Statement of Changes in Beneficial Ownership (4)

FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person * Cleminson Ian	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) VP & CFO
(Last)          (First)          (Middle) 8310 SOUTH VALLEY HIGHWAY, SUITE 350	3. Date of Earliest Transaction (MM/DD/YYYY) 2/24/2023
(Street) ENGLEWOOD, CO 80112 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	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. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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	3/6/2023		M		406	A	$0.00	21674	D
Common Stock	3/6/2023		S		406	D	$106.0706	21268	D
Common Stock	3/6/2023		M		450	A	$0.00	21718	D
Common Stock	3/6/2023		S		450	D	$106.0706	21268	D
Common Stock	3/6/2023		M		5223	A	$0.00	26491	D
Common Stock	3/6/2023		S		1534	D	$104.098 (1)	24957	D
Common Stock	3/6/2023		S		2787	D	$105.2304 (2)	22170	D
Common Stock	3/6/2023		S		902	D	$106.3843 (3)	21268	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		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 of Derivative Security: 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
Employee Stock Option	$95.70	2/24/2023		M		406 (4)		2/24/2023	2/24/2030	Common Stock	406	$0.00	0	D
Employee Stock Option	$95.70	2/24/2023		M			406	2/24/2023	2/24/2030	Common Stock	406	$0.00	0	D
Employee Stock Option	$95.70	2/24/2023		M		450 (4)		2/24/2023	2/24/2030	Common Stock	450	$0.00	0	D
Employee Stock Option	$95.70	2/24/2023		M			450	2/24/2023	2/24/2030	Common Stock	450	$0.00	0	D
Employee Stock Option	$0.00	3/6/2023		M			5223	2/20/2023	2/20/2028	Common Stock	5523	$0.00	0	D

Explanation of Responses:
(1)	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions in prices ranging from $108.67 to $109.66, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (2) and (3) to this Form 4.
(2)	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions in prices ranging from $109.67 to $110.66, inclusive.
(3)	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions in prices ranging from $110.77 to $111.12, inclusive.
(4)	Represents the total number of shares underlying an Option that vested upon certification of the achievement of the performance goals for the Option that was originally granted to the Reporting Person on February 24, 2020.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Cleminson Ian 8310 SOUTH VALLEY HIGHWAY SUITE 350 ENGLEWOOD, CO 80112			VP & CFO

Signatures
Ian Philip Cleminson		3/9/2023
**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).
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