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 |
|---|---|---|---|
| DEFA14A | Additional proxy material | Mar 26, 2026 | — |
| DEF 14A | Proxy statement | Mar 26, 2026 | May 8, 2026 |
| DEFA14A | Additional proxy material | Mar 27, 2025 | — |
| DEF 14A | Proxy statement | Mar 27, 2025 | May 9, 2025 |
| DEFA14A | Additional proxy material | Mar 28, 2024 | — |
| DEF 14A | Proxy statement | Mar 28, 2024 | May 10, 2024 |
| DEFA14A | Additional proxy material | Mar 22, 2023 | — |
| DEF 14A | Proxy statement | Mar 22, 2023 | — |
| DEFA14A | Additional proxy material | Mar 18, 2022 | — |
| DEF 14A | Proxy statement | Mar 18, 2022 | May 4, 2022 |
| DEFA14A | Additional proxy material | Mar 19, 2021 | — |
| DEF 14A | Proxy statement | Mar 19, 2021 | May 5, 2021 |
| DEFA14A | Additional proxy material | Apr 28, 2020 | — |
| DEFA14A | Additional proxy material | Apr 9, 2020 | — |
| DEFA14A | Additional proxy material | Mar 26, 2020 | — |
| DEFA14A | Additional proxy material | Mar 20, 2020 | — |
| DEF 14A | Proxy statement | Mar 20, 2020 | May 6, 2020 |
| DEFA14A | Additional proxy material | Apr 11, 2019 | — |
| DEFA14A | Additional proxy material | Mar 22, 2019 | — |
| DEF 14A | Proxy statement | Mar 22, 2019 | May 8, 2019 |
| DEFA14A | Additional proxy material | Apr 25, 2018 | — |
| DEFA14A | Additional proxy material | Mar 22, 2018 | — |
| DEF 14A | Proxy statement | Mar 22, 2018 | May 9, 2018 |
| DEFA14A | Additional proxy material | Mar 17, 2017 | — |
| DEF 14A | Proxy statement | Mar 17, 2017 | May 10, 2017 |
| DEFA14A | Additional proxy material | Mar 18, 2016 | — |
| DEF 14A | Proxy statement | Mar 18, 2016 | May 4, 2016 |
| DEFA14A | Additional proxy material | Mar 20, 2015 | — |
| DEF 14A | Proxy statement | Mar 20, 2015 | May 6, 2015 |
| DEFA14A | Additional proxy material | Mar 21, 2014 | — |
| DEF 14A | Proxy statement | Mar 21, 2014 | May 7, 2014 |
| DEFA14A | Additional proxy material | Mar 27, 2013 | — |
| DEF 14A | Proxy statement | Mar 22, 2013 | May 8, 2013 |
| DEF 14A | Proxy statement | Mar 23, 2012 | May 9, 2012 |
| DEFA14A | Additional proxy material | Apr 7, 2011 | — |
| DEF 14A | Proxy statement | Apr 1, 2011 | May 11, 2011 |
Showing 36 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.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
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.