As of March 2024, 56.53% is owned by Indian Promoters and 43.48% by Public.

Top five Promoters holding highest number of shares of Simplex Castings company are Ketan Shah (23.54 lakhs shares / 38.40%), Sangeeta Ketan Shah (7.76 lakhs shares / 12.66%), Sim Prabha Estates & Trading Co.(P) Ltd (2.38 lakhs shares / 3.87%), Hem Holdings And Trading Limited (48700 shares / 0.79%) and Jayshree Sanjiv Haria (38300 shares / 0.62%).