X0306 4 2017-11-15 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 2017-11-15 4 M 0 9400 0.00 A 37493 D Common Stock 2017-11-15 4 F 0 4999 51.35 D 32494 D Common Stock 2017-11-15 4 M 0 51224 0.00 A 83718 D Common Stock 2017-11-15 4 F 0 29932 51.40 D 53786 D Stock Options 5.94 2017-11-15 4 M 0 9400 0.00 D 2009-12-11 2018-12-11 Common Stock 9400 0 D Stock Options 11.05 2017-11-15 4 M 0 51224 0.00 D 2013-12-12 2022-12-12 Common Stock 53920 2696 D Represents the exercise price of the Stock Options referenced in Table II and Mr. Pyle's tax liability, which were paid by way of withholding by the Company of shares of equal value. Options vested 20% on December 11, 2009, with the remaining 80% vesting in equal quarterly installments over the next four years. The grant of restricted stock units was previously reported as 4,700, but has been adjusted to reflect a 2-for-1 stock split that occurred on April 1, 2014. Options vested 20% on December 12, 2013, with the remaining 80% vesting in equal quarterly installments over the next four years. The grant of restricted stock units was previously reported as 26,960, but has been adjusted to reflect a 2-for-1 stock split that occurred on April 1, 2014. /s/ Janet Mesrobian, Esq., Attorney-In-Fact for Michael Pyle 2017-11-17