Proofpoint Acquires Varonis in $6.3B Cybersecurity Deal

Thoma Bravo-owned cybersecurity company Proofpoint has agreed to acquire Israeli data security firm Varonis Systems in an all-cash deal valued at about $6.3 billion, the companies announced Thursday — one of the largest cybersecurity acquisitions of 2026.

Under the terms of the definitive agreement, Varonis shareholders will receive $49.75 per share in cash, representing a 52% premium over Varonis’ closing stock price of $32.71 on June 22, 2026 — the last full trading day before initial rumors of a potential sale first emerged.

Varonis shares rose about 2.7% in extended trading after the announcement.

Proofpoint Acquires Varonis: Deal Details

• Value: approximately $6.3 billion in cash; equity value of $5.71 billion.
• Price per share: $49.75 — a 52% premium to June 22 and a 17% premium to Sept. 1, 2026.
• Valuation multiples: about 53x last-twelve-months free cash flow and 8.4x last-twelve-months revenue.
• Expected close: first half of 2027, subject to shareholder and regulatory approval; Varonis will be delisted from Nasdaq afterward.
• Advisors: Goldman Sachs advised Varonis; BofA Securities, Morgan Stanley, J.P. Morgan, UBS and Mizuho advised Proofpoint.

Why Proofpoint Is Buying Varonis

The combined company will serve more than 16,000 enterprises and millions of organizations globally, creating one of the world’s leading pure-play cybersecurity companies and what the companies call the industry’s largest data and AI cybersecurity organization.

“As AI becomes embedded across the enterprise, the data it can access determines both its value and its risk,” Proofpoint Chief Executive Sumit Dhawan said. “AI agents are now reaching into sensitive information and taking action across systems.”

Varonis’ data mapping and access controls are meant to slot in next to Proofpoint’s email, collaboration and data-loss-prevention products as one unified platform. More than 80 of the Fortune 100 already use Proofpoint, the company says.

A Turnaround Story for Varonis

The deal caps a turbulent year for Varonis. The company dates to 2005, when Yaki Faitelson — who still runs it as chief executive — co-founded it with Ohad Korkus. Early versions of the software mapped who could open which files on corporate file servers; AI security now sits at the center of its pitch.

About a year ago, the company cut its forecasts and announced layoffs affecting 5% of its workforce, sending shares plunging 45% in a single day — one of the worst days in its history. The stock has yet to recover to its previous level above $60 a share, Haaretz reported.

The sale also follows months of speculation: Bloomberg first reported in June that Varonis was fielding early interest from private equity firms including Blackstone, Thoma Bravo and Vista Equity Partners, with Proofpoint emerging as the buyer in September reporting. Varonis’ shares surged about 30% when sale rumors first surfaced.

Biggest Deal in Proofpoint’s Buying Spree

The acquisition is the largest in a run of purchases Proofpoint has made since Thoma Bravo paid $12.3 billion to take it private in 2021. German Microsoft 365 security provider Hornetsecurity was among last year’s purchases.

It also extends a consolidation wave across cybersecurity, where AI-driven threats — and AI-driven theft of corporate data — have pushed businesses to ramp up security spending and vendors to bundle products into broader platforms.

The timing is notable: the deal landed during a week when AI stocks tumbled on Wall Street as investors questioned whether heavily indebted data-center operators can become profitable quickly enough, with neocloud companies Nebius and Iren falling and CoreWeave’s slump spotlighting the debt behind the AI boom. Even as software valuations wobble, enterprise spending on security remains one of the stickiest budgets in IT — making cybersecurity one of the few sectors still commanding premium takeover multiples.

Varonis in the Spotlight

Founded in 2004, Varonis employs about 2,800 people, including roughly 1,000 in Israel, where its development center is based, according to Haaretz. The company has developed a cloud-based platform that uses artificial intelligence to identify and classify sensitive organizational data, minimize its exposure and detect threats through automation.

Varonis said it will announce third-quarter financial results on Nov. 3 but will not hold an earnings conference call — a standard move for a company about to be acquired.

What It Means for the Cybersecurity Market

Analysts say the merger reflects where enterprise security budgets are heading: protecting the data that AI systems touch. As AI agents gain access to sensitive corporate information, the ability to classify data, control access, and detect threats through automation becomes central to security spending.

Investors will be watching whether Proofpoint can integrate Varonis quickly and deliver the promised combined platform — and whether the deal signals more consolidation to come in the sector.