Robert S. Adelson (President)

Bob founded Osage Investments in 1990. He is a native of Tulsa, Oklahoma, where he is a partner in a fourth generation family business. Mr. Adelson serves on a number of Boards and is active in a variety of charitable and educational organizations. Prior to founding Osage, Bob clerked with the honorable Walter K. Stapleton, U.S. Third Circuit Court of Appeals, and practiced corporate law at the Philadelphia law firm of Wolf, Block, Schorr & Solis-Cohen. Bob's previous venture investments include Zany Brainy, Inphonic (NASDAQ: INPC) , Internet Capital Group (NASDAQ: ICGE), and GHR Systems (acquired by Metavante). He is a graduate of The Yale Law School and of Yale College. Bob is a trustee of Jefferson University Hospital, where he currently serves as Chairman of the Board, Jefferson University, and Jefferson Health System. He is also President of the Board of Trustees of The Philadelphia School and is a member of The Yale Law School Fund.

He currently serves on the Board of Directors of Melior Discovery, SevOne, and Red Lasso, and is Chairman of Melior Discovery.

Bob currently resides in Merion, PA, with his wife Marta and his two daughters and son.

Nathanael V. Lentz (Managing Partner)

Nate joined Osage Partners in 2008 having previously been the President and CEO of Verticalnet, Inc., a leading provider of on-demand supply management software solutions, which was sold in January, 2008 to Italy-based BravoSolution.   He served as the Malvern, PA- based Verticalnet’s CEO for over five years and was attributed with leading the transformation of Verticalnet from an on-line operator of web portals to a proven software solution provider while successfully navigating the company through a financial turnaround and ultimately a successful exit.  Prior to Verticalnet, Nate was a Partner at Mercer Management Consulting and led both the San Francisco and the Hong Kong offices.  During his time at Mercer, he worked closely with both multinational companies and high growth emerging businesses both in the U.S. and in over fifteen countries across Asia, Europe, Africa and the Middle East.  Nate began his career at Chemical Bank in New York providing lending and structured finance services to mid-size companies. He is a graduate of Brown University and of the Stanford Graduate School of Business where he graduated with honors. 

He currently serves on the Board of Directors of Carnegie Speech, Landslide Technologies, Inc., and Hard Metrics.

Nate lives with his wife, Suzanne, and three children in Philadelphia.

David C. Drahms (Vice President)

David began his career at Teradyne, Inc., a Boston-based manufacturer of semiconductor test equipment, where he was a mechanical engineer before becoming a project manager. He then attended The Wharton School, where he graduated with an MBA in Entrepreneurship. While at Wharton, David spent the summer as an internal strategist with Rohm and Haas, traveled to Peru to advise a consumer textiles company on a US market entry strategy, and consulted with Teach for America on how to optimize their recruitment process.

He has led the firm's investment in Yaupon Therapeutics, where he serves on the company's Board of Directors, and Red Lasso, where he is a board observer. He is also a board observer of Melior Discovery and HardMetrics.

David is involved in several venture organizations, including the MAC Alliance, Early Stage East and the 3 Rivers Venture Fair. 

He is a native of Savannah, NY, and graduated with a degree in Mechanical Engineering from the University of Rochester.

David currently resides in Philadelphia, PA.