Mairs & Power Inc’s Magnite MGNI Stock Holding History

Mairs & Power Inc’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	-10,000	Closed	-$241K	–	254
2025 Q2	$241K	Buy	+10,000	New	+$147K	﹤0.01%	215

Other funds holding MGNI

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return

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 Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Mairs & Power Inc's MGNI Position: Q3 2025 in Review

Mairs & Power Inc sold out of Magnite (MGNI) in Q3 2025, closing a stake of 10,000 shares — an estimated $241K sold.

Mairs & Power Inc first reported a position in MGNI in Q2 2025 and held it in 1 quarter. The position peaked at $241K in Q2 2025. 316 funds tracked by Wall St. Rank hold MGNI as of Q3 2025.

Mairs & Power Inc reported no remaining Magnite position as of Q3 2025 after selling out during the quarter.
Mairs & Power Inc sold 10,000 Magnite shares in Q3 2025, an estimated $241K.
Mairs & Power Inc first reported a position in Magnite in Q2 2025 and held it in 1 quarter.
Mairs & Power Inc's Magnite position peaked at $241K in Q2 2025.
316 funds tracked by Wall St. Rank held Magnite as of Q3 2025.

Based on Mairs & Power Inc's 13F filing for Q3 2025, filed 14 Nov 2025.