Rubicon Founders is an entrepreneurial healthcare investment firm based in Nashville, focused on building and growing transformational healthcare companies through buyout and growth investments across the United States.
60% of their portfolio is in Healthcare. Deal activity increased 400% year-over-year (5 deals in the last 12 months). Their most common stage is series-a (40% of deals). Average disclosed round size is $82.7M (across 9 rounds with reported amounts).
Portfolio
9
Fund Size
$1.2B
Top Stage
Series A
Last 12 Mo
5
Team
Alex Sozdatelev
Operating Partner
Arjun Aggarwal
Operating Partner
Asif Dhanani
Partner
Matt Kim
Partner
Portfolio Breakdown
Stage Distribution
Investment Activity
DealsAvg Round Size
Portfolio
10 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Honest Health | Growth | $140M | Feb 2026 |
| HHonest Health | Unknown | $140M | Feb 2026 |
| AAtlas Oncology Partners | Series A | $28M | Feb 2026 |
| AAtlas Oncology | Series A | $28M | Feb 2026 |
 Imagine Pediatrics | Series B | $67M | Sep 2025 |
 Harmonycares | Series D | $200M | Jul 2024 |
 Pomelo Care | Series B | $46M | Jun 2024 |
| Pomelo Care | Series A | — | Jun 2023 |
 Atlas Oncology Partners | Series A | $28M | — |
| IImagine Pediatrics | Series B | $67M | — |
Top Co-Investors
Oak HC/FT5 shared
K2 HealthVentures3 shared
Flare Capital Partners3 shared
Operator Partners2 shared
First Round Capital2 shared
BoxGroup2 shared
SV Angel2 shared
Durable Capital Partners2 shared
Welsh, Carson, Anderson & Stowe2 shared
Optum Ventures2 shared
Stripes1 shared
Founders Fund1 shared
HLM Investment Partners1 shared
General Catalyst1 shared
Valtruis1 shared
McKesson Ventures1 shared
Allen & Company LLC1 shared
NewSpring1 shared
Last updated: 8 September 2026