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ASPEN TECHNOLOGY INC /DE/

SIC 7371 · Services-Computer Programming Services
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ASPEN TECHNOLOGY INC /DE/

CIK:0000929940|SEC Filings

INDENTURES

EX-4.2
azpn-20200630x10kxex42.htm
Dec 9, 2020
EX-4.4
a2018forms-8xexhibit44.htm
Dec 21, 2018
EX-4.8
a2112355zex-4_8.htm
Jun 2, 2003
EX-4.1
a2112354zex-4_1.txt
Jun 2, 2003
EX-4.2
a2112354zex-4_2.txt
Jun 2, 2003
EX-4.7
b43246a5exv4w7.txt
May 31, 2002
EX-4.1
b42458atex4-1.txt
Mar 20, 2002
EX-4.2
b42458atex4-2.txt
Mar 20, 2002
EX-4.6
b42458aaex4-6.txt
Mar 20, 2002
EX-4.2
b41914atex4-2.txt
Feb 12, 2002
EX-4.5
b41951a3ex4-5.txt
Feb 12, 2002
EX-4.4
b41098atex4-4.txt
Nov 8, 2001
EX-4.6
ex4-6.txt
Jul 28, 2000
EX-4.1
EX-4.1.txt
Jun 19, 1998
EX-4.0
EX-4.0.txt
Jun 12, 1998
EX-4.3
EX-4.3.txt
May 15, 1998
EX-4.1
EX-4.1.txt
Mar 27, 1998
EX-4.1
EX-4.1.txt
Jan 20, 1998
EX-4.(A)
EX-4.(A).txt
Oct 10, 1997
EX-4.1(B)
EX-4.1(B).txt
Feb 11, 1997