Sandisk Set to Join S&P 500; Upwork, First Interstate BancSystem, PTC Therapeutics to Join S&P SmallCap 600

NEW YORK, Nov. 24, 2025 /PRNewswire/ -- S&P Dow Jones Indices will make the following changes to the S&P 500, S&P SmallCap 600: 

• S&P SmallCap 600 constituent Sandisk Corp. (NASD: SNDK) will replace The Interpublic Group of Companies Inc. (NYSE:IPG) in the S&P 500, and PTC Therapeutics Inc. (NASD: PTCT) will replace Sandisk in the S&P SmallCap 600 effective prior to the opening of trading on Friday, November 28. S&P 500 constituent Omnicom Group Inc. (NYSE:OMC) is acquiring The Interpublic Group of Companies in a deal expected to close soon, pending final conditions.
  
  
  
  
• Upwork Inc. (NASD: UPWK) will replace Premier Inc. (NASD: PINC) in the S&P SmallCap 600 effective prior to the open of trading on Friday, November 28. Patient Square Capital is acquiring Premier in a deal expected to be completed November 25, pending final closing conditions.
  
  
  
  
• First Interstate BancSystem Inc. (NASD: FIBK) will replace Hanesbrands Inc. (NYSE:HBI) in the S&P SmallCap 600 effective prior to the opening of trading on Tuesday, December 2. Gildan Activewear (TMX/NYSE:GIL) is acquiring Hanesbrands in a deal expected to be completed December 1, 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:

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SOURCE S&P Dow Jones Indices