Here are the ten biggest corporate acquisitions in U.S. history:

1. Gulf by Standard Oil California (now Chevron), $13.4 billion in 1984.2. Getty by Texaco, $10.1 billion, 1984.

3. Standard Oil by British Petroleum (already owned 55 percent), $7.9 billion , 1987.

4. Conoco bu Du Pont, $7.4 billion, 1981.

5. Federated Department Stores by Campeau, $6.58 billion, 1988.

6. Marathon Oil by U.S. Steel (now USX), $6.5 billion, 1982.

7. RCA by General Electric, $6.4 billion, 1986.

8. Superior Oil by Mobil, $5.7 billion, 1984.

9. Shell by Royal Dutch-Shell (already owned 69.5 percent), $5.7 billion, 198 5.

10. General Foods by Philip Morris, $5.6 billion, 1985.