Amendment No. 3 to Schedule 13D for Scholar Rock Holding Corp

This Amendment No. 3 to Schedule 13D, filed by Samsara BioCapital, L.P., Samsara BioCapital GP, LLC, Samsara Opportunity Fund, L.P., Samsara Opportunity Fund GP, LLC, and Dr. Srinivas Akkaraju, updates the ownership details of common stock in Scholar Rock Holding Corp. The amendment includes transactions where Samsara Opportunity Fund purchased shares in both private sales and open market transactions. The total beneficial ownership of the reporting persons includes 5,302,810 shares of common stock directly held by Samsara LP, 1,064,804 shares issuable upon the exercise of RD Warrants, 500,439 shares directly held by Samsara Opportunity Fund, and 123,500 shares held by Dr. Akkaraju. The amendment also reaffirms the joint filing agreement among the reporting persons.