The largest holder of ON Semiconductor stock is Fidelity Management & Research Co. LLC, with 56.7 million shares (14.56% of the company), worth about $4.20 billion as of September 25, 2026. The 10 largest holders together own 52.3%.
In Q2 2026, 1,093 institutional holdings reports listed shares worth $38.70 billion.
Insiders reported 46 transactions in the last two years: 16 sales worth $25.20 million and no purchases. The newest one on file is from April 24, 2026 (Thad Trent, Chief Financial Officer).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through April 24, 2026.

2026Q2
| Holder | Shares | % of company | Value |
|---|---|---|---|
| Fidelity Management & Research Co. LLC | 56.7 million | 14.56% | $4.2B |
| BlackRock Advisors LLC | 33.1 million | 8.51% | $2.5B |
| Vanguard Capital Management LLC | 25.6 million | 6.58% | $1.9B |
| Vanguard Portfolio Management LLC | 19.6 million | 5.04% | $1.5B |
| State Street Corporation | 18.6 million | 4.77% | $1.4B |
| Janus Henderson Investors US LLC | 13.4 million | 3.45% | $995.0M |
| Geode Capital Management LLC | 10.8 million | 2.78% | $803.0M |
| JPMorgan Investment Management, Inc. | 10.1 million | 2.60% | $750.0M |
| Goldman Sachs Asset Management LP | 7.9 million | 2.02% | $584.0M |
| Norges Bank (13F) | 7.9 million | 2.02% | $582.0M |
As of September 25, 2026.
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 1,093 | – | $38.7B |
| Q1 2026 | 909 | 407.0 million | $25.1B |
| Q4 2025 | 879 | – | $22.9B |
| Q3 2025 | 858 | – | $21.7B |
| Q2 2025 | 879 | 436.0 million | $22.8B |
| Q1 2025 | 828 | 418.0 million | $17.0B |
| Q4 2024 | 930 | 420.0 million | $26.4B |
| Q3 2024 | 927 | 445.0 million | $31.6B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Thad Trent | Apr 24, 2026 | Chief Financial Officer | Sale at price 93.00 - 100.00 per share. | $5.8M |
| Thad Trent | Apr 16, 2026 | Chief Financial Officer | Sale at price 80.00 per share. | $2.4M |
| Mascarenas Paul Anthony | Apr 2, 2026 | Director | Stock Award(Grant) at price 62.19 per share. | $10,448 |
| Gopalswamy Sudhir | Mar 13, 2026 | Officer | Sale at price 58.67 per share. | $358,708 |
| Thad Trent | Feb 20, 2026 | Chief Financial Officer | Stock Award(Grant) at price 0.00 per share. | – |
| El Khoury Hassane | Feb 20, 2026 | Chief Executive Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Gopalswamy Sudhir | Feb 20, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Keeton Simon | Feb 20, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Keeton Simon | Feb 17, 2026 | Officer | Sale at price 71.56 - 71.77 per share. | $3.5M |
| El Khoury Hassane | Feb 12, 2026 | Chief Executive Officer | Sale at price 73.02 - 73.56 per share. | $1.5M |
| Thad Trent | Feb 12, 2026 | Chief Financial Officer | Sale at price 70.87 - 73.39 per share. | $4.3M |
| Kiddoo Bruce E | Feb 12, 2026 | Director | Stock Gift at price 0.00 per share. | – |
Newest 12 of 46 insider transactions in the last two years.
Fidelity Management & Research Co. LLC, with 14.56% of the company (as of September 25, 2026). Next: BlackRock Advisors LLC (8.51%) and Vanguard Capital Management LLC (6.58%).
1,093 institutional holdings reports listed ON Semiconductor shares in Q2 2026 worth $38.70 billion.
In the last two years insiders reported 16 sales and no purchases (46 transactions in all); the newest on file is from April 24, 2026.