X0306 4 2018-03-22 0001097864 ON SEMICONDUCTOR CORP ON 0001558921 GUTMANN BERNARD 5005 EAST MCDOWELL ROAD PHOENIX AZ 85008 1 Exec VP & CFO Common 2018-03-22 4 M 0 120000.0000 6.1250 A 665507.0000 D Common 2018-03-22 4 M 0 6667.0000 8.4000 A 672174.0000 D Common 2018-03-22 4 S 0 6667.0000 26.0472 D 665507.0000 D Common 2018-03-22 4 S 0 120000.0000 26.0051 D 545507.0000 D Stock Option (right to buy) 8.4000 2018-03-22 4 M 0 6667.0000 0.0000 D 2013-03-05 2019-03-05 Common 6667.0000 0.0000 D Stock Option (right to buy) 6.1250 2018-03-22 4 M 0 120000.0000 0.0000 D 2013-10-01 2019-10-01 Common 120000.0000 43266.0000 D This transaction was made pursuant to the Reporting Person's existing Rule 10b5-1 plan (i.e., a stock trading plan designed to comply with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended). This disposition transaction was executed in multiple trades at prices ranging from $25.93 to $26.16. 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 holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. This disposition transaction was executed in multiple trades at prices ranging from $25.74 to $26.16. 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 holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. On March 5, 2012, the Reporting Person was awarded an employee stock option (the "March 2012 Option") to acquire 6,667 shares (the "March 2012 Shares") of the Issuer's common stock. Pursuant to the terms of the March 2012 Option, 25% of the March 2012 Shares became exercisable on March 5, 2013, and the remaining 75% of the March 2012 Shares became exercisable in equal, quarterly installments thereafter until March 5, 2016, at which time all remaining March 2012 Shares became fully exercisable. On October 1, 2012, the Reporting Person was awarded an employee stock option (the "October 2012 Option") to acquire 163,266 shares (the "October 2012 Shares") of the Issuer's common stock, including the underlying securities reported in Table II of this Form 4. Pursuant to the terms of the October 2012 Option, 25% of the October 2012 Shares became exercisable on October 1, 2013, and the remaining 75% of the October 2012 Shares became exercisable in equal, annual installments thereafter until October 1, 2016, at which time all remaining October 2012 Shares became fully exercisable. Mark N. Rogers, Attorney-in-Fact 2018-03-26