CVS Caremark Corp. reported that profit for the quarter ended June 30 leaped 18.4% to a record $966 million from $816 million last year, boosted by the contractual impasse between rival Walgreens and Express Scripts.

After months of slumping sales following its split with Express Scripts Holding Co., Walgreens said it has forged a new multi-year contract with the prescription provider and will begin filling Express Scripts prescriptions on Sept. 15.

Pharmacy benefits manager Express Scripts and Walgreens said they are ending a legal dispute.

Walgreens’ fiscal second-quarter earnings fell 7.7% due in part to its decision to leave the Express Scripts pharmacy network.

Higher front-end sales for the month of February helped counter-balance lost revenue from Express Scripts prescriptions, Walgreeens reported Monday.

Walgreen Co. reported that profit for the quarter ended Nov. 30 dropped 4.5% to $554 million, compared with $580 million in the year-ago period.

Walgreen Co. said Tuesday it will terminate a $5.3 billion-per-year relationship with Express Scripts.

A report released Monday by Bloomberg said that Walgreen Co. is seeking to sell its...