Samsara BioCapital Portfolio 2026

Samsara Biocapital accounts for 3 tracked companies with verified cap-table data, 3 of which disclose round sizes totalling $407M. The median disclosed raise is $61M, and the largest is FogPharma at $323M, ahead of MiroBio ($61M) and Primmune Therapeutics ($23M).

The names that recur most often on these portfolio cap tables are Samsara Biocapital (3 companies), ARCH Venture Partners (1 company), Milky Way Investments (1 company), Fidelity Management & Research Company (1 company), Nextech Invest (1 company), RA Capital Management (1 company). By latest disclosed round, the market skews Series D (1), Series A (1), Series B (1).

• Companies tracked: 3
• Disclosed funding total: $407M across 3 companies
• Median disclosed raise: $61M
• Largest raise: FogPharma — $323M
• Stage mix: Series D 1 · Series A 1 · Series B 1
• Most recent dated round: 2026-01-26

Best funded Samsara Biocapital companies

1. FogPharma — $323M (latest: Series D)
2. MiroBio — $61M (latest: Series A)
3. Primmune Therapeutics — $23M (latest: Series B)

Samsara Biocapital — related firms and companies (47)

• FogPharma
• MiroBio
• Primmune Therapeutics
• Samsara Biocapital co-investors 2026
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