Portfolio Co Investors 2026 for M12: investors, rounds, and co-investor patterns from StartupFundraising.com research, updated for 2026.
M12 accounts for 42 tracked companies with verified cap-table data, 42 of which disclose round sizes totalling $6.7B. The median disclosed raise is $75M, and the largest is PsiQuantum at $1.7B, ahead of Innovaccer ($675M) and 275 Funding ($450M).
The names that recur most often on these co-invested cap tables are M12 (42 companies), Lightspeed Venture Partners (5 companies), Y Combinator (5 companies), Insight Partners (3 companies), Vertex Ventures (3 companies), Accel (3 companies). By latest disclosed round, the market skews Series B (13), Series C (7), Series A (7), Series D (7).
Companies tracked: 42
Disclosed funding total: $6.7B across 42 companies
Median disclosed raise: $75M
Largest raise: PsiQuantum — $1.7B
Stage mix: Series B 13 · Series C 7 · Series A 7 · Series D 7
