1. GMS will be replaced by Mirion Technologies in the S&P SmallCap 600. 2. Home Depot acquired GMS in a deal completed on September 4, 2025. 3. Effective change occurs before market opening on September 9, 2025. 4. The index change indicates a significant shift for GMS's market presence.
Removal from the S&P SmallCap 600 typically leads to declining investor interest and stock price. Historical cases, such as companies removed from major indices, show often severe stock price drops post-deletion.
The acquisition of GMS by Home Depot signifies a major corporate transition, likely impacting stock valuation significantly.
Immediate market reactions are expected due to the index change; historical removals often see prompt price declines.
NEW YORK, Sept. 4, 2025 /PRNewswire/ -- Mirion Technologies Inc. (NYSE:MIR) will replace GMS Inc. (NYSE:GMS) in the S&P SmallCap 600 effective prior to the opening of trading on Tuesday, September 9. S&P 500 and 100 constituent Home Depot Inc. (NYSE:HD) acquired GMS in a deal that was completed today.
Following is a summary of the change that will take place prior to the open of trading on the effective date:
Effective Date | Index Name | Action | Company Name | Ticker | GICS Sector |
September 9, 2025 | S&P SmallCap 600 | Addition | Mirion Technologies | MIR | Information Technology |
September 9, 2025 | S&P SmallCap 600 | Deletion | GMS | GMS | Industrials |
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