Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in ASYS held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | First Eagle Investment Management, LLC | 832K | $9.7M | +13.4% | 5.741% | 0.01% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 564K | $6.6M | — | 3.892% | 0.00% |
| 3 | DIMENSIONAL FUND ADVISORS LP | 529K | $6.2M | -21.2% | 3.651% | 0.00% |
| 4 | MILLENNIUM MANAGEMENT LLC | 454K | $5.3M | +1894.0% | 3.128% | 0.00% |
| 5 | MARSHALL WACE, LLP | 417K | $4.9M | +18.3% | 2.877% | 0.01% |
| 6 | Pacific Ridge Capital Partners, LLC | 405K | $4.7M | -35.4% | 2.796% | 1.03% |
| 7 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 365K | $4.3M | +5.3% | 2.520% | 0.00% |
| 8 | JANE STREET GROUP, LLC | 341K | $4.0M | +4.6% | 2.351% | 0.04% |
| 9 | TWO SIGMA INVESTMENTS, LP | 267K | $3.1M | +139.5% | 1.841% | 0.00% |
| 10 | Connor, Clark & Lunn Investment Management Ltd. | 174K | $2.0M | +160.4% | 1.201% | 0.00% |
| 11 | Trexquant Investment LP | 174K | $2.0M | +94.6% | 1.199% | 0.02% |
| 12 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 169K | $2.0M | -21.9% | 1.163% | 0.00% |
| 13 | BlackRock, Inc. | 145K | $1.7M | +8.2% | 1.003% | 0.00% |
| 14 | GEODE CAPITAL MANAGEMENT, LLC | 132K | $1.5M | -0.6% | 0.911% | 0.00% |
| 15 | CITADEL ADVISORS LLC | 130K | $1.5M | +3.9% | 0.895% | 0.00% |
| 16 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 109K | $1.3M | +13.3% | 0.753% | 0.03% |
| 17 | RENAISSANCE TECHNOLOGIES LLC | 108K | $1.3M | -26.3% | 0.745% | 0.00% |
| 18 | Palisades Investment Partners, LLC | 101K | $1.2M | — | 0.694% | 0.46% |
| 19 | SEI INVESTMENTS CO | 93K | $1.1M | +104.5% | 0.638% | 0.00% |
| 20 | Qube Research & Technologies Ltd | 89K | $1.0M | +110.9% | 0.611% | 0.00% |
| 21 | XTX Topco Ltd | 75K | $871K | +7.5% | 0.515% | 0.02% |
| 22 | EAM Investors, LLC | 74K | $868K | 0.0% | 0.513% | 0.10% |
| 23 | UBS Group AG | 72K | $846K | +638.8% | 0.500% | 0.00% |
| 24 | BNP PARIBAS ARBITRAGE, SA | 64K | $742K | +139.2% | 0.438% | 0.00% |
| 25 | VANGUARD FIDUCIARY TRUST CO | 63K | $739K | — | 0.437% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in ASYS — a direct measure of their conviction.
Filings activity in ASYS during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 78 | +18% | 23.35% | +1.64 pp | $81M | +7.6% |
| Q4 2025 | 66 | +22% | 21.71% | +9.93 pp | $75M | +84% |
| Q3 2025 | 54 | +50% | 11.78% | +6.80 pp | $41M | +136% |
| Q2 2025 | 36 | 2.7% | 4.98% | 1.45 pp | $17M | 23% |
| Q1 2025 | 37 | +5.7% | 6.43% | 2.06 pp | $22M | 24% |
| Q4 2024 | 35 | 2.8% | 8.49% | 1.49 pp | $30M | 15% |
| Q3 2024 | 36 | +5.9% | 9.98% | 0.35 pp | $35M | 3.3% |
| Q2 2024 | 34 | — | 10.33% | — | $36M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ASYS stock.
Based on Q1 2026 13F filings, institutional ownership of Amtech Systems, Inc. stands at 23.4%, held across 78 reporting institutions.
First Eagle Investment Management, LLC is the largest reported institutional holder of ASYS, with approximately 832,453 shares worth $0.01B as of Q1 2026.
Yes — 6 widely-followed marquee investors appear among the top 25 institutional holders of ASYS, including MILLENNIUM MANAGEMENT LLC, JANE STREET GROUP, LLC, TWO SIGMA INVESTMENTS, LP, SUSQUEHANNA INTERNATIONAL GROUP, LLP, CITADEL ADVISORS LLC.
Our composite Smart Money Score for ASYS is 83 out of 100 (Strong Smart Money). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
21 institutions opened new positions in ASYS during Q1 2026, while 9 fully exited. 25 added to existing positions and 32 trimmed.
ASYS institutional ownership rose by 1.64 percentage points quarter-over-quarter, with a net change of +12 holders.
The top 10 institutions account for 62.6% of all reported 13F value in ASYS, and the top 25 account for 85.5%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Amtech Systems, Inc. (ASYS) Institutional Ownership