Who owns AMTECH SYSTEMS INC?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of ASYS from SEC Form 13F filings across 112 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.
As of the 2026-06-30 reporting period, 112 institutions disclosed 10.5M shares of AMTECH SYSTEMS INC worth $241.5M — about 67.8% of shares outstanding; the largest disclosed holder is AIGH Capital Management LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
112
13F holders
$241.5M
value, 2026 filers
67.8%
of shares outstanding (10.5M sh)
46
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 | AIGH Capital Management LLCNEW | 1.3M | $28.9M | 1.8% | 8.1% | new |
| 2 | First Eagle Investment Management, LLC | 848,426 | $19.6M | 0.0% | 5.5% | +1.9% |
| 3 | BlackRock, Inc. | 763,487 | $17.6M | 0.0% | 4.9% | +424.9% |
| 4 | AWM Investment Company, Inc.NEW | 690,000 | $15.9M | 1.4% | 4.5% | new |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 580,502 | $13.4M | 0.0% | 3.8% | +2.9% |
| 6 | ACADIAN ASSET MANAGEMENT LLC | 580,278 | $13.4M | 0.0% | 3.8% | +24.3% |
| 7 | DIMENSIONAL FUND ADVISORS LP | 426,694 | $9.8M | 0.0% | 2.8% | -19.4% |
| 8 | MARSHALL WACE, LLP | 398,564 | $9.2M | 0.0% | 2.6% | -4.4% |
| 9 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 308,896 | $7.1M | 0.0% | 2% | -15.5% |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | 284,836 | $6.6M | 0.0% | 1.8% | +115.5% |
| 11 | Connor, Clark & Lunn Investment Management Ltd. | 282,388 | $6.5M | 0.0% | 1.8% | +62.1% |
| 12 | RENAISSANCE TECHNOLOGIES LLC | 260,605 | $6.0M | 0.0% | 1.7% | +141.1% |
| 13 | TWO SIGMA INVESTMENTS, LP | 254,367 | $5.9M | 0.0% | 1.6% | -4.7% |
| 14 | JANE STREET GROUP, LLC | 249,465 | $5.8M | 0.0% | 1.6% | -26.8% |
| 15 | Regal Partners LtdNEW | 237,503 | $5.5M | 0.3% | 1.5% | new |
| 16 | Qube Research & Technologies Ltd | 194,714 | $4.5M | 0.0% | 1.3% | +120.0% |
| 17 | STATE STREET CORP | 155,849 | $3.6M | 0.0% | 1% | +171.8% |
| 18 | Trexquant Investment LP | 119,750 | $2.8M | 0.0% | 0.8% | -31.1% |
| 19 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 111,472 | $2.6M | 0.0% | 0.7% | +2.2% |
| 20 | CITADEL ADVISORS LLC | 106,246 | $2.5M | 0.0% | 0.7% | -0.6% |
| 21 | Palisades Investment Partners, LLC | 102,691 | $2.4M | 0.7% | 0.7% | +2.0% |
| 22 | NORTHERN TRUST CORP | 91,857 | $2.1M | 0.0% | 0.6% | +135.5% |
| 23 | MILLENNIUM MANAGEMENT LLC | 90,626 | $2.1M | 0.0% | 0.6% | -80.0% |
| 24 | MORGAN STANLEY | 82,999 | $1.9M | 0.0% | 0.5% | +40.5% |
| 25 | VANGUARD FIDUCIARY TRUST CO | 81,805 | $1.9M | 0.0% | 0.5% | +29.2% |
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.