25madison
VC Fund
New York, United States
25madison is an early-stage venture platform: working with entrepreneurs to build companies from the ground up and investing in pre-seed to series A startups. The platform is comprised of 4 segments: (i) General studio: Builds companies across verticals (ii) 25m health: Builds and invests in healthtech startups in partnership with LifePointHealth (iii) Ventures fund: Invests in pre-seed to series A startups focused on B2B SaaS, fintech, and healthtech (iv) 25m create: Brand and experience agency with services including brand strategy, visual identity, experience design, and web & digital marketing
- Total investments:
- 85
- Last investment:
- Lead investor:
- 8%
Last updated:
For AI agents: llms.txt
Industries 25madison invests in
Stages 25madison invests in
Countries 25madison invests in
Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Grant Silow
|
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Justine Lee
|
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Lance West
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| See all 10 contacts → | |||
Investment Focus
Industry
- Health Care 15 (18%)
- Software 9 (11%)
- Information Technology 6 (7%)
- Food and Beverage 5 (6%)
- Artificial Intelligence 4 (5%)
Stage
- Seed 27 (32%)
- Pre-Seed 13 (15%)
- Series A 12 (14%)
- Series B 3 (4%)
- Funding Round 1 (1%)
Country
- United States 33 (39%)
- Israel 3 (4%)
- Portugal 1 (1%)
- United Arab Emirates 1 (1%)
Team
| Name | Title | Investments | Links | |
|---|---|---|---|---|
Gary Ginsberg
Co-Founder
|
Co-Founder | Total investments: 4 | Find email | |
|
Grant Silow
Managing Director
|
Managing Director | Total investments: 0 | Find email | |
|
Justine Lee
Chief Operating Officer
|
Chief Operating Officer | Total investments: 0 | Find email | |
Kirk Posmantur
Co-Founder and CMO
|
Co-Founder and CMO | Total investments: 7 | Find email | |
|
Lance West
Co-Founder
|
Co-Founder | Total investments: 0 | Find email | |
| See all 10 team members → | ||||
Investments
| Company | Description | Round | Links |
|---|---|---|---|
Ladder Health
|
Ladder Health offers virtual pediatric therapy and support for early childhood developmental delays, including speech and physical therapy. | $7M / Seed / Jun 23, 2026 | |
Century Health
|
Century Health accelerates drug development and commercialization by applying AI to real-world data. It is far too slow today to answer critical questions because the richest clinical data is locked away in silos. Our platform does the heavy lifting to rapidly get you the insight you need, all while supporting the research community and protectingpatient privacy. | $5M / Seed / May 19, 2026 | |
|
Century Health
|
Century Health accelerates drug development and commercialization by applying AI to real-world data. It is far too slow today to answer critical questions because the richest clinical data is locked away in silos. Our platform does the heavy lifting to rapidly get you the insight you need, all while supporting the research community and protectingpatient privacy. | $5M / Seed / May 19, 2026 | |
Ranger AI
|
Ranger AI helps manufacturers decrease response time to win new business, increase bid throughput. | $8.4M / Seed / May 14, 2026 | |
Miravoice
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Miravoice builds precision AI voice agents to automate phone surveys and interviews. Collect more data, faster, for less. | $6.3M / Seed / Apr 02, 2026 | |
Italic Health
|
Italic Health, Inc. is a healthcare technology company building a unified platform for managing patient data, medical billing, and insurance workflows. Its software integrates health records, appointment scheduling, and AI-driven analytics to improve care coordination, financial processes, and patient engagement. | Seed / Jan 01, 2026 | |
Silkline
|
Modern operating system for direct materials procurement. | $4M / Seed / Oct 22, 2025 | |
Ovasave
|
Ovasave is a technology platform that connects women to fertility services. | $1.2M / Pre-Seed / Jul 17, 2025 | |
Handspring Health
|
Handspring is redesigning the family mental healthcare experience from the ground up. Our omnichannel care delivery model tightly integrates different modalities of care, including in-person, digital and devices. Through the use of technology, health plan partnerships, and highly trained clinicians. Handspring Health aims to make quality mentalhealthcare more accessible to all families. | $12M / Series A / Jun 26, 2025 | |
Kouper Health
|
Kouper Health is a healthcare company that focuses on improving the patient, provider, and payor experience during transitions of care. The company leverages direct EHR integration, machine learning, and automation to empower care teams and patients. Their approach is personalized, offering support tailored to the unique needs of each patient andcare team. With a small team of dedicated professionals, Kouper Health is committed to fundamentally transforming the way care transitions are managed. | $10M / Series A / May 08, 2025 | |
| See all 85 investments → | |||
Co-Investors
Alumni Ventures
8 deals together
General Catalyst
6 deals together
2048 Ventures
4 deals together
focal
4 deals together
Gaingels
4 deals together
InnovateHealth Ventures
4 deals together
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FAQ
What does 25madison invest in?
25madison invests primarily in Health Care, Software and Information Technology startups, most often at Seed and Pre-Seed stage. Most of the 85 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
How do I contact 25madison?
Public channels for 25madison 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 25madison?
The team at 25madison includes Gary Ginsberg (Co-Founder), Grant Silow (Managing Director) and Justine Lee (Chief Operating Officer), 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 Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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