| Form type | Sec Links | Description | Filing date | Reporting date |
|---|---|---|---|---|
| SC 13G/A | Report | NONE | Feb 14, 2023 | |
| SC 13G/A | Report | Jun 9, 2022 | ||
| SC 13G | Report | May 9, 2022 | ||
| SC 13G/A | Report | Feb 14, 2022 | ||
| SC 13G/A | Report | NONE | Feb 14, 2022 | |
| SC 13G/A | Report | SCHEDULE 13G/A | Feb 9, 2022 | |
| SC 13G/A | Report | Feb 1, 2022 | ||
| SC 13G/A | Report | NONE | Dec 10, 2021 | |
| SC 13G/A | Report | NONE | Mar 10, 2021 | |
| SC 13G/A | Report | ASPEN TECHNOLOGY, INC. | Feb 12, 2021 | |
| SC 13G/A | Report | Feb 12, 2021 | ||
| SC 13G/A | Report | NONE | Feb 11, 2021 | |
| SC 13G/A | Report | SCHEDULE 13G/A | Feb 10, 2021 | |
| SC 13G/A | Report | Jan 29, 2021 | ||
| SC 13G/A | Report | Dec 10, 2020 | ||
| SC 13G | Report | Nov 9, 2020 | ||
| SC 13G | Report | May 11, 2020 | ||
| SC 13G/A | Report | ASPEN TECHNOLOGY, INC. | Feb 14, 2020 | |
| SC 13G/A | Report | NONE | Feb 14, 2020 | |
| SC 13G/A | Report | Feb 13, 2020 | ||
| SC 13G/A | Report | SCHEDULE 13G/A | Feb 12, 2020 | |
| SC 13G/A | Report | Feb 5, 2020 | ||
| SC 13G/A | Report | ASPEN TECHNOLOGY, INC. | Feb 14, 2019 | |
| SC 13G/A | Report | NONE | Feb 13, 2019 | |
| SC 13G/A | Report | NONE | Feb 12, 2019 | |
| SC 13G | Report | Feb 12, 2019 | ||
| SC 13G/A | Report | Feb 11, 2019 | ||
| SC 13G/A | Report | Feb 4, 2019 | ||
| SC 13G/A | Report | Nov 13, 2018 | ||
| SC 13G | Report | NONE | Feb 15, 2018 | |
| SC 13G/A | Report | ASPEN TECHNOLOGY, INC. | Feb 14, 2018 | |
| SC 13G | Report | NONE | Feb 13, 2018 | |
| SC 13G/A | Report | Feb 12, 2018 | ||
| SC 13G/A | Report | Jan 29, 2018 | ||
| SC 13G/A | Report | Mar 10, 2017 | ||
| SC 13G/A | Report | ASPEN TECHNOLOGY, INC. | Feb 14, 2017 | |
| SC 13G/A | Report | SEC SCHEDULE 13G | Feb 10, 2017 | |
| SC 13G/A | Report | Feb 9, 2017 | ||
| SC 13G/A | Report | ASPEN TECHNOLOGY, INC. | Feb 3, 2017 | |
| SC 13G/A | Report | Jan 19, 2017 | ||
| SC 13G | Report | SEC SCHEDULE 13G | Feb 16, 2016 | |
| SC 13G/A | Report | ASPEN TECHNOLOGY, INC. | Feb 12, 2016 | |
| SC 13G/A | Report | Feb 10, 2016 | ||
| SC 13G | Report | ASPEN TECHNOLOGY INC | Feb 2, 2016 | |
| SC 13G/A | Report | Jan 25, 2016 | ||
| SC 13G/A | Report | ASPEN TECHNOLOGY, INC. | Feb 13, 2015 | |
| SC 13G/A | Report | Feb 10, 2015 | ||
| SC 13G/A | Report | Jan 22, 2015 | ||
| SC 13G/A | Report | Feb 14, 2014 | ||
| SC 13G/A | Report | Feb 11, 2014 | ||
| SC 13G/A | Report | ASPEN TECHNOLOGY, INC. | Feb 7, 2014 | |
| SC 13G/A | Report | Jan 28, 2014 | ||
| SC 13G/A | Report | Feb 14, 2013 | ||
| SC 13G | Report | Feb 13, 2013 | ||
| SC 13G/A | Report | ASPEN TECHNOLOGY, INC. | Feb 7, 2013 | |
| SC 13G | Report | Jan 30, 2013 | ||
| SC 13G/A | Report | ASPEN TECHNOLOGY, INC. | Feb 14, 2012 | |
| SC 13G/A | Report | Feb 14, 2012 | ||
| SC 13G | Report | Feb 14, 2012 | ||
| SC 13G/A | Report | SCHEDULE 13G AMENDMENT NO. 1 | Feb 14, 2012 | |
| SC 13G/A | Report | Feb 13, 2012 | ||
| SC 13G/A | Report | Feb 14, 2011 | ||
| SC 13G/A | Report | Feb 14, 2011 | ||
| SC 13G/A | Report | AMENDMENT NO. 3 | Feb 11, 2011 | |
| SC 13G | Report | SC 13G | Feb 11, 2011 | |
| SC 13G | Report | ASPEN TECHNOLOGY, INC 13G 123110 | Feb 10, 2011 | |
| SC 13G/A | Report | ASPEN TECHNOLOGY, INC. | Feb 8, 2011 | |
| SC 13G | Report | ASPEN TECHNOLOGY INITIAL13G - 093010 | Sep 30, 2010 | |
| SC 13G | Report | Sep 27, 2010 | ||
| SC 13G/A | Report | SC 13G/A | Apr 9, 2010 | |
| SC 13G/A | Report | SECOND AMENDMENT | Feb 16, 2010 | |
| SC 13G/A | Report | Feb 16, 2010 | ||
| SC 13G | Report | ASPEN TECHNOLOGY | Jan 15, 2010 |