---
title: "Why Solaris Energy Infrastructure (SEI) stock is up today"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/292353370.md"
description: "Solaris Energy Infrastructure (SEI) shares rose 5.9% after S&P Dow Jones Indices announced its inclusion in the S&P SmallCap 600 index, effective July 15. This addition replaces Catalys."
datetime: "2026-07-10T19:59:47.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/292353370.md)
  - [en](https://longbridge.com/en/news/292353370.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/292353370.md)
generator: "portal-rs"
---

# Why Solaris Energy Infrastructure (SEI) stock is up today

What Happened? Shares of mobile power and logistics company Solaris Energy Infrastructure (NYSE:SEI) jumped 5.9% in the afternoon session after S&P Dow Jones Indices announced the company will be added to the S&P SmallCap 600 index. The inclusion will be effective prior to the opening of trading on Wednesday, July 15, with Solaris replacing Catalys...

### Related Stocks

- [SEI.US](https://longbridge.com/en/quote/SEI.US.md)
- [CPRX.US](https://longbridge.com/en/quote/CPRX.US.md)

## Related News & Research

- [Solaris Oilfield Infrastructure outlines Omega acquisition strategy, expanded turnkey EPC capabilities in investor deck](https://longbridge.com/en/news/297774224.md)
- [Solaris Energy Infrastructure (NYSE:SEI) Given "Buy" Rating at Needham & Company LLC](https://longbridge.com/en/news/297815843.md)
- [Solaris Energy Infrastructure acquires Omega Foundation Services for about $101 million cash, stock](https://longbridge.com/en/news/297773731.md)
- [Northland Securities Forecasts SEI FY2026 Earnings](https://longbridge.com/en/news/296739865.md)
- [Solaris Energy Infrastructure: Buy Rating Reiterated as Strong Quarter and Contract Extensions Support Unchanged $104 Price Target](https://longbridge.com/en/news/295021681.md)

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