# Polymateria funding: rounds and investors

> Polymateria has raised $52M across 8 rounds since 2021. Every round with its source.

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

United Kingdom · [Series B startup](https://millionrounds.com/companies)

# Who invested in *Polymateria*

8 rounds we have observed, with the 0 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

Biotech

Raised 10 months ago

Funding summary Updated 26 Oct 2026

**$52M** raised across 8 rounds since 2021, from 8 sources

**$1.2M** Round **$4.2M** Round **$938K** Round **$9.9M** Round **$25M** Series B **$5.0M** Round **$1.1M** Round **$4.9M** Round

- **Latest round:** Round, $4.9M Jan 2026
- **Biggest round:** $25M Series B · Apr 2023
- **Step-up i:** 4.3×
- **Investors:** 0

See who backed them

## The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

2022 2023 2024 2025 2026

**$1.2M** Round

**$4.2M** Round

**$938K** Round

**$9.9M** Round

**$25M** Series B

**$5.0M** Round

**$1.1M** Round

**$4.9M** Round

- **First round:** Round, $1.2M
- **Biggest round:** $25M
- **Usual gap between rounds:** 6 months

[**Polymateria** Plastics 1 / 13 Their pitch deck **Polymateria's pitch deck, 13 slides** Each slide read for what it argues, against the decks that raised at the same stage.](https://millionrounds.com/decks/polymateria)

## The rounds

- **Jan 2026** Round **$4.9M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet
- **Dec 2024** Round **$1.1M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet
- **May 2024** Round **$5.0M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet
- **Apr 2023** Series B **$25M** No investor was named in the report. Source recorded
- **Sept 2022** Round **$9.9M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet
- **May 2022** Round **$938K** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet
- **Dec 2021** Round **$4.2M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet
- **Jun 2021** Round **$1.2M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet

## Funding filed with regulators

Polymateria filed 15 raises, $35M in all. Filings say how much was sold and to how many investors; they never name the investors.

- Feb 2026 **$4.2M** UK share allotment
- Jan 2026 **$608K** UK share allotment
- Dec 2024 **$489K** UK share allotment
- Dec 2024 **$635K** UK share allotment
- Jun 2024 **$3.9M** UK share allotment
- May 2024 **$1.1M** UK share allotment
- Apr 2023 **$8.1M** UK share allotment
- Dec 2022 **$363K** UK share allotment
- Nov 2022 **$271K** UK share allotment
- Oct 2022 **$8.1M** UK share allotment
- Sept 2022 **$1.1M** UK share allotment
- May 2022 **$938K** UK share allotment
- Dec 2021 **$199K** UK share allotment
- Dec 2021 **$4.0M** UK share allotment
- Jun 2021 **$1.2M** UK share allotment

## Founders and team

From Polymateria's own website: 2 founders, 30 on the team.

**Jonathan Sieff** Founder & Board Member

**Lee Davy-Martin** Founder & Chairman

- **Richard Horne** Chief Executive Officer
- **Dr Florence Huynh** Vice President of Innovations
- **Claresta Kang** EA to CEO
- **Alex Pike** Chief Financial Officer
- **Andrew Webster** Chief Strategy Officer
- **Dr Sally Lawrence** Chief Operations Officer
- **Steven Altmann-Richer** Chief Corporate Affairs Officer
- **Adesh Jalatkar** Head of B2B Marketing
- **Aisyah Firoz** Head of Policy, Southeast Asia
- **Dr Gavin Hill** VP of Development and Compliance
- **Jovis See** Head of Sales – South East Asia
- **Paul Barker** VP of Operations
- **Sophie Stromback** Head of Strategy and Communications
- **Deepti Gupta** Growth & Partnership Director – India
- **Denis Khomyakov** New Business Development Director
- **Dr Giovanni Santagiuliana** Senior Research Scientist
- **Dr Sumanta Banerjee** Research Scientist: Masterbatch Development
- **Ela Roy** Graphic Designer & Content Strategist

And 12 more on the team.

## Also claim to have backed them

These 2 firms list Polymateria as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.

[Bridford Group](https://millionrounds.com/fund/bridford-group) VC firm Per its own site

[ABC Impact](https://millionrounds.com/fund/abcimpact) Private equity Per its own site

## Quick answers about Polymateria

### How much has Polymateria raised?

Polymateria has raised $52M across 8 rounds since 2021.

### When did Polymateria last raise?

Polymateria's most recent round, $4.9M, was in Jan 2026.

### What was Polymateria's biggest round?

Polymateria's largest round on record is $25M (Series B), in Apr 2023.

### What stage is Polymateria at?

Polymateria's latest named round is a Series B, in Apr 2023.

### Where is Polymateria based?

Polymateria is based in the United Kingdom.

## Companies like Polymateria

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

[**HydRegen** $12M · Oct 2026](https://millionrounds.com/company/hydregen)[**OMass Therapeutics** $442M · Oct 2026](https://millionrounds.com/company/omass-therapeutics)[**CMR Surgical** $1.1B · Oct 2026](https://millionrounds.com/company/cmr-surgical)[**Living Optics** $61M · Oct 2026](https://millionrounds.com/company/living-optics)[**Bactobio** $18M · Oct 2026](https://millionrounds.com/company/bactobio)[**RHYTHM AI** $23M · Sept 2026](https://millionrounds.com/company/rhythm-ai)

## Find investors like these

Search every investor by what they have actually funded, then narrow to your stage and market. Free.

Open the investor searchOr these rounds in the app