BOSTON--(BUSINESS WIRE)--Ironwood Pharmaceuticals, Inc. (Nasdaq: IRWD), a biotechnology company developing and commercializing life‑changing therapies for people living with gastrointestinal (GI) and rare diseases, today reported its fourth quarter and full‑year 2025 results and recent business performance. “In 2025, LINZESS delivered 11% EUTRx demand growth year-over-year, continuing to strengthen its position as the prescription market leader for the treatment of IBS-C and CIC, surpassing 5.7.