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The reporting person hereby undertakes to provide upon request to the SEC staff or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":2214016,"source":{"system":"sec-edgar","filing":"0001209191-17-030342","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36270/000120919117030342/doc4.xml","form_type":"4"}},{"id":4332821,"issuer":{"id":3122,"kind":"organization","name":"M&T BANK CORP","symbol":"MTB"},"owners":[{"id":171581,"kind":"person","name":"WILMERS ROBERT G","position":1,"cik":"0001164543","reported_name":"WILMERS ROBERT G","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman of the Board and CEO"}}],"security":"Common Stock","published_at":"2017-05-05T20:27:07.000Z","date":"2017-05-04","kind":"disposition_to_issuer","acquired":false,"shares":192143,"price":159.1339,"value":30576464.9477,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $159.0000 to $159.9750. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":2221873,"source":{"system":"sec-edgar","filing":"0001209191-17-030342","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36270/000120919117030342/doc4.xml","form_type":"4"}},{"id":4472814,"issuer":{"id":3122,"kind":"organization","name":"M&T BANK CORP","symbol":"MTB"},"owners":[{"id":171581,"kind":"person","name":"WILMERS ROBERT G","position":1,"cik":"0001164543","reported_name":"WILMERS ROBERT G","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman of the Board and CEO"}}],"security":"Common Stock","published_at":"2017-02-02T22:18:58.000Z","date":"2017-01-31","kind":"grant","acquired":true,"shares":5008,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares issued pursuant to vesting of performance-based restricted stock units that were granted to the reporting person on January 31, 2014, upon achievement of performance goals under the 2009 M&T Bank Corporation Equity Incentive Compensation Plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The performance-based restricted stock units were granted under an equity incentive compensation plan maintained by M&T Bank Corporation, and therefore the reporting person paid no price for the performance-based restricted stock units."},{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F1","text":"Shares issued pursuant to vesting of performance-based restricted stock units that were granted to the reporting person on January 31, 2014, upon achievement of performance goals under the 2009 M&T Bank Corporation Equity Incentive Compensation Plan."}],"balance_after":2414016,"source":{"system":"sec-edgar","filing":"0001209191-17-007201","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36270/000120919117007201/doc4.xml","form_type":"4"}},{"id":4476693,"issuer":{"id":3122,"kind":"organization","name":"M&T BANK CORP","symbol":"MTB"},"owners":[{"id":171581,"kind":"person","name":"WILMERS ROBERT G","position":1,"cik":"0001164543","reported_name":"WILMERS ROBERT G","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman of the Board and CEO"}}],"security":"Common Stock","published_at":"2017-01-31T23:25:38.000Z","date":"2016-12-28","kind":"gift","acquired":true,"shares":15813,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F8","text":"The reported transaction involves a transfer of securities by gift for which no consideration was paid."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"The indicated shares are held by the Interlaken Foundation, a Delaware not-for-profit, non-stock corporation in which the reporting person has no pecuniary interest.  The reporting person is a director and President of the Interlaken Foundation and holds voting and dispositive power over the shares held by it."}],"balance_after":409062,"source":{"system":"sec-edgar","filing":"0001209191-17-006477","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/36270/000120919117006477/doc4.xml","form_type":"4"}},{"id":4476692,"issuer":{"id":3122,"kind":"organization","name":"M&T BANK CORP","symbol":"MTB"},"owners":[{"id":171581,"kind":"person","name":"WILMERS ROBERT G","position":1,"cik":"0001164543","reported_name":"WILMERS ROBERT G","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman of the Board and CEO"}}],"security":"Common Stock","published_at":"2017-01-31T23:25:38.000Z","date":"2016-12-28","kind":"gift","acquired":true,"shares":15813,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F8","text":"The reported transaction involves a transfer of securities by gift for which no consideration was paid."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"The indicated shares are held by Roche Foundation, Inc., a Delaware not-for-profit, non-stock corporation in which the reporting person has no pecuniary interest.  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