Axcelis Technologies Inc SEC filings ACLS
Axcelis Technologies Inc has 1,003 filings in SEC EDGAR's recent list, going back to May 29, 2012. Its latest annual report, Form ARS, was filed on Mar 31, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 5, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 5, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 10-Q | Quarterly report | Nov 5, 2026 | Sep 30, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 5, 2026 | — |
| 8-K |
Current report
Results of operations
|
Nov 5, 2026 | Nov 5, 2026 |
| 425 | Filing | Nov 2, 2026 | — |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Nov 2, 2026 | Nov 2, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Oct 27, 2026 | Oct 24, 2026 |
| 4 | Insider transaction | Sep 16, 2026 | Sep 15, 2026 |
| 4 | Insider transaction | Sep 16, 2026 | Sep 15, 2026 |
| 10-Q | Quarterly report | Aug 6, 2026 | Jun 30, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 6, 2026 | — |
| 8-K |
Current report
Results of operations
|
Aug 6, 2026 | Aug 6, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 15, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 14, 2026 | — |
| 4 | Insider transaction | Jun 17, 2026 | Jun 16, 2026 |
| 4 | Insider transaction | Jun 16, 2026 | Jun 15, 2026 |
| 4 | Insider transaction | Jun 4, 2026 | Jun 3, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 2, 2026 |
| 144 | Notice of proposed sale | Jun 3, 2026 | — |
| 144 | Notice of proposed sale | Jun 2, 2026 | — |
| 4 | Insider transaction | May 28, 2026 | May 27, 2026 |
| 144 | Notice of proposed sale | May 27, 2026 | — |
| SD | Specialized disclosure (conflict minerals) | May 27, 2026 | — |
| 4 | Insider transaction | May 26, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 22, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 22, 2026 | May 21, 2026 |
| 144 | Notice of proposed sale | May 22, 2026 | — |
| 144 | Notice of proposed sale | May 22, 2026 | — |
| 4 | Insider transaction | May 21, 2026 | May 20, 2026 |
| 144 | Notice of proposed sale | May 21, 2026 | — |
| 4 | Insider transaction | May 20, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 18, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 18, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 18, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 18, 2026 |
| 144 | Notice of proposed sale | May 20, 2026 | — |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 144 | Notice of proposed sale | May 19, 2026 | — |
| 144 | Notice of proposed sale | May 19, 2026 | — |
| 144 | Notice of proposed sale | May 19, 2026 | — |
| 4 | Insider transaction | May 18, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 15, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 15, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 14, 2026 | May 13, 2026 |
| 4 | Insider transaction | May 14, 2026 | May 13, 2026 |
| 144 | Notice of proposed sale | May 14, 2026 | — |
| 144 | Notice of proposed sale | May 14, 2026 | — |
| 4 | Insider transaction | May 13, 2026 | May 12, 2026 |
| 144 | Notice of proposed sale | May 13, 2026 | — |
| 144 | Notice of proposed sale | May 13, 2026 | — |
| 144 | Notice of proposed sale | May 12, 2026 | — |
| 10-Q | Quarterly report | May 8, 2026 | Mar 31, 2026 |
| 4 | Insider transaction | May 7, 2026 | May 6, 2026 |
| 8-K |
Current report
Results of operations
|
May 7, 2026 | May 7, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 7, 2026 | — |
| 144 | Notice of proposed sale | May 6, 2026 | — |
| 8-K |
Current report
Shareholder vote results
|
May 6, 2026 | May 5, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | May 6, 2026 | — |
| 4 | Insider transaction | May 4, 2026 | May 1, 2026 |
| 144 | Notice of proposed sale | May 1, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| 425 | Filing | Apr 29, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 28, 2026 | — |
| 4 | Insider transaction | Apr 21, 2026 | Apr 20, 2026 |
| 4 | Insider transaction | Apr 2, 2026 | Apr 1, 2026 |
| 144 | Notice of proposed sale | Apr 1, 2026 | — |
| ARS | Annual report to shareholders | Mar 31, 2026 | Dec 31, 2025 |
| DEF 14A | Proxy statement | Mar 31, 2026 | May 5, 2026 |
| 4 | Insider transaction | Mar 26, 2026 | Mar 24, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| 3 | Initial insider ownership | Mar 25, 2026 | Mar 12, 2026 |
| 3 | Initial insider ownership | Mar 24, 2026 | Mar 12, 2026 |
| 144 | Notice of proposed sale | Mar 24, 2026 | — |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Mar 12, 2026 | Mar 10, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Mar 2, 2026 |
| 10-K | Annual report | Feb 26, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Feb 23, 2026 | Feb 20, 2026 |
| 144 | Notice of proposed sale | Feb 20, 2026 | — |
| 8-K |
Current report
Results of operations
|
Feb 17, 2026 | Feb 17, 2026 |
| 425 | Filing | Feb 12, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 12, 2026 | — |
| 425 | Filing | Feb 6, 2026 | — |
| 8-K |
Current report
Shareholder vote results, Regulation FD disclosure
|
Feb 6, 2026 | Feb 6, 2026 |
| 425 | Filing | Feb 2, 2026 | — |
| 8-K |
Current report
Other events
|
Feb 2, 2026 | Jan 22, 2026 |
| 8-K |
Current report
Other events
|
Jan 28, 2026 | Jan 28, 2026 |
| 425 | Filing | Jan 28, 2026 | — |
| 4 | Insider transaction | Jan 16, 2026 | Jan 15, 2026 |
| EFFECT | Filing | Dec 31, 2025 | — |
| 424B3 | Prospectus | Dec 31, 2025 | — |
| CORRESP | Letter to the SEC | Dec 29, 2025 | — |
| S-4/A | Filing | Dec 29, 2025 | — |
| 3 | Initial insider ownership | Dec 22, 2025 | Dec 19, 2025 |
| 4 | Insider transaction | Dec 18, 2025 | Dec 17, 2025 |
| 4 | Insider transaction | Dec 18, 2025 | Dec 16, 2025 |
| 144 | Notice of proposed sale | Dec 17, 2025 | — |
| 4 | Insider transaction | Dec 12, 2025 | Dec 11, 2025 |
| 144 | Notice of proposed sale | Dec 11, 2025 | — |
| S-4 | Registration for a merger or exchange | Dec 8, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| 10-Q | Quarterly report | Nov 6, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 4, 2025 | Nov 4, 2025 |
| 4 | Insider transaction | Oct 17, 2025 | Oct 16, 2025 |
| 425 | Filing | Oct 1, 2025 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Oct 1, 2025 | Oct 1, 2025 |
| 425 | Filing | Oct 1, 2025 | — |
| 8-K |
Current report
Material agreement, Other events
|
Oct 1, 2025 | Oct 1, 2025 |
| 4 | Insider transaction | Sep 17, 2025 | Sep 15, 2025 |
| 4 | Insider transaction | Sep 17, 2025 | Sep 15, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 14, 2025 | — |
| 10-Q | Quarterly report | Aug 5, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2025 | Aug 5, 2025 |
| 4 | Insider transaction | Jun 17, 2025 | Jun 16, 2025 |
| 4 | Insider transaction | Jun 17, 2025 | Jun 16, 2025 |
| S-8 | Employee stock plan registration | May 29, 2025 | — |
| 4 | Insider transaction | May 21, 2025 | May 20, 2025 |
| 144 | Notice of proposed sale | May 20, 2025 | — |
| 4 | Insider transaction | May 20, 2025 | May 16, 2025 |
| 4 | Insider transaction | May 20, 2025 | May 16, 2025 |
| 4 | Insider transaction | May 19, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 19, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 19, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 19, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 19, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 15, 2025 |
| 8-K |
Current report
Officer or director change, Shareholder vote results, Other events
|
May 8, 2025 | May 7, 2025 |
| 10-Q | Quarterly report | May 6, 2025 | Mar 31, 2025 |
| SD | Specialized disclosure (conflict minerals) | May 6, 2025 | — |
| 8-K |
Current report
Results of operations
|
May 6, 2025 | May 6, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 29, 2025 | — |
| 4 | Insider transaction | Apr 22, 2025 | Apr 21, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 21, 2025 | Apr 21, 2025 |
| ARS | Annual report to shareholders | Mar 31, 2025 | Dec 31, 2024 |
| DEF 14A | Proxy statement | Mar 31, 2025 | May 7, 2025 |
| 8-K |
Current report
Other events
|
Mar 12, 2025 | Mar 12, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 10-K | Annual report | Feb 28, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 10, 2025 | Feb 10, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 30, 2025 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 10, 2025 | Jan 10, 2025 |
| 4 | Insider transaction | Jan 7, 2025 | Jan 3, 2025 |
| 4 | Insider transaction | Dec 16, 2024 | Dec 16, 2024 |
| 3 | Initial insider ownership | Dec 12, 2024 | Dec 12, 2024 |
| 4/A | Filing | Nov 19, 2024 | Sep 16, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 8, 2024 | — |
| 10-Q | Quarterly report | Nov 7, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 6, 2024 | Nov 6, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Oct 18, 2024 | — |
| 4/A | Filing | Oct 17, 2024 | Oct 16, 2024 |
| 4 | Insider transaction | Oct 17, 2024 | Oct 16, 2024 |
| 4 | Insider transaction | Sep 17, 2024 | Sep 16, 2024 |
| 4 | Insider transaction | Sep 17, 2024 | Sep 16, 2024 |
| 144 | Notice of proposed sale | Aug 29, 2024 | — |
| 4 | Insider transaction | Aug 6, 2024 | Aug 6, 2024 |
| 144 | Notice of proposed sale | Aug 6, 2024 | — |
| 10-Q | Quarterly report | Aug 1, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Jul 31, 2024 | Jul 31, 2024 |
| 8-K |
Current report
Results of operations
|
Jul 9, 2024 | Jul 9, 2024 |
| 4 | Insider transaction | Jun 24, 2024 | Jun 20, 2024 |
| 4 | Insider transaction | Jun 18, 2024 | Jun 17, 2024 |
| 4 | Insider transaction | Jun 18, 2024 | Jun 17, 2024 |
| 4 | Insider transaction | Jun 5, 2024 | Jun 5, 2024 |
| 4 | Insider transaction | Jun 5, 2024 | Jun 5, 2024 |
| 144 | Notice of proposed sale | May 30, 2024 | — |
| 4 | Insider transaction | May 20, 2024 | May 20, 2024 |
| 4 | Insider transaction | May 20, 2024 | May 17, 2024 |
| 4 | Insider transaction | May 20, 2024 | May 17, 2024 |
| 4 | Insider transaction | May 20, 2024 | May 17, 2024 |
| 144 | Notice of proposed sale | May 20, 2024 | — |
| 4 | Insider transaction | May 17, 2024 | May 15, 2024 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Special Industry Machinery, NEC (SIC 3559)
- Listed as
- ACLS (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Beverly, MA
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1113232
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.