X0306 4 2019-11-11 0 0001013857 PEGASYSTEMS INC PEGA 0001353196 KOUNINIS EFSTATHIOS A C/O PEGASYSTEMS INC. 1 ROGERS STREET CAMBRIDGE MA 02142 0 1 0 0 VP of Finance & CAO Common Stock 2019-11-11 4 S 0 150 72.05 D 331 D Represents the weighted average of the sale prices on November 11, 2019, ranging from $72.045 and $72.048. The individual has provided the Company, and undertakes to provide to the Securities and Exchange Commission or to 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 Efstathios A. Kouninis 2019-11-13