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.

Island, a developer of tools for secure enterprise digital operations, raised $400 million in Series F financing led by Evolution Equity Partners, setting a $6.4 billion valuation. Cyera, a provider of enterprise data security tools, also picked up $400 million in Series G extension funding led by Evolution Equity Partners and Goldman Sachs Growth Equity.

Snorkel AI secured $350 million in Series E funding for its foundational AI tools, valuing the company at $3.2 billion. Enveda, an AI-enabled drug discovery startup, closed on $311 million in Series E financing. Precision Neuroscience raised $250 million for brain-computer interface technology.

Other notable rounds include Hubble Network with $200 million for satellite connectivity, Rightway with $155 million for pharmacy benefits, and three tied $100 million rounds for Rainmaker, Numeral, and Micro1.