Mark D. Ein is an angel investor and entrepreneur based in Arlington, VA. See sector focus and contact routes.
Mark D. Ein is an angel investor and entrepreneur based in Arlington, VA, who founded Venturehouse Group in 1999 after working at Goldman Sachs and The Carlyle Group. He invests personal capital primarily in early-stage growth companies across diverse industries, with a focus on sectors like application software, media, and health management. His typical investments include companies such as Ex Parte, WEconnect Health Management, and Basket Savings, though specific check sizes and lead/follow roles are not publicly detailed. Notable portfolio companies include Ex Parte (media and information services), WEconnect Health Management (clinics/outpatient services), and Basket Savings (application software). Ein has led over $1.5 billion in private equity, venture capital, and public company investments and has been involved in founding or early stages of six companies valued over $1 billion combined. While he is a prominent investor and sports entrepreneur—owning the Washington Kastles and holding minority stakes in the Washington Commanders, Leeds United, and Baltimore Orioles—there is no publicly available distinctive investment thesis or published writing specifi
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