#8. AT&T- $126.723 Billion
In the beginning the AT&T was split into seven “Baby Bells” smaller corporations that controlled telecommunications in particular regions around the US.
When the company was forced to break-up because the U.S Government ordered so, the Bell received the majority of AT&T ownership rights.
That’s how the developing of cellular and mobile communications began. All in addition to their landline service and started buying smaller companies that were related to telecommunications development and innovation.
They continued as Southwestern Bell Corporation (now known as SBC Communications Inc) and in 2002 their purchased the original parent company AT&T for $16 billion.
Since then, the company has continued to grow, and has focused the majority of its development on new technology and mobile communications.