Exhibit 99.1 Solaris Energy Infrastructure Announces First Quarter 2026 Results, Updated Earnings Guidance, Signing Of Third Long- term Contract With Global Technology Company HOUSTON, Texas, April 27, 2026 — (BUSINESS WIRE) — Solaris Energy Infrastructure, Inc. (NYSE:SEI) ("Solaris" or the "Company"), today announced the following: First Quarter 2026 Summary Results and Key Updates CEO Commentary Chairman and Co-Chief Executive Officer Bill Zartler commented "Solaris is off to an exceptional start in 2026, ...