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 Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * HESSNER CATHERINE   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) Senior VP - Human Resources (Last) (First) (Middle) 8375 SOUTH WILLOW STREET 3. Date of Earliest Transaction (Month/Day/Year) 05/10/2013 (Street) LITTLETON, CO 80124 4. If Amendment, Date 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 (City) (State) (Zip) 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 05/09/2013   M   2 A $ 27.085 33,239 (1) D   Common Stock 05/09/2013   S   2 D $ 40.6941 33,237 (2) D   Common Stock 05/09/2013   M   1,272 A $ 27.085 34,509 (3) D   Common Stock 05/09/2013   F   675 (4) D $ 42.2433 33,834 (5) D   Common Stock 05/09/2013   S   597 D $ 40.6941 33,237 (6) D   Common Stock 05/09/2013   M   1,949 A $ 10.38 35,186 (7) D   Common Stock 05/09/2013   F   1,035 (8) D $ 42.2433 34,151 (9) D   Common Stock 05/09/2013   S   914 D $ 40.6941 33,237 (10) D   Common Stock 05/09/2013   M   8,026 A $ 0 41,263 (11) D   Common Stock 05/09/2013   F   4,262 (12) D $ 42.2433 37,001 (13) D   Common Stock 05/09/2013   S   3,764 D $ 40.6941 33,237 (14) D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 Underlying Securities (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

Stock Options

$ 27.085

05/09/2013

M

2

02/21/2010

02/21/2017

Common Stock

2

$ 27.085

20,830 (15)

D

Stock Options

$ 27.085

05/09/2013

M

1,272

02/21/2010

02/21/2017

Common Stock

1,272

$ 27.085

19,558 (16)

D

Stock Options

$ 10.38

05/09/2013

M

1,949

03/17/2013

03/17/2020

Common Stock

1,949

$ 10.38

17,609 (17)

D

Stock Options

$ 0

05/09/2013

M

8,026

03/17/2013

03/17/2020

Common Stock

8,026

$ 10.38

9,583 (18)

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
HESSNER CATHERINE 8375 SOUTH WILLOW STREET LITTLETON, CO 80124			Senior VP - Human Resources

Signatures

Nicola Earl		05/10/2013
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Total includes options from other tranches with different exercise prices, vesting dates and expiration dates.
(2)	Total includes options from other tranches with different exercise prices, vesting dates and expiration dates.
(3)	Total includes options from other tranches with different exercise prices, vesting dates and expiration dates.
(4)	Shares of Common Stock withheld to pay tax liability and acquisition price
(5)	Total includes options from other tranches with different exercise prices, vesting dates and expiration dates.
(6)	Total includes options from other tranches with different exercise prices, vesting dates and expiration dates.
(7)	Total includes options from other tranches with different exercise prices, vesting dates and expiration dates.
(8)	Shares of Common Stock withheld to pay tax liability and acquisition price.
(9)	Total includes options from other tranches with different exercise prices, vesting dates and expiration dates.
(10)	Total includes options from other tranches with different exercise prices, vesting dates and expiration dates.
(11)	Total includes options from other tranches with different exercise prices, vesting dates and expiration dates.
(12)	Shares of Common Stock withheld to pay tax liability.
(13)	Total includes options from other tranches with different exercise prices, vesting dates and expiration dates.
(14)	Total includes options from other tranches with different exercise prices, vesting dates and expiration dates.
(15)	Total includes options from other tranches with different exercise prices, vesting dates and expiration dates.
(16)	Total includes options from other tranches with different exercise prices, vesting dates and expiration dates.
(17)	Total includes options from other tranches with different exercise prices, vesting dates and expiration dates.
(18)	Total includes options from other tranches with different exercise prices, vesting dates and expiration dates.

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