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.
77% of their portfolio is in Healthcare. Deal activity increased 150% year-over-year (5 deals in the last 12 months). Average disclosed round size is $75.5M (across 12 rounds with reported amounts).
Portfolio
10
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
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
13 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Honest Health | Growth | $140M | Feb 2026 |
 Honest Health | Unknown | $140M | Feb 2026 |
 Atlas Oncology Partners | Series A | $28M | Feb 2026 |
| AAtlas Oncology Partners | Series A | $28M | Feb 2026 |
| AAtlas Oncology | Series A | $28M | Feb 2026 |
 Imagine Pediatrics | Series B | $67M | Sep 2025 |
 Imagine Pediatrics | Series B | $67M | Sep 2025 |
| Imagine Pediatrics | Unknown | $67M | Jan 2025 |
| Imagine Pediatrics | Unknown | $67M | Jan 2025 |
 HarmonyCares | Series D | $200M | Jul 2024 |
 Pomelo Care | Series B | $46M | Jun 2024 |
| Pomelo Care | Series A | — | Jun 2023 |
 Atlas | Series A | $28M | — |
Top Co-Investors
Oak HC/FT7 shared
Optum Ventures4 shared
Flare Capital Partners4 shared
K2 HealthVentures3 shared
Operator Partners2 shared
First Round Capital2 shared
BoxGroup2 shared
SV Angel2 shared
Durable Capital Partners2 shared
Welsh, Carson, Anderson & Stowe2 shared
NewSpring2 shared
Stripes1 shared
Founders Fund1 shared
HLM Investment Partners1 shared
General Catalyst1 shared
Valtruis1 shared
McKesson Ventures1 shared
Andreessen Horowitz1 shared
Allen & Company LLC1 shared
Last updated: 20 October 2026