Ardsley Advisory Partners’s Arm ARM Stock Holding History

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

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	–	Sell	-85,000	Closed	-$9.29M	–	159
2025 Q4	$9.29M	Buy	85,000 +65,000	+325%	+$9.45M	1.02%	33
2025 Q3	$2.83M	Sell	20,000 -5,000	-20%	-$728K	0.35%	81
2025 Q2	$4.04M	Hold	25,000	–	–	0.53%	54
2025 Q1	$2.67M	Buy	+25,000	New	+$3.49M	0.51%	71

Other funds holding ARM

HAM

Hyperion Asset Management Brisbane, Australia $3.77B AUM 16.13% 1-Year Est. Return

CAM

Congress Asset Management Boston, Massachusetts $16.3B AUM 42.69% 1-Year Est. Return

Swedbank Stockholm, Sweden $116B AUM 46.87% 1-Year Est. Return

TCM

Tran Capital Management San Rafael, California $869M AUM 52.91% 1-Year Est. Return

TEC

Tensor Edge Capital Weston, Massachusetts $1.51B AUM

Robeco Institutional Asset Management Rotterdam, Netherlands $81.4B AUM 40.71% 1-Year Est. Return

PFS

Prospera Financial Services Dallas, Texas $6.89B AUM 37.41% 1-Year Est. Return

UNICOM Systems Las Vegas, Nevada $1.53B AUM 148.94% 1-Year Est. Return

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

AAM

AMI Asset Management Los Angeles, California $1.74B AUM 26.89% 1-Year Est. Return

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

Ardsley Advisory Partners increased its Arm (ARM) stake by 161% in Q2 2026, buying an estimated $7.71M and bringing the position to 47,000 shares worth $16.6M. The position accounts for 1.73% of the portfolio, ranked #10.

Ardsley Advisory Partners first reported a position in ARM in Q1 2024 and has held it in 7 quarters since. The position peaked at $17.4M in Q2 2025. 159 funds tracked by Wall St. Rank hold ARM as of Q2 2026.

Ardsley Advisory Partners held 47,000 shares of Arm worth $16.6M as of Q2 2026.
Ardsley Advisory Partners bought 29,000 Arm shares in Q2 2026, an estimated $7.71M.
Arm made up 1.73% of Ardsley Advisory Partners's portfolio in Q2 2026, its #10 holding.
Ardsley Advisory Partners first reported a position in Arm in Q1 2024 and has held it in 7 quarters since.
Ardsley Advisory Partners's Arm position peaked at $17.4M in Q2 2025.
159 funds tracked by Wall St. Rank held Arm as of Q2 2026.

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