Rite Aid has signed a “rebate aggregation agreement” with Prime Therapeutics, a Blue Cross Blue Shield-owned pharmacy benefits management, in an effort to boost profit margins and industry competitiveness. The agreement relies on Prime Therapeutics, which is owned by 19 Blue Cross Blue Shield Plans, to help manage rebates, but may also be the first step to a closer relationship between the entities. “The CEO of Prime and I have discussed this to further partner in some very interesting ways, which I can’t get into now,” Rite Aid CEO Heyward Donigan said during an earnings call.