Jane Street
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Jane Street’s Amtech Systems ASYS Stock Holding History

Jane Street’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 		$3.98M Buy
340,879
+15,125
+5% +$204K ﹤0.01% 3863
2025
Q4 		$4.09M Buy
325,754
+150,332
+86% +$1.35M ﹤0.01% 3548
2025
Q3 		$1.62M Buy
+175,422
New +$1.07M ﹤0.01% 5325

Other funds holding ASYS

First Eagle Investment Management
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
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Marshall Wace
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
Arrowstreet Capital Boston, Massachusetts $185B AUM 39.58% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return
Connor, Clark & Lunn Investment Management (CC&L)
Connor, Clark & Lunn Investment Management (CC&L) Vancouver, British Columbia, Canada $43.4B AUM 51.29% 1-Year Est. Return

Jane Street's ASYS Position: Q1 2026 in Review

Jane Street increased its Amtech Systems (ASYS) stake by 4.6% in Q1 2026, buying an estimated $204K and bringing the position to 340,879 shares worth $3.98M. The position accounts for ﹤0.01% of the portfolio, ranked #3863.

Jane Street first reported a position in ASYS in Q3 2025 and has held it in 3 quarters since. The position peaked at $4.09M in Q4 2025. 79 funds tracked by Wall St. Rank hold ASYS as of Q1 2026.

  • Jane Street held 340,879 shares of Amtech Systems worth $3.98M as of Q1 2026.
  • Jane Street bought 15,125 Amtech Systems shares in Q1 2026, an estimated $204K.
  • Amtech Systems made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #3863 holding.
  • Jane Street first reported a position in Amtech Systems in Q3 2025 and has held it in 3 quarters since.
  • Jane Street's Amtech Systems position peaked at $4.09M in Q4 2025.
  • 79 funds tracked by Wall St. Rank held Amtech Systems as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.