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 summaryUpdated 26 Oct 2026

$52Mraised across 8 rounds since 2021, from 8 sources

$1.2MRound$4.2MRound$938KRound$9.9MRound$25MSeries B$5.0MRound$1.1MRound$4.9MRound

Latest round: Round, $4.9MJan 2026
Biggest round: $25MSeries B · Apr 2023
Step-upi: 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.

20222023202420252026

$1.2MRound$4.2MRound$938KRound$9.9MRound$25MSeries B$5.0MRound$1.1MRound$4.9MRound

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

PolymateriaPlastics1 / 13Their pitch deckPolymateria's pitch deck, 13 slidesEach slide read for what it argues, against the decks that raised at the same stage.

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$4.2MUK share allotment
Jan 2026$608KUK share allotment
Dec 2024$489KUK share allotment
Dec 2024$635KUK share allotment
Jun 2024$3.9MUK share allotment
May 2024$1.1MUK share allotment
Apr 2023$8.1MUK share allotment
Dec 2022$363KUK share allotment
Nov 2022$271KUK share allotment
Oct 2022$8.1MUK share allotment
Sept 2022$1.1MUK share allotment
May 2022$938KUK share allotment
Dec 2021$199KUK share allotment
Dec 2021$4.0MUK share allotment
Jun 2021$1.2MUK share allotment

Founders and team

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

Jonathan SieffFounder & Board Member

Lee Davy-MartinFounder & Chairman

Richard HorneChief Executive Officer
Dr Florence HuynhVice President of Innovations
Claresta KangEA to CEO
Alex PikeChief Financial Officer
Andrew WebsterChief Strategy Officer
Dr Sally LawrenceChief Operations Officer
Steven Altmann-RicherChief Corporate Affairs Officer
Adesh JalatkarHead of B2B Marketing
Aisyah FirozHead of Policy, Southeast Asia
Dr Gavin HillVP of Development and Compliance
Jovis SeeHead of Sales – South East Asia
Paul BarkerVP of Operations
Sophie StrombackHead of Strategy and Communications
Deepti GuptaGrowth & Partnership Director – India
Denis KhomyakovNew Business Development Director
Dr Giovanni SantagiulianaSenior Research Scientist
Dr Sumanta BanerjeeResearch Scientist: Masterbatch Development
Ela RoyGraphic 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.