Proofpoint in Advanced Talks to Acquire Cybersecurity Firm Varonis Systems in roughly $5 Billion Deal

Thoma Bravo-owned Proofpoint is in advanced talks to acquire Varonis Systems, a publicly traded cybersecurity company with a market value of around $5 billion, according to sources familiar with the matter. The Wall Street Journal, Reuters, and Bloomberg all reported the discussions on Wednesday, with one source indicating a transaction could be announced in the coming weeks, though no final decision has been made.

Shares of Varonis surged approximately 13% on Wednesday afternoon following the news, reflecting investor expectations of an acquisition premium. Varonis had previously drawn interest from multiple private equity firms, including Blackstone and Vista Equity Partners, after weighing a potential sale earlier in 2026.

A deal would expand Proofpoint's cybersecurity portfolio under Thoma Bravo, a private equity firm with deep holdings in the sector. Proofpoint itself has been managing a significant debt load taken on as part of its earlier acquisition by Thoma Bravo, adding financial complexity to any potential transaction.