Solaris Energy Infrastructure to join S&P SmallCap 600, replacing Catalyst Pharmaceuticals

Seeking Alpha·10 Jul 2026·Read original

2▲1 ▼1Impact / 5

Corporate Action Biotechnology

Summary · why it matters

Solaris Energy Infrastructure will join the S&P SmallCap 600 index before the market opens on July 15, replacing Catalyst Pharmaceuticals. Catalyst Pharmaceuticals is being acquired by privately held Italian drugmaker Angelini Pharma in an all-cash transaction valued at about $4.1 billion. The index change will take effect prior to the opening of trading on Wednesday, July 15. Solaris Energy Infrastructure stock price rose almost 5% on Thursday after-market hours.

Catalyst Pharmaceuticals Inc ▼

Solaris Energy Infrastructure, Inc. ▲

Impact on assets 2

Biotech & Genomic Medicine▼ · 1 stocks

Catalyst Pharmaceuticals Inc

▼ NegativeCapitalrelevance

Catalyst Pharmaceuticals is being acquired by Angelini Pharma, ending its independent existence.

Energy▲ · 1 stocks

Solaris Energy Infrastructure, Inc.

▲ PositiveCapitalrelevance

Solaris Energy Infrastructure is being added to the S&P SmallCap 600 index, which typically attracts passive fund inflows.

Off-coverage companies 1

Angelini PharmaPrivate± Mixed

relevance