FirstMark
VC Fund
New York, United States
FirstMark is an early-stage venture capital firm based in New York City, backing exceptional founders making their mark on the world. FirstMark has proudly invested in founders of remarkable businesses like Pinterest, Shopify, DraftKings, Discord, Airbnb, Stubhub, Riot Games, and dozens more.
- Total investments:
- 460
- Last investment:
- Lead investor:
- 37%
- Fund size:
- $500M
- Last fund:
Last updated:
For AI agents: llms.txt
Industries FirstMark invests in
Stages FirstMark invests in
Countries FirstMark invests in
Round sizes
Contacts
| Name | Phone | Socials | |
|---|---|---|---|
| See all 10 contacts → | |||
Round size
- Seed
- $1.1M–$8M
- Series A
- $4M–$22M
- Series B
- $7M–$55M
Investment Focus
Industry
- Software 65 (14%)
- Artificial Intelligence 37 (8%)
- SaaS 36 (8%)
- Information Technology 27 (6%)
- Analytics 23 (5%)
Stage
- Series A 126 (27%)
- Series B 77 (17%)
- Seed 72 (16%)
- Series C 48 (10%)
- Series D 27 (6%)
Country
- United States 181 (39%)
- France 5 (1%)
- United Kingdom 5 (1%)
- Canada 4 (1%)
- Brazil 2 (0%)
Team
| Name | Title | Investments | Links | |
|---|---|---|---|---|
Adam Nelson
Managing Director
|
Managing Director | Total investments: 31 | Find email | |
Amish Jani
Founder and Partner
|
Founder and Partner | Total investments: 140 | Find email | |
Catherine Ulrich
Venture Partner
|
Venture Partner | Total investments: 2 | Find email | |
Daniel Gaisin
Vice President of Finance
|
Vice President of Finance | Total investments: 0 | Find email | |
Lisa Xu
Principal
|
Principal | Total investments: 5 | Find email | |
| See all 10 team members → | ||||
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Rillet is an AI-native ERP that automates accounting for complex revenue models, allowing for fast book closings and providing a reliable source of truth. The solution covers the full spectrum of accounting and finance needs, including customer invoicing, GAAP-compliant revenue recognition, automated bank reconciliations, accrual-based expenserecognition, real-time SaaS metrics, and other analytics capabilities. Rillet covers multiple entities, geographies, and currencies and allows for consolidated multi-currency reportin,g all embedded within one platform. | $100M / Series C / Aug 17, 2026 | ||
| Gravie is a health benefits platform that offers insurance services. Their software products include Comfort and Ichra. Gravie designed health benefits to help employers control costs. They take a defined contribution approach, to employers set a fixed budget each year. | $50M / Private Equity / Jul 30, 2026 | ||
| Onyx Security enables organizations via a holistic platform to adopt AI and AI agents with confidence - without compromising security. | $113M / Series B / Jul 29, 2026 | ||
| Henry is a software company that develops AI-powered workflow automation tools for commercial real estate professionals. Its platform automates underwriting, market research, comparable property analysis, transaction tracking, buyer identification, and pitch deck creation. The platform also builds and maintains proprietary property and transactiondatabases, generates Excel-based underwriting models, and integrates with existing workflows to support investment sales, acquisitions, and brokerage teams throughout the deal process. | $16.5M / Series A / Jul 29, 2026 | ||
| Velocity provides a unified platform for efficiently moving and managing funds across both traditional banks and blockchains. | $38M / Series A / Jul 14, 2026 | ||
| Overtone dating app uses AI and voice tools to create more personal, thoughtful connections. | $18M / Seed / Jul 14, 2026 | ||
| Vendelux is the leading Event Intelligence Platform that helps marketers make more data-driven decisions around event attendance, sponsorship, and hosting. Customers match CRM data against a proprietary database of over 30,000 events, including speaker, sponsor, and attendee information, to easily find their prospects, customers, and competitorseverywhere they are going to be. | $50M / Series B / Jul 08, 2026 | ||
| Nebulock operates as an AI-driven threat hunting platform that continuously hunts across your security stack to surface false negatives and translate hunts. | $25M / Series A / Jun 25, 2026 | ||
| Payy is a fintech application that enables stablecoin transactions, seamless payments, cryptocurrency wallets, and exchange services. | $6M / Seed / Mar 25, 2026 | ||
| Posh is a social platform designed for creating and discovering real-life experiences, ranging from club parties to music festivals. Curated by design and built for impact, Posh gives organizers and attendees the tools to create, discover, and amplify the experiences that define their scene. From intimate activities to large-scale events, we powerreal-world connections through seamless ticketing and event discovery. | $37M / Series B / Mar 19, 2026 | ||
| See all 460 investments → | |||
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FAQ
What does FirstMark invest in?
FirstMark invests primarily in Software, Artificial Intelligence and SaaS startups, most often at Series A and Series B stage. Most of the 460 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is FirstMark's check size?
FirstMark typically joins rounds of $1.1M–$8M at Seed, $4M–$22M at Series A and $7M–$55M at Series B. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds FirstMark participates in.
How do I contact FirstMark?
Public channels for FirstMark include LinkedIn, X (Twitter) and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
Who are the partners at FirstMark?
The team at FirstMark includes Adam Nelson (Managing Director), Amish Jani (Founder and Partner) and Catherine Ulrich (Venture Partner), among 10 team members tracked by Shizune. The Team section lists each member with their title, investment count and links.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Sep 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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