Jim Armstrong

Managing Director

A successful and experienced early stage venture investor across a variety of enterprise and consumer facing technology companies, Jim has established himself as a leading investor based in Southern California. Since joining Clearstone early in its formation, Jim has applied his experience and industry contacts to help companies deliver a strong record of venture performance. Jim invests nationwide, and his work at Clearstone focuses on information technology investments, with particular interest in consumer Internet, gaming, application software, and Internet enabled business processes. On several occasions, Forbes Magazine has recognized Jim on its “Midas List” as one of the top Venture Capitalists in the United States.

Jim joined Clearstone Venture Partners in 1998 from Austin Ventures, a leading venture fund, where he spent three years supporting investments in early stage companies. Jim also worked with idealab, the incubator, in the late 90’s, helping to guide and fund a variety of early Internet companies.

Jim led Clearstone’s current investments in SupplyFrame, Vast, LeisureLink, UserTesting, and eCinity, and is an investor and board member of two incubators—The Hive (big data) and The Fabric (cloud networking). Jim actively represented Clearstone’s early stage, “pre-revenue” investments in former portfolio companies PayPal (acquired by eBay as a public company), United Online (NASDAQ: UNTD), Internet Brands (NASDAQ:INET before being taken private), Integrien (acquired by VMWare), Jump Networks (acquired by Microsoft), Comet Systems (acquired by Miva), TriVida (acquired by BeFree), and Composite Software (acquired by Cisco). Jim is an angel investor in and advisor to many companies, and he sits on the board of the Los Angeles Venture Association.

Jim holds a BA in Economics from the University of California at Los Angeles and an MBA from the McCombs School at the University of Texas at Austin.

You can follow Jim’s thoughts on market trends, investing, and venture capital on his blog (, through his video series (, and via twitter (@jimarmstrongvc).