Page 1

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K X ANNUALREPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 or TRANSITIONREPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 DELAWARE State or other jurisdiction of incorporation or organization 8310 South Valley Highway Suite 350 For the transition period from Englewood Colorado ( Address of principal executive offices ) Registrant's telephone number , including area code : ( 303 ) 792 5554 Securities registered pursuant to Section 12 ( b ) of the Securities Exchange Act of 1934 : Title of each class Common stock , par value $ 0.01 per share Securities registered pursuant to Section 12 ( g ) of the Act : to Commission file number 1-13879 INNOSPEC INC . ( Exact name of registrant as specified in its charter ) 98-0181725 ( I.R.S. Employer Identification No. ) Large accelerated filer Non - accelerated filer Emerging growth company 80112 ( Zip Code ) Title of each class N / A Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . X Trading Symbol ( s ) . IOSP □ ロ Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Name of each exchange on which registered NASDAQ Name of each exchange on which registered N / A Indicate check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( § 232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes > No Yes > No Indicate by check mark whether the registrant a large accelerated filer , an accelerated filer , a non - accelerated filer , or a smaller reporting company . See the definitions of " large accelerated filer , " " accelerated filer " and " smaller reporting company " in Rule 12b - 2 of the Exchange Act . Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . Yes Accelerated filer Smaller reporting company No X receding DOCUMENTS INCORPORATED BY REFERENCE Portions of Innospec Inc.'s Proxy Statement for the Annual Meeting of Stockholders to be held on May 5 , 2021 are incorporated by reference into Part III of this Form 10 - K . If an emerging growth company , indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial standards provided pursuant to Section 13 ( a ) of the Exchange Act . Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . | | | Yes No X The aggregate market value of the voting and non - voting common equity held by non - affiliates of the registrant as of the most recently completed second fiscal quarter ( June 30 , 2020 ) was approximately $ 1,061 million , based on the closing price of the common shares on the NASDAQ on June 30 , 2020. Shares of common stock held by each officer and director and by each beneficial owner who owns 5 % or more of the outstanding common stock have been excluded in that such persons may be deemed to be affiliates . This determination of affiliate status is not necessarily a conclusive determination for any other purpose . As of February 10 , 2021 , 24,598,689 shares of the registrant's common stock were outstanding .