What are the top companies that enjoy monopoly?

There are top companies that enjoy a monopoly in the market. They have monopolistic powers in the sectors they trade in. The reference to monopolistic companies - mean being the sole providers of products, and that there are no substitutes nor competitors.

Top companies enjoying monopoly are:

• Google - It is an internet provider, mainly offering browsing services. It controls 80% of the web search market. The company?s monopoly powers have been behind its branching off into mobile devices, online data storage, GPS tracking, google maps, and emails.
• Microsoft - The company dominates the software and hardware world. It enjoys its powers in the production of operating system software.
• Amazon - There are challenges for companies to compete with Amazon. The company has tentacles on e-books, pharmacy, grocery, content, retail, and logistics. It runs 92% of e-commerce and retail businesses.
• Luxottica - The Italian sunglasses company controls most of the sunglasses brands and designers. Luxottica manufactures and designs sunglasses frames. Moreover, it controls 95% of the brands in the eyeglasses industry.