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 | — |
| 8-K |
Current report
Officer or director change, Other events
|
Aug 28, 2026 | Aug 24, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 10, 2026 | Aug 10, 2026 |
| 10-Q | Quarterly report | Aug 10, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Officer or director change
|
Jul 23, 2026 | Jul 17, 2026 |
| 8-K |
Current report
Officer or director change
|
Jul 2, 2026 | Jun 30, 2026 |
| S-8 | Employee stock plan registration | Jun 26, 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 |
| 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 |
| 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 |
| 10-K | Annual report | Mar 10, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Mar 10, 2026 | Mar 9, 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 |
| 8-K |
Current report
Material agreement
|
Dec 11, 2025 | Dec 9, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 5, 2025 | Nov 5, 2025 |
| 10-Q | Quarterly report | Nov 5, 2025 | Sep 30, 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 |
| 8-K |
Current report
Other events
|
Aug 6, 2025 | Aug 6, 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 |
| 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 |
| 8-K |
Current report
Officer or director change
|
Apr 2, 2025 | Mar 31, 2025 |
| 10-K | Annual report | Mar 5, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Mar 5, 2025 | Mar 5, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Feb 7, 2025 | Feb 7, 2025 |
| 8-K |
Current report
Material agreement, Agreement ended, New debt, Regulation FD disclosure
|
Jan 2, 2025 | Dec 27, 2024 |
| 10-Q | Quarterly report | Nov 7, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 7, 2024 | Nov 7, 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 | — |
| 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 |
| 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 | — |
| 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 |
| 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 |
| 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 |
| CORRESP | Letter to the SEC | Jan 29, 2024 | — |
| S-3/A | Filing | Jan 26, 2024 | — |
| 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 | — |
| 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 |
| 8-K |
Current report
Officer or director change, Other events
|
Sep 18, 2023 | Sep 18, 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 | — |
| 8-K |
Current report
Unregistered share sale, Officer or director change, Other events
|
Jul 17, 2023 | Jul 14, 2023 |
| 8-K |
Current report
Shareholder vote results
|
Jun 15, 2023 | Jun 13, 2023 |
| 8-K |
Current report
Material agreement
|
Jun 6, 2023 | Jun 2, 2023 |
| 8-K |
Current report
Results of operations
|
May 9, 2023 | May 9, 2023 |
| 10-Q | Quarterly report | May 9, 2023 | Mar 31, 2023 |
| ARS | Annual report to shareholders | Apr 27, 2023 | Dec 31, 2022 |
| DEFA14A | Additional proxy material | Apr 27, 2023 | — |
| DEF 14A | Proxy statement | Apr 27, 2023 | — |
| 8-A12B/A | Filing | Apr 14, 2023 | — |
| PRE 14A | Preliminary proxy statement | Apr 14, 2023 | — |
| 8-K |
Current report
Material agreement, Change to shareholder rights, Officer or director change
|
Apr 14, 2023 | Apr 11, 2023 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Mar 29, 2023 | Mar 27, 2023 |
| 8-K |
Current report
Results of operations
|
Mar 8, 2023 | Mar 8, 2023 |
| 10-K | Annual report | Mar 8, 2023 | Dec 31, 2022 |
| 8-K/A | Amended current report | Mar 2, 2023 | Feb 1, 2023 |
| 8-K |
Current report
Material agreement, Agreement ended, Acquisition or sale of assets, New debt, Unregistered share sale, Officer or director change, Bylaw or fiscal year change, Regulation FD disclosure
|
Feb 1, 2023 | Feb 1, 2023 |
| 425 | Filing | Nov 10, 2022 | — |
| 425 | Filing | Nov 9, 2022 | — |
| 8-K |
Current report
Results of operations
|
Nov 8, 2022 | Nov 8, 2022 |
| 10-Q | Quarterly report | Nov 8, 2022 | Sep 30, 2022 |
| 425 | Filing | Nov 7, 2022 | — |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Sep 6, 2022 | Sep 2, 2022 |
| 425 | Filing | Aug 23, 2022 | — |
| 425 | Filing | Aug 23, 2022 | — |
| 425 | Filing | Aug 22, 2022 | — |
| 8-K |
Current report
Material agreement, Unregistered share sale, Regulation FD disclosure
|
Aug 19, 2022 | Aug 19, 2022 |
| 8-K |
Current report
Results of operations
|
Aug 15, 2022 | Aug 15, 2022 |
| 10-Q | Quarterly report | Aug 15, 2022 | Jun 30, 2022 |
| S-8 POS | Filing | Aug 11, 2022 | — |
| S-8 | Employee stock plan registration | Jun 30, 2022 | — |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
May 17, 2022 | May 16, 2022 |
| 8-K |
Current report
Results of operations
|
May 9, 2022 | May 9, 2022 |
| 10-Q | Quarterly report | May 9, 2022 | Mar 31, 2022 |
| DEFA14A | Additional proxy material | May 5, 2022 | — |
| DEF 14A | Proxy statement | Mar 29, 2022 | Dec 31, 2021 |
| 8-A12B/A | Filing | Mar 16, 2022 | — |
| PRE 14A | Preliminary proxy statement | Mar 16, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Material agreement, Change to shareholder rights
|
Mar 16, 2022 | Mar 15, 2022 |
| 8-K |
Current report
Results of operations
|
Mar 8, 2022 | Mar 8, 2022 |
| 10-K | Annual report | Mar 8, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations, Other events
|
Nov 9, 2021 | Nov 9, 2021 |
| 10-Q | Quarterly report | Nov 9, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Officer or director change
|
Aug 18, 2021 | Aug 12, 2021 |
| 8-K |
Current report
Results of operations
|
Aug 9, 2021 | Aug 9, 2021 |
| 10-Q | Quarterly report | Aug 9, 2021 | Jun 30, 2021 |
| 8-K |
Current report
Material agreement, Agreement ended
|
Jul 29, 2021 | Jul 27, 2021 |
| 8-K |
Current report
Shareholder vote results
|
Jun 17, 2021 | Jun 15, 2021 |
| 8-K |
Current report
Agreement ended, Other events
|
Jun 3, 2021 | Jun 1, 2021 |
| 8-K |
Current report
Results of operations
|
May 10, 2021 | May 10, 2021 |
| 10-Q | Quarterly report | May 10, 2021 | Mar 31, 2021 |
| DEF 14A | Proxy statement | Apr 27, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Other events
|
Apr 23, 2021 | Apr 22, 2021 |
| 8-A12B/A | Filing | Apr 13, 2021 | — |
| PRE 14A | Preliminary proxy statement | Apr 13, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Material agreement, Change to shareholder rights, Officer or director change
|
Apr 13, 2021 | Apr 8, 2021 |
| 8-K |
Current report
Material agreement
|
Mar 29, 2021 | Mar 23, 2021 |
| 8-K |
Current report
Results of operations
|
Mar 10, 2021 | Mar 10, 2021 |
| 10-K | Annual report | Mar 10, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Officer or director change
|
Mar 3, 2021 | Feb 25, 2021 |
| 8-K |
Current report
Results of operations
|
Nov 9, 2020 | Nov 9, 2020 |
| 10-Q | Quarterly report | Nov 9, 2020 | Sep 30, 2020 |
| 8-K |
Current report
Material agreement, New debt
|
Sep 30, 2020 | Sep 30, 2020 |
| 8-K |
Current report
Material agreement
|
Sep 29, 2020 | Sep 29, 2020 |
| 8-K |
Current report
Results of operations
|
Aug 10, 2020 | Aug 10, 2020 |
| 10-Q | Quarterly report | Aug 10, 2020 | Jun 30, 2020 |
| 8-K |
Current report
Material agreement
|
Jul 7, 2020 | Jul 1, 2020 |
| 8-K |
Current report
Shareholder vote results
|
Jun 18, 2020 | Jun 16, 2020 |
| 8-K |
Current report
Material agreement, Results of operations, Officer or director change, Other events
|
May 11, 2020 | May 6, 2020 |
| 10-Q | Quarterly report | May 11, 2020 | Mar 31, 2020 |
| DEF 14A | Proxy statement | Apr 29, 2020 | Jun 16, 2020 |
| 8-K |
Current report
Material agreement, New debt
|
Apr 22, 2020 | Apr 20, 2020 |
| 8-A12B/A | Filing | Apr 9, 2020 | — |
| PRE 14A | Preliminary proxy statement | Apr 9, 2020 | Dec 31, 2019 |
| 8-K |
Current report
Material agreement, Change to shareholder rights
|
Apr 9, 2020 | Apr 8, 2020 |
| 8-K |
Current report
Officer or director change
|
Apr 1, 2020 | Mar 27, 2020 |
| 8-K |
Current report
Results of operations
|
Mar 16, 2020 | Mar 16, 2020 |
| 10-K | Annual report | Mar 16, 2020 | Dec 31, 2019 |
| 8-K |
Current report
Other events
|
Dec 2, 2019 | Nov 25, 2019 |
| 8-K |
Current report
Results of operations
|
Nov 12, 2019 | Nov 12, 2019 |
| 10-Q | Quarterly report | Nov 12, 2019 | Sep 30, 2019 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2019 | Aug 5, 2019 |
| 10-Q | Quarterly report | Aug 5, 2019 | Jun 30, 2019 |
| 8-K |
Current report
Shareholder vote results
|
Jun 20, 2019 | Jun 20, 2019 |
| CT ORDER | Filing | May 22, 2019 | — |
| DEFA14A | Additional proxy material | May 7, 2019 | — |
| 8-K |
Current report
Results of operations
|
May 6, 2019 | May 6, 2019 |
| 10-Q | Quarterly report | May 6, 2019 | Mar 31, 2019 |
| DEF 14A | Proxy statement | Apr 29, 2019 | Dec 31, 2018 |
| 8-K |
Current report
Officer or director change
|
Apr 29, 2019 | Apr 29, 2019 |
| 8-A12B/A | Filing | Apr 11, 2019 | — |
| PRE 14A | Preliminary proxy statement | Apr 11, 2019 | Dec 31, 2018 |
| 8-K |
Current report
Material agreement, Change to shareholder rights
|
Apr 11, 2019 | Apr 5, 2019 |
| 8-K |
Current report
Results of operations
|
Mar 18, 2019 | Mar 18, 2019 |
| 10-K | Annual report | Mar 18, 2019 | Dec 31, 2018 |
| 8-K |
Current report
Officer or director change
|
Mar 5, 2019 | Feb 27, 2019 |
| 8-K/A | Amended current report | Feb 20, 2019 | Dec 7, 2018 |
| 8-K |
Current report
Material agreement, Acquisition or sale of assets, New debt
|
Dec 13, 2018 | Dec 7, 2018 |
| 8-K |
Current report
Material agreement, Other events
|
Nov 15, 2018 | Nov 15, 2018 |
| 8-K |
Current report
Results of operations, Other events
|
Nov 6, 2018 | Nov 6, 2018 |
| 10-Q | Quarterly report | Nov 6, 2018 | Sep 30, 2018 |
| 8-K |
Current report
Material agreement
|
Oct 2, 2018 | Sep 30, 2018 |
| CT ORDER | Filing | Sep 7, 2018 | — |
| 8-K | Current report | Aug 21, 2018 | Aug 16, 2018 |
| 8-K |
Current report
Results of operations
|
Aug 6, 2018 | Aug 6, 2018 |
| 10-Q | Quarterly report | Aug 6, 2018 | Jun 30, 2018 |
| 8-K |
Current report
Material agreement
|
Jul 17, 2018 | Jul 11, 2018 |
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.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
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.