FMI notes osteoarthritis gene therapy market surpassed a value of USD 8.7 billion in 2025. Demand is expected to reach USD 9.4 billion in 2026 and USD 20.1 billion by 2036. In vivo gene therapy is anticipated to lead by Therapy Type with 52.8% share in 2026, at a CAGR of 7.9% and Viral vectors is estimated to lead by Vector Type in 2026.