MML Investors Services
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MML Investors Services’s Magnite MGNI Stock Holding History

MML Investors Services’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
Q3 		– Sell
-12,124
Closed -$292K – 2950
2025
Q2 		$292K Sell
12,124
-9,378
-44% -$138K ﹤0.01% 2453
2025
Q1 		$245K Buy
+21,502
New +$343K ﹤0.01% 2418

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
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $95.5B AUM 28.4% 1-Year Est. Return
GIM
Granahan Investment Management Waltham, Massachusetts $2.07B AUM 56.45% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

MML Investors Services's MGNI Position: Q3 2025 in Review

MML Investors Services sold out of Magnite (MGNI) in Q3 2025, closing a stake of 12,124 shares — an estimated $292K sold.

MML Investors Services first reported a position in MGNI in Q1 2025 and held it in 2 quarters. The position peaked at $292K in Q2 2025. 316 funds tracked by Wall St. Rank hold MGNI as of Q3 2025.

  • MML Investors Services reported no remaining Magnite position as of Q3 2025 after selling out during the quarter.
  • MML Investors Services sold 12,124 Magnite shares in Q3 2025, an estimated $292K.
  • MML Investors Services first reported a position in Magnite in Q1 2025 and held it in 2 quarters.
  • MML Investors Services's Magnite position peaked at $292K in Q2 2025.
  • 316 funds tracked by Wall St. Rank held Magnite as of Q3 2025.

Based on MML Investors Services's 13F filing for Q3 2025, filed 14 Nov 2025.