Ian Malcolm McRobbie - 23 Feb 2026 Form 4 Insider Report for INNOSPEC INC. (IOSP)

Role: Senior VP R&T
Signature: Ian Malcolm McRobbie
Issuer symbol: IOSP
Transactions as of: 23 Feb 2026
Net transactions value: $0
Form type: 4
Filing time: 25 Feb 2026, 17:36:07 UTC
Previous filing: 27 Feb 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
MCROBBIE IAN MALCOLM	Senior VP R&T	8310 SOUTH VALLEY HIGHWAY, SUITE 350, ENGLEWOOD	Ian Malcolm McRobbie	25 Feb 2026	0001233480

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	IOSP	Phantom Stock	Award	$0	+2,228		$0.000000	2,228	23 Feb 2026	Common Stock	2,228		Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each share of phantom stock is the economic equivalent of one share of Innospec common stock. The award is scheduled to automatically settle in cash on the Expiration Date based on the closing price of Innospec common stock on that date.