NEW YORK, Aug. 26, 2026 /PRNewswire/ -- Tenable Holdings Inc. (NASD: TENB) will replace Leggett & Platt Inc. (NYSE: LEG) in the S&P SmallCap 600 effective prior to the opening of trading on Monday, August 31. S&P MidCap 400 constituent Somnigroup International Inc. (NYSE: SGI) is acquiring Leggett & Platt in a deal expected to be completed 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 | |
Aug 31, 2026 | S&P SmallCap 600 | Addition | Tenable Holdings | TENB | Information Technology | |
Aug 31, 2026 | S&P SmallCap 600 | Deletion | Leggett & Platt | LEG | Consumer Discretionary | |
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