Ramius LLC, the global alternative investment management business of Cowen Group, Inc. ("Cowen") (NASDAQ: COWN), today announced that Ken Griebell has joined the firm in New York as a Director, reporting to David Thill, Managing Director and head of worldwide third party distribution and intermediary relationships at Ramius. In this newly created role, Mr. Griebell will expand Ramius’ marketing and distribution activities for liquid alternative products to new and existing customers and grow Ramius’ presence across distribution channels that focus on mass affluent retail investors. “We are pleased to welcome Ken to our team,” said Thomas W. Strauss, President and Chief Executive Officer of Ramius. “Ken’s extensive relationships and expertise in distributing liquid alternatives will be invaluable as we market our diverse portfolio of alternative investment products to investors, including financial advisors and their clients, many of whom have historically had limited access to these products and strategies. Ramius’ institutional caliber liquid alternative products allow access to an important asset class for the mass affluent retail client and we look forward to building upon Ken’s experience and relationships to offer these products to this clientele.” Mr. Griebell brings a wealth of experience, having spent more than 20 years in the financial services industry. He joins Ramius from Equinox Fund Management, where he most recently served as Managing Director of Strategic Accounts. Mr. Griebell received a Bachelor of Science in Business Administration from The University of Connecticut. About Ramius LLC Ramius LLC is a registered investment advisor that manages $11.2 billion (as of October 1, 2011) in assets in a variety of alternative investment strategies and is the global alternative investment management business of Cowen Group, Inc. Information regarding mutual funds offered by Ramius can be accessed at the following website: www.RamiusMutualFunds.com. About Cowen Group, Inc. Cowen Group, Inc. is a diversified financial services firm and, together with its consolidated subsidiaries, provides alternative investment management, investment banking, research, and sales and trading services through its two business segments: Ramius and its affiliates comprise the Company's alternative investment management segment, while Cowen and Company is its broker-dealer segment. Founded in 1918, the firm is headquartered in New York and has offices located in major financial centers around the world.