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By virtue of his position as an officer of NVP Associates, the managing member of the general partner of NVP XII, Casper de Clercq may be deemed to share voting and dispositive power with respect to such securities. Mr. de Clercq disclaims beneficial ownership of all such securities, except to the extent of any pecuniary interest therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-17-032087","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1388658/000120919117032087/doc4.xml","form_type":"4"}},{"id":4322294,"issuer":{"id":1499,"kind":"organization","name":"iRhythm Holdings, Inc.","symbol":"IRTC"},"owners":[{"id":176201,"kind":"person","name":"de Clercq Casper L.","position":1,"cik":"0001614601","reported_name":"de Clercq Casper L.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-05-12T21:41:26.000Z","date":"2017-05-12","kind":"other","acquired":false,"shares":284747,"ownership":{"direct":false,"nature":"By Limited Partnership"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares were disposed via pro rata in-kind distribution of Issuer's common stock from Norwest Venture Partners XI, LP (\"NVP XI\") to its limited and general partners."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares were disposed via pro rata in-kind distribution of Issuer's common stock from Norwest Venture Partners XI, LP (\"NVP XI\") to its limited and general partners."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The securities shown on Line 1 of Table I represent securities held of record by NVP XI. By virtue of his position as an officer of NVP Associates, LLC (\"NVP Associates\"), the managing member of the general partner of NVP XI, Casper de Clercq may be deemed to share voting and dispositive power with respect to such securities. Mr. de Clercq disclaims beneficial ownership of all such securities, except to the extent of any pecuniary interest therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-17-032087","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1388658/000120919117032087/doc4.xml","form_type":"4"}},{"id":4326351,"issuer":{"id":1499,"kind":"organization","name":"iRhythm Holdings, Inc.","symbol":"IRTC"},"owners":[{"id":176201,"kind":"person","name":"de Clercq Casper L.","position":1,"cik":"0001614601","reported_name":"de Clercq Casper L.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-05-10T21:45:33.000Z","date":"2017-05-08","kind":"other","acquired":false,"shares":900000,"ownership":{"direct":false,"nature":"By Limited Partnership"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Shares were disposed via pro rata in-kind distribution of Issuer's common stock from Norwest Venture Partners XII, LP (\"NVP XII\") to its limited and general partners."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Shares were disposed via pro rata in-kind distribution of Issuer's common stock from Norwest Venture Partners XII, LP (\"NVP XII\") to its limited and general partners."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The securities shown on Line 2 of Table I represent securities held of record by NVP XII. By virtue of his position as an officer of NVP Associates, the managing member of the general partner of NVP XII, Casper de Clercq may be deemed to share voting and dispositive power with respect to such securities. Mr. de Clercq disclaims beneficial ownership of all such securities, except to the extent of any pecuniary interest therein."}],"balance_after":284747,"source":{"system":"sec-edgar","filing":"0001209191-17-031385","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1388658/000120919117031385/doc4.xml","form_type":"4"}},{"id":4326350,"issuer":{"id":1499,"kind":"organization","name":"iRhythm Holdings, Inc.","symbol":"IRTC"},"owners":[{"id":176201,"kind":"person","name":"de Clercq Casper L.","position":1,"cik":"0001614601","reported_name":"de Clercq Casper L.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-05-10T21:45:33.000Z","date":"2017-05-08","kind":"other","acquired":false,"shares":900000,"ownership":{"direct":false,"nature":"By Limited Partnership"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares were disposed via pro rata in-kind distribution of Issuer's common stock from Norwest Venture Partners XI, LP (\"NVP XI\") to its limited and general partners."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares were disposed via pro rata in-kind distribution of Issuer's common stock from Norwest Venture Partners XI, LP (\"NVP XI\") to its limited and general partners."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The securities shown on Line 1 of Table I represent securities held of record by NVP XI. By virtue of his position as an officer of NVP Associates, LLC (\"NVP Associates\"), the managing member of the general partner of NVP XI, Casper de Clercq may be deemed to share voting and dispositive power with respect to such securities. Mr. de Clercq disclaims beneficial ownership of all such securities, except to the extent of any pecuniary interest therein."}],"balance_after":284747,"source":{"system":"sec-edgar","filing":"0001209191-17-031385","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1388658/000120919117031385/doc4.xml","form_type":"4"}},{"id":4574650,"issuer":{"id":1499,"kind":"organization","name":"iRhythm Holdings, Inc.","symbol":"IRTC"},"owners":[{"id":176201,"kind":"person","name":"de Clercq Casper L.","position":1,"cik":"0001614601","reported_name":"de Clercq Casper L.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series E Convertible Preferred Stock","published_at":"2016-10-25T23:55:51.000Z","date":"2016-10-25","kind":"exercise","acquired":false,"shares":397883,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Limited Partnership"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"The Series E Convertible Preferred Stock automatically converted into common stock on a one for one basis immediately prior to the completion of the Issuer's initial public offering of common stock and has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The Series E Convertible Preferred Stock automatically converted into common stock on a one for one basis immediately prior to the completion of the Issuer's initial public offering of common stock and has no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"The Series E Convertible Preferred Stock automatically converted into common stock on a one for one basis immediately prior to the completion of the Issuer's initial public offering of common stock and has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The securities shown on Line 2 of Table I and Lines 3 and 4 of Table II represent securities held of record by Norwest Venture Partners XII, LP (\"NVP XII\"). By virtue of his position as an officer of NVP Associates, LLC (\"NVP Associates\"), the managing member of the general partner of NVP XII, Casper de Clercq may be deemed to share voting and dispositive power with respect to such securities. Mr. de Clercq disclaims beneficial ownership of all such securities, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":397883},"source":{"system":"sec-edgar","filing":"0001209191-16-146912","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1388658/000120919116146912/doc4.xml","form_type":"4"}},{"id":4574649,"issuer":{"id":1499,"kind":"organization","name":"iRhythm Holdings, Inc.","symbol":"IRTC"},"owners":[{"id":176201,"kind":"person","name":"de Clercq Casper L.","position":1,"cik":"0001614601","reported_name":"de Clercq Casper L.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series D Convertible Preferred Stock","published_at":"2016-10-25T23:55:51.000Z","date":"2016-10-25","kind":"exercise","acquired":false,"shares":786864,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Limited Partnership"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"The Series D Convertible Preferred Stock automatically converted into common stock on a one for one basis immediately prior to the completion of the Issuer's initial public offering of common stock and has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The Series D Convertible Preferred Stock automatically converted into common stock on a one for one basis immediately prior to the completion of the Issuer's initial public offering of common stock and has no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The Series D Convertible Preferred Stock automatically converted into common stock on a one for one basis immediately prior to the completion of the Issuer's initial public offering of common stock and has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The securities shown on Line 2 of Table I and Lines 3 and 4 of Table II represent securities held of record by Norwest Venture Partners XII, LP (\"NVP XII\"). By virtue of his position as an officer of NVP Associates, LLC (\"NVP Associates\"), the managing member of the general partner of NVP XII, Casper de Clercq may be deemed to share voting and dispositive power with respect to such securities. Mr. de Clercq disclaims beneficial ownership of all such securities, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":786864},"source":{"system":"sec-edgar","filing":"0001209191-16-146912","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1388658/000120919116146912/doc4.xml","form_type":"4"}},{"id":4574648,"issuer":{"id":1499,"kind":"organization","name":"iRhythm Holdings, Inc.","symbol":"IRTC"},"owners":[{"id":176201,"kind":"person","name":"de Clercq Casper L.","position":1,"cik":"0001614601","reported_name":"de Clercq Casper L.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series E Convertible Preferred Stock","published_at":"2016-10-25T23:55:51.000Z","date":"2016-10-25","kind":"exercise","acquired":false,"shares":397883,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Limited Partnership"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The Series E Convertible Preferred Stock automatically converted into common stock on a one for one basis immediately prior to the completion of the Issuer's initial public offering of common stock and has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The Series E Convertible Preferred Stock automatically converted into common stock on a one for one basis immediately prior to the completion of the Issuer's initial public offering of common stock and has no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The Series E Convertible Preferred Stock automatically converted into common stock on a one for one basis immediately prior to the completion of the Issuer's initial public offering of common stock and has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The securities shown on Line 1 of Table I and Lines 1 and 2 of Table II represent securities held of record by Norwest Venture Partners XI, LP (\"NVP XI\"). By virtue of his position as an officer of NVP Associates, LLC (\"NVP Associates\"), the managing member of the general partner of NVP XI, Casper de Clercq may be deemed to share voting and dispositive power with respect to such securities. Mr. de Clercq disclaims beneficial ownership of all such securities, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":397883},"source":{"system":"sec-edgar","filing":"0001209191-16-146912","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1388658/000120919116146912/doc4.xml","form_type":"4"}},{"id":4574647,"issuer":{"id":1499,"kind":"organization","name":"iRhythm Holdings, Inc.","symbol":"IRTC"},"owners":[{"id":176201,"kind":"person","name":"de Clercq Casper L.","position":1,"cik":"0001614601","reported_name":"de Clercq Casper L.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series D Convertible Preferred Stock","published_at":"2016-10-25T23:55:51.000Z","date":"2016-10-25","kind":"exercise","acquired":false,"shares":786864,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Limited Partnership"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The Series D Convertible Preferred Stock automatically converted into common stock on a one for one basis immediately prior to the completion of the Issuer's initial public offering of common stock and has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The Series D Convertible Preferred Stock automatically converted into common stock on a one for one basis immediately prior to the completion of the Issuer's initial public offering of common stock and has no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The Series D Convertible Preferred Stock automatically converted into common stock on a one for one basis immediately prior to the completion of the Issuer's initial public offering of common stock and has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The securities shown on Line 1 of Table I and Lines 1 and 2 of Table II represent securities held of record by Norwest Venture Partners XI, LP (\"NVP XI\"). By virtue of his position as an officer of NVP Associates, LLC (\"NVP Associates\"), the managing member of the general partner of NVP XI, Casper de Clercq may be deemed to share voting and dispositive power with respect to such securities. Mr. de Clercq disclaims beneficial ownership of all such securities, except to the extent of any pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":786864},"source":{"system":"sec-edgar","filing":"0001209191-16-146912","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1388658/000120919116146912/doc4.xml","form_type":"4"}},{"id":4574646,"issuer":{"id":1499,"kind":"organization","name":"iRhythm Holdings, Inc.","symbol":"IRTC"},"owners":[{"id":176201,"kind":"person","name":"de Clercq Casper L.","position":1,"cik":"0001614601","reported_name":"de Clercq Casper L.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2016-10-25T23:55:51.000Z","date":"2016-10-25","kind":"exercise","acquired":true,"shares":1184747,"ownership":{"direct":false,"nature":"By Limited Partnership"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The Series D Convertible Preferred Stock automatically converted into common stock on a one for one basis immediately prior to the completion of the Issuer's initial public offering of common stock and has no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The Series E Convertible Preferred Stock automatically converted into common stock on a one for one basis immediately prior to the completion of the Issuer's initial public offering of common stock and has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The securities shown on Line 2 of Table I and Lines 3 and 4 of Table II represent securities held of record by Norwest Venture Partners XII, LP (\"NVP XII\"). By virtue of his position as an officer of NVP Associates, LLC (\"NVP Associates\"), the managing member of the general partner of NVP XII, Casper de Clercq may be deemed to share voting and dispositive power with respect to such securities. Mr. de Clercq disclaims beneficial ownership of all such securities, except to the extent of any pecuniary interest therein."}],"balance_after":1184747,"source":{"system":"sec-edgar","filing":"0001209191-16-146912","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1388658/000120919116146912/doc4.xml","form_type":"4"}},{"id":4574645,"issuer":{"id":1499,"kind":"organization","name":"iRhythm Holdings, Inc.","symbol":"IRTC"},"owners":[{"id":176201,"kind":"person","name":"de Clercq Casper L.","position":1,"cik":"0001614601","reported_name":"de Clercq Casper L.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2016-10-25T23:55:51.000Z","date":"2016-10-25","kind":"exercise","acquired":true,"shares":1184747,"ownership":{"direct":false,"nature":"By Limited Partnership"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Series D Convertible Preferred Stock automatically converted into common stock on a one for one basis immediately prior to the completion of the Issuer's initial public offering of common stock and has no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The Series E Convertible Preferred Stock automatically converted into common stock on a one for one basis immediately prior to the completion of the Issuer's initial public offering of common stock and has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The securities shown on Line 1 of Table I and Lines 1 and 2 of Table II represent securities held of record by Norwest Venture Partners XI, LP (\"NVP XI\"). By virtue of his position as an officer of NVP Associates, LLC (\"NVP Associates\"), the managing member of the general partner of NVP XI, Casper de Clercq may be deemed to share voting and dispositive power with respect to such securities. Mr. de Clercq disclaims beneficial ownership of all such securities, except to the extent of any pecuniary interest therein."}],"balance_after":1184747,"source":{"system":"sec-edgar","filing":"0001209191-16-146912","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1388658/000120919116146912/doc4.xml","form_type":"4"}}]}