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.
31% of their portfolio is in Hardware & Semiconductors. Average disclosed round size is $22.6M (across 13 rounds with reported amounts).
Portfolio
11
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
13 investments
| Company | Round | Amount | Date |
|---|---|---|---|
| SSiklu | Series B | $19M | Oct 2011 |
 Aspen Aerogels | Unknown | $21.5M | Oct 2010 |
| LLuminus Devices | Unknown | $19M | Feb 2010 |
 Luminus | Bridge | $19M | Jan 2010 |
| CCorAssist | Unknown | $5.3M | Jan 2009 |
| WWestec Intelligent Surveillance | Unknown | $20M | Jan 2009 |
| SSiklu | Series A | $12M | Apr 2008 |
 Amimon | Unknown | $10M | Aug 2006 |
 Flash Networks | Unknown | $9.5M | Jan 2006 |
 Infinera | Series D | $53M | Jan 2003 |
 Achronix Semiconductor | Series B | $52M | — |
| Amimon | Unknown | $10M | — |
| AAchronix | Series B | $43M | — |
Top Co-Investors
Evergreen Venture Partners6 shared
Battery Ventures3 shared
Paladin Capital Group2 shared
Braemar Energy Ventures2 shared
Cedar Fund2 shared
Qualcomm Ventures2 shared
Tenaya Capital1 shared
HarbourVest Partners1 shared
Agilent Technologies1 shared
Ontario Teachers' Pension Plan1 shared
Invest Michigan1 shared
Last updated: 20 October 2026