Comparable stake leader
PITON CAPITAL PARTNERS LLC
SEC ownership of AMTECH SYSTEMS INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000720500.
Disclosed value leader
PITON CAPITAL PARTNERS LLC
Comparable rows
50/50
Latest evidence
01 Jun 2026
- Public ticker
- ASYS on Nasdaq
- Parsed ownership sources
-
13D/G and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
PITON CAPITAL PARTNERS LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
PITON CAPITAL PARTNERS LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
01 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000720500
- Issuer location
- Tempe, AZ
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of AMTECH SYSTEMS INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
PITON CAPITAL PARTNERS LLC
Disclosed value leader
PITON CAPITAL PARTNERS LLC
Comparable rows
50/50
Latest evidence
01 Jun 2026
13D/G
13F
Lead comparable stake: 21%
13D/G row: PITON CAPITAL PARTNERS LLC
Showing 1-8 of 50 holder rows.
Quick read
PITON CAPITAL PARTNERS LLC leads the comparable SEC ownership view at 21%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens PITON CAPITAL PARTNERS LLC's linked filing trail.
Comparable ownership
Top 5
PITON CAPITAL PARTNERS LLC
21%
Wax Asset Management, LLC
9.2%
DIMENSIONAL FUND ADVISORS LP
4.7%
Pacific Ridge Capital Partners, LLC
4.6%
ROYCE & ASSOCIATES LP
4.1%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| PITON CAPITAL PARTNERS LLC |
13D/G
Robert Averick
|
21%
|
$64,176,468
2,986,341 shares
|
+$1,971,772 | 01 Jun 2026 |
| Wax Asset Management, LLC |
13D/G
|
9.2%
|
$17,091,060
1,319,773 shares
|
-$12,194,665 | 31 Dec 2025 |
| DIMENSIONAL FUND ADVISORS LP |
13D/G
13F
Company
|
4.7%
|
$8,434,943
672,107 shares
|
$0 | 31 Dec 2025 |
| Pacific Ridge Capital Partners, LLC |
13F
13D/G
Company
|
4.6%
from 13D/G
|
$4,734,733
405,371 shares
|
— | 31 Mar 2026 |
| ROYCE & ASSOCIATES LP |
13D/G
|
4.1%
|
$2,087,350
587,986 shares
|
-$3,164,165 | 31 Mar 2025 |
| First Eagle Investment Management, LLC |
13F
Company
|
5.7%
|
$9,723,051
832,453 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
3.9%
|
$6,591,339
564,327 shares
|
— | 31 Mar 2026 |
| ACADIAN ASSET MANAGEMENT LLC |
13F
Company
|
3.2%
|
$5,446,000
466,837 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 20 Jun 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-13 of 13 reporting-owner rows connected to AMTECH SYSTEMS INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
13
Largest Forms 3/4/5 holder
Robert M. Averick
Net 12M change
$0
Latest report
28 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Robert M. Averick | Director, 10%+ Owner | $8,778,249 | Mixed | 28 May 2026 | ||
| Jong S. Whang | Director | $903,303 | Mixed | 23 Aug 2022 | ||
| Michael Garnreiter | Director | $744,234 | Mixed | 04 Mar 2026 | ||
| Michael M. Ludwig | Director | $643,694 | Mixed | 04 Mar 2026 | ||
| Robert C. Daigle | Chairman & CEO, Director | $545,977 | Filing P/S | 08 Aug 2025 | ||
| Michael Whang | Chief Executive Officer, Director | $190,886 | Mixed | 01 Dec 2022 | ||
| Asif Y. Jakwani | Director | $186,913 | Mixed | 04 Mar 2026 | ||
| Wade Michael Jenke | Chief Financial Officer | $180,000 | Mixed | 19 Mar 2025 | ||
| Lisa D. Gibbs | VP and Chief Financial Officer, Director | $180,000 | Mixed | 15 Mar 2024 | ||
| Sukesh Mohan Power | Director | $42,060 | Mixed | 02 Mar 2022 | ||
| Guy Shechter | President & COO | Mixed | 19 May 2026 | |||
| Mark Weaver | Interim CFO | Mixed | 16 Dec 2025 | |||
| Thomas B. Sabol | Chief Financial Officer | Mixed | 14 May 2026 |
Recent insider transactions for AMTECH SYSTEMS INC
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Robert M. Averick | ASYS | Common Stock | Options Exercise | 2.54% | 18,000 | 725,341 | 28 May 2026 | Direct | ||
| Robert M. Averick | ASYS | Director Stock Option (Right to Buy) | Options Exercise | -100% | -12,000 | 0 | 28 May 2026 | Direct | ||
| Guy Shechter | ASYS | Amtech Systems, Inc. Employee Stock Option | Award | 50,000 | 50,000 | 19 May 2026 | Direct | |||
| Thomas B. Sabol | ASYS | Amtech Systems, Inc. Employee Stock Option | Award | 45,000 | 45,000 | 14 May 2026 | Direct | |||
| Michael M. Ludwig | ASYS | Amtech Systems, Inc. $0.01 par value common stock | Options Exercise | 32.3% | 8,081 | 33,069 | 05 Mar 2026 | Direct | ||
| Michael M. Ludwig | ASYS | Restricted Stock Units | Options Exercise | -74% | -8,081 | 2,839 | 05 Mar 2026 | Direct | ||
| Asif Y. Jakwani | ASYS | Amtech Systems, Inc. $0.01 par value common stock | Options Exercise | 8,081 | 8,081 | 05 Mar 2026 | Direct | |||
| Asif Y. Jakwani | ASYS | Restricted Stock Units | Options Exercise | -74% | -8,081 | 2,839 | 05 Mar 2026 | Direct | ||
| Robert M. Averick | ASYS | Common Stock | Options Exercise | 1.16% | 8,081 | 707,341 | 05 Mar 2026 | Direct | ||
| Robert M. Averick | ASYS | Restricted Stock Units | Options Exercise | -74% | -8,081 | 2,839 | 05 Mar 2026 | Direct | ||
| Michael Garnreiter | ASYS | Amtech Systems, Inc. $0.01 par value common stock | Options Exercise | 26.5% | 8,081 | 38,569 | 05 Mar 2026 | Direct | ||
| Michael Garnreiter | ASYS | Restricted Stock Units | Options Exercise | -74% | -8,081 | 2,839 | 05 Mar 2026 | Direct | ||
| Michael M. Ludwig | ASYS | Restricted Stock Units | Award | 2,839 | 2,839 | 04 Mar 2026 | Direct | |||
| Asif Y. Jakwani | ASYS | Restricted Stock Units | Award | 2,839 | 2,839 | 04 Mar 2026 | Direct | |||
| Robert M. Averick | ASYS | Restricted Stock Units | Award | 35.1% | 2,839 | 10,920 | 04 Mar 2026 | Direct | ||
| Michael Garnreiter | ASYS | Restricted Stock Units | Award | 2,839 | 2,839 | 04 Mar 2026 | Direct | |||
| Robert M. Averick | ASYS | Common Stock | Options Exercise | 3.55% | 24,000 | 699,260 | 02 Sep 2025 | Direct | ||
| Robert M. Averick | ASYS | Director Stock Option (Right to Buy) | Options Exercise | -57.1% | -24,000 | 18,000 | 02 Sep 2025 | Direct | ||
| Robert C. Daigle | ASYS | Amtech Systems, Inc. Employee Stock Option | Award | 100,000 | 100,000 | 08 Aug 2025 | Direct |
* marks a reported price that did not pass the local price check.