New sources.
New potential.
Compact fusion and the frontiers of energy science. We look for new ways to power the world.
FRONTIER ENERGY. HUMAN POSSIBILITY.
Energy
freedom.
We back the inventors expanding access to abundant energy and human freedom.
EXPLORE↓01 / OUR CONVICTION
Abundance begins
with energy.
Energy is the master resource. It shapes what we can build, where we can live, and how far we can go.
More abundant energy opens new possibilities for clean water, food, industry, and human potential. Burnwater invests in the technologies and people that can make that future real.
01
Clean at the source.
02
Resilient by design.
03
Greater independence.
02 / WHERE WE INVEST
A wider field
of possibility.
From the science of generation
to the systems that deliver it.
New sources.
Power where
it matters.
Wireless transmission and distributed infrastructure. Energy that reaches people where they are.
Extraordinary minds.
Enduring companies.
Leadership, commercialization, and founder support. The human work of bringing a breakthrough to the world.
03 / SELECTED INVESTMENTS
The frontier
is taking shape.
Explore the companies ↗01Frontier02Frontier03Frontier04Frontier05In market06In market07In market
Avalanche Energy
Desktop-sized fusion reactors, two feet tall.
Casimir
Microchips that power themselves from the quantum vacuum.
Marathon Fusion
Fusion fuel from mercury, with gold as the by-product.
International Space Federation
Zero-point energy for homes, transport, and microgrids.
Reach
Wireless power transmission. Tesla’s vision, made real.
Tandem PV
Perovskite solar that captures the full spectrum.
Exowatt
Ultra-long solar storage for AI data centers.
04 / THE FOUNDER
3×Technology founder
StanfordMBA
Jeffrey
Stein.
FOUNDER & MANAGING PARTNER
A founder’s instinct.
A frontier mindset.
Jeffrey’s experience includes building Orbital Insight and Deep Discovery and helping founders turn ambitious ideas into organizations that endure.
At Burnwater, he brings that operator’s perspective to energy: curiosity about what might be possible, discipline about what can be demonstrated, and a commitment to the people doing the work.
As an executive coach to founder CEOs, he understands the human dimension of building a company.
Katy Nelson
Venture Partner
Bryan Franklin
Venture Partner
Cassandra Carothers
Venture Partner
Payam Banazadeh
Technical Advisor
Build what
comes next.
For inventors. For investors.
For people who see the possibility.