On Semiconductor 4: GOPALSWAMY SUDHIR bought 31,834 shares of Common at $N/A on… (Feb 24, 2026)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-02-20 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: ON SEMICONDUCTOR CORP (ON) CIK: 0001097864 --- Reporting Owner --- Name: GOPALSWAMY SUDHIR CIK: 0001722291 Role: Officer (Group President, AMG & ISG) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Date: 2026-02-20 | Code: A (Grant or award) Shares: +31,834 | Price: $0.00 Shares Owned After: 191,095 | Ownership: D (Direct) Footnotes: [F1] 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. [Transaction #2] Security: Common Date: 2026-02-20 | Code: F (Payment of exercise/tax) Shares: -1,455 | Price: $69.11 Total Value: $100,555.05 Shares Owned After: 189,640 | Ownership: D (Direct) Footnotes: [F2] Represents shares withheld to cover taxes due upon the vesting of restricted stock units. [Transaction #3] Security: Common Date: 2026-02-21 | Code: F (Payment of exercise/tax) Shares: -9,583 | Price: $69.11 Total Value: $662,281.13 Shares Owned After: 180,057 | Ownership: D (Direct) Footnotes: [F2] Represents shares withheld to cover taxes due upon the vesting of restricted stock units. --- Footnotes (Complete Index) --- F1: 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. F2: Represents shares withheld to cover taxes due upon the vesting of restricted stock units. --- Signature --- /s/ /s/ Hope M. Spencer, Attorney-in-Fact (2026-02-24)