FirstMark

firstmark.com ↗Activity from announced rounds

Activity in this selectionUnited States · Oct 14, 2026 · Jul 17, 2026

An early-stage venture capital firm in New York, with recorded activity across enterprise software, infrastructure and fintech.

Investment focus

FirstMark is a New York-based early-stage venture capital firm. Its official portfolio covers areas including enterprise software, data infrastructure, fintech, healthcare and consumer technology. The firm also builds networks connecting founders with operators and the wider technology community.

Activity recorded on RoundOS

RoundOS records include Liquid Compute, Rillet, Onyx Security, Tracebit and SurrealDB. The published announcements show participation in compute-market infrastructure, accounting software, security and databases. This is a selection of recorded financings, rather than a complete account of FirstMark’s investments.

Sources
Rounds participated in
3
Confirmed lead rounds
1
2 roles undisclosed
New companies
3
First participation on record · 0 follow-on
Funding in participating rounds
$228M
3 disclosed · full round size, not this investor’s share

By stage

Seed1
Series B1
Series C+1

By primary sector

AI1
Cybersecurity1
Fintech1

By country

United States3

Rounds

3 in this selection
Liquid Compute

Liquid Compute is building a market for GPU capacity that connects AI compute buyers, data centers, neoclouds and traders through a physical order book, standardized verification, clearing and settlement; it is onboarding participants while its planned derivatives exchange remains pending CFTC designation and registration.

$15MSeed
Lead
Rillet

AI-native ERP platform where finance teams and AI agents run accounting together

$100MSeries C
Role not disclosed
Onyx Security

Secure AI control plane for the enterprise.

$113MSeries B
Role not disclosed