ON Semiconductor (ON) insider buying and selling
Every Table I transaction reported by directors and officers of S&P 500 companies on SEC Form 4 filings (2 business days to file): each row labeled with its official transaction code, nothing filtered out beforehand.
Open-market purchases (code P) are the rare signal, in green; sales (code S) are common and often pre-scheduled (10b5-1). Table II (derivatives) is not included: its prices are exercise prices, not market values. Guide: insider buying.
| Date | Ticker | Insider | Role | Shares | Price | Amount | % of stake | Type / filing |
|---|
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ON Semiconductor Corporation (ON) insider buying and selling: no purchases, 10 sales
46 Form 4 Table I transactions filed with the SEC by ON Semiconductor Corporation insiders between 2025-10-06 and 2026-10-02 (15-month history): 0 open-market purchases and 10 sales, plus 36 transactions under other Form 4 codes, broken down one by one below. The largest open-market trade is a sale of $4.3M by Thad Trent on 2026-02-12.
ON Semiconductor insider buying and selling over the last 12 months
Between Oct 21, 2025 and Oct 20, 2026, ON Semiconductor insiders filed 10 sales worth $21.3M on the open market, and no purchases.
The biggest seller was Thad Trent (Exec VP & CFO): $13.6M in 5 sales, out of 4 different sellers.
The largest trade of the period was a sale of $4.3M on Feb 12, 2026, by Thad Trent (Exec VP & CFO), under a 10b5-1 plan. Form 4 on sec.gov (0001225208-26-001829).
Of the 10 sales, 5 (50%, $13.7M) carry the 10b5-1 plan flag on the Form 4, meaning they were scheduled months ahead; the other 5 do not.
The last three months show 1 sale, against 2 in the three before. The latest sale from Oct 1, 2026.
Against its sector (Technology, 85 companies with an insider page on this site), over the same dates the median is 22 sales and 0 purchases on the open market. ON Semiconductor has more sales than 22 of the other 84, ranks 52 of 85 by net dollars sold, and 32 of the 85 have at least one purchase.
The 20 most important trades
With no open-market purchases, the table starts with ON's sales, largest first. The full history is in the tool above, already searched.
See all 46 ON trades in the full history →
| Trade date | Filed | Insider | Role | Amount | Code | Filing |
|---|---|---|---|---|---|---|
| 2026-02-12 | 2026-02-12 | Thad Trent | Exec VP & CFO | $4.3M | S — Open-market sale (scheduled 10b5-1)4 Form 4 footnotesF2 This disposition transaction was executed in multiple trades at prices ranging from $71.25 to $72.17. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. F3 This disposition transaction was executed in multiple trades at prices ranging from $73.27 to $73.61. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. F4 This disposition transaction was executed in multiple trades at prices ranging from $72.27 to $73.23. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. F5 This disposition transaction was executed in multiple trades at prices ranging from $70.24 to $71.23. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. | SEC |
| 2026-02-17 | 2026-02-18 | Keeton Simon | Group President, PSG | $3.5M | S — Open-market sale | SEC |
| 2026-04-24 | 2026-04-27 | Thad Trent | Exec VP & CFO | $3.0M | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-04-23 | 2026-04-27 | Thad Trent | Exec VP & CFO | $2.8M | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-04-16 | 2026-04-17 | Thad Trent | Exec VP & CFO | $2.4M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 Includes an additional 115 shares that were acquired by the Reporting Person under the Issuer's Employee Stock Purchase Plan since his last Section 16 filing. | SEC |
| 2026-02-12 | 2026-02-12 | El-Khoury Hassane | CEO & President | $1.5M | S — Open-market saleForm 4 footnoteF2 This disposition transaction was executed in multiple trades at prices ranging from $72.53 to $73.52. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. | SEC |
| 2026-10-01 | 2026-10-02 | Gopalswamy Sudhir | Group President, AMG & ISG | $1.2M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 Includes an additional 167 shares that were acquired by the Reporting Person under the Issuer's Employee Stock Purchase Plan since his last Section 16 filing. | SEC |
| 2025-12-04 | 2025-12-08 | Keeton Simon | Group President, PSG | $1.2M | S — Open-market sale2 Form 4 footnotesF1 This disposition transaction was executed in multiple trades at prices ranging from $55.70 to $55.76. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. F2 Includes an additional 372 shares that were acquired by the Reporting Person under the Issuer's Employee Stock Purchase Plan since his last Section 16 filing. | SEC |
| 2025-12-03 | 2025-12-04 | Thad Trent | Exec VP & CFO | $1.1M | S — Open-market sale2 Form 4 footnotesF1 This disposition transaction was executed in multiple trades at prices ranging from $54.85 to $55.26. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. F2 Includes an additional 372 shares that were acquired by the Reporting Person under the Issuer's Employee Stock Purchase Plan since his last Section 16 filing. | SEC |
| 2026-03-13 | 2026-03-16 | Gopalswamy Sudhir | Group President, AMG & ISG | $359k | S — Open-market sale | SEC |
| 2026-02-21 | 2026-02-24 | El-Khoury Hassane | CEO & President | $2.5M | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Represents shares withheld to cover taxes due upon the vesting of restricted stock units. | SEC |
| 2026-02-06 | 2026-02-09 | El-Khoury Hassane | CEO & President | $2.2M | F — Tax withholding (shares surrendered for taxes)2 Form 4 footnotesF4 Represents shares withheld to cover taxes due upon the vesting of performance-based restricted stock units. F5 Includes an additional 246 shares that were acquired by the Reporting Person under the Issuer's Employee Stock Purchase Plan since his last Section 16 filing. | SEC |
| 2026-02-10 | 2026-02-12 | El-Khoury Hassane | CEO & President | $1.4M | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF1 Represents shares withheld to cover taxes due upon the vesting of performance-based restricted stock units. | SEC |
| 2026-02-06 | 2026-02-09 | Thad Trent | Exec VP & CFO | $800k | F — Tax withholding (shares surrendered for taxes)2 Form 4 footnotesF4 Represents shares withheld to cover taxes due upon the vesting of performance-based restricted stock units. F5 Includes an additional 129 shares that were acquired by the Reporting Person under the Issuer's Employee Stock Purchase Plan since his last Section 16 filing. | SEC |
| 2026-02-21 | 2026-02-24 | Thad Trent | Exec VP & CFO | $718k | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Represents shares withheld to cover taxes due upon the vesting of restricted stock units. | SEC |
| 2026-02-21 | 2026-02-24 | Gopalswamy Sudhir | Group President, AMG & ISG | $662k | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Represents shares withheld to cover taxes due upon the vesting of restricted stock units. | SEC |
| 2026-02-06 | 2026-02-09 | Keeton Simon | Group President, PSG | $602k | F — Tax withholding (shares surrendered for taxes)2 Form 4 footnotesF4 Represents shares withheld to cover taxes due upon the vesting of performance-based restricted stock units. F5 Includes an additional 129 shares that were acquired by the Reporting Person under the Issuer's Employee Stock Purchase Plan since his last Section 16 filing. | SEC |
| 2026-02-21 | 2026-02-24 | Keeton Simon | Group President, PSG | $538k | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Represents shares withheld to cover taxes due upon the vesting of restricted stock units. | SEC |
| 2026-02-10 | 2026-02-12 | Thad Trent | Exec VP & CFO | $452k | F — Tax withholding (shares surrendered for taxes) (scheduled 10b5-1)Form 4 footnoteF1 Represents shares withheld to cover taxes due upon the vesting of performance-based restricted stock units. | SEC |
| 2026-02-10 | 2026-02-12 | Gopalswamy Sudhir | Group President, AMG & ISG | $417k | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF1 Represents shares withheld to cover taxes due upon the vesting of performance-based restricted stock units. | SEC |
The period balance: money in, money out
In the Form 4 filings submitted between Oct 6, 2025 and Oct 2, 2026 there is not one open-market purchase of ON Semiconductor Corporation: 10 sales worth $21.3M and zero dollars bought.
Only codes P and S count, where an insider puts in or takes out their own money. A selling balance like ON Semiconductor Corporation's is the norm in the S&P 500, where much of the pay comes as stock. It is not a recommendation to buy or sell: it is what was filed.
Every transaction, code by code
| Code | What it means | Trades | Reported amount |
|---|---|---|---|
| A | Grant or award | 19 | $53k |
| F | Tax withholding (shares surrendered for taxes) | 16 | $11.8M |
| S | Open-market sale | 10 | $21.3M |
| G | Gift | 1 | $0 |
| Total | Everything filed in the period | 46 | $33.1M |
15 of the 46 rows carry no usable amount on the Form 4: they count as trades and add $0. The code labels come from the SEC index.
Who has traded
Over the 15 months of history, 10 distinct people or entities have filed ON Semiconductor Corporation transactions: none bought on the open market and 4 sold. Counted by CIK, the fixed number the SEC gives each filer, and not by name, which each filer types their own way.
| Filer | Role | Transactions | Bought (count) | Sold (count) | Last filed |
|---|---|---|---|---|---|
| Thad Trent | Exec VP & CFO | 11 | — | $13.6M (5) | 2026-04-27 |
| Keeton Simon | Group President, PSG | 8 | — | $4.7M (2) | 2026-02-24 |
| Gopalswamy Sudhir | Group President, AMG & ISG | 9 | — | $1.6M (2) | 2026-10-02 |
| El-Khoury Hassane | CEO & President | 6 | — | $1.5M (1) | 2026-02-24 |
| Mascarenas Paul Anthony | Director | 6 | — | — | 2026-10-02 |
| Kiddoo Bruce E | Director | 2 | — | — | 2026-05-18 |
| Carter Susan K | Director | 1 | — | — | 2026-05-18 |
| Deitrich Thomas | Director | 1 | — | — | 2026-05-18 |
Shown here are the 8 who moved the most money, out of 10. The rest are in the full history, one link above. The name links to all their trades, in any company. "Transactions" counts any code; the money, open market only. Role: from their latest filing.
Month by month
By the month the trade was executed, not the month it was filed; months with no trades show zero. The busiest month was Feb 2026: 0 purchases and 3 sales, worth $9.2M. 10 of the 15 months have none.
| Month | Purchases | Amount | Sales | Amount |
|---|---|---|---|---|
| Aug 2025 | 0 | $0 | 0 | $0 |
| Sep 2025 | 0 | $0 | 0 | $0 |
| Oct 2025 | 0 | $0 | 0 | $0 |
| Nov 2025 | 0 | $0 | 0 | $0 |
| Dec 2025 | 0 | $0 | 2 | $2.3M |
| Jan 2026 | 0 | $0 | 0 | $0 |
| Feb 2026 | 0 | $0 | 3 | $9.2M |
| Mar 2026 | 0 | $0 | 1 | $359k |
| Apr 2026 | 0 | $0 | 3 | $8.2M |
| May 2026 | 0 | $0 | 0 | $0 |
| Jun 2026 | 0 | $0 | 0 | $0 |
| Jul 2026 | 0 | $0 | 0 | $0 |
| Aug 2026 | 0 | $0 | 0 | $0 |
| Sep 2026 | 0 | $0 | 0 | $0 |
| Oct 2026 | 0 | $0 | 1 | $1.2M |
The last month may be partial: a Form 4 is filed up to two business days later. The table does not say whether the pattern is good or bad; it says when it happened.
ON Semiconductor Corporation (ON) analysis page →
Other Technology companies with insider trades
All 500 are listed in the section index →
Which insiders are buying their own company stock →
How to read this data
5 of the 10 sales in the table are flagged as scheduled (10b5-1 plan): signed months ahead and executed automatically, so they say nothing about what the insider thinks today. ON Semiconductor has no open-market purchase (code P) in the history, the most common case in the S&P 500: insiders are already paid in stock. The latest filing is from Oct 2, 2026, and a Form 4 arrives up to two business days after the trade.
16 of the 20 rows in the table carry footnotes from the Form 4 itself, folded into the code column and copied verbatim; a row with no footnote means the filing has none.
Guide: Insider buying · all guides
What is behind these trades
The concepts on this page, explained from scratch in the Academy. Free, no account.
- What the efficiency hypothesis says and what it does NOT sayIf an insider's purchase is public and anyone can read it, is there any information left in it? That is the exact question that brings people here.
- Who really moves the market: the types of investorWho sits on the other side of each order, and where a company's own insiders fit among them.
- Supply, demand and price: why it rises and falls constantlyHow a piece of news ends up inside the price, and why the reaction to a filed sale is rarely the one you would expect.
Source: SEC EDGAR Form 4. This is a list of public facts, not financial advice or a recommendation to buy or sell.