Buyout firm KKR & Co Inc is nearing a deal to acquire data security firm Barracuda Networks Inc from its private equity owner Thoma Bravo for roughly $4 billion, according to people familiar with the matter.

Barracuda, which manages data security of its customers over the cloud on a subscription basis, was taken private by Thoma Bravo in 2017.

KKR declined to comment. Barracuda and Thoma Bravo did not immediately respond to requests for comment.

(Reporting by Chibuike Oguh in New York, Writing by Anirban Sen; Editing by Saumyadeb Chakrabarty)