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The shares set forth above were sold pursuant to the 10b5-1 Plan."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"This transaction was executed in multiple trades at prices ranging from $77.41 to $78.39. The price 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 transactions were effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Shares are held by the Jorge Alberto Valdes and Suzanne Lopez-Calleja, cotrustees of the Valdes-Lopez-Calleja Family Trust, dated May 18, 2011."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Shares are held by the Valdes-Lopez-Calleja Family Trust U/A/D 05/18/2011, with respect to which the reporting person is a 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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 issurer full information regarding the number of shares and prices at which the transactions were effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Included in this number are 72,334 unvested restricted stock units, 38,000 of which were granted on March 8, 2016 and shall vest through March 8, 2019, 22,500 of which were granted on March 8, 2015 and shall vest through March 8, 2018 and 11,834 of which were granted on March 8, 2014 and shall vest through March 8, 2017."}],"balance_after":72334,"source":{"system":"sec-edgar","filing":"0001093557-17-000006","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1093557/000109355717000006/edgardoc.xml","form_type":"4"}},{"id":4493266,"issuer":{"id":3114,"kind":"organization","name":"DEXCOM INC","symbol":"DXCM"},"owners":[{"id":176863,"kind":"person","name":"VALDES JORGE A","position":1,"cik":"0001343856","reported_name":"VALDES JORGE A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CTO"}}],"security":"Common Stock","published_at":"2017-01-12T00:31:36.000Z","date":"2017-01-09","kind":"exercise","acquired":true,"shares":2583,"price":7.63,"value":19708.29,"ownership":{"direct":true},"balance_after":74917,"source":{"system":"sec-edgar","filing":"0001093557-17-000006","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1093557/000109355717000006/edgardoc.xml","form_type":"4"}},{"id":4493265,"issuer":{"id":3114,"kind":"organization","name":"DEXCOM INC","symbol":"DXCM"},"owners":[{"id":176863,"kind":"person","name":"VALDES JORGE A","position":1,"cik":"0001343856","reported_name":"VALDES JORGE A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CTO"}}],"security":"Common Stock","published_at":"2017-01-12T00:31:36.000Z","date":"2017-01-09","kind":"sale","acquired":false,"shares":900,"price":63.3118,"value":56980.62,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On November 4, 2016 Mr. Valdes adopted a 10b5-1 Plan.  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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 transactions were effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Included in this number are 72,334 unvested restricted stock units, 38,000 of which were granted on March 8, 2016 and shall vest through March 8, 2019, 22,500 of which were granted on March 8, 2015 and shall vest through March 8, 2018 and 11,834 of which were granted on March 8, 2014 and shall vest through March 8, 2017."}],"balance_after":72334,"source":{"system":"sec-edgar","filing":"0001093557-17-000006","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1093557/000109355717000006/edgardoc.xml","form_type":"4"}},{"id":4493262,"issuer":{"id":3114,"kind":"organization","name":"DEXCOM INC","symbol":"DXCM"},"owners":[{"id":176863,"kind":"person","name":"VALDES JORGE A","position":1,"cik":"0001343856","reported_name":"VALDES JORGE A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CTO"}}],"security":"Common Stock","published_at":"2017-01-12T00:31:36.000Z","date":"2017-01-09","kind":"exercise","acquired":true,"shares":417,"price":7.63,"value":3181.71,"ownership":{"direct":true},"balance_after":72751,"source":{"system":"sec-edgar","filing":"0001093557-17-000006","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1093557/000109355717000006/edgardoc.xml","form_type":"4"}},{"id":4493261,"issuer":{"id":3114,"kind":"organization","name":"DEXCOM INC","symbol":"DXCM"},"owners":[{"id":176863,"kind":"person","name":"VALDES JORGE A","position":1,"cik":"0001343856","reported_name":"VALDES JORGE A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CTO"}}],"security":"Common Stock","published_at":"2017-01-12T00:31:36.000Z","date":"2017-01-09","kind":"sale","acquired":false,"shares":7000,"price":63.0232,"value":441162.4,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On November 4, 2016 Mr. Valdes adopted a 10b5-1 Plan.  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This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Valdes.   The shares set forth above were sold pursuant to the 10b5-1 Plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $83.52 to $84.97. The price 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 transactions were effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Included in this number are 72,334 unvested restricted stock units, 38,000 of which were granted on March 8, 2016 and shall vest on March 8, 2019, 22,500 of which were granted on March 8, 2015 and shall vest through March 8, 2018 and 11,834 of which were granted on March 8, 2014 and shall vest through March 8, 2017."}],"balance_after":72334,"source":{"system":"sec-edgar","filing":"0001093557-16-000722","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1093557/000109355716000722/edgardoc.xml","form_type":"4"}},{"id":4580860,"issuer":{"id":3114,"kind":"organization","name":"DEXCOM INC","symbol":"DXCM"},"owners":[{"id":176863,"kind":"person","name":"VALDES JORGE A","position":1,"cik":"0001343856","reported_name":"VALDES JORGE A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CTO"}}],"security":"Common Stock","published_at":"2016-10-13T00:57:06.000Z","date":"2016-10-10","kind":"exercise","acquired":true,"shares":11000,"price":7.63,"value":83930.0,"ownership":{"direct":true},"balance_after":83334,"source":{"system":"sec-edgar","filing":"0001093557-16-000722","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1093557/000109355716000722/edgardoc.xml","form_type":"4"}},{"id":4604722,"issuer":{"id":3114,"kind":"organization","name":"DEXCOM INC","symbol":"DXCM"},"owners":[{"id":176863,"kind":"person","name":"VALDES JORGE A","position":1,"cik":"0001343856","reported_name":"VALDES JORGE A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CTO"}}],"security":"Non-Qualified Stock Option (right to buy)","published_at":"2016-09-14T00:30:52.000Z","date":"2016-09-09","kind":"exercise","acquired":false,"shares":12000,"price":93.6591,"value":1123909.2,"ownership":{"direct":true},"balance_after":13583,"derivative":{"exercise_price":7.63,"exercise_date":"2009-05-19","expiration_date":"2018-05-19","underlying":"Common Stock","underlying_shares":12000},"source":{"system":"sec-edgar","filing":"0001093557-16-000691","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1093557/000109355716000691/edgardoc.xml","form_type":"4"}},{"id":4604721,"issuer":{"id":3114,"kind":"organization","name":"DEXCOM INC","symbol":"DXCM"},"owners":[{"id":176863,"kind":"person","name":"VALDES JORGE A","position":1,"cik":"0001343856","reported_name":"VALDES JORGE A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CTO"}}],"security":"Common Stock","published_at":"2016-09-14T00:30:52.000Z","date":"2016-09-12","kind":"sale","acquired":false,"shares":7071,"price":92.0612,"value":650964.7452,"ownership":{"direct":false,"nature":"by Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F7","text":"This transaction was executed in multiple trades at prices ranging from  $92.06 to $92.07.  The price 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 transactions were effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Shares are held by the Valdes-Lopez-Calleja Family Trust U/A/D 05/18/2011, with respect to which the reporting person is a trustee."}],"balance_after":3499,"source":{"system":"sec-edgar","filing":"0001093557-16-000691","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1093557/000109355716000691/edgardoc.xml","form_type":"4"}},{"id":4604720,"issuer":{"id":3114,"kind":"organization","name":"DEXCOM INC","symbol":"DXCM"},"owners":[{"id":176863,"kind":"person","name":"VALDES JORGE A","position":1,"cik":"0001343856","reported_name":"VALDES JORGE 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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 transactions were effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Included in this number are 72,334 unvested restricted stock units, 38,000 of which were granted on March 8, 2016 and shall vest on March 8, 2019, 22,500 of which were granted on March 8, 2015 and shall vest through March 8, 2018 and 11,834 of which were granted on March 8, 2014 and shall vest through March 8, 2017."}],"balance_after":91667,"source":{"system":"sec-edgar","filing":"0001093557-16-000691","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1093557/000109355716000691/edgardoc.xml","form_type":"4"}},{"id":4604713,"issuer":{"id":3114,"kind":"organization","name":"DEXCOM INC","symbol":"DXCM"},"owners":[{"id":176863,"kind":"person","name":"VALDES JORGE A","position":1,"cik":"0001343856","reported_name":"VALDES JORGE A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CTO"}}],"security":"Common Stock","published_at":"2016-09-14T00:30:52.000Z","date":"2016-09-09","kind":"exercise","acquired":true,"shares":12000,"price":7.63,"value":91560.0,"ownership":{"direct":true},"balance_after":103667,"source":{"system":"sec-edgar","filing":"0001093557-16-000691","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1093557/000109355716000691/edgardoc.xml","form_type":"4"}}]}