Innospec Inc. SEC filings IOSP
Innospec Inc. has 1,009 filings in SEC EDGAR's recent list, going back to Feb 28, 2011. Its latest annual report, Form ARS, was filed on Mar 24, 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 3, 2026 (results of operations, regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SD | Specialized disclosure (conflict minerals) | May 29, 2026 | — |
| SD | Specialized disclosure (conflict minerals) | May 30, 2025 | — |
| SD | Specialized disclosure (conflict minerals) | May 30, 2024 | — |
| SD | Specialized disclosure (conflict minerals) | May 19, 2023 | — |
| SD | Specialized disclosure (conflict minerals) | May 19, 2022 | — |
| SD | Specialized disclosure (conflict minerals) | Apr 30, 2021 | — |
| UPLOAD | Letter from the SEC | Jan 4, 2021 | — |
| CORRESP | Letter to the SEC | Dec 22, 2020 | — |
| UPLOAD | Letter from the SEC | Dec 16, 2020 | — |
| SD | Specialized disclosure (conflict minerals) | Apr 27, 2020 | — |
| SD | Specialized disclosure (conflict minerals) | May 28, 2019 | — |
| UPLOAD | Letter from the SEC | Nov 8, 2018 | — |
| CORRESP | Letter to the SEC | Nov 5, 2018 | — |
| UPLOAD | Letter from the SEC | Oct 30, 2018 | — |
| UPLOAD | Letter from the SEC | Jan 24, 2017 | — |
| CORRESP | Letter to the SEC | Jan 10, 2017 | — |
| UPLOAD | Letter from the SEC | Jan 3, 2017 | — |
| CORRESP | Letter to the SEC | Dec 22, 2016 | — |
| UPLOAD | Letter from the SEC | Dec 15, 2016 | — |
| SD | Specialized disclosure (conflict minerals) | May 23, 2016 | — |
| UPLOAD | Letter from the SEC | Feb 22, 2016 | — |
| CORRESP | Letter to the SEC | Feb 17, 2016 | — |
| UPLOAD | Letter from the SEC | Feb 2, 2016 | — |
| CORRESP | Letter to the SEC | Jan 19, 2016 | — |
| CORRESP | Letter to the SEC | Jan 6, 2016 | — |
| UPLOAD | Letter from the SEC | Dec 21, 2015 | — |
| SD | Specialized disclosure (conflict minerals) | Jun 1, 2015 | — |
| UPLOAD | Letter from the SEC | Dec 20, 2013 | — |
| CORRESP | Letter to the SEC | Dec 19, 2013 | — |
| UPLOAD | Letter from the SEC | Dec 10, 2013 | — |
| UPLOAD | Letter from the SEC | Mar 8, 2013 | — |
| CORRESP | Letter to the SEC | Feb 26, 2013 | — |
| CORRESP | Letter to the SEC | Feb 6, 2013 | — |
| UPLOAD | Letter from the SEC | Feb 1, 2013 | — |
| CORRESP | Letter to the SEC | Jan 17, 2013 | — |
| CORRESP | Letter to the SEC | Jan 2, 2013 | — |
| UPLOAD | Letter from the SEC | Dec 27, 2012 | — |
| 15-12B | Deregistration | Mar 1, 2012 | — |
| UPLOAD | Letter from the SEC | Aug 8, 2011 | — |
| CORRESP | Letter to the SEC | Aug 2, 2011 | — |
| CORRESP | Letter to the SEC | Jul 28, 2011 | — |
| UPLOAD | Letter from the SEC | Jul 19, 2011 | — |
| CORRESP | Letter to the SEC | Jun 22, 2011 | — |
| UPLOAD | Letter from the SEC | Jun 9, 2011 | — |
Showing 44 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
- Chemicals & Allied Products (SIC 2800)
- Listed as
- IOSP (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Englewood, CO
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1054905
- Former names
- OCTEL CORP (until Jan 9, 2006)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.