Exhibit 99.1 Rigel Provides Business Update and 2026 Outlook SOUTH SAN FRANCISCO, Calif., January 12, 2026 /PRNewswire/ -- Rigel Pharmaceuticals, Inc. (Nasdaq: RIGL), a commercial stage biotechnology company focused on hematologic disorders and cancer, today provided a business update including preliminary total revenue and net product sales for the fourth quarter of 2025, ongoing activity from the commercial business and development pipeline, and its financial outlook for 2026. "2025 was an excellent year ...