X0306 4 2019-08-01 0 0001013857 PEGASYSTEMS INC PEGA 0001222579 PYLE MICHAEL R C/O PEGASYSTEMS INC. 1 ROGERS STREET CAMBRIDGE MA 02142 0 1 0 0 Senior VP, Engineering Common Stock 2019-08-01 4 S 0 1900 75.33 D 11259 D Common Stock 2019-08-01 4 S 0 1100 76.24 D 10159 D Sold pursuant to a pre-arranged stock trading plan under rule 10b5-1 of the Securities Exchange Act of 1934, as amended. Represents the weighted average of the sale prices on August 1, 2019, ranging from $74.80 to $75.72. The individual has provided the Company and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Company, upon request, full information regarding the number of shares sold at each separate price. Represents the weighted average of the sale prices on August 1, 2019, ranging from $76.08 to $76.40. The individual has provided the Company and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Company, upon request, full information regarding the number of shares sold at each separate price. Does not include shares of common stock subject to unvested restricted stock units and/or options awards. /s/ Janet Mesrobian, Esq., Attorney-in-Fact for Michael Pyle 2019-08-05