Quick Takeaways
- DIMENSIONAL FUND ADVISORS LP filed SCHEDULE 13G/A for Amtech Systems Inc Common Stock (ASYS).
- Disclosed ownership: 4.7%.
- Date of event: 31 Dec 2025.
DIMENSIONAL FUND ADVISORS LP - 31 Dec 2025 SCHEDULE 13G/A Report for Amtech Systems Inc Common Stock (ASYS)
- Filing Manager
- DIMENSIONAL FUND ADVISORS LP
- Reporting Manager
- Dimensional Fund Advisors LP
- Security
- Amtech Systems Inc Common Stock
- Symbol
- ASYS
- Shares outstanding
- 14,300,149 shares
- Disclosed Ownership
- 672,107 shares
- Ownership
- 4.7%
- Form type
- SCHEDULE 13G/A
- Filing time
- 21 Jan 2026, 13:21:13 UTC
- Date of event
- 31 Dec 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"DIMENSIONAL FUND ADVISORS LP disclosed 4.7% ownership in Amtech Systems Inc Common Stock (ASYS) on 31 Dec 2025."
What Changed
- No earlier schedule filing is available for direct comparison.
- Current filing was accepted on 21 Jan 2026, 13:21.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Official SEC Source
Backed by Schedule 13D/13G
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
See Original FilingReporting Managers (1)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Dimensional Fund Advisors LP | 4.7% | 672,107 | 656,802 | 0 | Selwyn Notelovitz | Global Chief Compliance Officer |