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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."}],"balance_after":489025,"source":{"system":"sec-edgar","filing":"0001225208-20-013593","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1097864/000122520820013593/doc4.xml","form_type":"4"}},{"id":3008589,"issuer":{"id":3161,"kind":"organization","name":"ON SEMICONDUCTOR CORP","symbol":"ON"},"owners":[{"id":145299,"kind":"person","name":"Schromm William A.","position":1,"cik":"0001363806","reported_name":"Schromm William A.","relationship":{"officer":true,"officer_title":"EVP & Chief Operating Officer"}}],"security":"Common","published_at":"2020-10-13T22:11:22.000Z","date":"2020-10-09","kind":"sale","acquired":false,"shares":95285,"price":25.8867,"value":2466614.2095,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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)."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This disposition transaction was executed in multiple trades at prices ranging from $25.52 to $26.41.  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."}],"balance_after":593487,"source":{"system":"sec-edgar","filing":"0001225208-20-012451","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1097864/000122520820012451/doc4.xml","form_type":"4"}},{"id":3218658,"issuer":{"id":3161,"kind":"organization","name":"ON SEMICONDUCTOR CORP","symbol":"ON"},"owners":[{"id":145299,"kind":"person","name":"Schromm William A.","position":1,"cik":"0001363806","reported_name":"Schromm William A.","relationship":{"officer":true,"officer_title":"EVP & Chief Operating Officer"}}],"security":"Common","published_at":"2020-03-10T22:55:47.000Z","date":"2020-03-06","kind":"tax_withholding","acquired":false,"shares":25259,"price":17.28,"value":436475.52,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"This disposition transaction represents shares withheld by the Issuer in connection with the vesting on March 6, 2020 of the Reporting Person's 2017 Performance Based Restricted Stock Units award granted pursuant to the Issuer's Amended and Restated Stock Incentive Plan and related award agreement.  These shares were withheld to satisfy the Reporting Person's tax withholding obligations.  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These shares were withheld to satisfy the Reporting Person's tax withholding obligations.  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On March 5, 2020, certain of these units vested.  These shares were withheld to satisfy the Reporting Person's tax withholding obligations.  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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."}],"balance_after":716413,"source":{"system":"sec-edgar","filing":"0001225208-19-014261","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1097864/000122520819014261/doc4.xml","form_type":"4"}},{"id":3385573,"issuer":{"id":3161,"kind":"organization","name":"ON SEMICONDUCTOR CORP","symbol":"ON"},"owners":[{"id":145299,"kind":"person","name":"Schromm William A.","position":1,"cik":"0001363806","reported_name":"Schromm William A.","relationship":{"officer":true,"officer_title":"EVP & Chief Operating Officer"}}],"security":"Common","published_at":"2019-10-30T22:15:16.000Z","date":"2019-10-28","kind":"sale","acquired":false,"shares":20000,"price":20.5,"value":410000.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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)."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This disposition transaction was executed in multiple trades at prices ranging from $20.00 to $21.00.  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."}],"balance_after":726413,"source":{"system":"sec-edgar","filing":"0001225208-19-013950","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1097864/000122520819013950/doc4.xml","form_type":"4"}},{"id":3444931,"issuer":{"id":3161,"kind":"organization","name":"ON SEMICONDUCTOR CORP","symbol":"ON"},"owners":[{"id":145299,"kind":"person","name":"Schromm William A.","position":1,"cik":"0001363806","reported_name":"Schromm William A.","relationship":{"officer":true,"officer_title":"EVP & Chief Operating Officer"}}],"security":"Common","published_at":"2019-08-07T22:28:16.000Z","date":"2019-08-05","kind":"tax_withholding","acquired":false,"shares":14993,"price":17.85,"value":267625.05,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"This disposition transaction reflects shares withheld by the Issuer in connection with the PBRSU Award to satisfy the Reporting Person's tax withholding obligations.  The Issuer will pay these taxes on behalf of the Reporting Person."}],"balance_after":746413,"source":{"system":"sec-edgar","filing":"0001225208-19-011013","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1097864/000122520819011013/doc4.xml","form_type":"4"}},{"id":3444930,"issuer":{"id":3161,"kind":"organization","name":"ON SEMICONDUCTOR CORP","symbol":"ON"},"owners":[{"id":145299,"kind":"person","name":"Schromm William A.","position":1,"cik":"0001363806","reported_name":"Schromm William A.","relationship":{"officer":true,"officer_title":"EVP & Chief Operating Officer"}}],"security":"Common","published_at":"2019-08-07T22:28:16.000Z","date":"2019-08-05","kind":"grant","acquired":true,"shares":67458,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This Form 4 reports the acquisition on August 5, 2019 of 67,458 Performance-Based Restricted Stock Units (the \"PBRSUs\") from the attainment of performance goals under an award made to the Reporting Person on March 5, 2018 (the \"PBRSU Award\").  The PBRSU Award covered a performance period of six consecutive fiscal quarters beginning with the quarter commencing January 1, 2018 (the \"Performance Period\"), and the number of shares eligible for vesting was based upon the Issuer achieving certain Adjusted Non-GAAP EBITDA performance goals for the Performance Period.  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The award may only be settled in shares of the Issuer's common stock upon vesting and was for no consideration other than service as an executive officer of the Issuer."}],"balance_after":762210,"source":{"system":"sec-edgar","filing":"0001225208-19-004802","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1097864/000122520819004802/doc4.xml","form_type":"4"}},{"id":3829980,"issuer":{"id":1179,"kind":"organization","name":"COHERENT CORP.","symbol":"COHR"},"owners":[{"id":145299,"kind":"person","name":"Schromm William A.","position":1,"cik":"0001363806","reported_name":"Schromm William A.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Option (Right to Buy)","published_at":"2018-08-30T12:36:27.000Z","date":"2018-08-28","kind":"grant","acquired":true,"shares":4020,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"These options will vest in four equal annual installments beginning on August 28, 2019."}],"balance_after":4020,"derivative":{"exercise_price":49.9,"expiration_date":"2028-08-28","underlying":"Common Stock","underlying_shares":4020},"source":{"system":"sec-edgar","filing":"0000820318-18-000001","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/820318/000082031818000001/primary_doc.xml","form_type":"4"}},{"id":3829979,"issuer":{"id":1179,"kind":"organization","name":"COHERENT CORP.","symbol":"COHR"},"owners":[{"id":145299,"kind":"person","name":"Schromm William A.","position":1,"cik":"0001363806","reported_name":"Schromm William A.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-08-30T12:36:27.000Z","date":"2018-08-28","kind":"grant","acquired":true,"shares":1608,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares represent a restricted stock award granted to the reporting person pursuant to the II-VI Incorporated Amended and Restated 2012 Omnibus Incentive Plan.  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The PBRSU Award covered a performance period of six consecutive fiscal quarters beginning with the quarter commencing January 1, 2017 (the \"Performance Period\"), and the number of shares eligible for vesting was based upon the Issuer achieving certain Adjusted Non-GAAP EBITDA performance goals for the Performance Period.  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On March 7, 2018, certain of these units vested.  These shares are withheld to satisfy the Reporting Person's tax withholding obligations.  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On March 6, 2018, certain of these units vested.  These shares are withheld to satisfy the Reporting Person's tax withholding obligations.  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The award may only be settled in shares of the Issuer's common stock upon vesting and was for no consideration other than service as an executive officer of the Issuer."}],"balance_after":649154,"source":{"system":"sec-edgar","filing":"0001225208-18-005696","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1097864/000122520818005696/doc4.xml","form_type":"4"}},{"id":4012101,"issuer":{"id":3161,"kind":"organization","name":"ON SEMICONDUCTOR CORP","symbol":"ON"},"owners":[{"id":145299,"kind":"person","name":"Schromm William A.","position":1,"cik":"0001363806","reported_name":"Schromm William A.","relationship":{"officer":true,"officer_title":"EVP & Chief Operating Officer"}}],"security":"Common","published_at":"2018-03-06T23:27:59.000Z","date":"2018-03-02","kind":"tax_withholding","acquired":false,"shares":4174,"price":24.43,"value":101970.82,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"This disposition transaction represents shares withheld by the Issuer in connection with the Reporting Person's 2015 restricted stock units award granted pursuant to the Issuer's Amended and Restated Stock Incentive Plan and related award agreement.  On March 2, 2018, certain of these units vested.  These shares were withheld to satisfy the Reporting Person's tax withholding obligations.  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On March 2, 2018, certain of these units vested.  These shares were withheld to satisfy the Reporting Person's tax withholding obligations.  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Pursuant to the terms of the Option, 25% of the Shares became exercisable on March 5, 2013 and the remaining 75% of the Shares became exercisable in equal, quarterly installments thereafter until March 5, 2016, at which time all remaining Shares under the Option became fully exercisable."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"On March 5, 2012, the Reporting Person was awarded an employee stock option (the \"Option\") to acquire 54,366 shares (the \"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 Option, 25% of the Shares became exercisable on March 5, 2013 and the remaining 75% of the Shares became exercisable in equal, quarterly installments thereafter until March 5, 2016, at which time all remaining Shares under the Option became fully exercisable."}],"balance_after":0,"derivative":{"exercise_price":8.4,"exercise_date":"2013-03-05","expiration_date":"2019-03-05","underlying":"Common","underlying_shares":54366},"source":{"system":"sec-edgar","filing":"0001225208-17-017469","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1097864/000122520817017469/doc4.xml","form_type":"4"}},{"id":4158793,"issuer":{"id":3161,"kind":"organization","name":"ON SEMICONDUCTOR CORP","symbol":"ON"},"owners":[{"id":145299,"kind":"person","name":"Schromm William A.","position":1,"cik":"0001363806","reported_name":"Schromm William A.","relationship":{"officer":true,"officer_title":"EVP & Chief Operating Officer"}}],"security":"Common","published_at":"2017-11-17T22:13:31.000Z","date":"2017-11-15","kind":"sale","acquired":false,"shares":54366,"price":21.1799,"value":1151466.4434,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This disposition transaction was executed in multiple trades at prices ranging from $21.15 to $21.2301.  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."}],"balance_after":612449,"source":{"system":"sec-edgar","filing":"0001225208-17-017469","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1097864/000122520817017469/doc4.xml","form_type":"4"}},{"id":4158792,"issuer":{"id":3161,"kind":"organization","name":"ON SEMICONDUCTOR CORP","symbol":"ON"},"owners":[{"id":145299,"kind":"person","name":"Schromm William A.","position":1,"cik":"0001363806","reported_name":"Schromm William A.","relationship":{"officer":true,"officer_title":"EVP & Chief Operating Officer"}}],"security":"Common","published_at":"2017-11-17T22:13:31.000Z","date":"2017-11-15","kind":"exercise","acquired":true,"shares":54366,"price":8.4,"value":456674.4,"ownership":{"direct":true},"balance_after":666815,"source":{"system":"sec-edgar","filing":"0001225208-17-017469","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1097864/000122520817017469/doc4.xml","form_type":"4"}},{"id":4216646,"issuer":{"id":3161,"kind":"organization","name":"ON SEMICONDUCTOR CORP","symbol":"ON"},"owners":[{"id":145299,"kind":"person","name":"Schromm William A.","position":1,"cik":"0001363806","reported_name":"Schromm William A.","relationship":{"officer":true,"officer_title":"EVP & Chief Operating Officer"}}],"security":"Common","published_at":"2017-09-06T22:50:53.000Z","date":"2017-09-01","kind":"tax_withholding","acquired":false,"shares":4806,"price":17.25,"value":82903.5,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This disposition transaction represents shares withheld by the Issuer in connection with the vesting of certain units under the September 2, 2014 restricted stock units award to the Reporting Person under the Issuer's Amended and Restated Stock Incentive Plan.  The reported shares were withheld to satisfy the Reporting Person's tax withholding obligations. 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The award will vest in three equal annual installments beginning on August 18, 2018."}],"balance_after":10461,"source":{"system":"sec-edgar","filing":"0001363806-17-000001","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/820318/000136380617000001/primary_doc.xml","form_type":"4"}},{"id":4239251,"issuer":{"id":3161,"kind":"organization","name":"ON SEMICONDUCTOR CORP","symbol":"ON"},"owners":[{"id":145299,"kind":"person","name":"Schromm William A.","position":1,"cik":"0001363806","reported_name":"Schromm William A.","relationship":{"officer":true,"officer_title":"EVP & Chief Operating Officer"}}],"security":"Common","published_at":"2017-08-10T00:58:44.000Z","date":"2017-08-07","kind":"tax_withholding","acquired":false,"shares":44387,"price":16.33,"value":724839.71,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"This disposition transaction reflects shares withheld by the Issuer in connection with the 2016 PBRSU Award.  On August 7, 2017, certain of the PBRSUs under the 2016 PBRSU Award vested.  Certain of the shares underlying such PBRSUs were withheld to satisfy the Reporting Person's withholding obligations.  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The 2016 PBRSU Award covered a performance period of six consecutive fiscal quarters beginning with the quarter commencing January 1, 2016 (the \"Performance Measurement Period\"), and the number of shares eligible for vesting was based upon the Issuer achieving certain Adjusted Non-GAAP EBITDA, market share growth, and revenue growth performance goals.  As a result of the Issuer's achievement of the Adjusted Non-GAAP EBITDA performance goals for the Performance Measurement Period, the acquired PBRSUs will vest in two equal tranches, with the first tranche having vested on August 7, 2017."}],"balance_after":661642,"source":{"system":"sec-edgar","filing":"0001225208-17-013569","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1097864/000122520817013569/doc4.xml","form_type":"4"}},{"id":4393154,"issuer":{"id":3161,"kind":"organization","name":"ON SEMICONDUCTOR CORP","symbol":"ON"},"owners":[{"id":145299,"kind":"person","name":"Schromm William A.","position":1,"cik":"0001363806","reported_name":"Schromm William A.","relationship":{"officer":true,"officer_title":"EVP & Chief Operating Officer"}}],"security":"Common","published_at":"2017-03-09T22:45:08.000Z","date":"2017-03-07","kind":"tax_withholding","acquired":false,"shares":14796,"price":15.29,"value":226230.84,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This disposition transaction represents shares withheld by the Issuer in connection with the March 7, 2016 restricted stock units award to the Reporting Person under the Issuer's Amended and Restated Stock Incentive Plan.  On March 7, 2017, certain of these units vested.  These shares were withheld to satisfy the Reporting Person's tax withholding obligations.  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On March 3, 2017, certain of these units vested.  These shares were withheld to satisfy the Reporting Person's tax withholding obligations.  The Issuer will pay these taxes on behalf of the Reporting Person."}],"balance_after":428780,"source":{"system":"sec-edgar","filing":"0001225208-17-005654","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1097864/000122520817005654/doc4.xml","form_type":"4"}},{"id":4401084,"issuer":{"id":3161,"kind":"organization","name":"ON SEMICONDUCTOR CORP","symbol":"ON"},"owners":[{"id":145299,"kind":"person","name":"Schromm William A.","position":1,"cik":"0001363806","reported_name":"Schromm William A.","relationship":{"officer":true,"officer_title":"EVP & Chief Operating Officer"}}],"security":"Common","published_at":"2017-03-06T22:57:22.000Z","date":"2017-03-03","kind":"tax_withholding","acquired":false,"shares":4628,"price":15.21,"value":70391.88,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"This disposition transaction represents shares withheld by the Issuer in connection with the March 3, 2014 restricted stock units award to the Reporting Person under the Issuer's Amended and Restated Stock Incentive Plan.  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On March 2, 2017, certain of these units vested.  These shares were withheld to satisfy the Reporting Person's tax withholding obligations.  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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."}],"balance_after":486397,"source":{"system":"sec-edgar","filing":"0001225208-16-043159","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1097864/000122520816043159/doc4.xml","form_type":"4"}},{"id":4522513,"issuer":{"id":3161,"kind":"organization","name":"ON SEMICONDUCTOR CORP","symbol":"ON"},"owners":[{"id":145299,"kind":"person","name":"Schromm William A.","position":1,"cik":"0001363806","reported_name":"Schromm William A.","relationship":{"officer":true,"officer_title":"EVP & Chief Operating Officer"}}],"security":"Common","published_at":"2016-12-14T19:55:34.000Z","date":"2016-12-12","kind":"exercise","acquired":true,"shares":60000,"price":9.208,"value":552480.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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)."}],"balance_after":546397,"source":{"system":"sec-edgar","filing":"0001225208-16-043159","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1097864/000122520816043159/doc4.xml","form_type":"4"}},{"id":4609816,"issuer":{"id":3161,"kind":"organization","name":"ON SEMICONDUCTOR CORP","symbol":"ON"},"owners":[{"id":145299,"kind":"person","name":"Schromm William A.","position":1,"cik":"0001363806","reported_name":"Schromm William A.","relationship":{"officer":true,"officer_title":"EVP & Chief Operating Officer"}}],"security":"Common","published_at":"2016-09-07T20:20:08.000Z","date":"2016-09-02","kind":"tax_withholding","acquired":false,"shares":4539,"price":11.03,"value":50065.17,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This disposition transaction represents shares withheld by the Issuer in connection with the September 2, 2014 restricted stock units award to the Reporting Person under the Issuer's Amended and Restated Stock Incentive Plan.  On September 2, 2016, certain of these units vested.  These shares were withheld to satisfy the Reporting Person's tax withholding obligations.  The Issuer will pay these taxes on behalf of the Reporting Person."}],"balance_after":486397,"source":{"system":"sec-edgar","filing":"0001225208-16-038951","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1097864/000122520816038951/doc4.xml","form_type":"4"}}]}