Argonaut Private Equity is a Tulsa, Oklahoma-based private equity firm founded in 2002. It focuses on buyout and growth equity investments in middle-market companies across manufacturing, distribution, energy services, and industrial sectors, primarily in Middle America.
38% of their portfolio is in Hardware & Semiconductors. Average disclosed round size is $27.9M (across 8 rounds with reported amounts).
Portfolio
8
Fund Size
$500M
Top Stage
Unknown
Last 12 Mo
0
Team
John Young
Director
Eric Weeldreyer
Principal
Brandon Lenhart
Vice President of Operations
Brian Green
Vice President of Operations
Christopher Twist
Vice President of Operations
Mark Mogelnicki
Vice President of Operations
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
8 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Aspen Aerogels | Unknown | $21.5M | Oct 2010 |
 Luminus | Bridge | $19M | Jan 2010 |
| CCorAssist | Unknown | $5.3M | Jan 2009 |
 Flash Networks | Unknown | $9.5M | Jan 2006 |
| IInfinera Corporation | Series D | $53M | Jan 2003 |
 Infinera | Series D | $53M | Jan 2003 |
 Achronix Semiconductor | Series B | $52M | — |
 Amimon | Unknown | $10M | — |
Top Co-Investors
Evergreen Venture Partners3 shared
Agilent Technologies2 shared
Ontario Teachers' Pension Plan2 shared
Battery Ventures1 shared
Tenaya Capital1 shared
Paladin Capital Group1 shared
Braemar Energy Ventures1 shared
HarbourVest Partners1 shared
Cedar Fund1 shared
Last updated: 8 September 2026