Updated Jul 16, 2026 · Last SEC filing 2026-07-02
ON SEMICONDUCTOR CORP (ON) has filed 10 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-02. 6 Form 8-K material event filings were reported by ON in the last 90 days. 6 Form 144 notices of proposed sale were filed for ON stock. InsiderAlpha tracks every ON SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Semiconductors & Related Devices (SIC 3674) |
|---|---|
| SEC CIK | 0001097864 |
| Form 4 filings (90d) | 10 |
|---|---|
| Form 8-K filings (90d) | 6 |
| Form 144 notices (90d) | 6 |
| Latest Form 4 filing | 2026-07-02 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| MASCARENAS PAUL ANTHONY | Director | A — Grant or award | 116 | $91.22 | $11K | SEC | |
| GOPALSWAMY SUDHIR | Group President, AMG & ISG | F — Tax withholding / forfeiture | 470 | $127.00 | $60K | SEC | |
| Yan Christine Y | Director | A — Grant or award | 2.0K | $0.00 | — | SEC | |
| CARTER SUSAN K | Director | A — Grant or award | 2.0K | $0.00 | — | SEC | |
| KIDDOO BRUCE E | Director | A — Grant or award | 2.0K | $0.00 | — | SEC | |
| MASCARENAS PAUL ANTHONY | Director | A — Grant or award | 2.0K | $0.00 | — | SEC | |
| Deitrich Thomas | Director | A — Grant or award | 2.0K | $0.00 | — | SEC | |
| WATERS GREGORY L | Director | A — Grant or award | 2.0K | $0.00 | — | SEC | |
| Thad Trent | Exec VP & CFO | S — Open-market sale | 30.0K | $100.00 | $3.00M | SEC | |
| Thad Trent | Exec VP & CFO | S — Open-market sale | 30.0K | $93.00 | $2.79M | SEC | |
| Thad Trent | Exec VP & CFO | S — Open-market sale | 30.0K | $80.00 | $2.40M | SEC | |
| MASCARENAS PAUL ANTHONY | Director | A — Grant or award | 168 | $62.19 | $10K | SEC | |
| GOPALSWAMY SUDHIR | Group President, AMG & ISG | S — Open-market sale | 6.1K | $58.67 | $359K | SEC | |
| Thad Trent | Exec VP & CFO | F — Tax withholding / forfeiture | 10.4K | $69.11 | $718K | SEC | |
| El-Khoury Hassane | CEO & President | F — Tax withholding / forfeiture | 36.8K | $69.11 | $2.54M | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for ON SEMICONDUCTOR CORP (ON). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Thad Trent | 3 | $8.19M |
| MASCARENAS PAUL ANTHONY | 2 | $11K |
| CARTER SUSAN K | 1 | — |
| Deitrich Thomas | 1 | — |
| Yan Christine Y | 1 | — |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in ON 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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