X0306 4 2019-06-10 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 2019-06-10 4 M 0 402 0.00 A 19338 D Common Stock 2019-06-10 4 F 0 179 70.63 D 19159 D Common Stock 2019-06-10 4 S 0 1100 71.72 D 18059 D Common Stock 2019-06-10 4 S 0 900 72.13 D 17159 D Common Stock 2019-06-10 4 S 0 1000 70.95 D 16159 D Restricted Stock Units 0.00 2019-06-10 4 M 0 402 0.00 D 2017-03-09 Common Stock 402 2812 D Represents 5% vesting on June 9, 2019, with a release date of June 10, 2019, the first business day following the vesting. The original grant was 8,033 restricted stock units, with 20% vesting on March 9, 2017, and the remaining 80% vesting in equal quarterly installments over the remaining four years. 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 June 10, 2019, ranging from $71.03 to $72.01. 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 June 10, 2019, ranging from $72.03 to $72.20. 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. Each restricted stock unit represents the right to receive, following vesting, one share of the issuer's common stock. Once vested, the shares of common stock are not subject to expiration. /s/ Janet Mesrobian, Esq., Attorney-in-Fact for Michael R. Pyle 2019-06-12