ON Semiconductor officer proposes selling 15,578 shares

The notice identifies the Sudhir Gopalswamy Living Trust as the source of the shares and lists stock awards as their acquisition method.

Rhea-AI Filing Summary

ON Semiconductor Corp. (ON) officer Sudhir Gopalswamy is named in a Rule 144 notice covering a proposed sale of 15,578 common shares, with an approximate sale date of October 1, 2026. The notice identifies the Sudhir Gopalswamy Living Trust as the source of the shares and lists an aggregate market value of $1,246,240. Rockefeller Capital Management is listed as broker, and the acquisition records identify stock awards from the issuer.

Key Figures

Common shares in proposed sale: 15,578 shares Aggregate market value: $1,246,240 Approximate sale date: October 1, 2026 +3 more

6 metrics

Common shares in proposed sale 15,578 shares Proposed sale in the notice

Aggregate market value $1,246,240 Common shares covered by the notice

Approximate sale date October 1, 2026 Proposed sale

Stock award shares 4,536 shares Award dated February 7, 2025

Stock award shares 2,204 shares Award dated February 7, 2025

Stock award shares 8,838 shares Award dated April 22, 2024

Key Terms

Rule 144, aggregate market value, Stock Award

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

aggregate market value financial

"Number of shares to be sold; aggregate market value"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

Stock Award financial

"How acquired: Stock Award"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many ON shares is Sudhir Gopalswamy planning to sell?

The notice covers a proposed sale of 15,578 ON Semiconductor common shares, with an approximate sale date of October 1, 2026; the shares are from the Sudhir Gopalswamy Living Trust.

How were the ON shares in Sudhir Gopalswamy's sale notice acquired?

The acquisition records identify stock awards from the issuer: 4,536 shares and 2,204 shares dated February 7, 2025, and 8,838 shares dated April 22, 2024.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/01/2026 - 04:35 PM Accepted by SEC EDGAR 10/01/2026 - 04:35 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001722291
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	ON SEMICONDUCTOR CORP
SEC File Number	001-39317
Address of Issuer	5701 NORTH PIMA ROAD SCOTTSDALE ARIZONA 85250
Phone	6022446600
Name of Person for Whose Account the Securities are To Be Sold	GOPALSWAMY SUDHIR
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Rockefeller Capital Management 1850 MT. Diablo BLVD, Suite 300 Walnut Creek CA 94596	15578	1246240.00	389311721	10/01/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	02/07/2025	Stock Award	Isuer			4536	02/07/2025	Compensation
Common	02/07/2025	Stock Award	Issuer			2204	02/07/2025	Compensation
Common	04/22/2024	Stock Award	Issuer			8838	04/22/2024	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks	Shares sold from the following trust: SUDHIR GOPALSWAMY LIVING TRUST
Date of Notice	10/01/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/14/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Carmen Zamores as a duly authorized representative of National Financial Services LLC, as attorney-in-fact for GOPALSWAMY SUDHIR
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)