Page 1

Press Release Investor Contact : Lindsey Opsahl SEI +1 610-676-4052 lopsahl@seic.com 8 Media Contact : Leslie Wojcik SEI +1 610-676-4191 Iwojcik@seic.com Pages : FOR IMMEDIATE RELEASE SEI New ways . New answers . SEI Reports Third - Quarter 2021 Financial Results OAKS , Pa . , Oct. 20 , 2021 - SEI Investments Company ( NASDAQ : SEIC ) today announced financial results for the third - quarter 2021. Diluted earnings per share were $ 0.97 in third - quarter 2021 compared to $ 0.75 in third - quarter 2020 . Consolidated Overview ( In thousands , except earnings per share ) Revenues Net income Diluted earnings per share For the Three Months Ended September 30 , For the Nine Months Ended September 30 , 2021 2020 % 2021 2020 % $ 485,322 138,045 $ 0.97 $ 424,927 14 % 111,096 24 % $ 0.75 29 % $ 1,416,659 401,293 $ 2.79 $ 1,240,335 14 % 321,404 25 % $ 2.14 30 % " Our results reflect positive markets entering the third - quarter , continued sales momentum and delivery across our business segments . As the financial services industry continues to experience unrelenting change , we continue to make strategic investments in our business , our solutions and workforce to drive growth , " said Alfred P. West , Jr. , SEI Chairman and CEO . " Our talented workforce is the key to our ability to serve our clients globally and create opportunities for our future . As we look forward , we will continue to capitalize on market opportunities to deliver long- term value to our shareholders , employees , clients and communities . ”