Innospec (IOSP) CFO Ian Cleminson sells 2,380 shares in open market

Rhea-AI Filing Summary

Innospec Inc. executive vice president and CFO Ian Cleminson reported an open-market sale of 2,380 shares of common stock at a price of $76.56 per share. After this transaction, he directly holds 20,357 shares of Innospec common stock.

Insider Trade Summary

Net Seller: 2,380 shares ($182,213)

Net Sell 1 txn

Insider Cleminson Ian

Role EVP & CFO

Sold 2,380 shs ($182K)

Type	Security	Shares	Price	Value
Sale	Common Stock	2,380	$76.56	$182K

Holdings After Transaction: Common Stock — 20,357 shares (Direct)

Footnotes (1)

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Cleminson Ian

(Last) (First) (Middle)

8310 SOUTH VALLEY HIGHWAY

SUITE 350

(Street)

ENGLEWOOD CO 80112

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
INNOSPEC INC. [ IOSP ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP & CFO

3. Date of Earliest Transaction (Month/Day/Year)
02/27/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/27/2026		S		2,380	D	$76.56	20,357	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	Ian Philip Cleminson	03/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did Innospec (IOSP) report for Ian Cleminson?

Innospec reported that EVP and CFO Ian Cleminson sold 2,380 shares of common stock in an open-market transaction. The sale was reported on a Form 4 insider filing and involved non-derivative common stock at a specified transaction price per share.

How many Innospec (IOSP) shares did Ian Cleminson sell and at what price?

Ian Cleminson sold 2,380 shares of Innospec common stock at a price of $76.56 per share. This was reported as an open-market sale under transaction code “S,” indicating a sale in the market or a private transaction.

How many Innospec (IOSP) shares does Ian Cleminson own after this sale?

After the reported sale, Ian Cleminson directly owns 20,357 shares of Innospec common stock. This post-transaction holding reflects his remaining direct ownership following the 2,380-share open-market sale disclosed in the Form 4 filing.

What type of security was involved in the latest Innospec (IOSP) insider trade?

The transaction involved Innospec common stock classified as a non-derivative security. Ian Cleminson executed an open-market sale of 2,380 common shares, as documented in the insider Form 4 report for the specified transaction date.

What does transaction code “S” mean in the Innospec (IOSP) Form 4 filing?

Transaction code “S” in the Innospec filing denotes a sale in the open market or a private transaction. In this case, it identifies Ian Cleminson’s 2,380-share disposition as an open-market sale of common stock at a defined per-share price.