25 results
10-K
2020 FY
EX-4.2
Aspen Technology Inc
Annual report
9 Dec 20
4:37pm
S-8
EX-4.4
Aspen Technology Inc
21 Dec 18
Registration of securities for employees
4:20pm
8-K
EX-4
Aspen Technology Inc
22 Aug 03
Other events
12:00am
8-K
EX-4.1
Aspen Technology Inc
2 Jun 03
Other events
12:00am
8-A12G/A
EX-4.8
Aspen Technology Inc
2 Jun 03
Registration of securities (amended)
12:00am
8-K
EX-4.2
zr6hb
2 Jun 03
Other events
12:00am
8-A12G/A
EX-4.7
wmu8 s29fvx30dgieb
31 May 02
Registration of securities (amended)
12:00am
8-A12G/A
EX-4.6
dxaew0ir89ekdk
20 Mar 02
Registration of securities (amended)
12:00am
8-K
EX-4.1
ytn3zyn 0yo
20 Mar 02
Other events
12:00am
8-K
EX-4.2
nnhb0 mi7xw
20 Mar 02
Other events
12:00am
8-K
EX-4.2
9xa wrm7z5
12 Feb 02
Other events
12:00am
8-A12G/A
EX-4.5
tqmq0a3w1jos3uwz3vp
12 Feb 02
Registration of securities (amended)
12:00am
8-A12G/A
EX-4.4
pyo4sb0k7qvm
8 Nov 01
Registration of securities (amended)
12:00am
S-8
EX-4.6
qhkws
28 Jul 00
Registration of securities for employees
12:00am
8-K
EX-4.1
0crwh9ten
19 Jun 98
Aspen Technology
12:00am
8-A12G/A
EX-4.0
v2i0va24myrhjzqv3
12 Jun 98
Registration of securities (amended)
12:00am
8-K
EX-4.1
edydcf z2
27 Mar 98
Aspen Technology, Inc.
12:00am
S-8
EX-4.1
qf1d0q6z46z7dvu9l
20 Jan 98
Registration of securities for employees
12:00am
8-K
EX-4
ras39jd774obb5r06kq
10 Oct 97
Aspen Technology, Inc.
12:00am