As of November 6, 2026, 4 holders' latest Schedule 13D or 13G filings report owning 5% or more of Amtech Systems Inc. The largest reported stake is Piton Capital Partners LLC's, at 20.6%. 6 filings are on record since January 21, 2026 (Schedule 13D/A, June 2, 2026).
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Key facts
- · Reporting person: Wasatch Advisors LP · Sole voting: 1,098,377 · Shared voting: 0 · Sole dispositive: 1,184,904 · Shared dispositive: 0 · SCHEDULE 13G, 2026-10-09
- · Reporting person: First Eagle Investment Management, LLC · Sole voting: 848,697 · Shared voting: 0 · Sole dispositive: 848,697 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-08-06
- · Reporting person: Orin Hirschman · Sole voting: 1,252,000 · Shared voting: 0 · Sole dispositive: 1,252,000 · Shared dispositive: 0 · SCHEDULE 13G, 2026-07-27
- · Reporting person: Piton Capital Partners LLC · Sole voting: 600,000 · Shared voting: 0 · Sole dispositive: 600,000 · Shared dispositive: 0 · SCHEDULE 13D/A, 2026-06-02
- · Holder: Wax Asset Management, LLC · Percent: 9.2% · SCHEDULE 13G/A
Amtech Systems Inc has 6 Schedule 13D or 13G filings on record since 2026-01-21. 4 holders' latest filing reports 5% or more of common stock sh. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Piton Capital Partners LLC | 20.6% | 600,000 | SCHEDULE 13D/A, 2026-06-02 | 2026-06-01 |
| Wax Asset Management, LLC | 9.2% | 1,319,773 | SCHEDULE 13G/A, 2026-02-13 | 2025-12-31 |
| 7.2% | 1,252,000 | SCHEDULE 13G, 2026-07-27 | 2026-06-30 | |
| Wasatch Advisors LP | 6.8% | 1,184,904 | SCHEDULE 13G, 2026-10-09 | 2026-09-30 |
| First Eagle Investment Management, LLC | 4.9% | 848,697 | SCHEDULE 13G/A, 2026-08-06 | 2026-06-30 |
| Dimensional Fund Advisors LP | 4.7% | 672,107 | SCHEDULE 13G/A, 2026-01-21 | 2025-12-31 |
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More on Amtech Systems Inc and the records around it.
Amtech Systems Inc elsewhere on the record
- Leadership changes Aug 2026
- Who owns it
Companies that share a holder
- Piton Capital Partners LLC also filed stake reports on 1 other company: Gulf Island Fabrication, Inc. (Jan 2026)
- Wax Asset Management, LLC also filed stake reports on 6 other companies: CPS TECHNOLOGIES CORP (Feb 2026), FREQUENCY ELECTRONICS, INC (Feb 2026), Rocky Mountain Chocolate Factory, Inc (Feb 2026)
- First Eagle Investment Management, LLC also filed stake reports on 16 other companies: DENTSPLY SIRONA Inc. (Aug 2026), Quanterix Corp (Aug 2026), Warrior Met Coal Inc (Aug 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Piton Capital Partners LLC | 600,000 | 0 | 600,000 | 0 | SCHEDULE 13D/A, 2026-06-02 |
| Cornice Fiduciary Management LLC, as Trustee under Trust Agreement dated December 23, 1989 FBO the issue of Jonathan D. Sackler | 1,386,312 | 0 | 1,386,312 | 0 | SCHEDULE 13D/A, 2026-06-02 |
| Robert Averick | 0 | 2,986,341 | 0 | 2,986,341 | SCHEDULE 13D/A, 2026-06-02 |
| M3C Holdings LLC | 263,688 | 0 | 263,688 | 0 | SCHEDULE 13D/A, 2026-06-02 |
| Oih LLC | 22,917 | 0 | 22,917 | 0 | SCHEDULE 13D/A, 2026-06-02 |
| Orin Hirschman | 1,252,000 | 0 | 1,252,000 | 0 | SCHEDULE 13G, 2026-07-27 |
| AIGH Capital Management LLC | 1,252,000 | 0 | 1,252,000 | 0 | SCHEDULE 13G, 2026-07-27 |
| Wasatch Advisors LP | 1,098,377 | 0 | 1,184,904 | 0 | SCHEDULE 13G, 2026-10-09 |
| First Eagle Investment Management, LLC | 848,697 | 0 | 848,697 | 0 | SCHEDULE 13G/A, 2026-08-06 |
The latest filing identifies Amtech Systems Inc by CUSIP 032332504 and gives its principal executive office as 58 S RIVER DRIVE SUITE 370, Tempe, AZ 85288 (SCHEDULE 13G, 2026-10-09).
Source of funds (Item 3)
The first paragraph of the response to Item 3 is hereby amended and restated in its entirety to read as follows: As of June 2, 2026, the Reporting Persons had collectively acquired an aggregate of 3,009,258 Shares over the course of various prior purchases for total consideration of approximately $23 million. Each Reporting Person funded such prior purchases out of their available cash on hand (which, in the case of Reporting Persons that are entities, may include capital contributed by their respective owners). Additionally, Mr.Piton Capital Partners LLC, SCHEDULE 13D/A, 2026-06-02
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2026-01-21 | Dimensional Fund Advisors LP | 4.7% | SCHEDULE 13G/A |
| 2026-02-13 | Wax Asset Management, LLC | 9.2% | SCHEDULE 13G/A |
| 2026-06-02 | Piton Capital Partners LLC | 20.6% | SCHEDULE 13D/A |
| 2026-07-27 | Orin Hirschman | 7.2% | SCHEDULE 13G |
| 2026-08-06 | First Eagle Investment Management, LLC | 4.9% | SCHEDULE 13G/A |
| 2026-10-09 | Wasatch Advisors LP | 6.8% | SCHEDULE 13G |
Questions about who owns Amtech Systems Inc
Who owns Amtech Systems Inc?
On this page, 4 holders' latest ownership filings report 5% or more of Amtech Systems Inc: Piton Capital Partners LLC (20.6%, Schedule 13D/A, filed 2026-06-02), Wax Asset Management, LLC (9.2%, Schedule 13G/A, filed 2026-02-13), Orin Hirschman (7.2%, Schedule 13G, filed 2026-07-27) and Wasatch Advisors LP (6.8%, Schedule 13G, filed 2026-10-09).
Who are the largest shareholders of Amtech Systems Inc?
By the share each holder's latest filing reports, the largest holders of Amtech Systems Inc on this page are Piton Capital Partners LLC (20.6%), Wax Asset Management, LLC (9.2%) and Orin Hirschman (7.2%).
When did Piton Capital Partners LLC buy into Amtech Systems Inc?
The filings give report dates, not purchase dates. The earliest filing from Piton Capital Partners LLC on this page is the Schedule 13D/A, filed 2026-06-02, reporting 20.6%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 6 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for Amtech Systems Inc
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| August 5, 2026 | Leadership change: Robert C. Daigle departs, Chief Executive Officer, and 2 more | — | Leadership changes | Source |
| May 7, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | Source |
| April 30, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | Source |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.