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ACM Research Set to Join S&P SmallCap 600

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ACM Research (NASDAQ: ACMR) will be added to the S&P SmallCap 600 index effective prior to market opening on September 26, 2025. The addition comes as WK Kellogg (NYSE: KLG) is being removed from the index due to its pending acquisition by The Ferrero Group.

ACMR will join the index under the Information Technology sector, replacing KLG which was previously listed under Consumer Staples. The change will be implemented once the Ferrero Group's acquisition of WK Kellogg closes, subject to final conditions.

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Positive

  • Inclusion in S&P SmallCap 600 index can increase visibility and trading volume
  • Addition to the index typically leads to increased institutional ownership
  • Potential for enhanced market liquidity due to index fund purchases

Negative

  • None.

News Market Reaction 25 Alerts

+2.20% News Effect
+3.5% Peak in 19 hr 55 min
+$55M Valuation Impact
$2.54B Market Cap
1.5x Rel. Volume

On the day this news was published, ACMR gained 2.20%, reflecting a moderate positive market reaction. Argus tracked a peak move of +3.5% during that session. Our momentum scanner triggered 25 alerts that day, indicating elevated trading interest and price volatility. This price movement added approximately $55M to the company's valuation, bringing the market cap to $2.54B at that time. Trading volume was above average at 1.5x the daily average, suggesting increased trading activity.

Data tracked by StockTitan Argus on the day of publication.

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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Cision View original content:https://www.prnewswire.com/news-releases/acm-research-set-to-join-sp-smallcap-600-302563572.html

SOURCE S&P Dow Jones Indices

FAQ

When will ACM Research (ACMR) join the S&P SmallCap 600 index?

ACM Research will join the S&P SmallCap 600 index prior to the opening of trading on September 26, 2025.

Why is ACM Research (ACMR) being added to the S&P SmallCap 600?

ACMR is being added to replace WK Kellogg (KLG), which is being removed due to its pending acquisition by The Ferrero Group.

What sector will ACM Research (ACMR) represent in the S&P SmallCap 600?

ACM Research will be classified under the Information Technology sector in the S&P SmallCap 600 index.

What are the benefits for ACM Research (ACMR) joining the S&P SmallCap 600?

Joining the S&P SmallCap 600 typically provides benefits such as increased visibility, higher trading volume, and greater institutional ownership due to index fund investments.
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