| Form type | Sec Links | Description | Filing date | Reporting date |
|---|---|---|---|---|
| SC 13G/A | Report | Jul 8, 2024 | ||
| SC 13G/A | Report | SCHEDULE 13G/A | Feb 13, 2024 | |
| SC 13G/A | Report | ALTAIR ENGINEERING, INC. | Feb 13, 2024 | |
| SC 13G/A | Report | SC 13G/A | Feb 13, 2024 | |
| SC 13G/A | Report | SC 13G/A | Feb 13, 2024 | |
| SC 13G | Report | Jan 31, 2024 | ||
| SC 13G/A | Report | Jan 25, 2024 | ||
| SC 13G/A | Report | SCHEDULE 13G/A | Jun 9, 2023 | |
| SC 13G/A | Report | ALTAIR ENGINEERING, INC. | Feb 13, 2023 | |
| SC 13G/A | Report | SCHEDULE 13G/A | Feb 9, 2023 | |
| SC 13G/A | Report | SC 13G/A | Feb 6, 2023 | |
| SC 13G/A | Report | SC 13G/A | Feb 6, 2023 | |
| SC 13G/A | Report | Jan 31, 2023 | ||
| SC 13G/A | Report | Feb 14, 2022 | ||
| SC 13G/A | Report | SCHEDULE 13G/A | Feb 9, 2022 | |
| SC 13G/A | Report | SC 13G/A | Feb 8, 2022 | |
| SC 13G/A | Report | SC 13G/A | Feb 8, 2022 | |
| SC 13G/A | Report | Feb 3, 2022 | ||
| SC 13G/A | Report | ALTAIR ENGINEERING INC. | Feb 16, 2021 | |
| SC 13G/A | Report | SC 13G/A | Feb 16, 2021 | |
| SC 13G/A | Report | SC 13G/A | Feb 16, 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 | CONESTOGA CAPITAL ADVISORS | Jan 6, 2021 | |
| SC 13G/A | Report | NONE | Feb 18, 2020 | |
| SC 13G | Report | ALTAIR ENGINEERING, INC. | Feb 14, 2020 | |
| SC 13G/A | Report | NONE | Feb 13, 2020 | |
| SC 13G/A | Report | SCHEDULE 13G/A | Feb 12, 2020 | |
| SC 13G/A | Report | SC 13G/A | Feb 6, 2020 | |
| SC 13G/A | Report | SC 13G/A | Feb 6, 2020 | |
| SC 13G/A | Report | Feb 5, 2020 | ||
| SC 13G | Report | CONESTOGA CAPITAL ADVISORS | Jan 17, 2020 | |
| SC 13G/A | Report | Oct 9, 2019 | ||
| SC 13G/A | Report | SC 13G/A | Feb 20, 2019 | |
| SC 13G/A | Report | SC 13G/A | Feb 14, 2019 | |
| SC 13G/A | Report | SC 13G/A | Feb 14, 2019 | |
| SC 13G/A | Report | SC 13G/A | Feb 14, 2019 | |
| SC 13G/A | Report | SC 13G/A | Feb 14, 2019 | |
| SC 13G/A | Report | SC 13G/A | Feb 14, 2019 | |
| SC 13G/A | Report | SC 13G/A | Feb 14, 2019 | |
| SC 13G/A | Report | NONE | Feb 14, 2019 | |
| SC 13G/A | Report | NONE | Feb 13, 2019 | |
| SC 13G | Report | Feb 11, 2019 | ||
| SC 13G | Report | Feb 8, 2019 | ||
| SC 13G | Report | NONE | Feb 15, 2018 | |
| SC 13G | Report | NONE | Feb 14, 2018 | |
| SC 13G | Report | SC 13G | Feb 14, 2018 | |
| SC 13G | Report | SC 13G | Feb 14, 2018 | |
| SC 13G | Report | SC 13 | Feb 14, 2018 | |
| SC 13G | Report | SC 13G | Feb 14, 2018 | |
| SC 13G | Report | SC 13G | Feb 14, 2018 | |
| SC 13G | Report | SC 13 | Feb 14, 2018 |