    <SEC-DOCUMENT>0001193125-18-091331-index.html : 20180322
    <SEC-HEADER>0001193125-18-091331.hdr.sgml : 20180322
    <ACCEPTANCE-DATETIME>20180322071033
    ACCESSION NUMBER:		0001193125-18-091331
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		3
    FILED AS OF DATE:		20180322
    DATE AS OF CHANGE:		20180322
    EFFECTIVENESS DATE:		20180322

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			INNOSPEC INC.
    		CENTRAL INDEX KEY:			0001054905
    		STANDARD INDUSTRIAL CLASSIFICATION:	CHEMICALS & ALLIED PRODUCTS [2800]
    		IRS NUMBER:				981081725
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-13879
    		FILM NUMBER:		18705690

    	BUSINESS ADDRESS:
    		STREET 1:		8310 SOUTH VALLEY HIGHWAY
    		STREET 2:		SUITE 350
    		CITY:			ENGLEWOOD
    		STATE:			CO
    		ZIP:			80112
    		BUSINESS PHONE:		303-566-0528

    	MAIL ADDRESS:
    		STREET 1:		8310 SOUTH VALLEY HIGHWAY
    		STREET 2:		SUITE 350
    		CITY:			ENGLEWOOD
    		STATE:			CO
    		ZIP:			80112

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	OCTEL CORP
    		DATE OF NAME CHANGE:	19980209
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>d518116ddefa14a.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: d518116ddefa14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>g518116img1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: g518116img1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>g518116img2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g518116img2.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>