Marathon Fusion
Marathon Fusion is a startup that develops tritium fuel systems for fusion power and produces isotopes for radiopharmaceuticals, based in San Francisco.
Leadership
Kyle Schiller, CEO and Co-founder. Kyle Schiller is the chief executive and co-founder of Marathon Fusion, a San Francisco startup.
Who it reaches
Patients in targeted cancer therapy, through radioisotope supply, and fusion power developers that need tritium and lithium-6 fuel.
Marathon Fusion funding rounds
| Date | Round | Amount |
|---|---|---|
| Jul 18, 2024 | seed | $5.9 million |
Key facts
- founded
- 2023, per the company's July 18, 2024 releasesource
- seed round
- $5.9 million, announced July 18, 2024, led by 1517 Fund and Anglo Americansource
- total funding
- $6.9M including an ARPA-E CREATE award, per the July 18, 2024 releasesource
- stage
- Seed-stage startup eyeing a Series A, per Heatmap on 27 August 2026source
- self-description
- A leader in isotope production for the radiopharma and fusion industries, per its August 27, 2026 releasesource
WYDE coverage of Marathon Fusion
WYDE Newsroom has published 2 articles about Marathon Fusion, from Oct 24, 2026 to Oct 24, 2026. Marathon Fusion is the subject of 2 stories. The most recent is Feed People, Get Ahead: 7 Days Left to Apply for $1 Million Creator Fund.
Feed People, Get Ahead: 7 Days Left to Apply for $1 Million Creator Fund
WYDE Weekly: one week is left to apply to EAT's $1 million clipping fund, open through October 31. Plus Musk's $10B pledge, $720 million for global hunger with no plan yet, a $4 million SNAP fraud case, $250 million for Hebrew University and the week in giving, AI and health.
Oct 24, 2026 · 7 min read · Subject of the story
HealthcareMarathon Fusion Says Its Neutrons Can Make Medical Isotopes and Gold at 10x CERN Rate
Marathon Fusion said its fusion neutrons can make medical isotopes for targeted cancer therapy and turned mercury into gold, beating CERN's record by a factor of 10.
Oct 24, 2026 · 4 min read · Subject of the story
Reported alongside Marathon Fusion
- AGC International · in 1 story with Marathon Fusion
- Agentic AI Foundation · in 1 story with Marathon Fusion
- Anthropic · in 1 story with Marathon Fusion
- Baba · in 1 story with Marathon Fusion
- CERN · in 1 story with Marathon Fusion
- Dolly Parton's Imagination Library · in 1 story with Marathon Fusion
- The Duke Endowment · in 1 story with Marathon Fusion
- Ford Foundation · in 1 story with Marathon Fusion
Sources
- PR Newswire: Marathon Fusion Closes $5.9m Seed Round to Process Fuel for Fusion Energy
- TechCrunch: Without this company's technology, future fusion power plants might never light up
- Heatmap: Exclusive: Marathon Fusion Achieves Reactor Fuel Breakthrough
- PR Newswire: Marathon Fusion Demonstrates Lithium and Hydrogen Isotope Enrichment Using Proprietary Plasma Centrifuge Technology
- Marathon Fusion homepage
Track the institutions that move money.
Data-driven coverage, every week.