Exhibit 99.1 Sumisho Air Lease Announces First Quarter 2026 Results Los Angeles, California, May 7, 2026 — Sumisho Air Lease announces financial results for the three months ended March 31, 2026. Highlights Financial Overview First Quarter 2026 Results The following table summarizes the operating results for Sumisho Air Lease Corporation (the "Company") for the three months ended March 31, 2026 and 2025 (in millions, except per share amounts and percentages): Operating Results | | | | | | Three Months Ended ...