The SEC lists ON SEMICONDUCTOR CORP under CIK 0001097864, in semiconductors and related devices. It is grouped with Information Technology companies on this site. The registration was withdrawn on 2 October 2026, so the planned offering is not going ahead in its filed form.
ON Form 4 activity by transaction type, last 90 days
Form 4 transaction type
Transactions
Shares
Total value
Open-market sale
1
15,578
$1.25M
Grant or award
1
126
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
ON insider transactions (Form 4)
58
48 Form 4 filings on record, the earliest from Oct 16, 2024, newest first. Filing history page 1 of 2.
Footnote F1 (shares): Represents fully-vested shares of common stock issued to the Reporting Person in lieu of a portion of his quarterly cash retainers for the third quarter of 2026 based on his previously-submitted election.
Footnote F1 (shares): Represents fully-vested shares of common stock issued to the Reporting Person in lieu of a portion of his quarterly cash retainers for the second quarter of 2026 based on his previously-submitted election.
Footnote F1 (shares): Represents restricted stock granted under the Issuer's Amended and Restated Stock Incentive Plan on May 14, 2026. The stock will vest on the day prior to the Issuer's next Annual Meeting of Stockholders.
Footnote F1 (shares): Represents restricted stock granted under the Issuer's Amended and Restated Stock Incentive Plan on May 14, 2026. The stock will vest on the day prior to the Issuer's next Annual Meeting of Stockholders.
Footnote F1 (shares): Represents restricted stock granted under the Issuer's Amended and Restated Stock Incentive Plan on May 14, 2026. The stock will vest on the day prior to the Issuer's next Annual Meeting of Stockholders.
Footnote F1 (shares): Represents restricted stock units granted under the Issuer's Amended and Restated Stock Incentive Plan on May 14, 2026. The award will vest on the day prior to the Issuer's next Annual Meeting of Stockholders; however, issuance of the shares underlying the award will be deferred… Full note on SEC EDGAR
Footnote F1 (shares): Represents restricted stock granted under the Issuer's Amended and Restated Stock Incentive Plan on May 14, 2026. The stock will vest on the day prior to the Issuer's next Annual Meeting of Stockholders.
Footnote F1 (shares): Represents restricted stock units granted under the Issuer's Amended and Restated Stock Incentive Plan on May 14, 2026. The award will vest on the day prior to the Issuer's next Annual Meeting of Stockholders; however, issuance of the shares underlying the award will be deferred… Full note on SEC EDGAR
Footnote F1 (shares): Represents fully-vested shares of common stock issued to the Reporting Person in lieu of a portion of his quarterly cash retainers for the first quarter of 2026 based on his previously-submitted election.
Footnote F1 (shares): Represents time-based restricted stock units that will vest in three equal annual installments beginning on the first anniversary of the grant date, subject to the Reporting Person's continued employment through the applicable vesting date.
Footnote F2 (shares): Represents shares withheld to cover taxes due upon the vesting of restricted stock units.
Footnote F1 (shares): Represents time-based restricted stock units that will vest in three equal annual installments beginning on the first anniversary of the grant date, subject to the Reporting Person's continued employment through the applicable vesting date.
Footnote F2 (shares): Represents shares withheld to cover taxes due upon the vesting of restricted stock units.
Footnote F1 (shares): Represents time-based restricted stock units that will vest in three equal annual installments beginning on the first anniversary of the grant date, subject to the Reporting Person's continued employment through the applicable vesting date.
Footnote F2 (shares): Represents shares withheld to cover taxes due upon the vesting of restricted stock units.
Footnote F1 (shares): Represents time-based restricted stock units that will vest in three equal annual installments beginning on the first anniversary of the grant date, subject to the Reporting Person's continued employment through the applicable vesting date.
Footnote F2 (shares): Represents shares withheld to cover taxes due upon the vesting of restricted stock units.
Footnote F1 (shares): Represents shares withheld to cover taxes due upon the vesting of performance-based restricted stock units.
Footnote F2 (shares): 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… Full note on SEC EDGAR
Footnote F1 (shares): Represents shares withheld to cover taxes due upon the vesting of performance-based restricted stock units.
Footnote F2 (price): 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… Full note on SEC EDGAR
Footnote F3 (price): 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… Full note on SEC EDGAR
Footnote F4 (price): 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… Full note on SEC EDGAR
Footnote F5 (price): 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… Full note on SEC EDGAR
Footnote F1 (shares): Represents the subset of an award of performance-based restricted stock units, originally granted to the Reporting Person on February 21, 2025, that were earned based on the Issuer's performance as measured against the underlying metrics. These units will vest in three annual… Full note on SEC EDGAR
Footnote F2 (shares): Represents the subset of an award of performance-based restricted stock units, originally granted to the Reporting Person on February 21, 2024, that (a) were earned based on the Issuer's performance as measured against the underlying metrics and (b) will vest on February 6, 2025.
Footnote F3 (shares): Represents the subset of an award of performance-based restricted stock units, originally granted to the Reporting Person on February 20, 2023, that (a) were earned based on the Issuer's performance as measured against the underlying metrics and (b) will vest on February 6, 2026.
Footnote F4 (shares): Represents the subset of an award of performance-based restricted stock units, originally granted to the Reporting Person on May 26, 2023, that (a) were earned based on the Issuer's performance as measured against the underlying metrics and (b) will vest on February 6, 2026.
Footnote F5 (shares): Represents shares withheld to cover taxes due upon the vesting of performance-based restricted stock units.
Footnote F1 (shares): Represents the subset of an award of performance-based restricted stock units, originally granted to the Reporting Person on February 21, 2025, that were earned based on the Issuer's performance as measured against the underlying metrics. These units will vest in three annual… Full note on SEC EDGAR
Footnote F2 (shares): Represents the subset of an award of performance-based restricted stock units, originally granted to the Reporting Person on February 20, 2023, that (a) were earned based on the Issuer's performance as measured against the underlying metrics and (b) will vest on February 6, 2026.
Footnote F3 (shares): Represents the subset of an award of performance-based restricted stock units, originally granted to the Reporting Person on February 21, 2024, that (a) were earned based on the Issuer's performance as measured against the underlying metrics and (b) will vest on February 6, 2026.
Footnote F4 (shares): Represents shares withheld to cover taxes due upon the vesting of performance-based restricted stock units.
Footnote F1 (shares): Represents the subset of an award of performance-based restricted stock units, originally granted to the Reporting Person on February 21, 2025, that were earned based on the Issuer's performance as measured against the underlying metrics. These units will vest in three annual… Full note on SEC EDGAR
Footnote F2 (shares): Represents the subset of an award of performance-based restricted stock units, originally granted to the Reporting Person on February 20, 2023, that (a) were earned based on the Issuer's performance as measured against the underlying metrics and (b) will vest on February 6, 2026.
Footnote F3 (shares): Represents the subset of an award of performance-based restricted stock units, originally granted to the Reporting Person on February 21, 2024, that (a) were earned based on the Issuer's performance as measured against the underlying metrics and (b) will vest on February 6, 2026.
Footnote F4 (shares): Represents shares withheld to cover taxes due upon the vesting of performance-based restricted stock units.
Footnote F1 (shares): Represents the subset of an award of performance-based restricted stock units, originally granted to the Reporting Person on February 21, 2025, that were earned based on the Issuer's performance as measured against the underlying metrics. These units will vest in three annual… Full note on SEC EDGAR
Footnote F2 (shares): Represents the subset of an award of performance-based restricted stock units, originally granted to the Reporting Person on February 21, 2023, that (a) were earned based on the Issuer's performance as measured against the underlying metrics and (b) will vest on February 6, 2026.
Footnote F3 (shares): Represents the subset of an award of performance-based restricted stock units, originally granted to the Reporting Person on February 21, 2024, that (a) were earned based on the Issuer's performance as measured against the underlying metrics and (b) will vest on February 6, 2026.
Footnote F4 (shares): Represents shares withheld to cover taxes due upon the vesting of performance-based restricted stock units.
Footnote F1 (price): 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… Full note on SEC EDGAR
Footnote F1 (shares): Represents fully-vested shares of common stock issued to the Reporting Person in lieu of a portion of his quarterly cash retainers for the third quarter of 2025 based on his previously-submitted election.
An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
ON SEMICONDUCTOR CORP (ON) had 2 insider filings in the last 90 days, with the most recent on 2026-10-02. The full record for ON runs to 48 Form 4 filings, the earliest from 2024-10-16. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying ON stock?
No insider purchases of ON were filed in the last 90 days.
How many insiders are selling ON stock?
1 insider sale of ON was filed in the last 90 days, totaling $1.25M.
Where can I see ON SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects ON Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Information Technology companies with insider activity
House of Representatives Periodic Transaction Reports from 2024. Senate filings are not included yet. The full history of ON beside its insider purchases is in the Congress Tracker.