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Grizzlyrock Capital’s Magnite MGNI Stock Holding History

Grizzlyrock Capital’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
Q2 		$22.1M Sell
1,164,628
-74,052
-6% -$1.06M 15.46% 1
2026
Q1 		$14.7M Buy
1,238,680
+666,774
+117% +$8.94M 11.65% 3
2025
Q4 		$9.28M Buy
571,906
+181,000
+46% +$3M 6.95% 4
2025
Q3 		$8.51M Sell
390,906
-583,417
-60% -$13.8M 6.61% 5
2025
Q2 		$23.5M Buy
974,323
+75,782
+8% +$1.12M 16.01% 1
2025
Q1 		$10.3M Buy
898,541
+35,000
+4% +$558K 9.3% 3
2024
Q4 		$13.7M Sell
863,541
-4,630
-0.5% -$67.9K 14.36% 3
2024
Q3 		$12M Buy
868,171
+65,004
+8% +$886K 10.37% 3
2024
Q2 		$10.7M Buy
803,167
+117,810
+17% +$1.29M 8.86% 3
2024
Q1 		$7.37M Sell
685,357
-27,273
-4% -$273K 6.03% 8
2023
Q4 		$6.66M Buy
+712,630
New +$5.63M 5% 8

Other funds holding MGNI

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 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 $226B AUM 44.75% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return
Nuveen
Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return

Grizzlyrock Capital's MGNI Position: Q2 2026 in Review

Grizzlyrock Capital reduced its Magnite (MGNI) stake by 6% in Q2 2026, selling an estimated $1.06M and leaving 1,164,628 shares worth $22.1M. The position accounts for 15.46% of the portfolio, ranked #1.

Grizzlyrock Capital first reported a position in MGNI in Q4 2023 and has held it in 11 quarters since. The position peaked at $23.5M in Q2 2025. 310 funds tracked by Wall St. Rank hold MGNI as of Q2 2026.

  • Grizzlyrock Capital held 1,164,628 shares of Magnite worth $22.1M as of Q2 2026.
  • Grizzlyrock Capital sold 74,052 Magnite shares in Q2 2026, an estimated $1.06M.
  • Magnite made up 15.46% of Grizzlyrock Capital's portfolio in Q2 2026, its #1 holding.
  • Grizzlyrock Capital first reported a position in Magnite in Q4 2023 and has held it in 11 quarters since.
  • Grizzlyrock Capital's Magnite position peaked at $23.5M in Q2 2025.
  • 310 funds tracked by Wall St. Rank held Magnite as of Q2 2026.

Based on Grizzlyrock Capital's 13F filing for Q2 2026, filed 14 Aug 2026.