Please provide an explanation.

ABC loaned to MNO P40,000 for which the latter pledged 400 shares of stock in XYZ Inc. It was agreed that if the pledgor failed to pay the loan with 10% yearly interest within four years, the pledgee is authorized to foreclose on the shares of stock. As required, MNO delivered possession of the shares to ABC with the understanding that the shares would be returned to MNO upon the payment of the loan. However, the loan was not paid on time. A month after 4 years, may the shares of stock pledged be deemed owned by ABC or not? Reason