X0202 3 2006-08-03 0 0001360886 OSIRIS THERAPEUTICS, INC. OSIR 0001008317 FRIEDLI PETER 2001 ALICEANNA STREET BALTIMORE MD 21231-3043 1 0 0 0 Common Stock 7807274 D Common Stock 625 I Owned by mother Warrants (right to buy) 12 2006-08-04 2011-05-04 Common Stock 1000000 D Warrants to purchase common stock become exercisable upon the completion of the initial public offering and are priced at the IPO price. 625 shares of common stock owned by the mother of the reporting person, who disclaims beneficial ownership Peter Friedli by Philip R. Jacoby, Jr., Attorney-in-fact 2006-08-03