X0508 4 2026-02-10 0 0001013857 PEGASYSTEMS INC PEGA 0001353196 KOUNINIS EFSTATHIOS A C/O PEGASYSTEMS INC. 225 WYMAN STREET, STE 300 WALTHAM MA 02451 0 1 0 0 SVP, Chief Accounting Officer 0 Stock Options 31.05 2026-02-10 4 A 0 24000 0 A 2025-03-05 2034-03-05 Common stock 24000 38088 D On March 5, 2024, the reporting person was granted an option to purchase shares of Pegasystems common stock. The option vests in two installments, with 25% to vest on the first anniversary of the date of grant based on the Pegasystems' satisfaction of certain performance criteria for the fiscal year ended December 31, 2024, and 75% to vest on the second anniversary of the date of grant based on Pegasystems' satisfaction of certain performance criteria for the fiscal year ended December 31, 2025. Pegasystems overachieved the performance criteria for the fiscal year ended December 31, 2025 at 160%, resulting in vesting of the option as to 24,000 shares. /s/ Ewelina Kemp, Attorney-in-Fact for Efstathios A. Kouninis 2026-02-12