A Study of Mosliciguat in Combination With Inhaled Treprostinil in PH-ILD

Inclusion Criteria: * Participants willing and able to provide informed consent * Participants on inhaled treprostinil * Participants with diagnosis of Interstitial Lung Disease (ILD). Diagnosis will be confirmed by a high-resolution computerized tomography (HR-CT) scan showing diffuse parenchymal disease. Eligible diagnosed diseases include: 1. Idiopathic interstitial pneumonia (IIP) 2. Chronic hypersensitivity pneumonitis 3. ILD associated with connective tissue disease (CTD) with a forced vital capacity (FVC) \< 70% of predicted * Confirmed pulmonary hypertension (PH) by right heart catheterization (RHC). * Ability to perform 6MWD ≥100 meters. Exclusion Criteria: * Diagnosis of PH Group 1 (eg. pulmonary arterial hypertension), Group 2 (related to left-heart dysfunction), Group 4 (eg, chronic thromboembolic pulmonary hypertension), or Group 5 (eg, unclassified). * Exacerbation of underlying lung disease within 28 days prior to randomization. * Initiation of pulmonary rehabilitation within 28 days prior to randomization. * Receiving \>10 L/min of oxygen supplementation by any mode of delivery at rest at Baseline. * History or intolerance to or lack of efficacy with mosliciguat or sGC stimulators or activators. * Receipt of investigational, or experimental therapy within 42 days OR 5 half-lives prior to randomization. Note: Other inclusion and exclusion criteria may apply.