Citadel Advisors
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Citadel Advisors’s Amtech Systems ASYS Stock Holding History

Citadel Advisors’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
2025
Q2 		– Sell
-18,800
Closed -$90.8K – 12461
2025
Q1 		$90.8K Buy
18,800
+14,700
+359% +$75.9K ﹤0.01% 11608
2024
Q4 		$22.3K Hold
4,100
– – ﹤0.01% 13109
2024
Q3 		$23.8K Buy
4,100
+3,800
+1,267% +$23.1K ﹤0.01% 12644
2024
Q2 		$1.76K Sell
300
-14,500
-98% -$78.3K ﹤0.01% 13783
2024
Q1 		$80.1K Buy
14,800
+7,300
+97% +$32.9K ﹤0.01% 11656
2023
Q4 		$31.5K Buy
7,500
+4,700
+168% +$31.9K ﹤0.01% 12227
2023
Q3 		$21.3K Buy
2,800
+1,700
+155% +$15.5K ﹤0.01% 12578
2023
Q2 		$10.5K Sell
1,100
-3,500
-76% -$31.8K ﹤0.01% 13200
2023
Q1 		$43.9K Sell
4,600
-1,000
-18% -$9.39K ﹤0.01% 12330
2022
Q4 		$42.6K Buy
+5,600
New +$50.7K ﹤0.01% 12328
2021
Q3 		– Sell
-10,800
Closed -$104K – 13768
2021
Q2 		$104K Sell
10,800
-7,800
-42% -$80K ﹤0.01% 12882
2021
Q1 		$220K Buy
+18,600
New +$172K ﹤0.01% 11509
2019
Q2 		– Sell
-10,700
Closed -$57K – 9142
2019
Q1 		$57K Buy
+10,700
New +$52.8K ﹤0.01% 8769
2018
Q4 		– Sell
-19,600
Closed -$105K – 9071
2018
Q3 		$105K Sell
19,600
-1,400
-7% -$7.68K ﹤0.01% 8554
2018
Q2 		$127K Buy
21,000
+2,700
+15% +$21.1K ﹤0.01% 8133
2018
Q1 		$134K Buy
+18,300
New +$165K ﹤0.01% 7598

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
Jane Street
Jane Street New York $777B AUM 61.18% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return

Citadel Advisors's ASYS Position: Q1 2026 in Review

Citadel Advisors reduced its Amtech Systems (ASYS) stake by 14% in Q1 2026, selling an estimated $242K and leaving 106,914 shares worth $1.25M. The position accounts for ﹤0.01% of the portfolio, ranked #7170.

Citadel Advisors first reported a position in ASYS in Q3 2017 and has held it in 25 quarters since. The position peaked at $1.57M in Q4 2025. 79 funds tracked by Wall St. Rank hold ASYS as of Q1 2026.

  • Citadel Advisors held 106,914 shares of Amtech Systems worth $1.25M as of Q1 2026.
  • Citadel Advisors sold 17,929 Amtech Systems shares in Q1 2026, an estimated $242K.
  • Amtech Systems made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #7170 holding.
  • Citadel Advisors first reported a position in Amtech Systems in Q3 2017 and has held it in 25 quarters since.
  • Citadel Advisors's Amtech Systems position peaked at $1.57M in Q4 2025.
  • 79 funds tracked by Wall St. Rank held Amtech Systems as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.