Ajax Health is a global investment firm that partners with industry leaders to build and scale high-quality healthcare businesses, with a focus on medical technology, healthcare IT, and healthcare services. The firm has raised successive $100 million funds (Ajax I, II, and 3), with its latest fund, Ajax 3, closing at $100 million; the fund_size_usd field reflects the size of this latest individual fund, not total capital raised across all funds.
33% of their portfolio is in Healthcare. Average disclosed round size is $41.1M (across 12 rounds with reported amounts).
Portfolio
8
Fund Size
$100M
Top Stage
Series A
Last 12 Mo
0
Team
Joe Koblish
Operating Partner
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
12 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 XII Medical | Series B | $45M | Aug 2024 |
 UroMems | Series C | $47M | Jun 2024 |
 Cortica | Growth | $75M | Apr 2023 |
| Cortica | Series D | $75M | Apr 2023 |
| CCortica Care | Unknown | $75M | Jan 2023 |
| XII Medical | Series A | $30M | May 2022 |
| Cortica | Series C | $60M | Jan 2021 |
| PProtaryx | Series A | $5.1M | Jan 2020 |
 Verix Health | Series A | $8M | Oct 2019 |
| EEP Map System | Series A | $25M | Oct 2019 |
 Advanced Cardiac Therapeutics, Inc. | Unknown | $45M | — |
| PProtaryx | Seed | $3.2M | — |
Top Co-Investors
Aperture Venture Partners7 shared
Longitude Capital4 shared
.406 Ventures4 shared
RA Capital Management4 shared
Optum Ventures3 shared
Deerfield3 shared
JobsOhio2 shared
Broadview Ventures2 shared
Cleveland Clinic2 shared
W Health Ventures1 shared
Quiet Capital1 shared
Undisclosed Angel Investors1 shared
CincyTech1 shared
Western Technology Investment1 shared
Keiretsu Forum1 shared
New Enterprise Associates1 shared
Bpifrance1 shared
Wellington Management1 shared
Supernova Invest1 shared
Last updated: 20 October 2026