Portfolio Co Investors 2026 for Atomico: investors, rounds, and co-investor patterns from StartupFundraising.com research, updated for 2026.
Atomico accounts for 46 tracked companies with verified cap-table data, 46 of which disclose round sizes totalling $10B. The median disclosed raise is $77M, and the largest is MessageBird at $1.8B, ahead of PsiQuantum ($1.7B) and Jobandtalent ($1B).
The names that recur most often on these co-invested cap tables are Atomico (46 companies), Y Combinator (6 companies), General Catalyst (5 companies), Index Ventures (4 companies), Accel (3 companies), Kinnevik (3 companies). By latest disclosed round, the market skews Series B (18), Series A (9), Series C (8), Series D (3).
Companies tracked: 46
Disclosed funding total: $10B across 46 companies
Median disclosed raise: $77M
Largest raise: MessageBird — $1.8B
Stage mix: Series B 18 · Series A 9 · Series C 8 · Series D 3
