0000927016-03-001028 10-K 6 20021231 20030311 PEGASYSTEMS INC 0001013857 7374 042787865 MA 1231 10-K 34 001-11859 03598619 101 MAIN ST CAMBRIDGE MA 02142-1590 6173749600 101 MAIN ST CAMBRIDGE MA 02142-1590 10-K 1 d10k.htm FORM 10-K EX-10.23 3 dex1023.htm AMENDMENT #8 TO LEASE AGREEMENT EX-10.24 4 dex1024.htm LETTER DATED 11/5/2002 RE: LEASE EX-21.1 5 dex211.htm SUBSIDIARIES OF PEGASYSTEMS EX-23.1 6 dex231.htm INDEPENDENT AUDITOR'S CONSENT EX-99.1 7 dex991.htm CEO AND CFO CERTIFICATIONS