FirstMark Capital
About FirstMark Capital
Rick Heitzmann and Amish Jani founded FirstMark in 2008 as a spinoff from Pequot Capital Management. Crunchbase also lists Lawrence Lenihan and Gerald Poch as co-founders. Some profiles give 2005 as the founding year. Wikipedia reports that the firm has raised 10 funds, with $3.5B in committed capital as of 2024. Those funds include dedicated early-stage and growth vehicles. In July 2022 FirstMark announced FirstMark Capital VI and Opportunity Fund IV, with about $1.1B in commitments combined. In 2016 the WSJ reported that the firm raised $480M for two new funds. As of 2024 Wikipedia lists four investing partners: Rick Heitzmann, Amish Jani, Matt Turck and Adam Nelson. Matt Turck is the partner most visible in AI and data. He led the Daytona deal and joined its board.
FirstMark is often the first institutional investor in a company and often leads the round. Its public AI work centres on infrastructure for agents. In February 2026 it led Daytona's $24M Series A. The other investors in that round were Pace Capital, Upfront Ventures, E2VC, Datadog and Figma Ventures. Daytona makes stateful, forkable computing environments for AI agents. On the Lounge deals desk, FirstMark led Liquid Compute's $15M Seed (September 2026) and Fragment's $12M Series A (October 2026). It also took part in Overtone's $18M Seed (July 2026) and H Company's $220M Seed (May 2024). Crunchbase does not mark FirstMark as lead on the H Company round.
FirstMark says it invests at Seed and Series A. Third-party databases add Pre-Seed and Series B in some cases. The firm does not publish a check size. Aggregators report different ranges. Superscout and F4 give $250K to $10M. Startupintros gives $100K to $10M. Visible gives $500K to $15M. Treat these as estimates. The firm focuses on North America and Europe, according to Superscout.
- Daytona: programmable computers for AI agents; $24M Series A led by FirstMark, February 2026.
- Liquid Compute: $15M Seed led by FirstMark, September 2026.
- Fragment: $12M Series A led by FirstMark, October 2026.
- Overtone: $18M Seed, July 2026.
- H Company: $220M Seed, May 2024.
- Hyperscience: FirstMark AI portfolio company; round details not confirmed.
- en.wikipedia.org/wiki/FirstMark_Capital
- crunchbase.com/organization/firstmark-capital
- firstmark.com/story/announcing-our-investment-in-daytona
- pulse2.com/daytona-24-million-series-a
- parsers.vc/fund/firstmarkcap.com
- superscout.co/investor/firstmark
- f4.fund/firms/firstmark
- startupintros.com/orgs/firstmark-capital
Investing activity
FirstMark Capital appears in 5 AI deals tracked by the AI Lounge deals desk, rounds totalling $325M, and led 3 of them. The rounds are mostly Seed, Series B and Series A, with a median round size of $18M and the largest at $220M. The most recent are Daytona (Series B, $60M, Oct 2026), Fragment (Series A, $12M, Oct 2026) and Liquid Compute (Seed, $15M, Sep 2026).
FirstMark Capital most often invests alongside Tobi Lütke, Brendan Foody, Adam D'Angelo and Olivier Pomel, and the companies it backs on AI Lounge are mostly in AI, AI agent cloud infrastructure and Fintech infrastructure for AI companies.
Deals
Frequently asked questions about FirstMark Capital
Who founded FirstMark Capital?
Rick Heitzmann and Amish Jani founded FirstMark in 2008 in New York, after leaving Pequot Capital Management. Crunchbase also lists Lawrence Lenihan and Gerald Poch as founders.
Who are FirstMark's partners for AI startups?
Matt Turck is the partner tied most closely to AI and data. He led the Daytona Series A and sits on its board. Wikipedia lists Rick Heitzmann, Amish Jani and Adam Nelson as the other investing partners as of 2024.
How much money has FirstMark raised?
Wikipedia reports 10 funds and $3.5B in committed capital as of 2024. The most recent fund announcement found is FirstMark VI and Opportunity Fund IV in July 2022, with about $1.1B in commitments combined.
What check size does FirstMark write for AI startups?
FirstMark does not publish check sizes. Third-party databases estimate $250K to $10M, and one lists $500K to $15M.
Does FirstMark lead AI rounds?
Often, yes. It led Daytona's Series A, Liquid Compute's Seed and Fragment's Series A. It took part without leading in Overtone and H Company.
What AI companies has FirstMark Capital invested in?
FirstMark Capital's AI investments include Daytona, Fragment, Liquid Compute, Overtone and H Company. The 5 rounds on AI Lounge are listed on this page with amounts, dates and co-investors.
Where is FirstMark Capital based?
FirstMark Capital is based in New York, New York, United States.
What stage does FirstMark Capital invest at?
In the rounds tracked on AI Lounge, FirstMark Capital has invested at Seed, Series B and Series A, with a median round of $18M. FirstMark Capital led 3 of those rounds.
Who does FirstMark Capital co-invest with?
FirstMark Capital's most frequent co-investors on AI Lounge are Tobi Lütke (1 deal), Brendan Foody (1 deal), Adam D'Angelo (1 deal), Olivier Pomel (1 deal) and Samsung Next (1 deal).
How can founders reach FirstMark Capital?
Founders on AI Lounge can see FirstMark Capital's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with the firm under Warm Paths, and add FirstMark Capital to their Investor Pipeline to track the conversation.