Who owns Amtech Systems, Inc.?
Institutional ownership of ASYS from SEC Form 13F filings across 77 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
77
13F holders
$136.5M
value, 2026 filers
37.4%
of shares outstanding (6.5M sh)
33
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of ASYS's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | First Eagle Investment Management, LLC | 848,426 | $19.6M | 0.0% | 4.9% | -49.0% |
| 2 | BlackRock, Inc. | 763,487 | $17.6M | 0.0% | 4.4% | +424.9% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 580,502 | $13.4M | 0.0% | 3.3% | -48.6% |
| 4 | ACADIAN ASSET MANAGEMENT LLC | 580,278 | $13,388 | 0.0% | 3.3% | +24.3% |
| 5 | MARSHALL WACE, LLP | 398,564 | $9.2M | 0.0% | 2.3% | -4.4% |
| 6 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 308,896 | $7.1M | 0.0% | 1.8% | -15.5% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 284,836 | $6.6M | 0.0% | 1.6% | +115.5% |
| 8 | Connor, Clark & Lunn Investment Management Ltd. | 282,388 | $6.5M | 0.0% | 1.6% | +62.1% |
| 9 | TWO SIGMA INVESTMENTS, LP | 254,367 | $5.9M | 0.0% | 1.5% | -4.7% |
| 10 | JANE STREET GROUP, LLC | 249,465 | $5.8M | 0.0% | 1.4% | -26.8% |
| 11 | Qube Research & Technologies Ltd | 194,714 | $4.5M | 0.0% | 1.1% | +120.0% |
| 12 | CITADEL ADVISORS LLC | 106,246 | $2.5M | 0.0% | 0.6% | -0.6% |
| 13 | NORTHERN TRUST CORP | 91,857 | $2.1M | 0.0% | 0.5% | +135.5% |
| 14 | MILLENNIUM MANAGEMENT LLC | 90,626 | $2.1M | 0.0% | 0.5% | -80.0% |
| 15 | MORGAN STANLEY | 82,999 | $1.9M | 0.0% | 0.5% | +40.5% |
| 16 | RITHOLTZ WEALTH MANAGEMENT | 82,748 | $1.9M | 0.0% | 0.5% | +106.2% |
| 17 | VANGUARD FIDUCIARY TRUST CO | 81,805 | $1.9M | 0.0% | 0.5% | +29.2% |
| 18 | VANGUARD PORTFOLIO MANAGEMENT LLCNEW | 81,351 | $1.9M | 0.0% | 0.5% | new |
| 19 | Point72 Asset Management, L.P. | 79,684 | $1.8M | 0.0% | 0.5% | +167.8% |
| 20 | UBS Group AG | 79,085 | $1.8M | 0.0% | 0.5% | +9.1% |
| 21 | Merit Financial Group, LLC | 74,000 | $1.7M | 0.0% | 0.4% | +100.0% |
| 22 | BNP PARIBAS FINANCIAL MARKETS | 71,293 | $1.6M | 0.0% | 0.4% | +12.2% |
| 23 | LOS ANGELES CAPITAL MANAGEMENT LLCNEW | 63,562 | $1.5M | 0.0% | 0.4% | new |
| 24 | O'SHAUGHNESSY ASSET MANAGEMENT, LLC | 54,829 | $1.3M | 0.0% | 0.3% | +8.1% |
| 25 | GOLDMAN SACHS GROUP INC | 54,066 | $1.2M | 0.0% | 0.3% | +47.8% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.