B) 50% Explanation: Promoters of insurance companies will be forced to maintain their shareholding at 50 per cent even after listing under the guidelines proposed by the insurance regulator. This is in sharp contrast to the banking sector where the regulator insists that promoters of banks dilute their shareholding to 20 per cent within a time frame. The minimum shareholding requirements are part of the Insurance Regulatory and Development Authority of India‘s (IRDAI) draft guidelines for listed companies.