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R REPLIGEN NEWS RELEASE Repligen Reports First Quarter 2021 Financial Results and Updates Full Year 2021 Financial Guidance 2021-05-04 • Reported revenue was $ 142.8 million for the quarter , representing year - over - year growth of 88 % and organic growth of 69 % • Growth driven by combination of COVID - related demand , base business strength and acquisition revenue WALTHAM , Mass . , May 04 , 2021 ( GLOBE NEWSWIRE ) -- Repligen Corporation ( NASDAQ : RGEN ) , a life sciences company focused on bioprocessing technology leadership , today reported financial results for its first quarter ended March 31 , 2021. Provided in this press release are financial highlights for the quarter , updates to our financial guidance for the year 2021 , and access information for today's webcast and conference call . Tony J. Hunt , President and Chief Executive Officer said , " I am extremely proud of the way our team executed here in the first quarter . With unprecedented demand driven by strong COVID tailwinds , our whole team pivoted to deliver an impressive quarter with 88 % growth and 69 % organic . COVID revenue contribution ticked up to 25 % of revenues in the first quarter and equally impressive was the performance of our non - COVID base business which was up 31 % year - on - year . This is an endorsement of the differentiation we have in the marketplace with our technologies and the focus and execution of our global team . With accelerating orders , new product launches , planned new capacity and impressive growth across all four franchises , we are confident about the full year outlook for the Company and are updating our financial guidance to reflect our expectations for operating margin expansion and for organic revenue growth in the range of 42 % -49 % . " First Quarter 2021 Highlights • Revenue increased by 88 % year - over - year as reported and 69 % organically , to $ 142.8 million 1