Portola Pharmaceuticals to Announce Third Quarter 2017 Financial Results and Host Conference Call on Monday, November 6

SOUTH SAN FRANCISCO, Calif., Oct. 30, 2017 -- Portola Pharmaceuticals, Inc.® (Nasdaq:PTLA) today announced that it will host a webcast and conference call to discuss the company’s financial results for the quarter ended September 30, 2017, and provide a general business overview on Monday, November 6, 2017, at 4:30 p.m. ET (1:30 p.m. PT).

Conference Call Details
The live conference call on Monday, November 6, 2017, at 4:30 p.m. Eastern Time, can be accessed by phone by calling (844) 452-6828 from the United States and Canada or (765) 507-2588 internationally and using the passcode 7269839. The webcast can be accessed live on the Investor Relations section of the Company's website at http://investors.portola.com. It will be archived for 30 days following the call.

About Portola Pharmaceuticals, Inc.
Portola Pharmaceuticals is a biopharmaceutical company developing product candidates that could significantly advance the fields of thrombosis and other hematologic diseases. The Company’s first medicine Bevyxxa® (betrixaban), an oral, once-daily Factor Xa inhibitor, was approved by the U.S. Food and Drug Administration in June 2017. The company is also working to advance two clinical programs for AndexXa^® (andexanet alfa), a recombinant protein designed to reverse the anticoagulant effect in patients treated with an oral or injectable Factor Xa inhibitor; and cerdulatinib, a SYK/JAK inhibitor in development to treat hematologic cancers. Portola's partnered program is focused on developing selective SYK inhibitors for inflammatory conditions. For more information, visit http://www.portola.com and follow the Company on Twitter @Portola_Pharma.

Investor Contact:
Michele Mantynen
Portola Pharmaceuticals
[email protected]

Media Contact:
Patrick Ryan
W2O Group
[email protected]