Group One Trading’s Amtech Systems ASYS Stock Holding History

Group One Trading’s Portfolio ASYS Stock Details ASYS Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$10.5K	Buy	+900	New	+$12.1K	﹤0.01%	6350
2025 Q3	–	Sell	-2,500	Closed	-$11.1K	–	8375
2025 Q2	$11.1K	Buy	+2,500	New	+$9.77K	﹤0.01%	6652
2023 Q4	–	Sell	-500	Closed	-$3.81K	–	7352
2023 Q3	$3.81K	Sell	500 -8,000	-94%	-$72.7K	﹤0.01%	6825
2023 Q2	$81.3K	Buy	+8,500	New	+$77.2K	﹤0.01%	4824
2021 Q4	–	Sell	-4,200	Closed	-$48K	–	8167
2021 Q3	$48K	Hold	4,200	–	–	﹤0.01%	6569
2021 Q2	$40K	Buy	4,200 +1,300	+45%	+$13.3K	﹤0.01%	6751
2021 Q1	$34K	Buy	+2,900	New	+$26.8K	﹤0.01%	6460
2019 Q1	–	Sell	-4,000	Closed	-$18K	–	4771
2018 Q4	$18K	Buy	4,000 +1,100	+38%	+$5.37K	﹤0.01%	4055
2018 Q3	$15K	Buy	2,900 +900	+45%	+$4.94K	﹤0.01%	4489
2018 Q2	$12K	Hold	2,000	–	–	﹤0.01%	4548
2018 Q1	$15K	Buy	2,000 +1,900	+1,900%	+$17.1K	﹤0.01%	4174
2017 Q4	$1K	Buy	+100	New	+$1.22K	﹤0.01%	4740
2013 Q3	–	Sell	-6,200	Closed	-$39K	–	5186
2013 Q2	$39K	Buy	+6,200	New	+$27.8K	﹤0.01%	3638

Other funds holding ASYS

First Eagle Investment Management New York $59B AUM 32.99% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

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

Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return

Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return

PRCP

Pacific Ridge Capital Partners Lake Oswego, Oregon $462M AUM 40.76% 1-Year Est. Return

Arrowstreet Capital Boston, Massachusetts $185B AUM 39.58% 1-Year Est. Return

Jane Street New York $777B AUM 61.18% 1-Year Est. Return

Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return

Group One Trading's ASYS Position: Q1 2026 in Review

Group One Trading reduced its Amtech Systems (ASYS) stake by 56% in Q1 2026, selling an estimated $57.1K and leaving 3,311 shares worth $38.7K. The position accounts for ﹤0.01% of the portfolio, ranked #5459.

Group One Trading first reported a position in ASYS in Q2 2013 and has held it in 16 quarters since. The position peaked at $94.7K in Q4 2025. 79 funds tracked by Wall St. Rank hold ASYS as of Q1 2026.

Group One Trading held 3,311 shares of Amtech Systems worth $38.7K as of Q1 2026.
Group One Trading sold 4,238 Amtech Systems shares in Q1 2026, an estimated $57.1K.
Amtech Systems made up ﹤0.01% of Group One Trading's portfolio in Q1 2026, its #5459 holding.
Group One Trading first reported a position in Amtech Systems in Q2 2013 and has held it in 16 quarters since.
Group One Trading's Amtech Systems position peaked at $94.7K in Q4 2025.
79 funds tracked by Wall St. Rank held Amtech Systems as of Q1 2026.

Based on Group One Trading's 13F filing for Q1 2026, filed 13 May 2026.