Computer giant Dell is buying IT services provider and fellow Texan firm Perot Systems for $3.9bn (£2.4bn).
Dell said the takeover, which it hopes to conclude between November and January, will help it provide a wider range of services to its customers.
The all-cash deal will see Perot shareholders receive $30 per share, a 68% premium on the company's closing share price on Friday.
Perot is controlled by billionaire Ross Perot who twice ran for US president.
He ran as an independent candidate in both 1992 and 1996.
"We consider Perot Systems to be a premium asset with great people that enhances our opportunities for immediate and long-term growth," said Dell's chairman and chief executive.
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