X0306 4 2019-03-28 0 0001013857 PEGASYSTEMS INC PEGA 0001091482 HOVSEPIAN RONALD W ONE ROGERS STREET CAMBRIDGE MA 02142 1 0 0 0 Common Stock 2019-03-28 4 M 0 654 0.00 A 1282 D Restricted Stock Units 0.00 2019-03-28 4 M 0 654 0.00 D 2019-01-02 Common Stock 654 0 D Represents final vesting on March 28, 2019. The original grant was 1,282 restricted stock units, with the initial 628 shares vesting on January 2, 2019, the first business day following the effective date of Mr. Hovsepian's appointment to the Board of Directors as of January 1, 2019. 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, shares of common stock are not subject to expiration. /s/ Janet Mesrobian, Esq., Attorney-in-Fact for Ronald Hovsepian 2019-04-01