X0306 4 2017-06-01 1 0001269021 PORTOLA PHARMACEUTICALS INC PTLA 0001512375 Maxwell (Mauritius) Pte Ltd C/O CIM CORPORATE SERVICES LTD., LES CASCADES, EDITH CAVELL ST. PORT LOUIS O4 MAURITIUS 0 0 1 0 0001434871 Cairnhill Investments (Mauritius) Pte Ltd C/O CIM CORPORATE SERVICES LTD., LES CASCADES, EDITH CAVELL ST. PORT LOUIS O4 MAURITIUS 0 0 1 0 0001379348 Fullerton Management Pte Ltd 60B ORCHARD ROAD #06-18, TOWER 2 THE ATRIUM@ORCHARD SINGAPORE U0 238891 SINGAPORE 0 0 1 0 0001021944 Temasek Holdings (Private) Ltd 60B ORCHARD ROAD #06-18, TOWER 2 THE ATRIUM@ORCHARD SINGAPORE U0 238891 SINGAPORE 0 0 1 0 Common stock 2017-06-01 4 S 0 1700000 34.40 D 4133568 D Maxwell (Mauritius) Pte Ltd ("Maxwell") owns 4,133,568 shares of the Issuer's common stock ("Shares") and V-Sciences Investments Pte Ltd ("V-Sciences") owns 750,000 Shares. Maxwell is wholly owned by Cairnhill Investments (Mauritius) Pte Ltd, which is wholly owned by Fullerton Management Pte Ltd ("FMPL"). V-Sciences is wholly owned by Temasek Life Sciences Private Limited, which is wholly owned by FMPL. FMPL is wholly owned by Temasek Holdings (Private) Limited. Accordingly, each of FMPL and Temasek Holdings (Private) Limited, through the ownership described herein, may be deemed to beneficially own the 4,883,568 Shares owned by Maxwell and V-Sciences, collectively. By: /s/ Rooksana Shahabally, Director, Maxwell (Mauritius) Pte Ltd 2017-06-05 By: /s/ Rooksana Shahabally, Director, Cairnhill Investments (Mauritius) Pte Ltd 2017-06-05 By: /s/ Cheong Kok Tim, Director, Fullerton Management Pte Ltd 2017-06-05 By: /s/ Christina Choo, Authorized Signatory, Temasek Holdings (Private) Limited 2017-06-05