Sejak 2004, OCBC Bank Singapore OCBC melalui anak perusahaan yang dimiliki sepenuhnya, OCBC Overseas Investment Pte. Ltd., telah menjadi pemegang saham mayoritas Bank NISP dengan kepemilikan per 30 Juni 2007 sebesar 72,4 persen saham.
Since 2004, OCBC Bank of Singapore through OCBC Overseas Investment Pte. Ltd., OCBC's full subsidiary, has been the majority shareholder of NISP Bank, controlling 72.4 percent of the bank's shares as per June 30, 3007.