X0306 4 2015-12-04 0001269021 PORTOLA PHARMACEUTICALS INC PTLA 0001250409 BIRD JEFFREY W 755 PAGE MILL ROAD, SUITE A-200 PALO ALTO CA 94304-1005 1 Common Stock 2015-12-04 4 J 0 144333.0000 0.0000 D 958491.0000 I By Ltd Partnership (SHV) Common Stock 2015-12-04 4 J 0 22454.0000 0.0000 A 59053.0000 I By Trust (Trustees) Common Stock 36602.0000 I By Ltd Partnership (NEST) Distribution of shares without consideration to the managing directors of the General Partner of Sutter Hill Ventures, a California Limited Partnership, in accordance with the partnership agreement. As disclosed in the Issuer's final prospectus supplement dated December 3, 2015 (the "Prospectus Supplement"), filed with the U.S. Securities and Exchange Commission on December 4, 2015, with respect to the Issuer's public offering of common stock (the "Offering"), these distributed shares, following their receipt by the distributees, remain subject to the terms of a lock-up agreement with the underwriters for the Offering during the 90 day period following the date of the Prospectus Supplement. Shares held by Sutter Hill Ventures, a California Limited Partnership. The reporting person is a managing director and member of the management committee of the General Partner of Sutter Hill Ventures, a California Limited Partnership. The reporting person disclaims beneficial ownership in these shares except as to the reporting person's pecuniary interest in these shares. Shares held by a trust of which the reporting person is a trustee. The reporting person disclaims beneficial ownership in these shares except as to the reporting person's pecuniary interest in the trust. Shares held by a limited partnership of which the reporting person is a trustee of a trust which is the General Partner. The reporting person disclaims beneficial ownership of these shares except as to the reporting person's pecuniary interest therein. /s/ Robert Yin, by power of attorney 2015-12-08