The Vanguard Group 13D and 13G filings for Altair Engineering Inc.:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2024-02-13 4:58 pm Purchase | 2023-12-29 | 13G | Altair Engineering Inc. ALTR | The Vanguard Group | 5,761,445 10.550% | 354,040 (+6.55%) | Filing |
| 2023-06-09 2:15 pm Purchase | 2023-05-31 | 13G | Altair Engineering Inc. ALTR | The Vanguard Group | 5,407,405 10.120% | 202,241 (+3.89%) | Filing |
| 2023-02-09 11:07 am Purchase | 2022-12-30 | 13G | Altair Engineering Inc. ALTR | The Vanguard Group | 5,205,164 9.930% | 577,415 (+12.48%) | Filing |
| 2022-02-09 3:24 pm Purchase | 2021-12-31 | 13G | Altair Engineering Inc. ALTR | The Vanguard Group | 4,627,749 9.110% | 576,927 (+14.24%) | Filing |
| 2021-02-10 10:30 am Purchase | 2020-12-31 | 13G | Altair Engineering Inc. ALTR | The Vanguard Group | 4,050,822 9.370% | 418,987 (+11.54%) | Filing |