# AmpliSi funding: rounds and investors

> AmpliSi has raised $2.7M across 1 round since 2026. Investors include Northern Gritstone and Clean Growth Fund. Every round with its source.

Source: https://millionrounds.com/company/amplisi (Millionrounds; every figure on the page links to its filing or article)

United Kingdom · [Pre-seed startup](https://millionrounds.com/companies)

# 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 & Materials Energy

Raised 8 months ago

Funding summary Updated 26 Oct 2026

**$2.7M** raised across 1 round since 2026, from 2 sources

- **Latest round:** Pre-seed, $2.7M Mar 2026
- **Led by:** Northern Gritstone and Clean Growth Fund
- **Investors:** 2 (2 led)

See who backed them

## The rounds

- **Mar 2026** Pre-seed **$2.7M** [Northern Gritstone](https://millionrounds.com/fund/northern-gritstone) Lead [Clean Growth Fund](https://millionrounds.com/fund/clean-growth-fund) Lead Reported by Firms' own news pages and 1 other

## Founders and team

From AmpliSi's own website: 2 founders.

**Dr. Ruth Sayers** Co-Founder & Chief Executive Officer

**Dr. Gwen Chimonides** Co-Founder & Chief Technology Officer

Advisers *Prof. Siddharth Patwardhan*

## Everyone who backed them

[Northern Gritstone](https://millionrounds.com/fund/northern-gritstone) VC firm **1** round, led 1

[Clean Growth Fund](https://millionrounds.com/fund/clean-growth-fund) VC firm **1** round, led 1

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=amplisi).

## 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 Labs](https://millionrounds.com/fund/deeptech-labs) Accelerator Per 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.

## Companies like AmpliSi

In the same sector, and raised in the last eighteen months.

[**Adaptavate** $15M · Oct 2026](https://millionrounds.com/company/adaptavate)[**novosound** $8.7M · Sept 2026](https://millionrounds.com/company/novosound)[**Dragonfly Advanced Materials** $2.0M · Sept 2026](https://millionrounds.com/company/dragonfly-advanced-materials)[**Metris Energy** $7.5M · Sept 2026](https://millionrounds.com/company/metris-energy)[**Eterna Regeneratives** $4.0M · Sept 2026](https://millionrounds.com/company/eterna-regeneratives)[**AcouBatt** $3.0M · Sept 2026](https://millionrounds.com/company/acoubatt)

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