The Week’s 10 Biggest Funding Rounds: Cybersecurity, AI And Health Take The Lead 

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This is a weekly feature that runs down the week’s Top 10 announced funding rounds in the U.S. Check out last week’s biggest funding deal roundup here. This week delivered a bountiful supply of big startup funding rounds, led by two $400 million financings for cybersecurity unicorns Island and Cyera. Rounding out the week were large financings for startups across hot sectors, including foundational AI, drug discovery, neurotech, and even rainmaking. 1. Island, $400M, cybersecurity: Island, a developer of tools for secure enterprise digital operations, raised $400 million in Series F financing. Evolution Equity Partners led the round, which set a $6.4 billion valuation for the Dallas-based company, more than double its 2024 valuation. 2. Cyera, $400M, cybersecurity: Cyera, a provider of enterprise data security tools that govern both humans and AI agents, picked up $400 million in Series G extension funding led by Evolution Equity Partners and backed by Goldman Sachs Growth Equity. The round brings total funding for New York-based Cyera to $2.7 billion, per Crunchbase data. 3. Snorkel AI, $350M, foundational AI: San Francisco-based Snorkel AI, provider of tools for frontier labs and AI teams to develop specialized training data and environments, secured $350 million in Series E funding. Insight Partners and S32 led the round, valuing the 7-year-old company at $3.2 billion, and it now has more than $375 million in annual recurring revenue. 4. Enveda, $311M, biotech: Enveda, an AI-enabled drug discovery startup, closed on $311 million in Series E financing led by Catalio Capital Management and joined by a long list of new and existing investors.