Updated Jul 16, 2026 · Last SEC filing 2024-12-26
Altair Engineering Inc. (ALTR) — no SEC Form 4 insider filings recorded in the last 90 days. InsiderAlpha tracks every ALTR SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SEC CIK | 0001701732 |
|---|
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Brown Matthew Charles | Chief Financial Officer | S — Open-market sale | 1.0K | $108.90 | $114K | SEC | |
| Buckner Stephanie | Chief Operating Officer | M — Option exercise | 1.8K | $0.00 | — | SEC | |
| Dias Nelson | Chief Revenue Officer | M — Option exercise | 22.5K | $0.00 | — | SEC | |
| Dias Nelson | Chief Revenue Officer | S — Open-market sale | 22.5K | $106.23 | $2.39M | SEC | |
| Scapa James Ralph | Chief Executive Officer | S — Open-market sale | 16.1K | $105.65 | $1.70M | SEC | |
| Srikanth Mahalingam | Chief Technology Officer | S — Open-market sale | 1.3K | $105.65 | $137K | SEC | |
| James R. Scapa Declaration of Trust | 10% Owner | S — Open-market sale [10b5-1] | 6.5K | $105.69 | $687K | SEC | |
| Scapa James Ralph | Chief Executive Officer | S — Open-market sale [10b5-1] | 6.5K | $105.69 | $687K | SEC | |
| James R. Scapa Declaration of Trust | 10% Owner | J — Other acquisition / disposition [10b5-1] | 6.5K | $0.00 | — | SEC | |
| Scapa James Ralph | Chief Executive Officer | S — Open-market sale [10b5-1] | 6.5K | $105.69 | $687K | SEC | |
| JRS Investments LLC | 10% Owner | J — Other acquisition / disposition [10b5-1] | 6.5K | $0.00 | — | SEC | |
| Scapa James Ralph | Chief Executive Officer | J — Other acquisition / disposition [10b5-1] | 6.5K | $0.00 | — | SEC | |
| JRS Investments LLC | 10% Owner | S — Open-market sale [10b5-1] | 6.5K | $105.69 | $687K | SEC | |
| Scapa James Ralph | Chief Executive Officer | J — Other acquisition / disposition [10b5-1] | 6.5K | $0.00 | — | SEC | |
| Srikanth Mahalingam | Chief Technology Officer | M — Option exercise | 6.0K | $0.00 | — | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Altair Engineering Inc. (ALTR). Updated in real time as new filings are submitted to the SEC.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in ALTR insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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