This study is being conducted to assess the long-term safety, tolerability, and efficacy of sotatercept in participants with Pulmonary Arterial Hypertension. The primary objective of this open-label, long-term follow-up study is to evaluate the long-term safety and tolerability of sotatercept when added to background PAH therapy in adult participants with PAH who have completed prior sotatercept studies. The secondary objective is to evaluate continued efficacy in adult participants with PAH who have completed prior sotatercept studies.
