Portfolio Co Investors 2026 for Polaris Partners: investors, rounds, and co-investor patterns from StartupFundraising.com research, updated for 2026.
Polaris Partners accounts for 60 tracked companies with verified cap-table data, 60 of which disclose round sizes totalling $12B. The median disclosed raise is $123M, and the largest is Morphic Therapeutic at $3.2B, ahead of Moderna ($650M) and ReCode Therapeutics ($570M).
The names that recur most often on these co-invested cap tables are Polaris Partners (60 companies), ARCH Venture Partners (9 companies), GV (9 companies), Alexandria Venture Investments (8 companies), Vida Ventures (7 companies), Leaps by Bayer (7 companies). By latest disclosed round, the market skews Series A (20), Series B (15), Series D (7), Series C (7).
Companies tracked: 60
Disclosed funding total: $12B across 60 companies
Median disclosed raise: $123M
Largest raise: Morphic Therapeutic — $3.2B
Stage mix: Series A 20 · Series B 15 · Series D 7 · Series C 7
