Managing Director and Global Co-Head, Prime Brokerage & Outsourced Trading

Jack Seibald is Managing Director and Global Co-Head of Prime Brokerage & Outsourced Trading. Mr. Seibald co-founded Concept Capital Markets, LLC, and until its acquisition by Cowen, served as a Managing Member of the firm. During his tenure with Concept Capital, Mr. Seibald was involved in the management of all aspects of the firm’s operations, with a particular emphasis on business and client development and legal matters. Mr. Seibald also served as a member of the Board of Managers of Concept Capital Holdings, LLC, the company’s former parent, Concept Capital Administration, LLC, which provided administrative services to the company and its affiliates, and ConceptONE, LLC, which provided risk and performance analytic solutions, middle and back office support services, and regulatory reporting services to investment managers. Mr. Seibald has been affiliated with the firm and its predecessors since 1995 and has extensive experience in prime brokerage, investment management, and investment research dating back to 1983.

From 1997 to 2005, Mr. Seibald was also a Managing Member of Whiteford Advisors, LLC, an investment management firm, where as co-founder, he co-managed several pools of funds. He began his career at Oppenheimer & Co. as an equity analyst covering the retailing industry and has also been affiliated with Salomon Brothers, and Morgan Stanley & Co in similar positions. Mr. Seibald also operated The Seibald Report, Inc., an independent research firm specializing in the retailing sector. For some fourteen years through 2017, Mr. Seibald served as a member of the Board of Directors of Kingstone Companies, Inc. a publicly traded insurance holding company, during which time he gained extensive experience in corporate policy and governance matters.

He holds an MBA from Hofstra University and a BA from George Washington University.


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