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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
.
Startup investors were in a spendy mood this week, backing more than a dozen rounds in the multiple hundreds of millions. Of those, the biggest one 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.
1.
Ramp
, $750M, finance software:
Spend-management software provider Ramp secured $750 million in a financing led by
Iconiq
,
GIC
, and
Ontario Teachers’ Pension Plan
. The round set a $44 billion valuation for the seven-year-old, New York-based company.
2 (tied).
Impulse Space
, $500M, space tech:
Redondo Beach, California-based Impulse Space, a developer of spacecraft and propulsion systems for transport, moving and orbital repositioning in space, raised $500 million in Series D funding.
137 Ventures
and
Banner VC
led the financing which brings total investment to date to more than $1 billion.
2 (tied).
Supabase
, $500M, AI developer tools:
Supabase, provider of an open source platform for developers and AI app builders, closed on $500 million in fresh funding.
GIC
led the financing, which set a $10.5 billion valuation for the six-year-old, San Francisco-based company.
2 (tied).
Flourish
, $500M, foundational AI:
New York-based Flourish, a startup working on artificial intelligence models inspired by the human brain, raised $500 million in initial funding. Backers include
Jeff Bezos
,
Lux Capital
, and
Google Ventures
.
4.
Helion
, $465M, fusion energy:
Helion, a startup with a mission to build the world’s first fusion power plant, picked up $465 million in Series G funding led by
Thrive Capital
at a $15.5 billion post-money valuation. The round brings total reported funding for the Everett, Washington-based company to at least $1.5 billion, per Crunchbase data.
5.
NewLimit
, $435M, longevity medicines:
NewLimit, a developer of medicines designed to restore youthful function in old cells through epigenetic reprogramming, closed on $435 million in Series C funding.
Founders Fund
led the financing for the South San Francisco, California-based company, which was co-founded by
Coinbase
CEO
Brian Armstrong
.
6 (tied).
Suno
, $400M, AI for music:
Suno, a provider of AI tools for making music, raised $400 million in Series D funding led by
Bond
. The round set a $5.4 billion valuation for the company, which is currently facing lawsuits from multiple music labels for training its AI on copyrighted materials.
6 (tied).
Generalist AI
, $400M, robotics:
Generalist AI, a startup focused on using AI to enable robots to do complex tasks, picked up $400 million in new funding led by
Radical Ventures
. The financing reportedly set a $2 billion valuation for the two-year-old, San Mateo, California-based company.
9.
AlphaSense
, $350M, AI enterprise software:
AlphaSense, an AI-enabled market intelligence and workflow orchestration platform, closed on $350 million in a new funding round led by
Vitruvian Partners
,
Accenture Ventures
, and
J.P. Morgan Asset Management
,
D. E. Shaw Ventures
, and
Pinegrove Opportunity Partners
. The round set a $7.5 billion valuation for the New York-based company.
10.
Mach Industries
, $300M, defense tech:
Defense tech startup Mach Industries raised $300 million in Series C funding at a $1.8 billion valuation.
Ribbit Capital
and
Infinite Capital
led the financing for the three-year-old, Huntington Beach, California-based company.
Illustration:
Dom Guzman
— Source: Crunchbase News (https://news.crunchbase.com/venture/biggest-funding-rounds-june-5-2026/)