BlackRock, Inc. 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 |
| 2025-02-05 1:23 pm Sale | 2024-12-31 | 13G | ALTAIR ENGR INC ALTR | BlackRock Inc. BLK | 7,478,856 12.500% | -398,254 (-5.06%) | Filing |
| 2024-07-08 4:32 pm Purchase | 2024-06-30 | 13G | ALTAIR ENGR INC ALTR | BlackRock Inc. BLK | 7,877,110 13.800% | 3,288,603 (+71.67%) | Filing |
| 2024-01-25 4:59 pm Purchase | 2023-12-31 | 13G | ALTAIR ENGR INC ALTR | BlackRock Inc. BLK | 4,588,507 8.400% | 532,043 (+13.12%) | Filing |
| 2023-01-31 1:58 pm Sale | 2022-12-31 | 13G | ALTAIR ENGR INC ALTR | BlackRock Inc. BLK | 4,056,464 7.700% | -483,070 (-10.64%) | Filing |
| 2022-02-03 4:41 pm Purchase | 2021-12-31 | 13G | ALTAIR ENGR INC ALTR | BlackRock Inc. BLK | 4,539,534 8.900% | 254,371 (+5.94%) | Filing |