How much has Estuary Biotherapeutics raised?

Estuary Biotherapeutics has raised $103M in one sourced round on record (Series A), announced October 16, 2026.

Who invested in Estuary Biotherapeutics?

Investors on record for Estuary Biotherapeutics: 4BIO Capital, Biogen New Ventures, Deep Track Capital, GV, National Kidney Foundation, Pivotal bioVenture Partners, RA Capital Management and UPMC Enterprises. RA Capital Management led its latest sourced round.

Who founded Estuary Biotherapeutics?

Estuary Biotherapeutics was founded by Wayne Sackett.

Where is Estuary Biotherapeutics based?

Estuary Biotherapeutics is based in San Francisco, United States.

Estuary Biotherapeutics

Estuary Biotherapeutics is a biotechnology company developing genetic medicines for serious kidney diseases.

Health and bio

Latest funding

$103M Series A · October 16, 2026

Led by RA Capital Management · Source: estuarybio.com

Funding history ↓

Website: estuarybio.com.

LinkedIn: linkedin.com.

Category: Health and bio.

Sectors: Biotechnology, Health Care, Life Science, Medical.

Stage: Series A.

Based in: San Francisco, United States.

Last round: Oct 16, 2026 · 7 days ago.

Headcount: 11–50 employees.

Domain age: 3 years.

On Recent Funding since: Oct 17, 2026.

About Estuary Biotherapeutics

Estuary Biotherapeutics is a company based in San Francisco, United States. Recent Funding lists it under Health and bio. It raised $103M in a Series A round in October 2026, led by RA Capital Management, according to estuarybio.com. Investors on record include 4BIO Capital, Biogen New Ventures, Deep Track Capital, GV and 3 others. It was founded by Wayne Sackett.

Funding rounds

October 16, 2026
Series A · $103M
RRA Capital Management (lead), 44BIO Capital, BBiogen New Ventures, DDeep Track Capital, GGV, NNational Kidney Foundation, PPivotal bioVenture Partners, UUPMC Enterprises
Source: estuarybio.com
December 26, 2022
Website created

Founders and team

WS
Wayne Sackett Founder

Investors

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Questions and sources

Estuary Biotherapeutics: questions and answers

How much has Estuary Biotherapeutics raised?: Estuary Biotherapeutics has raised $103M in one sourced round on record (Series A), announced October 16, 2026.
Who invested in Estuary Biotherapeutics?: Investors on record for Estuary Biotherapeutics: 4BIO Capital, Biogen New Ventures, Deep Track Capital, GV, National Kidney Foundation, Pivotal bioVenture Partners, RA Capital Management and UPMC Enterprises. RA Capital Management led its latest sourced round.
Who founded Estuary Biotherapeutics?: Estuary Biotherapeutics was founded by Wayne Sackett.
Where is Estuary Biotherapeutics based?: Estuary Biotherapeutics is based in San Francisco, United States.

Every amount links to the page it came from. * Estimated from an accelerator's published standard deal, not a company-specific disclosure. How Recent Funding sources and verifies funding data. The same data as JSON: /api/v1/companies/estuary-biotherapeutics (get a free API key).