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Thoma Bravo’s Proofpoint in talks to buy cybersecurity firm Varonis, source says

By Thomson Reuters Sep 2, 2026 | 2:33 PM

Sept 2 (Reuters) – Thoma Bravo-owned Proofpoint is in discussions to acquire cybersecurity firm Varonis Systems, a source familiar with ​the matter told Reuters on Wednesday.

Shares ‌of Varonis, which has a market value of about $5 billion, closed up over 10%.

Private equity firm Thoma Bravo declined a request for comment, while ‌Proofpoint ​and Varonis did not immediately ⁠respond.

Miami-based Varonis offers ⁠cybersecurity services, including data classification on cloud storage systems and employee behavior tracking, employing over 2,400 people across 14 global offices.

Its ​shares jumped about 30% following media reports in June that the firm was ⁠weighing a sale after ⁠fielding takeover interest from private ​equity firms.

Thoma Bravo in 2021 agreed to acquire ​Proofpoint, which sells software that helps companies ‌guard against cyberattacks, valuing the firm at about $12.3 billion in the take-private deal.

A takeover of Varonis would bring two complementary data ⁠security businesses together, allowing Proofpoint to strengthen its offerings around protecting sensitive corporate information and managing ⁠access to ‌it.

Deals in the cybersecurity space ⁠have slowed of late, in ​parallel ‌with other software firms, as the ​industry is ⁠among those perceived as vulnerable to a shakeout by rapid advances in AI technology.

(Reporting by Milana Vinn in New York, Utkarsh Shetti and Anzar Mehraj in Bengaluru; Editing by ​Joyjeet Das)