Repligen(RGEN) - 2018 Q4 - Annual Report

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 Commission File Number 000-14656 REPLIGEN CORPORATION (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorporation or organization) 41 Seyon Street, Bldg. 1, Suite 100 Waltham, MA 02453 (Address of principal executive offices) (Zip Code) OR ...