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-A12B/A | Filing | Apr 17, 2026 | — |
| 8-A12B/A | Filing | Apr 11, 2025 | — |
| EFFECT | Filing | Sep 4, 2024 | — |
| CORRESP | Letter to the SEC | Aug 30, 2024 | — |
| UPLOAD | Letter from the SEC | Aug 29, 2024 | — |
| EFFECT | Filing | Jun 6, 2024 | — |
| CORRESP | Letter to the SEC | Jun 4, 2024 | — |
| UPLOAD | Letter from the SEC | Jun 4, 2024 | — |
| 8-A12B/A | 8-a12b | Apr 16, 2024 | — |
| EFFECT | Filing | Jan 31, 2024 | — |
| CORRESP | Letter to the SEC | Jan 29, 2024 | — |
| UPLOAD | Letter from the SEC | Jan 10, 2024 | — |
| 8-A12B/A | Filing | Apr 14, 2023 | — |
| 425 | Filing | Nov 10, 2022 | — |
| 425 | Filing | Nov 9, 2022 | — |
| 425 | Filing | Nov 7, 2022 | — |
| 425 | Filing | Aug 23, 2022 | — |
| 425 | Filing | Aug 23, 2022 | — |
| 425 | Filing | Aug 22, 2022 | — |
| 8-A12B/A | Filing | Mar 16, 2022 | — |
| 8-A12B/A | Filing | Apr 13, 2021 | — |
| 8-A12B/A | Filing | Apr 9, 2020 | — |
| CT ORDER | Filing | May 22, 2019 | — |
| 8-A12B/A | Filing | Apr 11, 2019 | — |
| CT ORDER | Filing | Sep 7, 2018 | — |
| 11-K | Employee savings plan report | Jun 26, 2018 | Dec 31, 2017 |
| 8-A12B/A | Filing | Apr 11, 2018 | — |
| 11-K | Employee savings plan report | Jun 28, 2017 | Dec 31, 2016 |
| SC TO-I/A | Filing | Jun 13, 2017 | — |
| SC TO-I/A | Filing | Jun 7, 2017 | — |
| CT ORDER | Filing | May 24, 2017 | — |
| SD | Specialized disclosure (conflict minerals) | May 22, 2017 | — |
| SC TO-I/A | Filing | May 18, 2017 | — |
| CORRESP | Letter to the SEC | May 18, 2017 | — |
| UPLOAD | Letter from the SEC | May 15, 2017 | — |
| SC TO-I | Filing | May 8, 2017 | — |
| 15-12G | Deregistration | May 8, 2017 | — |
| 8-A12B | Filing | May 8, 2017 | — |
| CERTNAS | Auto-generated paper document | Jul 7, 2016 | — |
| 8-A12B | Filing | Jul 6, 2016 | — |
| 11-K | Employee savings plan report | Jun 28, 2016 | Dec 31, 2015 |
| SD | Specialized disclosure (conflict minerals) | May 23, 2016 | — |
| CT ORDER | Filing | Apr 8, 2016 | — |
| NT 10-K | Filing | Mar 15, 2016 | Dec 31, 2015 |
| CT ORDER | Filing | Mar 4, 2016 | — |
| CT ORDER | Filing | Mar 4, 2016 | — |
| 8-A12G/A | Filing | Dec 17, 2015 | — |
| NT 10-Q | 12b-25 | Nov 10, 2015 | Sep 30, 2015 |
| 11-K | Employee savings plan report | Oct 15, 2015 | Dec 31, 2014 |
| NT 10-Q | 12b-25 | Aug 10, 2015 | Jun 30, 2015 |
| NT 11-K | 12b-25 | Jun 30, 2015 | Dec 31, 2014 |
| SD | Specialized disclosure (conflict minerals) | May 29, 2015 | — |
| NT 10-Q | 12b-25 | May 12, 2015 | Mar 31, 2015 |
| 25-NSE | Delisting notice | Mar 20, 2015 | — |
| NT 10-K | Filing | Mar 16, 2015 | Dec 31, 2014 |
| 8-A12G | Form 8-a12g | Feb 3, 2015 | — |
| SD | Specialized disclosure (conflict minerals) | Jun 2, 2014 | — |
| NT 10-K | Filing | Mar 18, 2014 | Dec 31, 2013 |
| CT ORDER | Filing | Dec 4, 2013 | — |
| EFFECT | Filing | Jul 18, 2013 | — |
| EFFECT | Filing | Jul 18, 2013 | — |
| 8-K12G3 | Filing | Jul 1, 2013 | Jul 1, 2013 |
| EFFECT | Filing | Apr 23, 2013 | — |
| CORRESP | Letter to the SEC | Apr 19, 2013 | — |
| CORRESP | Letter to the SEC | Apr 15, 2013 | — |
| UPLOAD | Letter from the SEC | Apr 10, 2013 | — |
| 425 | Form 8-k | Mar 25, 2013 | — |
| RW | Form rw | May 22, 2012 | — |
| 425 | Form 8-k | Mar 19, 2012 | — |
| RW | Registration withdrawal | Apr 19, 2011 | — |
| 425 | Form 8-k | Mar 14, 2011 | — |
Showing 71 filings. 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.