Arq, Inc. SEC filings ARQ
Arq, Inc. has 813 filings in SEC EDGAR's recent list, going back to Mar 14, 2011. Its latest annual report, Form ARS, was filed on Apr 28, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 4, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 4, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 8-K |
Current report
Results of operations
|
Nov 4, 2026 | Nov 4, 2026 |
| 10-Q | Quarterly report | Nov 4, 2026 | Sep 30, 2026 |
| S-8 | Employee stock plan registration | Sep 17, 2026 | — |
| 4 | Insider transaction | Sep 10, 2026 | Sep 8, 2026 |
| 4 | Insider transaction | Sep 9, 2026 | Sep 4, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 3, 2026 | Sep 1, 2026 |
| 8-K |
Current report
Officer or director change, Other events
|
Aug 28, 2026 | Aug 24, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 14, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 10, 2026 | Aug 10, 2026 |
| 10-Q | Quarterly report | Aug 10, 2026 | Jun 30, 2026 |
| 4 | Insider transaction | Aug 4, 2026 | Jul 31, 2026 |
| 4 | Insider transaction | Aug 4, 2026 | Aug 1, 2026 |
| 4 | Insider transaction | Aug 4, 2026 | Aug 1, 2026 |
| 3 | Initial insider ownership | Aug 4, 2026 | Jul 27, 2026 |
| 4 | Insider transaction | Jul 23, 2026 | Jul 17, 2026 |
| 8-K |
Current report
Officer or director change
|
Jul 23, 2026 | Jul 17, 2026 |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 8-K |
Current report
Officer or director change
|
Jul 2, 2026 | Jun 30, 2026 |
| S-8 | Employee stock plan registration | Jun 26, 2026 | — |
| 3 | Initial insider ownership | Jun 24, 2026 | Jun 14, 2026 |
| 8-K |
Current report
Officer or director change
|
Jun 18, 2026 | Jun 14, 2026 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 11, 2026 | Jun 10, 2026 |
| 8-K |
Current report
Officer or director change, Other events
|
May 27, 2026 | May 20, 2026 |
| 4 | Insider transaction | May 6, 2026 | May 4, 2026 |
| 8-K |
Current report
Results of operations
|
May 6, 2026 | May 6, 2026 |
| 10-Q | Quarterly report | May 6, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Officer or director change
|
May 1, 2026 | Apr 29, 2026 |
| ARS | Annual report to shareholders | Apr 28, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Apr 28, 2026 | — |
| DEF 14A | Proxy statement | Apr 28, 2026 | Dec 31, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 27, 2026 | — |
| 8-A12B/A | Filing | Apr 17, 2026 | — |
| PRE 14A | Preliminary proxy statement | Apr 17, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Material agreement, Change to shareholder rights
|
Apr 17, 2026 | Apr 15, 2026 |
| 8-K |
Current report
Material agreement
|
Apr 1, 2026 | Mar 31, 2026 |
| 4 | Insider transaction | Mar 25, 2026 | Mar 23, 2026 |
| 4 | Insider transaction | Mar 25, 2026 | Mar 23, 2026 |
| 4 | Insider transaction | Mar 25, 2026 | Mar 23, 2026 |
| 4 | Insider transaction | Mar 25, 2026 | Mar 23, 2026 |
| 4 | Insider transaction | Mar 24, 2026 | Mar 23, 2026 |
| 4 | Insider transaction | Mar 19, 2026 | Mar 17, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 16, 2026 | Mar 12, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Mar 12, 2026 | — |
| 10-K | Annual report | Mar 10, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Mar 10, 2026 | Mar 9, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 8-K |
Current report
Material agreement
|
Mar 3, 2026 | Feb 27, 2026 |
| 8-K |
Current report
Material agreement
|
Jan 29, 2026 | Jan 28, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 28, 2026 | — |
| 8-K |
Current report
Material agreement
|
Dec 11, 2025 | Dec 9, 2025 |
| 4 | Insider transaction | Nov 13, 2025 | Nov 10, 2025 |
| 4 | Insider transaction | Nov 13, 2025 | Nov 11, 2025 |
| 4 | Insider transaction | Nov 12, 2025 | Nov 10, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 5, 2025 | Nov 5, 2025 |
| 10-Q | Quarterly report | Nov 5, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Oct 6, 2025 | Sep 25, 2025 |
| 4 | Insider transaction | Sep 19, 2025 | Sep 18, 2025 |
| 8-K/A |
Amended current report
Shareholder vote results
|
Aug 14, 2025 | Jun 3, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 11, 2025 | Aug 11, 2025 |
| 10-Q | Quarterly report | Aug 11, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Aug 6, 2025 | Aug 4, 2025 |
| 4 | Insider transaction | Aug 6, 2025 | Aug 4, 2025 |
| 4 | Insider transaction | Aug 6, 2025 | Aug 4, 2025 |
| 4 | Insider transaction | Aug 6, 2025 | Aug 4, 2025 |
| 8-K |
Current report
Other events
|
Aug 6, 2025 | Aug 6, 2025 |
| 4 | Insider transaction | Jul 3, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 3, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 3, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 3, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 3, 2025 | Jul 1, 2025 |
| 8-K |
Current report
Auditor change
|
Jun 9, 2025 | Jun 3, 2025 |
| 8-K |
Current report
Officer or director change, Shareholder vote results, Other events
|
Jun 6, 2025 | Jun 3, 2025 |
| 4 | Insider transaction | May 28, 2025 | May 23, 2025 |
| 4 | Insider transaction | May 28, 2025 | May 23, 2025 |
| 4 | Insider transaction | May 27, 2025 | May 23, 2025 |
| 4 | Insider transaction | May 20, 2025 | May 16, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 13, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 12, 2025 |
| 4 | Insider transaction | May 13, 2025 | May 9, 2025 |
| 8-K |
Current report
Results of operations
|
May 7, 2025 | May 7, 2025 |
| 10-Q | Quarterly report | May 7, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Other events
|
May 6, 2025 | May 6, 2025 |
| ARS | Annual report to shareholders | Apr 21, 2025 | Dec 31, 2024 |
| DEFA14A | Additional proxy material | Apr 21, 2025 | — |
| DEF 14A | Proxy statement | Apr 21, 2025 | Dec 31, 2024 |
| 8-A12B/A | Filing | Apr 11, 2025 | — |
| PRE 14A | Preliminary proxy statement | Apr 11, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Material agreement, Change to shareholder rights
|
Apr 11, 2025 | Apr 8, 2025 |
| 4 | Insider transaction | Apr 4, 2025 | Apr 2, 2025 |
| 3 | Initial insider ownership | Apr 4, 2025 | Apr 2, 2025 |
| 8-K |
Current report
Officer or director change
|
Apr 2, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Mar 25, 2025 | Mar 23, 2025 |
| 4 | Insider transaction | Mar 25, 2025 | Mar 23, 2025 |
| 4 | Insider transaction | Mar 25, 2025 | Mar 23, 2025 |
| 4 | Insider transaction | Mar 25, 2025 | Mar 23, 2025 |
| 4 | Insider transaction | Mar 25, 2025 | Mar 23, 2025 |
| 10-K | Annual report | Mar 5, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Mar 5, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Feb 14, 2025 | Feb 12, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Feb 7, 2025 | Feb 7, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 29, 2025 | — |
| 8-K |
Current report
Material agreement, Agreement ended, New debt, Regulation FD disclosure
|
Jan 2, 2025 | Dec 27, 2024 |
| 4 | Insider transaction | Nov 27, 2024 | Nov 26, 2024 |
| 4 | Insider transaction | Nov 27, 2024 | Nov 26, 2024 |
| 4 | Insider transaction | Nov 27, 2024 | Nov 26, 2024 |
| 4 | Insider transaction | Nov 21, 2024 | Nov 20, 2024 |
| 4 | Insider transaction | Nov 21, 2024 | Nov 20, 2024 |
| 10-Q | Quarterly report | Nov 7, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 7, 2024 | Nov 7, 2024 |
| 4 | Insider transaction | Sep 24, 2024 | Sep 23, 2024 |
| 424B5 | Prospectus supplement | Sep 20, 2024 | — |
| 8-K |
Current report
Material agreement, Agreement ended, Other events
|
Sep 20, 2024 | Sep 17, 2024 |
| 424B5 | Prospectus supplement | Sep 19, 2024 | — |
| 4 | Insider transaction | Sep 18, 2024 | Sep 18, 2024 |
| EFFECT | Filing | Sep 4, 2024 | — |
| CORRESP | Letter to the SEC | Aug 30, 2024 | — |
| UPLOAD | Letter from the SEC | Aug 29, 2024 | — |
| S-3 | Shelf registration | Aug 23, 2024 | — |
| 8-K |
Current report
Results of operations
|
Aug 12, 2024 | Aug 12, 2024 |
| 10-Q | Quarterly report | Aug 12, 2024 | Jun 30, 2024 |
| 4 | Insider transaction | Aug 5, 2024 | Aug 1, 2024 |
| 4 | Insider transaction | Aug 5, 2024 | Aug 1, 2024 |
| 4 | Insider transaction | Aug 5, 2024 | Aug 1, 2024 |
| 4 | Insider transaction | Aug 5, 2024 | Aug 1, 2024 |
| 4 | Insider transaction | Aug 5, 2024 | Aug 1, 2024 |
| 4 | Insider transaction | Jul 25, 2024 | Jul 23, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| S-8 | Employee stock plan registration | Jul 1, 2024 | — |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 13, 2024 | Jun 10, 2024 |
| EFFECT | Filing | Jun 6, 2024 | — |
| 424B3 | Prospectus | Jun 6, 2024 | — |
| CORRESP | Letter to the SEC | Jun 4, 2024 | — |
| UPLOAD | Letter from the SEC | Jun 4, 2024 | — |
| SC 13G | Ownership over 5% (passive) | May 30, 2024 | — |
| S-3 | Shelf registration | May 28, 2024 | — |
| 8-K |
Current report
Material agreement, Unregistered share sale, Regulation FD disclosure
|
May 16, 2024 | May 15, 2024 |
| 10-Q | Quarterly report | May 8, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 8, 2024 | May 8, 2024 |
| 3 | Initial insider ownership | May 2, 2024 | Apr 26, 2024 |
| ARS | Annual report to shareholders | Apr 29, 2024 | Dec 31, 2023 |
| DEFA14A | Additional proxy material | Apr 29, 2024 | — |
| DEF 14A | Proxy statement | Apr 29, 2024 | Dec 31, 2023 |
| 8-A12B/A | 8-a12b | Apr 16, 2024 | — |
| PRE 14A | Preliminary proxy statement | Apr 16, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Material agreement, Change to shareholder rights
|
Apr 16, 2024 | Apr 15, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Mar 29, 2024 |
| 4/A | Form 4/a | Mar 27, 2024 | Mar 18, 2024 |
| 4/A | Form 4/a | Mar 27, 2024 | Mar 23, 2024 |
| 4/A | Form 4/a | Mar 27, 2024 | Mar 23, 2024 |
| 4/A | Form 4/a | Mar 27, 2024 | Mar 23, 2024 |
| 4 | Insider transaction | Mar 26, 2024 | Mar 23, 2024 |
| 4 | Insider transaction | Mar 26, 2024 | Mar 23, 2024 |
| 4 | Insider transaction | Mar 26, 2024 | Mar 23, 2024 |
| 4 | Insider transaction | Mar 26, 2024 | Mar 18, 2024 |
| 8-K |
Current report
Results of operations
|
Mar 12, 2024 | Mar 12, 2024 |
| 10-K | Annual report | Mar 12, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Material agreement
|
Feb 13, 2024 | Feb 8, 2024 |
| EFFECT | Filing | Jan 31, 2024 | — |
| 8-K |
Current report
Bylaw or fiscal year change, Other events
|
Jan 31, 2024 | Jan 31, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Jan 31, 2024 | — |
| CORRESP | Letter to the SEC | Jan 29, 2024 | — |
| S-3/A | Filing | Jan 26, 2024 | — |
| 4/A | Form 4/a | Jan 25, 2024 | Jul 20, 2023 |
| 4/A | Form 4/a | Jan 25, 2024 | Mar 9, 2023 |
| 8-K |
Current report
Material agreement, Other events
|
Jan 24, 2024 | Jan 19, 2024 |
| UPLOAD | Letter from the SEC | Jan 10, 2024 | — |
| S-1 | Registration statement | Jan 4, 2024 | — |
| 4 | Insider transaction | Nov 21, 2023 | Nov 17, 2023 |
| 4/A | Form 4/a | Nov 21, 2023 | Nov 15, 2023 |
| 4 | Insider transaction | Nov 20, 2023 | Nov 16, 2023 |
| 4 | Insider transaction | Nov 17, 2023 | Nov 15, 2023 |
| 3 | Initial insider ownership | Nov 15, 2023 | Nov 6, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 8, 2023 | Nov 8, 2023 |
| 10-Q | Quarterly report | Nov 8, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Officer or director change
|
Nov 8, 2023 | Nov 6, 2023 |
| 4 | Insider transaction | Sep 20, 2023 | Sep 18, 2023 |
| 3 | Initial insider ownership | Sep 20, 2023 | Sep 18, 2023 |
| 8-K |
Current report
Officer or director change, Other events
|
Sep 18, 2023 | Sep 18, 2023 |
| 4 | Insider transaction | Aug 21, 2023 | Aug 17, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 9, 2023 | Aug 9, 2023 |
| 10-Q | Quarterly report | Aug 9, 2023 | Jun 30, 2023 |
| 8-K/A |
Amended current report
Officer or director change
|
Aug 3, 2023 | Jul 14, 2023 |
| S-8 | Employee stock plan registration | Jul 25, 2023 | — |
| 4 | Insider transaction | Jul 24, 2023 | Jul 20, 2023 |
| 4 | Insider transaction | Jul 24, 2023 | Jul 20, 2023 |
| 4 | Insider transaction | Jul 24, 2023 | Jul 20, 2023 |
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
- Miscellaneous Chemical Products (SIC 2890)
- Listed as
- ARQ (Nasdaq)
- Fiscal year ends
- December 31
- Headquarters
- Greenwood Village, CO
- SEC filer status
- Accelerated filer, Smaller reporting company
- SEC CIK
- 1515156
- Former names
- Advanced Emissions Solutions, Inc. (until Jan 31, 2024)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.