Thomas H. Lee Partners, L.P. (THL) is a Boston-based private equity firm founded in 1974 that invests in middle-market growth companies across three industry verticals: Financial Technology & Services, Healthcare, and Technology & Business Solutions. The firm employs an identified sector opportunity (ISO) process and has managed or deployed over $50 billion of equity capital.
Average disclosed round size is $699.0M (across 4 rounds with reported amounts).
Portfolio
6
Fund Size
$6.3B
Top Stage
Growth
Last 12 Mo
0
Team
GR
Ganesh Rao
Managing Director
TD
Tony DiNovi
Chairman
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
6 investments
| Company | Round | Amount | Date |
|---|---|---|---|
| AAgiliti Health | Unknown | $2.5B | Feb 2024 |
 Inriver | Growth | — | May 2022 |
 Kinexon | Series A | $130M | May 2022 |
 RightHand Robotics | Series C | $66M | Feb 2022 |
 FourKites | Series D | $100M | Mar 2021 |
| AAshling Partners | Growth | — | Feb 2021 |
Top Co-Investors
Zebra Technologies2 shared
Build Collective1 shared
F-Prime Capital1 shared
Menlo Ventures1 shared
GV1 shared
Safar Partners1 shared
SoftBank Vision Fund1 shared
Matrix Partners1 shared
Global Brain Corporation1 shared
Epson X Investment Corporation1 shared
Verdane1 shared
Qualcomm Ventures1 shared
Volvo Group Venture Capital1 shared
BMW i Ventures1 shared
TomorrowVentures1 shared
Last updated: 8 September 2026