United Kingdom · Pre-seed startup

Who invested in AmpliSi

One round we have observed, with the 2 investors named in it. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

Chemicals & MaterialsEnergy

Raised 8 months ago

Funding summaryUpdated 26 Oct 2026

$2.7Mraised across 1 round since 2026, from 2 sources

Latest round
Pre-seed, $2.7MMar 2026
Led by
Northern Gritstone and Clean Growth Fund
Investors
2 (2 led)
See who backed them

The rounds

  1. Mar 2026
    Pre-seed$2.7M

    Reported by Firms' own news pages and 1 other

Founders and team

From AmpliSi's own website: 2 founders.

Dr. Ruth SayersCo-Founder & Chief Executive Officer
Dr. Gwen ChimonidesCo-Founder & Chief Technology Officer

AdvisersProf. Siddharth Patwardhan

Everyone who backed them

Northern GritstoneVC firm1round, led 1
Clean Growth FundVC firm1round, led 1

Missing a round, or an investor who was in one? Tell us.

Also claim to have backed them

This firm lists AmpliSi as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.

Deeptech LabsAcceleratorPer its own site

Quick answers about AmpliSi

Who invested in AmpliSi?

AmpliSi's investors include Northern Gritstone and Clean Growth Fund. Northern Gritstone led its latest round.

How much has AmpliSi raised?

AmpliSi has raised $2.7M across 1 round since 2026.

When did AmpliSi last raise?

AmpliSi's most recent round was a Pre-seed of $2.7M in Mar 2026, led by Northern Gritstone.

What was AmpliSi's biggest round?

Its most recent round, $2.7M in Mar 2026, is also its largest on record.

Who backed AmpliSi first?

AmpliSi's first round on record, in Mar 2026, was backed by Northern Gritstone and Clean Growth Fund.

What stage is AmpliSi at?

AmpliSi's latest named round is a Pre-seed, in Mar 2026.

Where is AmpliSi based?

AmpliSi is based in the United Kingdom.

Who led AmpliSi's rounds?

Northern Gritstone led the Pre-seed in 2026.

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