Madison Dearborn Partners is acquiring a majority stake in software company Unison Software Inc. from fellow private equity firm Carlyle Group Inc. 

Carlyle is keeping a minority stake, according to a statement. The transaction values Unison at more than $1 billion, including debt, people familiar with the matter said, who asked to not be identified because the terms are private.

Financing for the deal is being provided by Antares Capital. The deal is slated to close in the third quarter. 

Robert W. Baird & Co. is advising Unison and Carlyle on the deal while Lincoln International is advising Madison Dearborn. 

Read more: BNN Bloomberg