		– Sell
-17,097
Closed -$142K – 1316
2016
Q3 		$142K Hold
17,097
– – ﹤0.01% 1190
2016
Q2 		$233K Sell
17,097
-5,741
-25% -$92.4K 0.01% 1043
2016
Q1 		$417K Sell
22,838
-1,491
-6% -$22.8K 0.01% 817
2015
Q4 		$400K Buy
+24,329
New +$376K 0.01% 848

Other funds holding MGNI

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
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 $645B AUM 30.41% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $95.5B AUM 28.4% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
GIM
Granahan Investment Management Waltham, Massachusetts $2.07B AUM 56.45% 1-Year Est. Return
EC
Edenbrook Capital Mt. Kisco, New York $321M AUM 79.21% 1-Year Est. Return

Oppenheimer & Co's MGNI Position: Q2 2025 in Review

Oppenheimer & Co sold out of Magnite (MGNI) in Q2 2025, closing a stake of 27,925 shares — an estimated $319K sold.

Oppenheimer & Co first reported a position in MGNI in Q4 2015 and held it in 7 quarters. The position peaked at $902K in Q3 2021. 286 funds tracked by Wall St. Rank hold MGNI as of Q2 2025.

  • Oppenheimer & Co reported no remaining Magnite position as of Q2 2025 after selling out during the quarter.
  • Oppenheimer & Co sold 27,925 Magnite shares in Q2 2025, an estimated $319K.
  • Oppenheimer & Co first reported a position in Magnite in Q4 2015 and held it in 7 quarters.
  • Oppenheimer & Co's Magnite position peaked at $902K in Q3 2021.
  • 286 funds tracked by Wall St. Rank held Magnite as of Q2 2025.

Based on Oppenheimer & Co's 13F filing for Q2 2025, filed 31 Jul 2025.