Datsun was established in 1914 and was the first mass-produced Japanese motor vehicle. Nissan Motors was founded in 1933. The two companies merged in 1960. Both labels continued to be manufactured until 1982, which was the last year that "Datsun" appeared on the "Sentra" model.
The story is a bit complicated, but Datsun and Nissan merged, with datsun becoming a brand of Nissan (much like Lexus IS a brand of Toyota).
I am not aware of Seaboard Life Insurance Company buying any company. In 1999 Industrial Alliance purchased Seaboard Life Insurance Company. They were then merged with Industrial Alliance Pacific.
The London Company and the Plymouth Company merged to form the Virginia Company. Both the London Company and the Plymouth Company were stock market companies.
Fiat has purchased about 30% of Chrysler.
Virginia Company
which company were merged into one market by NAFTA
Cingular
Edison General Electric and Thomson-Houston Electric Company merged to form the General Electric Company in 1892.
Nextel is a phone company. It has now merged with Sprint.
It merged with Security First Life Insurance Company than this company merged with Metlife Investors USA Insurance Company. 800-284-4536
The airline company of American Airlines has just recently merged with the airline company US Airways Group during February of 2013. This decision to merge was based upon the idea to potentially create the largest airline in the world.
Teleregister merged with Bunker Ramo about 1965 and the Bunker Ramo became the name of the combined corporation. Bunker Ramo was purchased by ADP about 1995 and the company sold off the banking business and ended their manufacturing operation. The stock quotation business was merged with ADP's stock quotation business.
MGM