As of March 2025, 66.21% is owned by Indian Promoters and 33.79% by Public.

Institutional holds 3.01% (Insurance Companies 0.07%) and Non-Institutional holds 30.77% as Public shareholders.

Top three Promoters holding highest number of shares of Quest Laboratories company are Anil Kumar Sabarwal (102.08 lakhs shares / 62.29%), Tejaswini Sabarwal (4.18 lakhs shares / 2.55%) and Vinayak Sabarwal (2.25 lakhs shares / 1.37%).