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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.

In insecure times, security looks like an appealing sector for investment. That’s one interpretation of this week’s tally of the largest startup funding rounds.

The size of the largest U.S. deals was smaller than in recent weeks, and heavily featured cybersecurity- and privacy-focused startups. This includes the week’s biggest round — a $375 million Series B for consumer privacy and security platform . Other areas that attracted good-sized financings included AI infrastructure, biotech, healthcare, and robotics.

1. , $375M, privacy: Cloaked, a provider of consumer privacy and security tools, raised $375 million in Series B funding led by and . Founded in 2020, the Massachusetts-based company sells monthly subscriptions for individuals and families.

2. , $143M, AI infrastructure: Frore Systems, a developer of integrated cooling architecture for AI computing and networking hardware, announced that it closed on $143 million in Series D funding. led the financing, which set a $1.64 billion valuation for the 8-year-old, San Jose-based company.

3. (tied) , $120M, cybersecurity: Seattle-based XBow, a provider of autonomous security testing technology, picked up $120 million in Series C funding. and led the round, which values the 2-year-old company at over $1 billion.

3. (tied) , $120M, cybersecurity: Oasis Security, a developer of identify security tools with a focus on AI agents, secured $120 million in a funding round backed by , , and . The 4-year-old company, which is headquartered in  New York and has a presence in Israel, has raised $195 million to date, per ¸½½üÉÏÃÅ data.

5. (tied) , $100M, medical devices: Imperative Care, a medical device company focused on treatment for stroke and vascular diseases caused by blood clot formation, secured $100 million in convertible note financing. and led the investment for the Campbell, California-based company.

5. (tied) , $100M, social media: Seattle-based social network Bluesky this week that it raised a previously unannounced $100 million Series B round that closed last spring, led by .

5. (tied) , $100M, privacy and security: Cape, a recently launched privacy-focused mobile network, landed $100 million in Series C funding. and led the financing, which set a $900 million valuation for the Arlington, Virginia-based company.

8. , $80M, healthcare AI: Latent, an AI platform aimed at helping move patients from clinical decision to therapy, picked up $80 million in a Series A round. and led the financing for the San Francisco-based company.

9. , $77M, biotech: Cambridge, Massachusetts-based Crossbow Therapeutics, a biotech startup focused on developing new antibody therapies to treat a broad range of cancers, raised $77 million in Series B funding. and led the round, which will support a Phase 1 clinical trial of the company’s lead program.

10. , $52M, robotics: RoboForce, a startup focused on developing AI-enabled robot labor for industrial environments, said it $52 million in fresh funding, bringing its total raise to $67 million. led the financing for the Milpitas, California-based company.

Methodology

We tracked the largest announced rounds in the ¸½½üÉÏÃÅ database that were raised by U.S.-based companies for the period of March 14-20. Although most announced rounds are represented in the database, there could be a small time lag as some rounds are reported late in the week.

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