Who invested in Leyden Labs

4 rounds we have observed, with the 11 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.

BiotechHealthcare

Raised 5 months ago

Funding summaryUpdated 26 Oct 2026

$221Mraised across 4 rounds since 2025, from 4 sources

$70MRound$70MRound$35MVenture$45MVenture

Latest round: Venture, $45MJun 2026
Biggest round: $70MRound · Apr 2025
Step-upi: 1.3×
Investors: 11 (2 led)

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.

20252026

$70MRound$70MRound$35MVenture$45MVenture

First round: Round, $70M
Biggest round: $70M
Usual gap between rounds: 6 months

The rounds

Jun 2026
Venture$45M3 returning
Source recorded
Oct 2025
Venture$35M1 new2 returning
Source recorded
Apr 2025
Round$70M
No investor was named in the report.
Reported by Silicon Canals
Jan 2025
Round$70M10 new
Reported by Silicon Canals

Founders and team

From Leyden Labs's own website: 4 founders, 11 on the team.

Koenraad WiedhaupFounder and Chief Executive Officer

Eli CasdinCasdin Capital, Chief Investment Officer and Founder

Ronald BrusFounder and Chief Growth Officer

Dinko ValerioFounder and Chair of the Supervisory Board

Ben VerwaayenAlcatel-Lucent, former CEO
Khoo ShihClavystBio, CEO
Onno van de StolpeGalapagos, former CEO
René RussoXilio Therapeutics, CEO
Clarissa KochChief Scientific Officer
Jintanat AnanworanichChief Medical Officer
Marieke van der LansChief Financial Officer
Susan SobolovChief Technology Officer
James ShannonNovartis, former Global Head of Development
Richard WhitleyNovartis, former Global Head of Development
Xavier MaesGeneral Counsel

AdvisersJaap Goudsmit

Who was in which round

The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.

Round2025Round2025Venture2025Venture2026

Polaris PartnersL

Qiming Venture Partners

European Investment Bank

Casdin CapitalSoftBank Vision Fund 2Bluebird Ventures

Everyone who backed them

Polaris PartnersVC firm3rounds, led 1

Qiming Venture PartnersVC firm3rounds

European Investment BankGovernment2rounds

ClavystBioVC firm1round, led 1

Google VenturesCorporate VC1round

F-Prime CapitalVC firm1round

InvusPrivate equity1round

Casdin CapitalVC firm1round

SoftBank Vision Fund 2Growth equity1round

Bluebird VenturesVC firm1round

Byers Capital / Brook ByersInvestment firm1round

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

Quick answers about Leyden Labs

Who invested in Leyden Labs?

Leyden Labs's investors include Polaris Partners, Qiming Venture Partners, European Investment Bank, ClavystBio and Google Ventures, and 6 more on record.