# Callosum funding rounds and investors

As of 14 Oct 2026, Callosum has raised $100M across 1 verified round on record; latest: $100M seed round led by Atomico, announced 20 Aug 2026.

Callosum - Co-evolving chips & intelligence

Website: https://callosum.com  
Headquarters: London  
Page: https://fireround.dev/companies/callosum.com

## Verified rounds

| Announced | Round | Amount | Lead investors | Other investors | Sources |
| --- | --- | --- | --- | --- | --- |
| 2026-08-20 | Seed | $100M | Atomico | DCVC, Plural, UK Sovereign AI Fund | [callosum.com](https://www.callosum.com/blog/seed-round), [eu-startups.com](https://www.eu-startups.com/2026/08/london-based-callosum-raises-e85-4-million-in-atomico-led-seed-round-to-unify-ai-models-and-chips) |

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