Cybersecurity M&A Roundup: 37 Deals Announced in October 2026, Led by Proofpoint–Varonis ($6.3B)
SecurityWeek tracked 37 cybersecurity M&A deals announced in October 2026, down from 39 in September. The largest is Proofpoint (owned by Thoma Bravo) agreeing to buy data security firm Varonis for about $6.3 billion in cash. IonQ will acquire zero trust firm Elisity in an all-stock deal worth up to $1.3 billion, expected to close in Q4 2026. Two deals involve AI-driven vulnerability discovery: Cohere signed a letter of intent for AISLE, and Hex-Rays agreed to buy HexAI (reportedly $30-35 million). Separately, Anthropic agreed to acquire Opaque Systems, a confidential AI company. Other notable deals: Absolute Security bought FirmGuard, Aikido Security bought OutKept and Cyberly and launched Noon, and Vista Equity Partners will acquire HID's PKI business. This is industry news with no direct threat to defenders.
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Cybersecurity M&A Roundup: 37 Deals Announced in October 2026, Led by Proofpoint–Varonis ($6.3B)
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SecurityWeek tracked 37 cybersecurity M&A deals announced in October 2026, down from 39 in September. The largest is Proofpoint (owned by Thoma Bravo) agreeing to buy data security firm Varonis for about $6.3 billion in cash. IonQ will acquire zero trust firm Elisity in an all-stock deal worth up to $1.3 billion, expected to close in Q4 2026. Two deals involve AI-driven vulnerability discovery: Cohere signed a letter of intent for AISLE, and Hex-Rays agreed to buy HexAI (reportedly $30-35 million). Separately, Anthropic agreed to acquire Opaque Systems, a confidential AI company. Other notable deals: Absolute Security bought FirmGuard, Aikido Security bought OutKept and Cyberly and launched Noon, and Vista Equity Partners will acquire HID's PKI business. This is industry news with no direct threat to defenders.