NEW YORK, Oct. 13, 2022 /PRNewswire/ -- Westlake Corp. (NYSE:WLK) will replace MillerKnoll Inc. (NASD:MLKN) in the S&P MidCap 400, and MillerKnoll will replace Covetrus Inc. (NASD:CVET) in the S&P SmallCap 600 effective prior to the opening of trading on Tuesday, October 18. Clayton, Dubilier & Rice and TPG Capital acquired Covetrus in a deal that closed today. MillerKnoll is more representative of the small-cap market space.

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	Action	Company Name	Ticker	GICS Sector
October 18, 2022	S&P MidCap 400	Addition	Westlake	WLK	Materials
	S&P MidCap 400	Deletion	MillerKnoll	MLKN	Industrials
	S&P SmallCap 600	Addition	MillerKnoll	MLKN	Industrials
	S&P SmallCap 600	Deletion	Covetrus	CVET	Health Care

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SOURCE S&P Dow Jones Indices

Westlake Set to Join S&P MidCap 400; MillerKnoll to Join S&P SmallCap 600

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