Mega Investments Keep Flowing: This Week's 10 Largest Startup Raises Across AI, Enterprise & Space
Startup investors were in a spendy mood this week, backing more than a dozen rounds in the multiple hundreds of millions — led by Ramp's massive $750M raise.
Startup investors were in a spendy mood this week, backing more than a dozen rounds in the multiple hundreds of millions. The biggest went to spend-management platform Ramp, which closed on $750 million, followed by three $500 million rounds for companies in the AI and space tech sectors.
This week's top 10 rounds
From finance software to fusion energy, longevity medicine to AI music — here's the full breakdown of the week's largest venture deals in the U.S.
| # | Company & Sector | Key Investors | Amount |
|---|---|---|---|
| 1 |
Ramp
Finance Software · New York
|
Iconiq, GIC, Ontario Teachers' | $750M |
| 2 |
Impulse Space
Space Tech · Redondo Beach, CA
|
137 Ventures, Banner VC | $500M |
| 2 |
Supabase
AI Developer Tools · San Francisco
|
GIC | $500M |
| 2 |
Flourish
Foundational AI · New York
|
Jeff Bezos, Lux Capital, GV | $500M |
| 4 |
Helion
Fusion Energy · Everett, WA
|
Thrive Capital | $465M |
| 5 |
NewLimit
Longevity Medicine · South San Francisco
|
Founders Fund | $435M |
| 6 |
Suno
AI Music · Cambridge, MA
|
Bond | $400M |
| 6 |
Generalist AI
Robotics · San Mateo, CA
|
Radical Ventures | $400M |
| 7 |
AlphaSense
AI Enterprise Software · New York
|
Vitruvian, Accenture, JPM | $350M |
| 8 |
Mach Industries
Defense Tech · Huntington Beach, CA
|
Ribbit Capital, Infinite Capital | $300M |
Enterprise & AI dominate
Finance software and AI platforms captured the lion's share of capital, with Ramp, Supabase, Flourish, and AlphaSense all raising in the enterprise or AI space.
Deep tech surges
Space tech, fusion energy, longevity medicine, and defense tech all made the top 10 — a sign investors are bullish on long-horizon, high-impact bets.
Startup investors were in a spendy mood this week, backing more than a dozen rounds in the multiple hundreds of millions.
Notable deal highlights
Ramp's $750M round at a $44 billion valuation makes it one of the most valuable private fintech companies in the world. The seven-year-old New York company offers spend management software and has seen rapid enterprise adoption.
Three companies tied for second at $500M each — Impulse Space (orbital transport), Supabase (open-source developer platform valued at $10.5B), and Flourish (brain-inspired AI backed by Jeff Bezos and Google Ventures).
Helion's $465M Series G at a $15.5B valuation pushes the fusion energy startup's total funding past $1.5B, underscoring growing investor conviction in clean energy moonshots. Meanwhile NewLimit, co-founded by Coinbase CEO Brian Armstrong, closed a $435M Series C for epigenetic longevity medicines.