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These RSUs fully vested on October 23, 2020."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"On October 23, 2019, the reporting person was granted 3,411 RSUs.  These RSUs fully vested on October 23, 2020."}],"balance_after":0,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":3411},"source":{"system":"sec-edgar","filing":"0001209191-20-055691","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1114995/000120919120055691/doc4.xml","form_type":"4"}},{"id":3000887,"issuer":{"id":3883,"kind":"organization","name":"IMPINJ INC","symbol":"PI"},"owners":[{"id":12071,"kind":"person","name":"ALBERG TOM A","position":1,"cik":"0001184752","reported_name":"ALBERG TOM A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common 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Mr. Alberg shares voting and dispositive control over such shares but disclaims beneficial ownership over such shares."}],"balance_after":19219,"source":{"system":"sec-edgar","filing":"0001246360-19-002396","document":"form.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1114995/000124636019002396/form.xml","form_type":"4"}},{"id":3376584,"issuer":{"id":3883,"kind":"organization","name":"IMPINJ INC","symbol":"PI"},"owners":[{"id":12071,"kind":"person","name":"ALBERG TOM A","position":1,"cik":"0001184752","reported_name":"ALBERG TOM A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2019-11-08T21:35:11.000Z","date":"2019-11-06","kind":"sale","acquired":false,"shares":6000,"price":33.89,"value":203340.0,"ownership":{"direct":false,"nature":"By Raven Trust Fund"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported by Mr. Alberg were effected pursuant to a Rule 10b5-1 trading plan."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares held of record by Raven Trust Fund. 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These shares were sold in multiple transactions at prices ranging from $38.74 to $39.25, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein."}],"balance_after":78796,"source":{"system":"sec-edgar","filing":"0001246360-19-001857","document":"form.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1114995/000124636019001857/form.xml","form_type":"4"}},{"id":3451073,"issuer":{"id":3883,"kind":"organization","name":"IMPINJ INC","symbol":"PI"},"owners":[{"id":12071,"kind":"person","name":"ALBERG TOM A","position":1,"cik":"0001184752","reported_name":"ALBERG TOM A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2019-08-01T22:07:23.000Z","date":"2019-07-31","kind":"sale","acquired":false,"shares":20823,"price":37.7666,"value":786413.9118,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sales reported by Mr. Alberg were effected pursuant to a Rule 10b5-1 trading plan."},{"field":"shares","element":"transactionShares","label":"F4","text":"The \"Amount\" and \"Price\" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $37.38 to $38.005, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein."}],"balance_after":81496,"source":{"system":"sec-edgar","filing":"0001246360-19-001857","document":"form.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1114995/000124636019001857/form.xml","form_type":"4"}},{"id":3451072,"issuer":{"id":3883,"kind":"organization","name":"IMPINJ INC","symbol":"PI"},"owners":[{"id":12071,"kind":"person","name":"ALBERG TOM A","position":1,"cik":"0001184752","reported_name":"ALBERG TOM A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2019-08-01T22:07:23.000Z","date":"2019-07-31","kind":"sale","acquired":false,"shares":12191,"price":36.8414,"value":449133.5074,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sales reported by Mr. Alberg were effected pursuant to a Rule 10b5-1 trading plan."},{"field":"shares","element":"transactionShares","label":"F3","text":"The \"Amount\" and \"Price\" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $36.3550 to $37.33, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein."}],"balance_after":102319,"source":{"system":"sec-edgar","filing":"0001246360-19-001857","document":"form.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1114995/000124636019001857/form.xml","form_type":"4"}},{"id":3536647,"issuer":{"id":3883,"kind":"organization","name":"IMPINJ INC","symbol":"PI"},"owners":[{"id":12071,"kind":"person","name":"ALBERG TOM A","position":1,"cik":"0001184752","reported_name":"ALBERG TOM A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2019-05-07T22:21:11.000Z","date":"2019-05-03","kind":"other","acquired":true,"shares":1718,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Pro rata distribution of Common Stock held by ARCH Venture Fund V, L.P. and ARCH V Entrepreneurs Fund, L.P. to its partners for no consideration."}],"balance_after":114510,"source":{"system":"sec-edgar","filing":"0001246360-19-001376","document":"form.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1114995/000124636019001376/form.xml","form_type":"4"}},{"id":3544567,"issuer":{"id":3883,"kind":"organization","name":"IMPINJ INC","symbol":"PI"},"owners":[{"id":12071,"kind":"person","name":"ALBERG TOM A","position":1,"cik":"0001184752","reported_name":"ALBERG TOM A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2019-05-01T21:49:11.000Z","date":"2017-11-15","kind":"other","acquired":false,"shares":4817,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Alberg Family Investments LLC"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Alberg Family Investments LLC holds shares of record in the Issuer. Mr. Alberg shared voting and dispositive control over such shares but disclaimed beneficial ownership over such shares.  On November 15, 2017, Mr. Alberg sold his interests in Alberg Family Investments LLC on a pro rata basis to certain family members of Mr. Alberg, none of whom reside in Mr. Alberg's household. As a result, Mr. Alberg ceased to have reportable beneficial ownership of the shares of the Issuer held by Alberg Family Investments LLC that were included in Mr. Alberg's prior ownership reports."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Alberg Family Investments LLC holds shares of record in the Issuer. Mr. Alberg shared voting and dispositive control over such shares but disclaimed beneficial ownership over such shares.  On November 15, 2017, Mr. Alberg sold his interests in Alberg Family Investments LLC on a pro rata basis to certain family members of Mr. Alberg, none of whom reside in Mr. Alberg's household. As a result, Mr. Alberg ceased to have reportable beneficial ownership of the shares of the Issuer held by Alberg Family Investments LLC that were included in Mr. Alberg's prior ownership reports."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001246360-19-001285","document":"form.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1114995/000124636019001285/form.xml","form_type":"4"}},{"id":122808,"issuer":{"id":1956,"kind":"organization","name":"AMAZON COM INC","symbol":"AMZN"},"owners":[{"id":12071,"kind":"person","name":"ALBERG TOM A","position":1,"cik":"0001184752","reported_name":"ALBERG TOM A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit Award","published_at":"2018-11-19T22:12:35.000Z","date":"2018-11-15","kind":"exercise","acquired":false,"shares":359,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Converts into common stock on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Subject to the reporting person's continued service as a director of the issuer, this award will vest and convert into shares of common stock of the issuer at the rate of 359 shares on each of November 15, 2017, November 15, 2018, and November 15, 2019."}],"balance_after":359,"derivative":{"exercise_price":0,"exercise_date":"2017-11-15","expiration_date":"2019-11-15","underlying":"Common Stock, par value $.01 per share","underlying_shares":359},"source":{"system":"sec-edgar","filing":"0001018724-18-000183","document":"wf-form4_154266553931984.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1018724/000101872418000183/wf-form4_154266553931984.xml","form_type":"4"}},{"id":122807,"issuer":{"id":1956,"kind":"organization","name":"AMAZON COM INC","symbol":"AMZN"},"owners":[{"id":12071,"kind":"person","name":"ALBERG TOM A","position":1,"cik":"0001184752","reported_name":"ALBERG TOM A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, par value $.01 per share","published_at":"2018-11-19T22:12:35.000Z","date":"2018-11-15","kind":"exercise","acquired":true,"shares":359,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":12198,"source":{"system":"sec-edgar","filing":"0001018724-18-000183","document":"wf-form4_154266553931984.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1018724/000101872418000183/wf-form4_154266553931984.xml","form_type":"4"}},{"id":3843660,"issuer":{"id":3883,"kind":"organization","name":"IMPINJ INC","symbol":"PI"},"owners":[{"id":12071,"kind":"person","name":"ALBERG TOM A","position":1,"cik":"0001184752","reported_name":"ALBERG TOM A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"RESTRICTED STOCK UNITS - 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By virtue of their relationship as affiliated entities who have overlapping general partners and managing directors, Madrona Managing Director Fund, LLC, Madrona Venture Fund I-A, L.P., Madrona Venture Fund I-B, L.P., Madrona Investment Partners, LLC and Mr. Alberg may be deemed to share voting and investment control of the record shares."}],"balance_after":129902,"source":{"system":"sec-edgar","filing":"0001209191-17-014104","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1114995/000120919117014104/doc4.xml","form_type":"4"}},{"id":4428088,"issuer":{"id":3883,"kind":"organization","name":"IMPINJ INC","symbol":"PI"},"owners":[{"id":12071,"kind":"person","name":"ALBERG TOM A","position":1,"cik":"0001184752","reported_name":"ALBERG TOM A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-02-24T02:32:01.000Z","date":"2017-02-22","kind":"other","acquired":false,"shares":969886,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Pro rata distribution from Madrona Venture Fund I-A, LP, of which the reporting person is a managing member."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"129,902 of these shares are held by Madrona Managing Director Fund, LLC and 105,649 of these shares are held of record by Madrona Venture Fund I-B, L.P."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Madrona Investment Partners, LLC, as the sole general partner of Madrona Venture Fund I-A, L.P. and Madrona Venture Fund I-B, L.P., may be deemed to beneficially own certain of the shares held of record by Madrona Venture Fund I-A, L.P. and Madrona Venture Fund I-B, L.P. but disclaims beneficial ownership of such shares in which it does not have an actual pecuniary interest. Tom A. Alberg, a member of the board of directors, disclaims beneficial ownership of all shares held of record by Madrona Managing Director Fund, LLC, Madrona Venture Fund I-A, L.P. and Madrona Venture Fund I-B, L.P., in which he does not have an actual pecuniary interest. By virtue of their relationship as affiliated entities who have overlapping general partners and managing directors, Madrona Managing Director Fund, LLC, Madrona Venture Fund I-A, L.P., Madrona Venture Fund I-B, L.P., Madrona Investment Partners, LLC and Mr. Alberg may be deemed to share voting and investment control of the record shares."}],"balance_after":235551,"source":{"system":"sec-edgar","filing":"0001209191-17-014104","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1114995/000120919117014104/doc4.xml","form_type":"4"}},{"id":142976,"issuer":{"id":1956,"kind":"organization","name":"AMAZON COM INC","symbol":"AMZN"},"owners":[{"id":12071,"kind":"person","name":"ALBERG TOM A","position":1,"cik":"0001184752","reported_name":"ALBERG TOM A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, par value $.01 per 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