# Hephaestus funding rounds and investors

As of 22 Oct 2026, Hephaestus has raised $17.2M across 1 verified round on record; latest: $17.2M funding round led by CiRi Ventures, announced 21 Oct 2026.

A provider of high temperature superconducting (HTS) magnets and negative triangularity fusion energy technology

Website: https://www.hephaestus.energy/  
Headquarters: London, UK  
Page: https://fireround.dev/companies/hephaestus.energy

## Verified rounds

| Announced | Round | Amount | Lead investors | Other investors | Sources |
| --- | --- | --- | --- | --- | --- |
| 2026-10-21 | Funding round | $17.2M | CiRi Ventures | Climate Capital, Prescience Ventures, Teampact Ventures, Unruly Capital | [citybiz.co](https://www.citybiz.co/article/922579/hephaestus-raises-17-2-million-to-develop-fusion-technology-and-superconducting-magnets), [finsmes.com](https://www.finsmes.com/2026/10/hephaestus-raises-17-2m-in-funding.html) |

Source: Fireround (https://fireround.dev), an open-source funding feed. Each round is checked against the pages listed with it.