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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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"A portion of these shares is subject to vesting."}],"balance_after":14674,"source":{"system":"sec-edgar","filing":"0001321732-18-000116","document":"wf-form4_153559073129769.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1375889/000132173218000116/wf-form4_153559073129769.xml","form_type":"4"}},{"id":4043963,"issuer":{"id":3430,"kind":"organization","name":"Penumbra Inc","symbol":"PEN"},"owners":[{"id":53575,"kind":"person","name":"Grewal Harpreet","position":1,"cik":"0001375889","reported_name":"Grewal Harpreet","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-02-22T00:34:47.000Z","date":"2018-02-16","kind":"grant","acquired":true,"shares":1215,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Restricted stock units vest as to 1/4 on each of March 31, 2018, June 30, 2018, September 30, 2018 and December 31, 2018, subject to Mr. Grewal's continued service as a director through such dates."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"A portion of these shares is subject to vesting."}],"balance_after":15802,"source":{"system":"sec-edgar","filing":"0001321732-18-000027","document":"wf-form4_151925967323807.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1375889/000132173218000027/wf-form4_151925967323807.xml","form_type":"4"}},{"id":4188932,"issuer":{"id":3430,"kind":"organization","name":"Penumbra Inc","symbol":"PEN"},"owners":[{"id":53575,"kind":"person","name":"Grewal Harpreet","position":1,"cik":"0001375889","reported_name":"Grewal Harpreet","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-10-10T20:39:07.000Z","date":"2017-10-05","kind":"sale","acquired":false,"shares":500,"price":92.9,"value":46450.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales were effected pursuant to the Reporting Person's Rule 10b5-1 trading plan."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"A portion of these shares is subject to vesting."}],"balance_after":14587,"source":{"system":"sec-edgar","filing":"0001321732-17-000161","document":"wf-form4_150766793344666.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1375889/000132173217000161/wf-form4_150766793344666.xml","form_type":"4"}},{"id":4226420,"issuer":{"id":3430,"kind":"organization","name":"Penumbra Inc","symbol":"PEN"},"owners":[{"id":53575,"kind":"person","name":"Grewal Harpreet","position":1,"cik":"0001375889","reported_name":"Grewal Harpreet","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-08-23T20:06:04.000Z","date":"2017-08-21","kind":"sale","acquired":false,"shares":4500,"price":82.65,"value":371925.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales were effected pursuant to the Reporting Person's Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $82.30 to $83.10. 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"A portion of these shares is subject to vesting."}],"balance_after":15087,"source":{"system":"sec-edgar","filing":"0001321732-17-000147","document":"wf-form4_150351874882069.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1375889/000132173217000147/wf-form4_150351874882069.xml","form_type":"4"}},{"id":4349554,"issuer":{"id":3430,"kind":"organization","name":"Penumbra Inc","symbol":"PEN"},"owners":[{"id":53575,"kind":"person","name":"Grewal Harpreet","position":1,"cik":"0001375889","reported_name":"Grewal Harpreet","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-04-19T23:35:00.000Z","date":"2017-04-17","kind":"grant","acquired":true,"shares":1448,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Restricted stock units vest as to 1/4 on each of April 17, 2017, June 30, 2017, September 30, 2017 and December 31, 2017, subject to Mr. Grewal's continued service as a director through such dates."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"A portion of these shares is subject to vesting."}],"balance_after":19587,"source":{"system":"sec-edgar","filing":"0001321732-17-000097","document":"wf-form4_149264488600563.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1375889/000132173217000097/wf-form4_149264488600563.xml","form_type":"4"}}]}