Which company works with petroleum, Apache Corporation or Alexion Pharmaceuticals?
Apache Corporation
Title: Alexion Pharmaceuticals
Passage: Alexion Pharmaceuticals Inc. is an American pharmaceutical company best known for its development of Soliris, a drug used to treat the rare disorders atypical hemolytic uremic syndrome (aHUS) and paroxysmal nocturnal hemoglobinuria (PNH).  The company is also involved in immune system research related to autoimmune diseases.  It employs around 2,400 people worldwide.  In February 2016, the company held the dedication ceremony for its new headquarters in New Haven, Connecticut, not far from the company's starting point in the same city.
Title: Hunt Petroleum
Passage: Hunt Petroleum Corporation was an oil and gas exploration and production company formed in 1950.  The company was originally called Petrol Production Co. and was later renamed Hunt Petroleum Corporation.  The company was a Delaware corporation owned 52.84% by the Margaret Hunt Trust Estate and 47.16% by the Haroldson L. Hunt, Jr.  Trust Estate.  The primary beneficiaries of these two trusts are the two eldest children of the late H. L. Hunt and Lyda Bunker Hunt.  Hunt Petroleum Corporation had no common ownership and was not affiliated with any of the following entities: Hunt Oil Company; Petro-Hunt, LLC; Hunt Exploration; Unity Hunt; Hunt Properties; or Rosewood Resources.
Title: Apache Corporation
Passage: Apache Corporation is an American petroleum and natural gas exploration and production company headquartered in Houston, Texas.
Apache Corporation Alexion Pharmaceuticals