SAST Aster DM Healthcare Ltd - 540975 - Disclosures of reasons for encumbrance by promoter of listed … BSE India The Exchange has received the Disclosures of reasons for encumbrance by promoter of listed companies under Reg. 31(1) read with Regulation 28(3) of SEBI (SAST) Regulations, 2011 on March 28, 2023 for Union Investments Pvt Ltd