Ardsley Advisory Partners’s Magnite MGNI Stock Holding History

Ardsley Advisory Partners’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	–	Sell	-65,000	Closed	-$772K	–	186
2026 Q1	$772K	Buy	+65,000	New	+$871K	0.1%	129
2025 Q4	–	Sell	-195,000	Closed	-$4.25M	–	167
2025 Q3	$4.25M	Buy	+195,000	New	+$4.6M	0.53%	64
2025 Q2	–	Sell	-250,000	Closed	-$2.85M	–	185
2025 Q1	$2.85M	Buy	+250,000	New	+$3.99M	0.55%	66
2022 Q3	–	Sell	-10,000	Closed	-$89K	–	130
2022 Q2	$89K	Buy	+10,000	New	+$107K	0.01%	121

Other funds holding MGNI

KAM

Kopion Asset Management Mckinney, Texas $158M AUM 11.93% 1-Year Est. Return

Penbrook Management New York $157M AUM 46.57% 1-Year Est. Return

MNBTD

Moody National Bank Trust Division Galveston, Texas $1.21B AUM 38.93% 1-Year Est. Return

DBA Trading Fort Lauderdale, Florida $199M AUM

CPCM

Cardinal Point Capital Management Toronto, Ontario, Canada $1.77B AUM 26.72% 1-Year Est. Return

Handelsbanken Fonder Stockholm, Sweden $35.1B AUM 47.76% 1-Year Est. Return

PFSRSONJ

Police & Firemen's Retirement System of New Jersey Trenton, New Jersey $13.3B AUM 45.46% 1-Year Est. Return

Fulton Bank Lancaster, Pennsylvania $3.27B AUM 17.38% 1-Year Est. Return

SOADOR

State of Alaska Department of Revenue Juneau, Alaska $10.1B AUM 42.83% 1-Year Est. Return

BTI

Blue Trust Inc Alpharetta, Georgia $9.54B AUM 19.86% 1-Year Est. Return

Ardsley Advisory Partners's MGNI Position: Q2 2026 in Review

Ardsley Advisory Partners reduced its Magnite (MGNI) stake by 26% in Q2 2026, selling an estimated $294K and leaving 57,500 shares worth $1.09M. The position accounts for 0.11% of the portfolio, ranked #125.

Ardsley Advisory Partners first reported a position in MGNI in Q4 2014 and has held it in 15 quarters since. The position peaked at $8.92M in Q2 2025. 42 funds tracked by Wall St. Rank hold MGNI as of Q2 2026.

Ardsley Advisory Partners held 57,500 shares of Magnite worth $1.09M as of Q2 2026.
Ardsley Advisory Partners sold 20,500 Magnite shares in Q2 2026, an estimated $294K.
Magnite made up 0.11% of Ardsley Advisory Partners's portfolio in Q2 2026, its #125 holding.
Ardsley Advisory Partners first reported a position in Magnite in Q4 2014 and has held it in 15 quarters since.
Ardsley Advisory Partners's Magnite position peaked at $8.92M in Q2 2025.
42 funds tracked by Wall St. Rank held Magnite as of Q2 2026.

Based on Ardsley Advisory Partners's 13F filing for Q2 2026, filed 13 Jul 2026.