X0306 4 2019-06-03 0 0001654151 Deciphera Pharmaceuticals, Inc. DCPH 0001410514 Kelly Thomas Patrick C/O DECIPHERA PHARMACEUTICALS, INC. 500 TOTTEN POND ROAD WALTHAM MA 02451 0 1 0 0 Chief Financial Officer Common Stock 2019-06-03 4 M 0 2100 1.89 A 2100 D Common Stock 2019-06-03 4 S 0 2100 25.2033 D 0 D Stock Option (Right to Buy) 1.89 2019-06-03 4 M 0 2100 0.00 D 2025-12-17 Common Stock 2100 149435 D The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.00 to $25.35. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff at the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range. This stock option award was issued pursuant to Deciphera Pharmaceuticals, LLC's 2015 Equity Incentive Plan. The option vests in 16 equal installments over a 4-year period following the vesting commencement date of 2/23/2015, subject to continued service through such dates. /s/ Thomas P. Kelly 2019-06-05