NEW YORK, April 25, 2023 /PRNewswire/ -- Cytek Biosciences Inc (NASD:CTKB) will replace Cardiovascular Systems Inc. (NASD:CSII) in the S&P SmallCap 600 effective prior to the opening of trading on Monday, May 1. S&P 500 and 100 constituent Abbott Laboratories (NYSE:ABT) is acquiring Cardiovascular Systems in a deal expected to be completed soon, pending final closing conditions.

Following is a summary of the changes that will take place prior to the open of trading on the effective date:

Effective Date

Index Name      


Company Name


GICS Sector

May 1, 2023

S&P SmallCap 600


Cytek Biosciences


Health Care

S&P SmallCap 600


Cardiovascular Systems


Health Care

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