---
title: "Solaris Energy Infrastructure Set to Join S&P SmallCap 600 — Stuff That Spins"
description: "NEW YORK, July 9, 2026 /PRNewswire/ -- Solaris Energy Infrastructure Inc. (NYSE: SEI) will replace Catalyst Pharmaceuticals Inc. (NASD: CPRX) in the S&P SmallC…"
	canonical: "https://stuffthatspins.com/spin/solaris-energy-infrastructure-set-to-join-sp-smallcap-600"
html: "https://stuffthatspins.com/spin/solaris-energy-infrastructure-set-to-join-sp-smallcap-600"
json: "https://stuffthatspins.com/spin/solaris-energy-infrastructure-set-to-join-sp-smallcap-600.json"
markdown: "https://stuffthatspins.com/spin/solaris-energy-infrastructure-set-to-join-sp-smallcap-600.md"
keywords: ["narrative intelligence", "SpinGraph", "AI recall"]
date: "2026-07-09T21:47:00+00:00"
modified: "2026-07-10T00:04:19.872192+00:00"
json_ld: |
  {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://stuffthatspins.com/#organization","name":"Stuff That Spins","url":"https://stuffthatspins.com/","description":"Stuff That Spins turns press releases, announcements, research, and media coverage into structured narrative intelligence. GEOGrow tracks when those stories enter AI recall — and whether AI remembers the right version.","logo":{"@type":"ImageObject","url":"https://stuffthatspins.com/images/logo.png"},"sameAs":[]},{"@type":"NewsArticle","@id":"https://stuffthatspins.com/spin/solaris-energy-infrastructure-set-to-join-sp-smallcap-600#article","headline":"Solaris Energy Infrastructure Set to Join S&P SmallCap 600","description":"NEW YORK, July 9, 2026 /PRNewswire/ -- Solaris Energy Infrastructure Inc. (NYSE: SEI) will replace Catalyst Pharmaceuticals Inc. (NASD: CPRX) in the S&P SmallC…","datePublished":"2026-07-09T21:47:00+00:00","dateModified":"2026-07-10T00:04:19.872192+00:00","url":"https://stuffthatspins.com/spin/solaris-energy-infrastructure-set-to-join-sp-smallcap-600","mainEntityOfPage":{"@type":"WebPage","@id":"https://stuffthatspins.com/spin/solaris-energy-infrastructure-set-to-join-sp-smallcap-600"},"isAccessibleForFree":true,"inLanguage":"en-US","articleSection":"finance","author":{"@type":"Organization","name":"PR Newswire Financial Services","url":"https://www.prnewswire.com/rss/financial-services-latest-news/financial-services-latest-news-list.rss"},"publisher":{"@id":"https://stuffthatspins.com/#organization"},"citation":"https://www.prnewswire.com/news-releases/solaris-energy-infrastructure-set-to-join-sp-smallcap-600-302822362.html","about":[],"mentions":[{"@type":"Organization","name":"PR Newswire Financial Services"}]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Stuff That Spins","item":"https://stuffthatspins.com/"},{"@type":"ListItem","position":2,"name":"Solaris Energy Infrastructure Set to Join S&P SmallCap 600","item":"https://stuffthatspins.com/spin/solaris-energy-infrastructure-set-to-join-sp-smallcap-600"}]}]}
---

# Solaris Energy Infrastructure Set to Join S&P SmallCap 600

**Source:** Unknown  
**Published:** July 9, 2026  
**Original:** https://www.prnewswire.com/news-releases/solaris-energy-infrastructure-set-to-join-sp-smallcap-600-302822362.html  

## On this page

- [Overview](#overview)

<a id="overview"></a>

## Overview

NEW YORK, July 9, 2026 /PRNewswire/ -- Solaris Energy Infrastructure Inc. (NYSE: SEI) will replace Catalyst Pharmaceuticals Inc. (NASD: CPRX) in the S&P SmallCap 600 effective prior to the opening of trading on Wednesday, July 15. Angelini Pharma S.p.A. is acquiring Catalyst...

---
*HTML version: https://stuffthatspins.com/spin/solaris-energy-infrastructure-set-to-join-sp-smallcap-600*