U.S. startups raise $5.5B in holiday week, energy and AI lead

Key takeaway

• During a shortened holiday week, ten U.S. startups announced major funding rounds totaling $5.5 billion（約8800億円）, with energy and AI infrastructure leading the way.

• Joulent secured the largest deal at $1.75 billion（約2800億円） from National Grid Ventures for AI-focused energy infrastructure, while Together AI raised $800 million（約1300億円） at an $8.3 billion（約1.3兆円） valuation.

• The breadth of rounds—spanning compliance tools, biotech, and video AI—reflects diverse investor appetite across compute-intensive and enterprise-focused sectors.

3 Key Points

FAQ

Which company raised the most funding in this week's top 10?

Joulent, a Houston-based energy infrastructure startup focused on the demands of artificial intelligence and other compute-intensive industries, raised $1.75 billion（約2800億円） in strategic financing backed by National Grid Ventures.

What was Together AI's valuation after its funding round?

Together AI's Series C round of $800 million（約1300億円） set a post-money valuation of $8.3 billion（約1.3兆円） for the San Francisco-based startup.

What other sectors besides energy and AI saw significant funding?

Biotech, homebuilding, compliance, and professional sports all secured large rounds. Beeline Medicines raised $126 million（約200億円） for autoimmune therapies, Higharc raised $95 million（約150億円） for AI-enabled homebuilding tools, and the Premier Lacrosse League closed a $100 million（約160億円） Series E round.