Corbin Barnes - 01 Oct 2026 Form 4 Insider Report for INNOSPEC INC. (IOSP)

Reporting relationship: SVP, Corporate Dev and IR
Issuer ticker: IOSP
Reported as of: 01 Oct 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 05 Oct 2026, 20:09:17 UTC
Prior SEC filing: 03 Mar 2026
Source filing: View source filing
Reporting owner signature: Corbin Barnes

Key filing fact

Corbin Barnes filed Form 4 for INNOSPEC INC. (IOSP) on 05 Oct 2026.

Key facts

This page summarizes Corbin Barnes's Form 4 filing for INNOSPEC INC. (IOSP).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 05 Oct 2026, 20:09.

Change

Previous filing in this sequence was filed on 03 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001861656 Primary reporting owner

BARNES CORBIN

Relationship: SVP, Corporate Dev and IR
Address: 8310 SOUTH VALLEY HIGHWAY, SUITE 350, ENGLEWOOD
Signature: Corbin Barnes
Signature date: 05 Oct 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

IOSP transaction Derivative

Phantom Stock

Award

Transaction value
Shares: +2,642
Change %
Price: $0.000000^*
Shares after: 2,642
Date: 01 Oct 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 2,642
Exercise price
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Each share of phantom stock is the economic equivalent of one share of IOSP common stock.

Footnote F2

Award will vest according to the following schedule (each such date, a "Vesting Date"), subject to reporting persons continued employment and satisfactory performance: 25% on February 1, 2027; 25% on October 1, 2027; and 50% on October 1, 2028.