Ardsley Advisory Partners’s Plug Power PLUG Stock Holding History

Ardsley Advisory Partners’s Portfolio PLUG Stock Details PLUG Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q3	–	Sell	-250,000	Closed	-$373K	–	186
2025 Q2	$373K	Buy	+250,000	New	+$249K	0.05%	135
2022 Q3	–	Sell	-77,500	Closed	-$1.28M	–	142
2022 Q2	$1.28M	Buy	+77,500	New	+$1.54M	0.21%	73
2021 Q4	–	Sell	-25,000	Closed	-$640K	–	149
2021 Q3	$640K	Sell	25,000 -100,000	-80%	-$2.68M	0.1%	94
2021 Q2	$4.27M	Buy	+125,000	New	+$3.63M	0.5%	46
2020 Q4	–	Sell	-48,000	Closed	-$644K	–	180
2020 Q3	$644K	Sell	48,000 -143,000	-75%	-$1.58M	0.12%	87
2020 Q2	$1.57M	Buy	+191,000	New	+$894K	0.33%	43
2020 Q1	–	Sell	-150,000	Closed	-$468K	–	146
2019 Q4	$468K	Buy	+150,000	New	+$456K	0.07%	104
2016 Q2	–	Sell	-150,000	Closed	-$308K	–	187
2016 Q1	$308K	Buy	+150,000	New	+$282K	0.05%	95
2014 Q2	–	Sell	-101,600	Closed	-$721K	–	278
2014 Q1	$721K	Buy	+101,600	New	+$470K	0.11%	104

Other funds holding PLUG

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

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

Legal & General Group London, United Kingdom $480B AUM 42.84% 1-Year Est. Return

D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return

Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return

Northern Trust Chicago, Illinois $860B AUM 41.15% 1-Year Est. Return

Ardsley Advisory Partners's PLUG Position: Q3 2025 in Review

Ardsley Advisory Partners sold out of Plug Power (PLUG) in Q3 2025, closing a stake of 250,000 shares — an estimated $373K sold.

Ardsley Advisory Partners first reported a position in PLUG in Q1 2014 and held it in 9 quarters. The position peaked at $4.27M in Q2 2021. 455 funds tracked by Wall St. Rank hold PLUG as of Q3 2025.

Ardsley Advisory Partners reported no remaining Plug Power position as of Q3 2025 after selling out during the quarter.
Ardsley Advisory Partners sold 250,000 Plug Power shares in Q3 2025, an estimated $373K.
Ardsley Advisory Partners first reported a position in Plug Power in Q1 2014 and held it in 9 quarters.
Ardsley Advisory Partners's Plug Power position peaked at $4.27M in Q2 2021.
455 funds tracked by Wall St. Rank held Plug Power as of Q3 2025.

Based on Ardsley Advisory Partners's 13F filing for Q3 2025, filed 14 Nov 2025.