Solaris Energy Infrastructure Set to Join S&P SmallCap 600

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 Pharmaceuticals in a deal expected to close 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 July 15, 2026 S&P SmallCap 600 Addition Solaris Energy Infrastructure SEI Energy July 15, 2026 S&P SmallCap 600 Deletion Catalyst Pharmaceuticals CPRX Health Care