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ON Semiconductor ON

ON Semiconductor is the 331st largest S&P 500 company by market cap, worth $28.1 billion. 7 directors have filed with the SEC in the last 12 months (who counts), 1 of them an executive. 3 other officers are on file. At 30 Jun 2026, Fidelity (FMR) was its largest institutional holder, with 14.5% of the company.

CEO
Hassane El-Khoury
Sector
Information Technology
Sub-industry
Semiconductors
Headquarters
Phoenix, Arizona
Founded
1999
More
Wikipedia
Market cap
$28.1B
331st largest, 23 Oct 2026 close
Revenue
$6.0B
Fiscal year 2025
Price to sales
4.7
Market cap over revenue
Employees
22,670
10-K, 31 Dec 2025
Market cap per employee
$1.2M
Market cap over employees
Connections
4
S&P 500 companies sharing a director or officer

Largest institutional holders

Each fund group's share of ON Semiconductor. Where a company has several share classes, the share is of its total value.

13F filings for the quarter to 30 Jun 2026

These five hold 45.7% of ON Semiconductor.

Source: SEC Form 13F data sets, SEC XBRL shares outstanding 路 All holders

Board and officers

3 people here also hold roles at other S&P 500 companies.

Roles filed up to 30 Sep 2026

NameTitle
Directors (7)
Hassane El-KhouryCEO & PresidentLast filed 24 Feb 2026CEO & President
Susan K. CarterDirectorAlso at Amcor and Stanley Black & DeckerDirector
Thomas DeitrichDirectorDirector
Bruce E. KiddooDirectorAlso at Western DigitalDirector
Paul Anthony MascarenasDirectorDirector
Gregory L. WatersDirectorDirector
Christine Y. YanDirectorDirector
Officers (3)
Trent ThadExec VP & CFOAlso at LumentumLast filed 27 Apr 2026Exec VP & CFO
Sudhir GopalswamyGroup President, AMG & ISGLast filed 27 May 2026Group President, AMG & ISG
Achyut ShahGroup President, PSGLast filed 22 May 2026Group President, PSG

Source: SEC insider filings (Forms 3, 4 and 5), ON Semiconductor's Form 4 filings 路 All directors and officers

Companies that share people with ON Semiconductor

Each person's title here, then at the other company.

  • Amcor AMCR
    • Susan K. Carter: Director here, Director there
  • Lumentum LITE
    • Trent Thad: Exec VP & CFO here, Director there
  • Stanley Black & Decker SWK
    • Susan K. Carter: Director here, Director there
  • Western Digital WDC
    • Bruce E. Kiddoo: Director here, Director there

Source: SEC insider filings 路 See the whole network

ON Semiconductor's market cap since December 2008

Marked weeks are changes in the share count, such as a merger, not market moves.

Weekly, up to 23 Oct 2026

Show equal percentage changes as equal steps.
201020122014201620182020202220242026$28.1B

Source: Yahoo Finance closing prices, SEC XBRL shares outstanding

Workforce

Headcount at 31 Dec 2025

Employees
22,670
As of December 31, 2025, we had approximately 22,600 regular full鈥憈ime employees and about 70 part鈥憈ime or temporary employees across 33 countries.
ON Semiconductor Form 10-K

Source: ON Semiconductor Form 10-K

Insider trades

Open-market buys and sales by directors and officers. Grants, option exercises and shares withheld for tax are left out.

Trades from 30 Sep 2025 to 30 Sep 2026

Directors and officers sold $20.1 million of stock in 9 sales and made no open-market purchases in the 12 months to 30 Sep 2026.

DatePersonTitleTypeSharesValue
24 Apr 2026SaleTrent ThadExec VP & CFOExec VP & CFOSale30,000$3.0M
23 Apr 2026SaleTrent ThadExec VP & CFOExec VP & CFOSale30,000$2.8M
16 Apr 2026SaleTrent ThadExec VP & CFOExec VP & CFOSale30,000$2.4M
13 Mar 2026SaleSudhir GopalswamyGroup President, AMG & ISGGroup President, AMG & ISGSale6,114$359K
17 Feb 2026SaleSimon KeetonGroup President, PSGGroup President, PSGSale48,860$3.5M
12 Feb 2026SaleTrent ThadExec VP & CFOExec VP & CFOSale60,000$4.3M
12 Feb 2026SaleHassane El-KhouryCEO & PresidentCEO & PresidentSale20,000$1.5M
4 Dec 2025SaleSimon KeetonGroup President, PSGGroup President, PSGSale21,000$1.2M
3 Dec 2025SaleTrent ThadExec VP & CFOExec VP & CFOSale20,000$1.1M

Source: SEC insider transactions data sets, ON Semiconductor's Form 4 filings

Trades by members of Congress and officials

Trades members of Congress and senior executive branch officials disclosed, including their families'. Amounts are filed as ranges.

Trades from 20 Oct 2023 to 20 Oct 2026

6 people disclosed 14 purchases and 12 sales of ON Semiconductor stock since October 2023.

DateMember or officialTypeAmount
28 Sep 2026Gilbert Cisneros (House, D-CA)House, D-CA 路 BoughtPurchase$15,001 to $50,000$15K to $50K
23 Sep 2026Rohit Khanna (House, D-CA)House, D-CA 路 BoughtPurchase$15,001 to $50,000$15K to $50K
27 Jul 2026Rohit Khanna (House, D-CA)House, D-CA 路 BoughtPurchase$1,001 to $15,000$1K to $15K
7 Jul 2026Rohit Khanna (House, D-CA)House, D-CA 路 SoldSale$1,001 to $15,000$1K to $15K
15 Apr 2026Donald J Trump (President)President 路 BoughtPurchase$1,001 to $15,000$1K to $15K
9 Apr 2026Donald J Trump (President)President 路 SoldSale$100,001 to $250,000$100K to $250K
7 Apr 2026Donald J Trump (President)President 路 BoughtPurchase$1,001 to $15,000$1K to $15K
19 Feb 2026Donald J Trump (President)President 路 BoughtPurchase$1,001 to $15,000$1K to $15K
10 Feb 2026Donald J Trump (President)President 路 BoughtPurchase$50,001 to $100,000$50K to $100K
29 Jan 2026Rohit Khanna (House, D-CA)House, D-CA 路 SoldSale$1,001 to $15,000$1K to $15K

Showing 10 of 26 trades

Source: House, Senate and OGE disclosures via the Congress trading monitor

Not on file: no WARN layoff notices under its own name since October 2023.