Patrick Williams - 01 Oct 2026 Form 4 Insider Report for INNOSPEC INC. (IOSP)

Reporting relationship: PRESIDENT & CEO
Issuer ticker: IOSP
Reported as of: 01 Oct 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 05 Oct 2026, 19:30:35 UTC
Prior SEC filing: 01 Jul 2026
Next SEC filing: 08 Oct 2026
Source filing: View source filing
Reporting owner signature: Patrick Williams

Key filing fact

Patrick Williams filed Form 4 for INNOSPEC INC. (IOSP) on 05 Oct 2026.

Key facts

This page summarizes Patrick Williams's Form 4 filing for INNOSPEC INC. (IOSP).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 05 Oct 2026, 19:30.

Change

Previous filing in this sequence was filed on 01 Jul 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 0001338883 Primary reporting owner

Williams Patrick

Relationship: PRESIDENT & CEO
Address: 8310 SOUTH VALLEY HIGHWAY, SUITE 350, ENGLEWOOD
Signature: Patrick Williams
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: +22,203
Change %
Price: $0.000000^*
Shares after: 22,203
Date: 01 Oct 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 22,203
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.