3C
MGNI icon

325 Capital’s Magnite MGNI Stock Holding History

325 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 		$64.8M Buy
3,412,694
+1,407,307
+70% +$20.2M 15.44% 2
2026
Q1 		$23.8M Hold
2,005,387
– – 8.68% 4
2025
Q4 		$32.5M Buy
2,005,387
+1,355,326
+208% +$22.5M 11.4% 3
2025
Q3 		$14.2M Buy
+650,061
New +$15.3M 4.3% 9

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

325 Capital's MGNI Position: Q2 2026 in Review

325 Capital increased its Magnite (MGNI) stake by 70% in Q2 2026, buying an estimated $20.2M and bringing the position to 3,412,694 shares worth $64.8M. The position accounts for 15.44% of the portfolio, ranked #2.

325 Capital first reported a position in MGNI in Q3 2025 and has held it in 4 quarters since. 310 funds tracked by Wall St. Rank hold MGNI as of Q2 2026.

  • 325 Capital held 3,412,694 shares of Magnite worth $64.8M as of Q2 2026.
  • 325 Capital bought 1,407,307 Magnite shares in Q2 2026, an estimated $20.2M.
  • Magnite made up 15.44% of 325 Capital's portfolio in Q2 2026, its #2 holding.
  • 325 Capital first reported a position in Magnite in Q3 2025 and has held it in 4 quarters since.
  • 310 funds tracked by Wall St. Rank held Magnite as of Q2 2026.

Based on 325 Capital's 13F filing for Q2 2026, filed 14 Aug 2026.