Private equity firm Kelso & Co. has completed the acquisition of information technology company Sirius Computer Solutions Inc. from Thoma Bravo.

Sirius, based in San Antonio, Texas, and founded in 1980 makes cloud software, IT networking products and software for mobile devices.  The company works with major technology companies including, Cisco Systems Inc. (Nasdaq: CSCO), IBM (NYSE: IBM) and Microsoft Corp. (Nasdaq: MSFT) Thoma Bravo invested in Sirius in 2006 when the target had $600 million in annual revenue. Sirius is expecting to finish 2015 with about $1.7 billion in revenue.

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