Buckner Stephanie (CIK 1839690) reported 7 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2025-03-26). Recent activity: Sell ALTR (7,588 shares), Sell ALTR (31,352 shares), Sell ALTR (47 shares), Buy ALTR (323 shares), Sell ALTR (62 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2025-03-26 | Altair Engineering Inc. (ALTR) | Chief Operating Officer | Sell | 7,588 | $857,444 |
| 2025-03-26 | Altair Engineering Inc. (ALTR) | Chief Operating Officer | Sell | 31,352 | $3.5M |
| 2025-03-19 | Altair Engineering Inc. (ALTR) | Chief Operating Officer | Sell | 47 | $5,231 |
| 2025-03-05 | Altair Engineering Inc. (ALTR) | Chief Operating Officer | Buy | 323 | $0 |
| 2025-03-05 | Altair Engineering Inc. (ALTR) | Chief Operating Officer | Sell | 62 | $6,910 |
| 2025-02-14 | Altair Engineering Inc. (ALTR) | Chief Operating Officer | Buy | 9,923 | $0 |
| 2025-01-16 | Altair Engineering Inc. (ALTR) | Chief Operating Officer | Buy | 73 | $6,017 |
Source: SEC Form 4 filings · as of 2025-03-26