---
title: "Tenable Holdings Set to Join S&P SmallCap 600 | LEG Stock News"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/297094468.md"
description: "Tenable Holdings (TENB) will replace Leggett & Platt (LEG) in the S&P SmallCap 600 index effective before market open on August 31. This change occurs as Somnigroup International acquires Leggett & Platt, pending final closing conditions."
datetime: "2026-08-26T14:20:00.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/297094468.md)
  - [en](https://longbridge.com/en/news/297094468.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/297094468.md)
generator: "portal-rs"
---

# Tenable Holdings Set to Join S&P SmallCap 600 | LEG Stock News

, /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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## Related News & Research

- [Somnigroup Lifts Synergy Target to $75M After Closing Leggett & Platt Deal](https://longbridge.com/en/news/297862330.md)
- [Tenable Uses OpenAI GPT Cyber Models to Help Defenders Inspect Community-Built AI Components | TENB Stock News](https://longbridge.com/en/news/297963224.md)
- [Is Tenable (TENB) Quietly Rewriting Its AI Security Narrative With New Index And Policy Roles?](https://longbridge.com/en/news/298226873.md)
- [Tenable Joins White House-Led Project Watershed to Bolster U.S. Water Systems Cybersecurity | TENB Stock News](https://longbridge.com/en/news/297552854.md)
- [SGI: Leggett & Platt acquisition boosts integration, synergies, and EPS, positioning for industry recovery](https://longbridge.com/en/news/297802010.md)

---
> **Disclaimer: This article is for reference only and does not constitute any investment advice.**