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FirstMark Capital is an early-stage venture capital firm based in New York City, investing in technology companies across enterprise software, consumer, AI/ML, fintech, healthcare, and infrastructure. Founded in 2008 as a spinoff of Pequot Ventures, the firm frequently acts as the first institutional investor and has backed companies such as Pinterest, Shopify, DraftKings, and Airbnb.
Deal activity increased 733% year-over-year (25 deals in the last 12 months). Average disclosed round size is $52.3M (across 316 rounds with reported amounts).
Portfolio
189
Fund Size
—
Top Stage
Series A
Last 12 Mo
25
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
337 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Onyx | Series B | $113M | Jul 2026 |
 Velocity | Series A | $38M | Jul 2026 |
 Tracebit | Series A | $20M | Mar 2026 |
 Legora | Series D | $550M | Mar 2026 |
 SurrealDB | Series A | $23M | Feb 2026 |
 Daytona | Series A | $24M | Feb 2026 |
 Daytona | Series A | $24M | Feb 2026 |
 Alaffia Health | Series B | $55M | Feb 2026 |
 Alaffia | Series B | $55M | Feb 2026 |
 GoodDay | Series A | $7M | Jan 2026 |
| GGoodDay Software | Seed | $7M | Jan 2026 |
 Harmattan AI | Series B | $200M | Jan 2026 |
 Rain | Series C | $250M | Jan 2026 |
 Rain Financial | Series C | $250M | Jan 2026 |
 Rain | Series C | $250M | Jan 2026 |
 Rain | Series C | $250M | Jan 2026 |
 Rain | Series C | $250M | Jan 2026 |
 Onyx | Series B | $113M | Jan 2026 |
 Velocity | Unknown | $38M | Jan 2026 |
 GoodDay | Unknown | $7M | Jan 2026 |
 Payy | Seed | $6M | Jan 2026 |
| Daytona | Series A | $24M | Jan 2026 |
 Overtone | Seed | $18M | Jan 2026 |
 Posh | Series B | $37M | Jan 2026 |
 Nebulock | Series A | $25M | Jan 2026 |
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Top Co-Investors
Bessemer Venture Partners29 shared
Accel25 shared
Gaingels21 shared
General Catalyst21 shared
Battery Ventures21 shared
Tiger Global Management, LLC21 shared
Index Ventures18 shared
First Round Capital17 shared
GV17 shared
Sequoia Capital16 shared
Insight Partners16 shared
BoxGroup15 shared
Iconiq Capital, LLC14 shared
Norwest Venture Partners14 shared
Y Combinator13 shared
SignalFire12 shared
Expa12 shared
Accomplice12 shared
Benchmark11 shared
Redpoint Ventures10 shared
Last updated: 7 October 2026