ACM Research Set to Join S&P SmallCap 600

Delist Pre

+14.87% Pre

-2.75% Pre

WK Kellogg Co Common Stock

KLG

23.00

Delist

0.00% Pre

ACM Research, Inc. Class A

ACMR

62.48

62.50

+14.87%

+0.03% Pre

S&P Global, Inc.

SPGI

439.28

443.95

-2.75%

+1.06% Pre

NEW YORK, Sept. 22, 2025 /PRNewswire/ -- ACM Research Inc. (NASD: ACMR) will replace WK Kellogg Co. (NYSE: KLG) in the S&P SmallCap 600 effective prior to the opening of trading on Friday, September 26. The Ferrero Group is acquiring WK Kellogg in a deal expected to close 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	Action		Company Name	Ticker	GICS Sector
Sept 26, 2025	S&P SmallCap 600		Addition	ACM Research	ACMR	Information Technology
Sept 26, 2025	S&P SmallCap 600		Deletion	WK Kellogg	KLG	Consumer Staples

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