As of September 2025, 66.78% is owned by Indian Promoters and 33.22% by Public.

Top three Promoters holding highest number of shares of Quest Laboratories company are Anil Kumar Sabarwal (102.91 lakhs shares / 62.80%), Tejaswini Sabarwal (4.24 lakhs shares / 2.59%) and Vinayak Sabarwal (2.29 lakhs shares / 1.40%).