ProtonDx
PrivateLast Round
Seed
Dec 4, 2025
Total Funding Raised
$4.58M
Momentum
Top 25%
of companies Caplight tracks
Company Overview
ProtonDx operates in Healthcare & Life Sciences and is based in London. Its latest recorded funding round was a Seed round in December 2025.
ProtonDx is a diagnostic equipment company that develops a portable molecular diagnostic platform designed to deliver rapid, laboratory-grade testing at the point of need.
Sector
Healthcare & Life Sciences
Verticals
Medical Devices, Biotech Equipment, Biotechnology
Business Model
B2B
Customer Profile
Hardware + Subscription, Hardware Sales, Government Contracts
AI Layer
Non-AI
Historical Pricing
Historical view of private secondary pricing and transaction trends.
ProtonDx Comparables
Compare ProtonDx with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Alveo Technologies | 88% | |
| Llusern Scientific | 85% | |
| QuidelOrtho | 84% |
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ProtonDx Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Seed | Dec 4, 2025 | ||||
| Grant | Jun 25, 2025 | ||||
| Grant | Feb 18, 2025 | ||||
| Grant | Sep 28, 2022 |
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Key People
Founding team and executive leadership
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ProtonDx Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| CARB-X | Seed |
| SBRI Healthcare | Grant |
| UK Agri-Tech Centre | Grant |
| Imperial College London | Grant |
| Innovate UK | Grant |
| NHS Accelerated Access Collaborative | Grant |
| Department for Environment, Food & Rural Affairs | Grant |
Market signals
Structured signals derived from secondary market and firmographic data.
- Aug 21, 2026
Monthly visitors increased 111% MoM.
- Dec 8, 2025
Monthly visitors grew 897% MoM, from 370 to 3.7K.
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ProtonDx Filings
Explore SEC and related filing metadata, where available.
| Type | Date | Amount Offered | Amount Sold | Filing | Pages | Download |
|---|
Filing documents are not displayed on this public page. Request access to learn about available coverage.
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Frequently Asked Questions
Common questions about ProtonDx's valuation, stock price, and market status.
Is ProtonDx a public or private company?
ProtonDx is a private company.
What is the current stock price of ProtonDx?
ProtonDx is a private company, so its shares have no public market price. Caplight tracks ProtonDx's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is ProtonDx worth (valuation)?
Valuation information for ProtonDx is not publicly available.
Can I buy ProtonDx stock?
ProtonDx shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was ProtonDx's last funding round?
ProtonDx's most recent funding round was Seed on December 4, 2025.
Who are the main investors in ProtonDx?
Key investors in ProtonDx include CARB-X, SBRI Healthcare, Innovate UK, Department for Environment, Food & Rural Affairs.
Will ProtonDx IPO soon?
No public IPO plans have been announced for ProtonDx.
How can I track ProtonDx secondary market activity?
Caplight tracks bids, offers, and trades in ProtonDx's shares on secondary markets.