# EDGAR Filing Document

**Accession Number:** 0001054905
**File Stem:** 0001193125-26-120767
**Filing Date:** 2026-3
**Character Count:** 1296
**Document Hash:** a37ac18ba38aefd4edeaf88b77516d2e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-120767.hdr.sgml**: 20260324

**ACCESSION NUMBER**: 0001193125-26-120767

**CONFORMED SUBMISSION TYPE**: ARS

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260324

**DATE AS OF CHANGE**: 20260324

**EFFECTIVENESS DATE**: 20260324

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** INNOSPEC INC.
- **CENTRAL INDEX KEY:** 0001054905
- **STANDARD INDUSTRIAL CLASSIFICATION:** CHEMICALS & ALLIED PRODUCTS [2800]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 981081725
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** ARS
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-13879
- **FILM NUMBER:** 26784217

**BUSINESS ADDRESS:**
- **STREET 1:** 8310 SOUTH VALLEY HIGHWAY
- **STREET 2:** SUITE 350
- **CITY:** ENGLEWOOD
- **STATE:** CO
- **ZIP:** 80112
- **BUSINESS PHONE:** 7203556451

**MAIL ADDRESS:**
- **STREET 1:** 8310 SOUTH VALLEY HIGHWAY
- **STREET 2:** SUITE 350
- **CITY:** ENGLEWOOD
- **STATE:** CO
- **ZIP:** 80112

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** OCTEL CORP
- **DATE OF NAME CHANGE:** 19980209

### Attached PDF Documents

**Attachment 1:** `ars_10k_2025.pdf`

_No text found in this document._