Page 16 of 16 – SEC Filing
Schedule 13G PAGE 16 of 16
CUSIP No. 24344T101
EXHIBIT A – JOINT FILING AGREEMENT
This joint filing agreement is made and entered into as of
this 11th day of October, 2017, by and among Viking Global Investors LP,
Viking Global Opportunities GP LLC, Viking Global Opportunities
Portfolio GP LLC, Viking Global Opportunities Liquid Portfolio
Sub-Master LP, Viking Global Opportunities Intermediate LP, DRAGSA 14 LLC,
O. Andreas Halvorsen, David C. Ott and Rose S. Shabet.
The parties hereby agree to jointly prepare and file a Schedule 13G
with respect to Deciphera Pharmaceuticals, Inc., as well as any amendments
thereto, pursuant to the Securities Exchange Act of 1934, as amended.
IN WITNESS WHEREOF, the parties hereto have executed this agreement
as of the date first set forth above.
Dated: October 11, 2017
/s/ O. ANDREAS HALVORSEN
By: O. Andreas Halvorsen – individually and
as an Executive Committee Member of
Viking Global Partners LLC, on behalf of
VIKING GLOBAL INVESTORS LP for itself and DRAGSA 14 LLC,
and as an Executive Committee Member of
VIKING GLOBAL OPPORTUNITIES GP LLC, on behalf
of itself and VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC,
VIKING GLOBAL OPPORTUNITIES LIQUID PORTFOLIO SUB-MASTER LP and
VIKING GLOBAL OPPORTUNITIES INTERMEDIATE LP
/s/ DAVID C. OTT
By: David C. Ott – individually and
as an Executive Committee Member of
Viking Global Partners LLC, on behalf of
VIKING GLOBAL INVESTORS LP for itself and DRAGSA 14 LLC,
and as an Executive Committee Member of
VIKING GLOBAL OPPORTUNITIES GP LLC, on behalf
of itself and VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC,
VIKING GLOBAL OPPORTUNITIES LIQUID PORTFOLIO SUB-MASTER LP and
VIKING GLOBAL OPPORTUNITIES INTERMEDIATE LP
/s/ ROSE S. SHABET
By: Rose S. Shabet – individually and
as an Executive Committee Member of
Viking Global Partners LLC, on behalf of
VIKING GLOBAL INVESTORS LP for itself and DRAGSA 14 LLC,
and as an Executive Committee Member of
VIKING GLOBAL OPPORTUNITIES GP LLC, on behalf
of itself and VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC,
VIKING GLOBAL OPPORTUNITIES LIQUID PORTFOLIO SUB-MASTER LP and
VIKING GLOBAL OPPORTUNITIES INTERMEDIATE LP
