X0203 3 2008-08-29 0 0001183765 THRESHOLD PHARMACEUTICALS INC THLD 0001257444 ALTA BIOPHARMA PARTNERS III LP ONE EMBARCADERO CENTER, SUITE 3700 SAN FRANCISCO CA 94111 0 0 1 0 0001280265 ALTA BIOPHARMA PARTNERS III GMBH & CO BETEILIGUNGS KG ONE EMBARCADERO CENTER, SUITE 3700 SAN FRANCISCO CA 94111 0 0 1 0 0001280238 ALTA EMBARCADERO BIOPHARMA PARTNERS III LLC ONE EMBARCADERO CENTER, SUITE 3700 SAN FRANCISCO CA 94111 0 0 1 0 0001198323 DELEAGE JEAN ONE EMBARCADERO CENTER, SUITE 3700 SAN FRANCISCO CA 94111 0 0 1 0 0001198321 CHAMPSI FARAH ONE EMBARCADERO CENTER, SUITE 3700 SAN FRANCISCO CA 94111 0 0 1 0 0001198332 PENHOET EDWARD ONE EMBARCADERO CENTER, SUITE 3700 SAN FRANCISCO CA 94111 0 0 1 0 0001211840 HURWITZ EDWARD ONE EMBARCADERO CENTER, SUITE 3700 SAN FRANCISCO CA 94111 0 0 1 0 0001280234 ALTA BIOPHARMA MANAGEMENT III LLC ONE EMBARCADERO CENTER, SUITE 3700 SAN FRANCISCO CA 94111 0 0 1 0 0001198328 MARDUEL ALIX ONE EMBARCADERO CENTER, SUITE 3700 SAN FRANCISCO CA 94111 0 0 1 0 Common Stock 1200154 I By limited partnership Common Stock 80601 I By limited partnership Common Stock 29576 I By limited liability company Warrant 2.34 2013-08-29 Common Stock 404080 I By limited partnership Warrant 2.34 2013-08-29 Common Stock 27137 I By limited partnership Warrant 2.34 2013-08-29 Common Stock 9958 I By limited liability company These securities are held by Alta BioPharma Partners III, L.P. ("ABPIII"). Alta BioPharma Management III, LLC ("ABMIII") is the general partner of ABPIII and the managing limited partner of Alta BioPharma Partners III GmbH & Co. Beteiligungs KG("ABPIIIKG"). Jean Deleage, Farah Champsi, Edward Penhoet, Edward Hurwitz, and Alix Marduel are directors of ABMIII and managers of Alta Embarcadero BioPharma Partners III, LLC ("AEBPIII" and, along with ABMIII and ABPIIIKG, the "Funds")and exercise shared voting and investment power with respect to the securities held by the funds. Each of the reporting persons disclaims beneficial ownership of such securities, except to the extent of his, her or its proportionate pecuniary interest therein. These securities are held by ABPIIIKG. These securities are held by AEBPIII. These warrants are immediately exercisable. Alta BioPharma Partners III, L.P. By: Alta BioPharma Management III, LLC, its General Partner /s/ Jean Deleage, Director 2008-09-05 By: Alta BioPharma Management III, LLC, it's Managing Limited Partner 2008-09-05 /s/ Jean Deleage, Manager 2008-09-05 /s/ Jean Deleage 2008-09-05 /s/ Farah Champsi 2008-09-05 /s/ Edward Penhoet 2008-09-05 /s/ Edward Hurwitz 2008-09-05 /s/ Jean Deleage, Director 2008-09-05 /s/ Alix Marduel 2008-09-05