RAD is long from $4.95 and is trading at $7.81 as of this writing. WBA is long from $29.60. As of this writing it is trading at $83.28.
RAD has a buyout offer from WBA for $9 cash. The stock is trading at a substantial discount to the offer because of the concern that the government will not approve the buyout.
RAD is running up on the rumor that the two companies have made good progress in finding a buyer for the stores to be divested. Previously, WBA has stated that it would be open to divesting up to 1000 stores but hopes that divestment may be only 500 stores to gain approval.