Helical Fusion Co., Ltd.
PrivateLast Round
Series B
Apr 27, 2026
Total Funding Raised
$41.88M
Momentum
Top 25%
of companies Caplight tracks
Company Overview
Helical Fusion Co., Ltd. is a clean technology company that develops commercial fusion reactors based on the helical-stellarator design to provide a sustainable and stable energy source.
Sector
Energy & Sustainability
Verticals
Renewable Energy, Advanced Materials
Business Model
B2B
Customer Profile
Services & Consulting, Government Contracts, Revenue Share
AI Layer
Non-AI
Keywords
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Helical Fusion Co., Ltd. Comps
Public and private peers based on sector, stage, and business model.
| Company | Status | Est. Valuation | Rev Multiple |
|---|---|---|---|
| OpenAI | Private | $86.0B | ~40x |
| Cohere | Private | $5.0B | -- |
| Competitor 1 | Public | $XX.XB | XXx |
| Competitor 2 | Public | $XX.XB | XXx |
Helical Fusion Co., Ltd. Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series B | Apr 27, 2026 | ||||
| Series A Extension | Dec 4, 2025 | ||||
| Debt | Jul 11, 2025 | ||||
| Series A | Jul 10, 2025 | ||||
| Grant | Oct 13, 2023 | ||||
Seed | Apr 5, 2023 |
Key People
Founding team and executive leadership
Helical Fusion Co., Ltd. Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Tokai Tokyo Investment Co., Ltd. | Series A |
| Sony Ventures Corporation | Pre Seed |
| Biotope by VIB | Pre Seed |
| Keio Innovation Initiative | Series A |
| Mizuho Capital | Series A |
| 株式会社日本政策金融公庫 | Series A, Debt |
| Nissay Capital | Series A |
Market signals
Structured signals derived from secondary market and firmographic data.
- Apr 27, 2026
Developing integrated demonstration device 'Helix HARUKA' in Japan.
- Apr 6, 2026
Selected for Tokyo Metropolitan Government's Zero Emission program.
Helical Fusion Co., Ltd. Filings
SEC and related filings with document metadata.
| Typed | Date | Amount Offered | Amount Sold | Filling | Pages | Download |
|---|---|---|---|---|---|---|
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Frequently Asked Questions
Common questions about Helical Fusion Co., Ltd.'s valuation, stock price, and market status.