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Turnstone Biologics

San Diego, California, United Statesturnstonebio.gcs-web.com ↗

Ownership: Public · TSBX
Employees: ~14
Development stage: Phase 1

Overview

Initial data from the STARLING trial showed durable anti-tumor activity in heavily pre-treated microsatellite stable colorectal cancer patients—including a complete response with progression-free survival beyond one year. However, due to capital constraints and manufacturing challenges for its lead program (TIDAL‑01), all clinical development was discontinued in February 2025.

Therapeutic areas: Oncology
Modalities: Tumor-infiltrating lymphocytes (TILs) cell therapyViral immunotherapy platforms
Industry: Biotech

Drug pipeline

13 assets

mg1-magea3

12 more assets in the full pipeline.

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Partnerships

Moffitt Cancer Center – investigator-sponsored trials on selected-TIL therapies for melanoma indications

Financials

Market cap: $8.2M
Total revenue: $0
Enterprise value: $-8.1M

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