X0306 4 2019-11-12 0 0001013857 PEGASYSTEMS INC PEGA 0001680115 STILLWELL KENNETH C/O PEGASYSTEMS INC ONE ROGERS STREET CAMBRIDGE MA 02142 0 1 0 0 CFO, SVP Common Stock 2019-11-12 4 M 0 10576 27.74 A 17144 D Common Stock 2019-11-12 4 F 0 6910 73.80 D 10234 D Common Stock 2019-11-12 4 S 0 3666 73.63 D 6568 D Common Stock 2019-11-12 4 S 0 1000 73.77 D 5568 D Stock Options 27.74 2019-11-12 4 M 0 10576 0.00 D 2017-08-01 2026-08-01 Common Stock 10576 76531 D Represents the exercise price of the stock options referenced in Table II and Mr. Stillwell's tax liability, which was paid by way of the Company withholding shares of equal value. Represents the weighted average of the sale prices on November 12, 2019, ranging from $73.59 to $73.64. The individual has provided to the Company, and undertakes to provide to 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 November 12, 2019, ranging from $73.77 to $73.78. The individual has provided to the Company, and undertakes to provide to 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. Options vested 20% on August 1, 2017, with the remaining 80% vesting in equal quarterly installments over the next four years. /s/ Janet Mesrobian, Esq., Attorney-in-Fact for Kenneth Stillwell 2019-11-13