X0306 4 2017-08-01 0 0001013857 PEGASYSTEMS INC PEGA 0001237268 KRA DOUGLAS I C/O PEGASYSTEMS INC. 1 ROGERS STREET CAMBRIDGE MA 02142 0 1 0 0 SVP, Global Customer Success Common Stock 2017-08-01 4 M 0 1524 0.00 A 24817 D Common Stock 2017-08-01 4 F 0 797 60.70 D 24020 D Common Stock 2017-08-01 4 S 0 727 60.20 D 23293 D Common Stock 2017-08-01 4 M 0 978 0.00 A 24271 D Common Stock 2017-08-01 4 F 0 511 60.70 D 23760 D Common Stock 2017-08-01 4 S 0 467 60.20 D 23293 D Stock Options 6.00 2017-08-01 4 M 0 1524 0.00 D 2008-12-13 2017-12-13 Common Stock 32000 6092 D Stock Options 5.94 2017-08-01 4 M 0 978 0.00 D 2009-12-11 2018-12-11 Common Stock 11740 3912 D Represents the exercise price of the Stock Options referenced in Table II and Mr. Kra's tax liability, which were paid by way of withholding by the Company of shares of equal value. 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, 2017, ranging from $59.85 to $60.55. Options vested 20% on December 13, 2008, with the remaining 80% vesting in equal quarterly installments over the next four years. Options vested 20% on December 11, 2009, with the remaining 80% vesting in equal quarterly installments over the next four years. /s/ Janet Mesrobian, Esq., Attorney-In-Fact for Douglas Kra 2017-08-03