Ownership Submission
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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(Print or Type Responses)
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  

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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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