Proofpoint agrees to acquire Varonis Systems for $6.3 billion

The input provides direct evidence of a newly announced, approximately $6.3 billion all-cash acquisition of Varonis Systems by Proofpoint, including the per-share consideration, premium, expected closing window, and shareholder and regulatory conditions. This is materially new information relative to the earlier report of preliminary acquisition talks and has clear forward implications for Varonis shareholders and cybersecurity-sector consolidation, so merger_acquisition is the appropriate type. Importance is high but not maximal because completion remains conditional and the acquirer is privately held; surprise is moderate because potential talks had already been reported. Confidence is high for the core deal terms, while the exact announcement time is estimated from the 20:24Z wire publication because only the October 15, 2026 announcement date is explicitly stated. Varonis is the only approved stakeholder because it is the direct public-company target; Proofpoint has no exact symbol in the input, and effects on other cybersecurity companies are indirect and speculative.