Amtech SystemsASYS
13F holders, Q3 2025 (September 30)At the end of Q3 2025, 54 institutions reported holding Amtech Systems Inc. (ASYS) in their 13F filings, up 18 from Q2 2025. 24 opened new positions and 6 sold out. The largest holders were Dimensional Fund Advisors LP ($7.9M), First Eagle Investment Management, LLC ($7.0M) and Vanguard Group Inc. ($6.3M). 3 famous investors held it, including Ken Griffin (0.0% of Citadel Advisors's portfolio), Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Amtech Systems Inc.
- CUSIP
- 032332504
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 24 | $6.9M |
| Exits | 6 | $339K |
All 13F filers, Q2 2025 → Q3 2025: 871,649 shares bought and 421,862 shares sold, net +449,787 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 54 holders
| Dimensional Fund Advisors LP | 0.00% | Reduce -6.6% | 849,815 | $7.9M |
| First Eagle Investment Management, LLC | 0.01% | Reduce -6.0% | 752,346 | $7.0M |
| Vanguard Group Inc. | 0.00% | Add +2.6% | 676,006 | $6.3M |
| Pacific Ridge Capital Partners, LLC | 1.32% | Reduce -2.3% | 646,489 | $6.0M |
| Arrowstreet Capital, Limited Partnership | 0.00% | New | 182,429 | $1.7M |
| Jane Street Group, LLC | 0.00% | New | 175,422 | $1.6M |
| BlackRock, Inc. | 0.00% | Add +6.6% | 132,873 | $1.2M |
| Geode Capital Management, LLC | 0.00% | Reduce -3.7% | 131,281 | $1.2M |
| Marshall Wace, LLP | 0.00% | New | 105,272 | $975K |
| Acadian Asset Management LLC | 0.00% | Add +94.4% | 83,532 | $771K |
| Citadel Advisors | 0.00% | Add +107.0% | 78,454 | $726K |
| Bridgeway Capital Management, LLC | 0.01% | No change | 64,800 | $600K |
| State Street Corp. | 0.00% | No change | 54,790 | $507K |
| Essex Investment Management Co. LLC | 0.05% | New | 37,816 | $350K |
| Northern Trust Corp. | 0.00% | Reduce -21.5% | 36,703 | $340K |
| WealthTrust Axiom LLC | 0.09% | Reduce -15.0% | 35,800 | $332K |
| Ancora Advisors LLC | 0.01% | Reduce -68.3% | 35,247 | $326K |
| Gsa Capital Partners LLP | 0.03% | Reduce -23.9% | 33,817 | $313K |
| Kovack Advisors, Inc. | 0.03% | Reduce -56.0% | 32,150 | $298K |
| Goldman Sachs Group Inc. | 0.00% | Add +56.6% | 31,251 | $289K |
| Ironwood Investment Management LLC | 0.11% | Reduce -0.7% | 27,591 | $255K |
| Janney Montgomery Scott LLC | 0.00% | No change | 26,700 | $247K |
| EHP Funds Inc. | 0.31% | New | 25,242 | $234K |
| Cubist Systematic Strategies, LLC | 0.00% | New | 24,844 | $230K |
| GWN Securities Inc. | 0.04% | New | 20,423 | $189K |
| Renaissance Technologies | 0.00% | Add +40.0% | 20,300 | $188K |
| Villere St Denis J & Co. LLC | 0.02% | No change | 20,000 | $185K |
| Susquehanna International Group, LLP | 0.00% | New | 19,937 | $185K |
| Wexford Capital LP | 0.05% | New | 18,808 | $174K |
| Brevan Howard Capital Management LP | 0.00% | New | 18,000 | $167K |
| HRT Financial LP | 0.00% | New | 16,463 | $152K |
| James Investment Research, Inc. | 0.01% | New | 14,600 | $135K |
| NewEdge Advisors, LLC | 0.00% | New | 14,600 | $135K |
| Engineers Gate Manager LP | 0.00% | New | 13,442 | $124K |
| Thompson Davis & Co., Inc. | 0.08% | New | 13,250 | $123K |
| LPL Financial LLC | 0.00% | New | 12,815 | $119K |
| Millennium Management | 0.00% | New | 11,946 | $111K |
| American Century Companies Inc. | 0.00% | New | 10,623 | $98K |
| XTX Topco Ltd | 0.01% | Reduce -56.0% | 10,385 | $96K |
| Williams & Novak, LLC | 0.07% | Reduce -44.3% | 10,250 | $95K |
| Morgan Stanley | 0.00% | Add +196.4% | 7,738 | $72K |
| Wells Fargo & Company | 0.00% | New | 2,563 | $24K |
| UBS Group AG | 0.00% | Reduce -84.2% | 2,030 | $19K |
| Group One Trading LLC | 0.00% | New | 2,024 | $19K |
| Bank of America Corp. | 0.00% | Add +747.2% | 1,686 | $16K |
| Osaic Holdings, Inc. | 0.00% | Reduce -52.6% | 780 | $7K |
| FMR LLC | 0.00% | Reduce -88.7% | 665 | $6K |
| Strengthening Families & Communities, LLC | 0.00% | New | 490 | $5K |
| Signaturefd, LLC | 0.00% | New | 400 | $4K |
| Principal Securities, Inc. | 0.00% | No change | 200 | $2K |
| SBI Securities Co., Ltd. | 0.00% | Reduce -37.3% | 151 | $1K |
| Barclays PLC | 0.00% | New | 30 | $278 |
| Citigroup Inc. | 0.00% | New | 1 | $9 |
| Royal Bank of Canada | 0.00% | Reduce -99.9% | 36 | $0 |
"% of holder's portfolio" is ASYS's weight in each manager's 13F, not the share of Amtech Systems Inc. the manager owns.