Arrowstreet Capital’s Amtech Systems ASYS Stock Holding History

Arrowstreet Capital’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	$4.27M	Buy	365,387 +18,354	+5%	+$247K	﹤0.01%	1204
2025 Q4	$4.36M	Buy	347,033 +164,604	+90%	+$1.48M	﹤0.01%	1174
2025 Q3	$1.69M	Buy	+182,429	New	+$1.11M	﹤0.01%	1484
2022 Q1	–	Sell	-135,814	Closed	-$1.34M	–	1185
2021 Q4	$1.34M	Sell	135,814 -2,797	-2%	-$32.3K	﹤0.01%	1099
2021 Q3	$1.58M	Hold	138,611	–	–	﹤0.01%	1187
2021 Q2	$1.34M	Buy	138,611 +27,988	+25%	+$287K	﹤0.01%	1456
2021 Q1	$1.31M	Buy	110,623 +47,623	+76%	+$441K	﹤0.01%	1712
2020 Q4	$402K	Hold	63,000	–	–	﹤0.01%	2062
2020 Q3	$308K	Buy	63,000 +22,300	+55%	+$115K	﹤0.01%	2135
2020 Q2	$198K	Hold	40,700	–	–	﹤0.01%	2172
2020 Q1	$177K	Buy	40,700 +28,500	+234%	+$160K	﹤0.01%	1746
2019 Q4	$87K	Buy	+12,200	New	+$70.7K	﹤0.01%	1673
2018 Q2	–	Sell	-59,972	Closed	-$439K	–	1073
2018 Q1	$439K	Buy	59,972 +6,025	+11%	+$54.2K	﹤0.01%	970
2017 Q4	$543K	Buy	+53,947	New	+$659K	﹤0.01%	1060

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

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

Connor, Clark & Lunn Investment Management (CC&L) Vancouver, British Columbia, Canada $43.4B AUM 51.29% 1-Year Est. Return

Arrowstreet Capital's ASYS Position: Q1 2026 in Review

Arrowstreet Capital increased its Amtech Systems (ASYS) stake by 5.3% in Q1 2026, buying an estimated $247K and bringing the position to 365,387 shares worth $4.27M. The position accounts for ﹤0.01% of the portfolio, ranked #1204.

Arrowstreet Capital first reported a position in ASYS in Q4 2017 and has held it in 14 quarters since. The position peaked at $4.36M in Q4 2025. 79 funds tracked by Wall St. Rank hold ASYS as of Q1 2026.

Arrowstreet Capital held 365,387 shares of Amtech Systems worth $4.27M as of Q1 2026.
Arrowstreet Capital bought 18,354 Amtech Systems shares in Q1 2026, an estimated $247K.
Amtech Systems made up ﹤0.01% of Arrowstreet Capital's portfolio in Q1 2026, its #1204 holding.
Arrowstreet Capital first reported a position in Amtech Systems in Q4 2017 and has held it in 14 quarters since.
Arrowstreet Capital's Amtech Systems position peaked at $4.36M in Q4 2025.
79 funds tracked by Wall St. Rank held Amtech Systems as of Q1 2026.

Based on Arrowstreet Capital's 13F filing for Q1 2026, filed 14 May 2026.