principal investor
(8) the term “principal investor” means the insured depository institution that has the largest dollar amount invested in the equity of a bank service company. In any case where two or more insured depository institutions have equal dollar amounts invested in a bank service company, the company shall, prior to commencing operations, select one of the insured depository institutions as its principal investor and shall notify the depository institution’s appropriate Federal banking agency of that choice within 5 business days of its selection; and