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 |
|---|---|---|---|
| 10-Q | Quarterly report | Nov 4, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 3, 2026 | Nov 3, 2026 |
| 10-Q | Quarterly report | Aug 5, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2026 | Aug 4, 2026 |
| 8-K |
Current report
Officer or director change
|
Jun 4, 2026 | Jun 2, 2026 |
| SD | Specialized disclosure (conflict minerals) | May 29, 2026 | — |
| 8-K |
Current report
Shareholder vote results
|
May 13, 2026 | May 8, 2026 |
| 10-Q | Quarterly report | May 8, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 8, 2026 | May 7, 2026 |
| DEFA14A | Additional proxy material | Mar 26, 2026 | — |
| DEF 14A | Proxy statement | Mar 26, 2026 | May 8, 2026 |
| ARS | Annual report to shareholders | Mar 24, 2026 | Dec 31, 2025 |
| 10-K | Annual report | Feb 18, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Feb 18, 2026 | Feb 17, 2026 |
| 10-Q | Quarterly report | Nov 5, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 5, 2025 | Nov 4, 2025 |
| 10-Q | Quarterly report | Aug 6, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 6, 2025 | Aug 5, 2025 |
| SD | Specialized disclosure (conflict minerals) | May 30, 2025 | — |
| 8-K |
Current report
Shareholder vote results
|
May 14, 2025 | May 9, 2025 |
| 10-Q | Quarterly report | May 9, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 9, 2025 | May 8, 2025 |
| DEFA14A | Additional proxy material | Mar 27, 2025 | — |
| DEF 14A | Proxy statement | Mar 27, 2025 | May 9, 2025 |
| ARS | Annual report to shareholders | Mar 26, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 11, 2025 | Mar 10, 2025 |
| 10-K | Annual report | Feb 19, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 19, 2025 | Feb 18, 2025 |
| 10-Q | Quarterly report | Nov 6, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 6, 2024 | Nov 5, 2024 |
| 10-Q | Quarterly report | Aug 7, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 7, 2024 | Aug 6, 2024 |
| SD | Specialized disclosure (conflict minerals) | May 30, 2024 | — |
| 8-K |
Current report
Material agreement, New debt
|
May 21, 2024 | May 16, 2024 |
| 8-K |
Current report
Shareholder vote results
|
May 14, 2024 | May 10, 2024 |
| 10-Q | Quarterly report | May 10, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 10, 2024 | May 9, 2024 |
| 8-K |
Current report
Officer or director change
|
Apr 3, 2024 | Apr 3, 2024 |
| ARS | Annual report to shareholders | Mar 28, 2024 | Dec 31, 2023 |
| DEFA14A | Additional proxy material | Mar 28, 2024 | — |
| DEF 14A | Proxy statement | Mar 28, 2024 | May 10, 2024 |
| 10-K | Annual report | Feb 14, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Feb 14, 2024 | Feb 13, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 11, 2023 | Dec 8, 2023 |
| 10-Q | Quarterly report | Nov 8, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 8, 2023 | Nov 7, 2023 |
| 10-Q | Quarterly report | Aug 9, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 8, 2023 | Aug 8, 2023 |
| 8-K |
Current report
Material agreement, New debt
|
Jun 1, 2023 | May 31, 2023 |
| SD | Specialized disclosure (conflict minerals) | May 19, 2023 | — |
| 8-K |
Current report
Officer or director change
|
May 15, 2023 | May 11, 2023 |
| 8-K |
Current report
Shareholder vote results
|
May 8, 2023 | May 4, 2023 |
| 10-Q | Quarterly report | May 4, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 3, 2023 | May 3, 2023 |
| DEFA14A | Additional proxy material | Mar 22, 2023 | — |
| DEF 14A | Proxy statement | Mar 22, 2023 | — |
| ARS | Annual report to shareholders | Mar 16, 2023 | Dec 31, 2022 |
| 10-K | Annual report | Feb 22, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations
|
Feb 22, 2023 | Feb 22, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 14, 2022 | Dec 13, 2022 |
| 10-Q | Quarterly report | Nov 9, 2022 | Sep 30, 2022 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 9, 2022 | Nov 8, 2022 |
| 10-Q | Quarterly report | Aug 3, 2022 | Jun 30, 2022 |
| 8-K |
Current report
Results of operations
|
Aug 3, 2022 | Aug 2, 2022 |
| SD | Specialized disclosure (conflict minerals) | May 19, 2022 | — |
| 8-K |
Current report
Shareholder vote results
|
May 6, 2022 | May 4, 2022 |
| 10-Q | Quarterly report | May 4, 2022 | Mar 31, 2022 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 4, 2022 | May 3, 2022 |
| DEFA14A | Additional proxy material | Mar 18, 2022 | — |
| DEF 14A | Proxy statement | Mar 18, 2022 | May 4, 2022 |
| 10-K | Annual report | Feb 16, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations
|
Feb 16, 2022 | Feb 15, 2022 |
| 8-K |
Current report
Officer or director change
|
Dec 7, 2021 | Dec 2, 2021 |
| 10-Q | Quarterly report | Nov 3, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 3, 2021 | Nov 2, 2021 |
| 10-Q | Quarterly report | Aug 4, 2021 | Jun 30, 2021 |
| 8-K |
Current report
Results of operations
|
Aug 4, 2021 | Aug 3, 2021 |
| 8-K |
Current report
Shareholder vote results
|
May 6, 2021 | May 5, 2021 |
| 10-Q | Quarterly report | May 5, 2021 | Mar 31, 2021 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 5, 2021 | May 4, 2021 |
| SD | Specialized disclosure (conflict minerals) | Apr 30, 2021 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 20, 2021 | Apr 20, 2021 |
| DEFA14A | Additional proxy material | Mar 19, 2021 | — |
| DEF 14A | Proxy statement | Mar 19, 2021 | May 5, 2021 |
| 8-K |
Current report
Officer or director change
|
Feb 25, 2021 | Feb 23, 2021 |
| 10-K | Annual report | Feb 17, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Results of operations
|
Feb 17, 2021 | Feb 16, 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 | — |
| 8-K |
Current report
Officer or director change
|
Nov 6, 2020 | Nov 3, 2020 |
| 10-Q | Quarterly report | Nov 4, 2020 | Sep 30, 2020 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 4, 2020 | Nov 3, 2020 |
| 8-K |
Current report
Officer or director change, Other events
|
Nov 2, 2020 | Nov 1, 2020 |
| 8-K |
Current report
Material agreement, New debt
|
Oct 6, 2020 | Sep 16, 2020 |
| 10-Q | Quarterly report | Aug 5, 2020 | Jun 30, 2020 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2020 | Aug 4, 2020 |
| 8-K |
Current report
Shareholder vote results
|
May 11, 2020 | May 6, 2020 |
| 10-Q | Quarterly report | May 6, 2020 | Mar 31, 2020 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 6, 2020 | May 5, 2020 |
| DEFA14A | Additional proxy material | Apr 28, 2020 | — |
| SD | Specialized disclosure (conflict minerals) | Apr 27, 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 |
| 8-K |
Current report
Officer or director change
|
Mar 2, 2020 | Mar 1, 2020 |
| 8-K |
Current report
Officer or director change
|
Feb 20, 2020 | Feb 17, 2020 |
| 10-K | Annual report | Feb 19, 2020 | Dec 31, 2019 |
| 8-K |
Current report
Results of operations
|
Feb 18, 2020 | Feb 18, 2020 |
| 10-Q | Quarterly report | Nov 6, 2019 | Sep 30, 2019 |
| 8-K |
Current report
Results of operations
|
Nov 6, 2019 | Nov 5, 2019 |
| 8-K |
Current report
Material agreement, New debt
|
Sep 30, 2019 | Sep 26, 2019 |
| 10-Q | Quarterly report | Aug 6, 2019 | Jun 30, 2019 |
| 8-K |
Current report
Results of operations
|
Aug 6, 2019 | Aug 6, 2019 |
| 8-K |
Current report
Regulation FD disclosure
|
Jul 1, 2019 | Jul 1, 2019 |
| 8-K |
Current report
Officer or director change
|
Jun 3, 2019 | Jun 1, 2019 |
| SD | Specialized disclosure (conflict minerals) | May 28, 2019 | — |
| 8-K |
Current report
Auditor change
|
May 24, 2019 | May 24, 2019 |
| 8-K |
Current report
Shareholder vote results
|
May 13, 2019 | May 8, 2019 |
| 10-Q | Quarterly report | May 8, 2019 | Mar 31, 2019 |
| 8-K |
Current report
Results of operations
|
May 8, 2019 | May 7, 2019 |
| DEFA14A | Additional proxy material | Apr 11, 2019 | — |
| 8-K |
Current report
Auditor change
|
Apr 11, 2019 | Apr 5, 2019 |
| DEFA14A | Additional proxy material | Mar 22, 2019 | — |
| DEF 14A | Proxy statement | Mar 22, 2019 | May 8, 2019 |
| 10-K | Annual report | Feb 20, 2019 | Dec 31, 2018 |
| 8-K |
Current report
Results of operations
|
Feb 20, 2019 | Feb 19, 2019 |
| UPLOAD | Letter from the SEC | Nov 8, 2018 | — |
| 10-Q | Quarterly report | Nov 7, 2018 | Sep 30, 2018 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 7, 2018 | Nov 6, 2018 |
| CORRESP | Letter to the SEC | Nov 5, 2018 | — |
| UPLOAD | Letter from the SEC | Oct 30, 2018 | — |
| 10-Q | Quarterly report | Aug 8, 2018 | Jun 30, 2018 |
| 8-K |
Current report
Results of operations
|
Aug 7, 2018 | Aug 7, 2018 |
| S-8 | Employee stock plan registration | Jun 8, 2018 | — |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
May 10, 2018 | May 9, 2018 |
| 10-Q | Quarterly report | May 9, 2018 | Mar 31, 2018 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 9, 2018 | May 8, 2018 |
| DEFA14A | Additional proxy material | Apr 25, 2018 | — |
| 8-K |
Current report
Other events
|
Apr 25, 2018 | Apr 24, 2018 |
| DEFA14A | Additional proxy material | Mar 22, 2018 | — |
| DEF 14A | Proxy statement | Mar 22, 2018 | May 9, 2018 |
| 8-K |
Current report
Auditor change
|
Mar 15, 2018 | Mar 12, 2018 |
| 10-K | Annual report | Feb 15, 2018 | Dec 31, 2017 |
| 8-K |
Current report
Results of operations
|
Feb 14, 2018 | Feb 13, 2018 |
| 10-Q | Quarterly report | Nov 8, 2017 | Sep 30, 2017 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 8, 2017 | Nov 7, 2017 |
| 8-K/A |
Amended current report
Shareholder vote results
|
Sep 7, 2017 | May 10, 2017 |
| 10-Q | Quarterly report | Aug 9, 2017 | Jun 30, 2017 |
| 8-K |
Current report
Results of operations
|
Aug 9, 2017 | Aug 8, 2017 |
| 8-K |
Current report
Shareholder vote results
|
May 11, 2017 | May 10, 2017 |
| 10-Q | Quarterly report | May 10, 2017 | Mar 31, 2017 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 10, 2017 | May 9, 2017 |
| DEFA14A | Additional proxy material | Mar 17, 2017 | — |
| DEF 14A | Proxy statement | Mar 17, 2017 | May 10, 2017 |
| 10-K | Annual report | Feb 15, 2017 | Dec 31, 2016 |
| 8-K |
Current report
Results of operations
|
Feb 15, 2017 | Feb 14, 2017 |
| UPLOAD | Letter from the SEC | Jan 24, 2017 | — |
| CORRESP | Letter to the SEC | Jan 10, 2017 | — |
| 8-K |
Current report
Officer or director change
|
Jan 4, 2017 | Dec 30, 2016 |
| 8-K |
Current report
Material agreement, Acquisition or sale of assets, Regulation FD disclosure
|
Jan 3, 2017 | Jan 3, 2017 |
| UPLOAD | Letter from the SEC | Jan 3, 2017 | — |
| CORRESP | Letter to the SEC | Dec 22, 2016 | — |
| 8-K |
Current report
Material agreement, New debt
|
Dec 16, 2016 | Dec 14, 2016 |
| UPLOAD | Letter from the SEC | Dec 15, 2016 | — |
| 10-Q | Quarterly report | Nov 3, 2016 | Sep 30, 2016 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 3, 2016 | Nov 2, 2016 |
| 8-K |
Current report
Material agreement
|
Oct 27, 2016 | Oct 27, 2016 |
| 8-K |
Current report
Material agreement, Other events
|
Aug 3, 2016 | Jul 29, 2016 |
| 10-Q | Quarterly report | Aug 3, 2016 | Jun 30, 2016 |
| 8-K |
Current report
Results of operations
|
Aug 3, 2016 | Aug 2, 2016 |
| SD | Specialized disclosure (conflict minerals) | May 23, 2016 | — |
| 8-K |
Current report
Regulation FD disclosure
|
May 13, 2016 | May 13, 2016 |
| 8-K |
Current report
Shareholder vote results
|
May 5, 2016 | May 4, 2016 |
| 10-Q | Quarterly report | May 4, 2016 | Mar 31, 2016 |
| 8-K |
Current report
Results of operations
|
May 4, 2016 | May 3, 2016 |
| DEFA14A | Additional proxy material | Mar 18, 2016 | — |
| DEF 14A | Proxy statement | Mar 18, 2016 | May 4, 2016 |
| 8-K |
Current report
Officer or director change
|
Mar 3, 2016 | Feb 29, 2016 |
| UPLOAD | Letter from the SEC | Feb 22, 2016 | — |
| 10-K | Annual report | Feb 17, 2016 | Dec 31, 2015 |
| CORRESP | Letter to the SEC | Feb 17, 2016 | — |
| 8-K |
Current report
Results of operations
|
Feb 17, 2016 | Feb 16, 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 | — |
| 8-K |
Current report
Officer or director change
|
Dec 23, 2015 | Dec 23, 2015 |
| 8-K |
Current report
Officer or director change
|
Dec 21, 2015 | Dec 18, 2015 |
| UPLOAD | Letter from the SEC | Dec 21, 2015 | — |
| 8-K |
Current report
Bylaw or fiscal year change
|
Nov 13, 2015 | Nov 10, 2015 |
| 8-K |
Current report
Officer or director change
|
Nov 10, 2015 | Nov 5, 2015 |
| 8-K |
Current report
Material agreement, New debt
|
Nov 9, 2015 | Nov 6, 2015 |
| 10-Q | Quarterly report | Nov 4, 2015 | Sep 30, 2015 |
| 8-K |
Current report
Results of operations
|
Nov 4, 2015 | Nov 3, 2015 |
| 8-K/A |
Amended current report
Officer or director change
|
Oct 16, 2015 | Oct 9, 2015 |
| 8-K |
Current report
Officer or director change
|
Oct 16, 2015 | Oct 9, 2015 |
| 8-K |
Current report
Officer or director change
|
Sep 11, 2015 | Sep 5, 2015 |
| 10-Q | Quarterly report | Aug 5, 2015 | Jun 30, 2015 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2015 | Aug 4, 2015 |
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
- 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.