FirstMark Capital is an early-stage venture capital firm based in New York City, focusing on seed and Series A investments in high-growth consumer and enterprise technology sectors. Their strategy involves a focused, high-conviction investment model, backing entrepreneurs with innovative ideas, and providing extensive support and network access to their portfolio companies.
Deal activity increased 112% year-over-year (17 deals in the last 12 months). Average disclosed round size is $54.0M (across 141 rounds with reported amounts).
Portfolio
147
Fund Size
$3.5B
Top Stage
Series A
Last 12 Mo
17
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
147 investments
| Company | Round | Amount | Date |
|---|---|---|---|
| TTracebit | Series A | $20M | Mar 2026 |
 Legora | Series D | $550M | Mar 2026 |
| SSurrealDB | Series A | $23M | Feb 2026 |
 Daytona | Series A | $24M | Feb 2026 |
 Alaffia Health | Series B | $55M | Feb 2026 |
 GoodDay Software | Series A | $7M | Jan 2026 |
| GGoodDay | Unknown | — | Jan 2026 |
 Rain | Series C | $250M | Jan 2026 |
 Crisp | Series B | $26M | Dec 2025 |
 Parametrix | Series B | $27M | Dec 2025 |
 Gradium | Seed | $70M | Dec 2025 |
 Function Health | Unknown | — | Nov 2025 |
| CClerq | Series A | $21M | Oct 2025 |
 Estuary | Series A | $17M | Oct 2025 |
| TTycho AI | Series A | — | Oct 2025 |
 Highbeam | Series A | $30M | Sep 2025 |
 TensorZero | Seed | $7.3M | Aug 2025 |
| RRoon | Series A | $15M | Nov 2024 |
| AAspect Build | Seed | $3M | Oct 2024 |
 Posh | Series A | $22M | Jul 2024 |
 Momentum | Series A | $13M | Jul 2024 |
| CCaramel | Series A | $21.3M | Jul 2024 |
| SSurrealDB | Series A | $20M | Jun 2024 |
 H | Series D | $220M | May 2024 |
 Backflip | Series A | $15M | Apr 2024 |
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Top Co-Investors
Bessemer Venture Partners13 shared
Accel13 shared
Tiger Global Management11 shared
Benchmark7 shared
Accomplice7 shared
General Catalyst7 shared
GV (Google Ventures)7 shared
Index Ventures7 shared
Redpoint Ventures7 shared
Battery Ventures7 shared
Iconiq Capital7 shared
Andreessen Horowitz6 shared
First Round Capital6 shared
Georgian Partners6 shared
SignalFire6 shared
Altimeter Capital5 shared
BoxGroup5 shared
Bain Capital Ventures4 shared
Y Combinator4 shared
Sequoia Capital4 shared
Last updated: 12 April 2026