ALTAIR ENGINEERING INC. Form DEFA14A: Additional definitive proxy soliciting materials
Filings on SEC EDGAR, newest first; amendments sit with their base form. Values are as filed.
- 2025-01-16: Form DEFA14A; Description DEFA14A; Document d922889ddefa14a.htm.
- 2024-11-21: Form DEFA14A; Description DEFA14A; Document d858099ddefa14a.htm.
- 2024-11-19: Form DEFA14A; Description DEFA14A; Document d879953ddefa14a.htm.
- 2024-11-08: Form DEFA14A; Description DEFA14A; Document d809416ddefa14a.htm.
| Filed | Form | Period of report | Description | Document |
|---|---|---|---|---|
| 2025-01-16 | DEFA14A | DEFA14A | d922889ddefa14a.htm | |
| 2024-11-21 | DEFA14A | DEFA14A | d858099ddefa14a.htm | |
| 2024-11-19 | DEFA14A | DEFA14A | d879953ddefa14a.htm | |
| 2024-11-08 | DEFA14A | DEFA14A | d809416ddefa14a.htm | |
| 2024-11-08 | DEFA14A | DEFA14A | d872488ddefa14a.htm | |
| 2024-11-07 | DEFA14A | DEFA14A | d858004ddefa14a.htm | |
| 2024-11-04 | DEFA14A | DEFA14A | d858004ddefa14a.htm | |
| 2024-10-31 | DEFA14A | DEFA14A | d880093ddefa14a.htm | |
| 2024-10-31 | DEFA14A | DEFA14A | d887008ddefa14a.htm | |
| 2024-10-30 | DEFA14A | DEFA14A | d890646ddefa14a.htm | |
| 2024-10-30 | DEFA14A | DEFA14A | d859065ddefa14a.htm | |
| 2024-04-05 | DEFA14A | DEFA14A | d722499ddefa14a.htm | |
| 2023-04-25 | DEFA14A | DEFA14A | d421123ddefa14a.htm | |
| 2022-03-30 | DEFA14A | DEFA14A | d287410ddefa14a.htm | |
| 2021-05-20 | DEFA14A | DEFA14A | d247182ddefa14a.htm | |
| 2021-05-13 | DEFA14A | DEFA14A | d528761ddefa14a.htm | |
| 2021-05-13 | DEFA14A | DEFA14A | d528761ddefa14a.htm | |
| 2021-04-09 | DEFA14A | DEFA14A | d76403ddefa14a.htm | |
| 2020-04-09 | DEFA14A | DEFA14A | d873378ddefa14a.htm | |
| 2019-04-04 | DEFA14A | DEFA14A | d692186ddefa14a.htm | |
| 2018-04-26 | DEFA14A | DEFA14A | d553373ddefa14a.htm |