# Estuary Biotherapeutics

> Preclinical, locally delivered gene therapies for inherited kidney disease.

## Why it is interesting

A large specialist-backed Series A commitment supports a kidney-delivery platform. The important investment milestones are clinical authorization, reproducible local delivery and human safety and activity—not preclinical disease-reversal claims alone.

## Profile

- **Latest funding:** Series A — committed financing announced; disbursement not specified — $93 million (October 16, 2026)
- **Latest known valuation:** Not publicly disclosed
- **Total disclosed equity funding:** $103M
- **Stage:** series-a
- **Status:** private
- **Industries:** biotech-life-sciences
- **Coverage:** full
- **Last updated:** 2026-10-17
- **Latest funding investors:** RA Capital Management, Deep Track Capital, Biogen New Ventures, UPMC Enterprises, Pivotal bioVenture Partners, National Kidney Foundation Innovation Fund, 4BIO Capital, GV, Unnamed ADPKD-connected family office

## Funding history

- Series A — committed financing announced; disbursement not specified · $93 million · October 16, 2026
  Source: https://estuarybio.com/news/estuary-series-a
- Prior seed — disclosed at October 2026 launch; exact close date not stated · $10 million
  Source: https://estuarybio.com/news/estuary-series-a

## Investors in our directory

- https://venturecapitaltracker.com/fund/ra-capital-management
- https://venturecapitaltracker.com/fund/deep-track-capital
- https://venturecapitaltracker.com/fund/biogen-new-ventures
- https://venturecapitaltracker.com/fund/upmc-enterprises
- https://venturecapitaltracker.com/fund/pivotal-bioventure-partners
- https://venturecapitaltracker.com/fund/national-kidney-foundation-innovation-fund
- https://venturecapitaltracker.com/fund/4bio-capital
- https://venturecapitaltracker.com/fund/gv

## Related articles

- https://venturecapitaltracker.com/estuary-biotherapeutics-93m-series-a-103m-committed-kidney-gene-therapy

**By:** [Venture Capital Tracker](https://venturecapitaltracker.com/editorial-policy)
**Last updated:** October 17, 2026

**Editorial note:** AI tools assisted with research, structure, or drafting. Venture Capital Tracker retains human editorial responsibility for factual accuracy, relevance, and source quality before publication.

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Source: https://venturecapitaltracker.com/startup/estuary-biotherapeutics