ConocoPhillips said Wednesday it had agreed to buy Marathon Oil in an all-stock deal worth $22.5 billion, including about $5.4 billion of debt. Marathon Oil shareholders will receive 0.255 ConocoPhillips shares for each Marathon share they own, representing a 14.7% premium to the closing price on Tuesday. Shares of Marathon (MRO) were up more than 10% in premarket trade, while Conoco (COP) stock was down about 2%. “This acquisition of Marathon Oil further deepens our portfolio and fits within our financial framework, adding high-quality, low cost of supply inventory,” Ryan Lance, ConocoPhillips CEO, said in a statement. Until 1962, Marathon Oil was called The Ohio Oil Company, which was founded in 1887 and was bought two years later by John D. Rockefeller’s Standard Oil.

---

Persons: Hess, ” Ryan Lance, John D, Lee Tillman, ” Tillman Organizations: London CNN, Big Oil, ConocoPhillips, Oil, Marathon Oil, Occidental, Diamondback Energy, Endeavor Energy Partners, Marathon, Financial Times, Devon Energy, Ohio Oil Company Locations: Conoco, Houston, multibillion