144 0001032235 XXXXXXXX LIVE 0001013857 PEGASYSTEMS INC 001-11859 225 WYMAN STREET STE 300 WALTHAM MA 02451-1293 6173749600 TREFLER ALAN Officer Director 10% Stockholder Common Wells Fargo Clearing Services

1 N. Jefferson Ave. St. Louis MO 63103

50000 2230219.83 169043716 02/17/2026 Nasdaq Common 12/19/2025 Gift Alan Trefler Y 05/08/1997 50000 12/19/2025 N/A N Alan Trefler

225 Wyman Street STE 300 Waltham MA 02451-1293

Common Shares of PEGA 12/17/2025 28354 1636309.34 Alan Trefler

225 Wyman Street STE 300 Waltham MA 02451-1293

Common Shares of PEGA 12/17/2025 14593 857630.61 Alan Trefler

225 Wyman Street STE 300 Waltham MA 02451-1293

Common Shares of PEGA 12/17/2025 2053 121825.02 Alan Trefler

225 Wyman Street STE 300 Waltham MA 02451-1293

Common Shares of PEGA 12/18/2025 21281 1244938.50 Alan Trefler

225 Wyman Street STE 300 Waltham MA 02451-1293

Common Shares of PEGA 12/18/2025 23719 1395863.15 Alan Trefler

225 Wyman Street STE 300 Waltham MA 02451-1293

Common Shares of PEGA 01/21/2026 18092 863531.16 Alan Trefler

225 Wyman Street STE 300 Waltham MA 02451-1293

Common Shares of PEGA 01/21/2026 7824 380324.64 Alan Trefler

225 Wyman Street STE 300 Waltham MA 02451-1293

Common Shares of PEGA 01/21/2026 7172 357022.16 Alan Trefler

225 Wyman Street STE 300 Waltham MA 02451-1293

Common Shares of PEGA 01/21/2026 11790 598814.10 Alan Trefler

225 Wyman Street STE 300 Waltham MA 02451-1293

Common Shares of PEGA 01/21/2026 122 6264.70 Alan Trefler

225 Wyman Street STE 300 Waltham MA 02451-1293

Common Shares of PEGA 01/22/2026 7694 375082.50 Alan Trefler

225 Wyman Street STE 300 Waltham MA 02451-1293

Common Shares of PEGA 01/22/2026 37306 1855227.38 Shares were sold in the Trefler Foundation. Alan Trefler is an officer of the foundation and an officer, director and 10 percent shareholder of Pegasystems, Inc. 02/17/2026 Alan Trefler