12080654 · Active · incorporated 7 years, 2 months ago · London
Energy CleanTech Energy Series B+
A green hydrogen and fuel cell project developer that helps organisations switch to cleaner energy.
Protium is a private limited company registered at Companies House under number 12080654, incorporated on 2 July 2019, with a registered office in London. Its current status on the register is active. Its filed nature of business covers manufacture of gas (SIC 35210), engineering design activities for industrial process and production (SIC 71121) and environmental consulting activities (SIC 74901). Sonde has indexed 83 filings for this company, including 5 funding rounds. Its most recent round closed in June 2025, raising £12.3m.
| Round | Closed | Raised | Price per share |
|---|---|---|---|
| Round 5 | Jun 2025 | £12.3m | — |
| Round 4 | Dec 2024 | £46.8m | £82.44 |
| Round 3 | May 2022 | £17.7m | — |
| Round 2 | Jul 2021 | £3.1m | £7,591.00 |
| Round 1 | May 2020 | £250k | £1,000.00 |
Showing the 12 most recent of 83 filings.
See the complete cap table with every shareholder, founder tags, dilution across 9 share allotments, round-by-round fundraising history, and the full filing timeline — parsed from official Companies House documents.
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