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Penbrook Management’s Magnite MGNI Stock Holding History

Penbrook 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
2026
Q2 		$2.13M Sell
112,040
-150
-0.1% -$2.15K 1.36% 20
2026
Q1 		$1.33M Buy
112,190
+81,075
+261% +$1.09M 1.01% 29
2025
Q4 		$505K Buy
31,115
+2,695
+9% +$44.7K 0.35% 58
2025
Q3 		$619K Hold
28,420
– – 0.43% 51
2025
Q2 		$685K Sell
28,420
-9,750
-26% -$144K 0.52% 48
2025
Q1 		$436K Sell
38,170
-310
-0.8% -$4.94K 0.33% 66
2024
Q4 		$613K Buy
38,480
+15,050
+64% +$221K 0.42% 52
2024
Q3 		$325K Buy
+23,430
New +$319K 0.21% 80

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

Penbrook Management's MGNI Position: Q2 2026 in Review

Penbrook Management reduced its Magnite (MGNI) stake by 0.13% in Q2 2026, selling an estimated $2.15K and leaving 112,040 shares worth $2.13M. The position accounts for 1.36% of the portfolio, ranked #20.

Penbrook Management first reported a position in MGNI in Q3 2024 and has held it in 8 quarters since. 310 funds tracked by Wall St. Rank hold MGNI as of Q2 2026.

  • Penbrook Management held 112,040 shares of Magnite worth $2.13M as of Q2 2026.
  • Penbrook Management sold 150 Magnite shares in Q2 2026, an estimated $2.15K.
  • Magnite made up 1.36% of Penbrook Management's portfolio in Q2 2026, its #20 holding.
  • Penbrook Management first reported a position in Magnite in Q3 2024 and has held it in 8 quarters since.
  • 310 funds tracked by Wall St. Rank held Magnite as of Q2 2026.

Based on Penbrook Management's 13F filing for Q2 2026, filed 23 Jul 2026.