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	$1.09M	Sell	57,500 -20,500	-26%	-$294K	0.11%	125
2026 Q1	$927K	Buy	+78,000	New	+$1.05M	0.12%	124
2025 Q4	–	Sell	-60,000	Closed	-$1.31M	–	168
2025 Q3	$1.31M	Sell	60,000 -310,000	-84%	-$7.32M	0.16%	103
2025 Q2	$8.92M	Buy	370,000 +214,000	+137%	+$3.15M	1.17%	25
2025 Q1	$1.78M	Buy	+156,000	New	+$2.49M	0.34%	85
2024 Q3	–	Sell	-132,950	Closed	-$1.77M	–	163
2024 Q2	$1.77M	Buy	132,950 +40,950	+45%	+$448K	0.26%	79
2024 Q1	$989K	Buy	+92,000	New	+$919K	0.14%	95
2023 Q1	–	Sell	-24,750	Closed	-$262K	–	129
2022 Q4	$262K	Buy	+24,750	New	+$226K	0.05%	109
2022 Q3	–	Sell	-94,250	Closed	-$837K	–	131
2022 Q2	$837K	Buy	94,250 +19,250	+26%	+$206K	0.14%	88
2022 Q1	$991K	Buy	+75,000	New	+$1.01M	0.17%	76
2020 Q4	–	Sell	-20,000	Closed	-$139K	–	174
2020 Q3	$139K	Buy	+20,000	New	+$134K	0.03%	134
2019 Q3	–	Sell	-35,000	Closed	-$222K	–	158
2019 Q2	$222K	Buy	+35,000	New	+$215K	0.04%	130
2019 Q1	–	Sell	-65,000	Closed	-$242K	–	142
2018 Q4	$242K	Buy	+65,000	New	+$248K	0.06%	89
2018 Q1	–	Sell	-70,000	Closed	-$131K	–	162
2017 Q4	$131K	Buy	+70,000	New	+$175K	0.02%	132
2015 Q1	–	Sell	-185,000	Closed	-$2.99M	–	223
2014 Q4	$2.99M	Buy	+185,000	New	+$2.39M	0.47%	45

Other funds holding MGNI

KAM

Kopion Asset Management Mckinney, Texas $158M AUM 11.93% 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

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

LTAS

Linden Thomas Advisory Services Charlotte, North Carolina $1.24B AUM 47.37% 1-Year Est. Return

Wealth Enhancement Advisory Services Plymouth, Minnesota $59.8B AUM 29.42% 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. 35 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.
35 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.