X0306 4 2017-05-15 0001097864 ON SEMICONDUCTOR CORP ON 0001364183 Hall William 5005 EAST MCDOWELL ROAD PHOENIX AZ 85008 1 EVP & GM, Pwr Sol Grp Common 2017-05-15 4 S 0 41364.0000 15.3023 D 354596.0000 D This disposition transaction was executed in multiple trades at prices ranging from $15.24 to $15.35. 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. Includes an aggregate of 490 shares acquired by the Reporting Person under Issuer's Employee Stock Purchase Plan for the quarter ended March 31, 2017. Mark N. Rogers, Attorney-in-Fact 2017-05-17