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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 Form 10 - K ( Mark One ) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER : 0-19271 Delaware ( State or other jurisdiction of incorporation or organization ) One IDEXX Drive ( Address of principal executive offices ) Title of each class Common Stock , $ 0.10 par value per share IDEXX IDEXX LABORATORIES , INC . ( Exact name of registrant as specified in its charter ) Westbrook , Maine Large accelerated filer Non - accelerated filer 207-556-0300 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) . IDXX 01-0393723 ( IRS Employer Identification No. ) 04092 ( ZIP Code ) Name of each exchange on which registered NASDAQ Global Select Market Securities registered pursuant to Section 12 ( g ) of the Act : None Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes > No Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes No Indicate by 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 preceding 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 Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , or an emerging growth company . See the definitions of " large accelerated filer , " " accelerated filer , " " smaller reporting company , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Accelerated filer Smaller reporting company Emerging growth company 000 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 accounting 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 . Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . Yes No Based on the closing sale price on June 30 , 2020 of the registrant's Common Stock , the last business day of the registrant's most recently completed second fiscal quarter , as reported by the NASDAQ Global Select Market , the aggregate market value of the voting stock held by non - affiliates of the registrant was $ 27,735,989,165 . For these purposes , the registrant considers its directors and executive officers to be its only affiliates . The number of shares outstanding of the registrant's Common Stock was 85,426,080 on February 9 , 2021 . DOCUMENTS INCORPORATED BY REFERENCE Part III Specifically identified portions of the Company's definitive Proxy Statement to be filed in connection with the Company's 2021 annual meeting of stockholders ( the " 2021 Annual Meeting " ) , to be held on May 12 , 2021 , are incorporated herein by reference .