X0508 4 2026-02-02 0 0001013857 PEGASYSTEMS INC PEGA 0001680115 STILLWELL KENNETH C/O PEGASYSTEMS INC. 225 WYMAN STREET, STE 300 WALTHAM MA 02451 0 1 0 0 COO, CFO 1 Common stock 2026-02-02 4 S 0 1000 43.69 D 121880 D Common stock 1908 I Reporting Person's children Sold pursuant to a pre-arranged trading plan adopted by Mr. Stillwell August 29, 2024 under Rule 10b5-1 of the Securities Exchange Act of 1934, as amended. /s/ Ewelina Kemp, Attorney-in-Fact for Kenneth Stillwell 2026-02-03