{"entity":{"type":"insider","cik":"0001341405","url":"/insider/0001341405","json_url":"/insider/0001341405.json","name":"Swan Winifred L","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":113,"n_filings":98,"first":"2010-03-03","last":"2018-02-22","span_basis":"filed_date"},"name_variants":[{"name":"Swan Winifred L","source":"filing","n_filings":98,"first_seen":"2010-03-03","last_seen":"2018-02-22"}],"transactions":[{"id":6562838,"accession":"0001246360-18-000793","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-18-000793","line_url":"/filing/0001246360-18-000793#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3500.0,"shares_display":"3,500","price_per_share":24.48,"price_display":"24.48","price_state":"stated","total_value":85680.0,"total_display":"85,680.00","total_whole":"85,680","shares_owned_after":9770.0,"shares_owned_after_display":"9,770","ownership_form":"D","is_10b5_1":null,"transaction_date":"2018-02-20","filed_date":"2018-02-22","scope":"insider"},{"id":6837387,"accession":"0001246360-18-000228","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-18-000228","line_url":"/filing/0001246360-18-000228#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3500.0,"shares_display":"3,500","price_per_share":24.88,"price_display":"24.88","price_state":"stated","total_value":87080.0,"total_display":"87,080.00","total_whole":"87,080","shares_owned_after":10270.0,"shares_owned_after_display":"10,270","ownership_form":"D","is_10b5_1":null,"transaction_date":"2018-01-16","filed_date":"2018-01-19","scope":"insider"},{"id":4796698,"accession":"0001246360-17-003339","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-17-003339","line_url":"/filing/0001246360-17-003339#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3500.0,"shares_display":"3,500","price_per_share":25.35,"price_display":"25.35","price_state":"stated","total_value":88725.0,"total_display":"88,725.00","total_whole":"88,725","shares_owned_after":10770.0,"shares_owned_after_display":"10,770","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-12-20","filed_date":"2017-12-21","scope":"insider"},{"id":4847045,"accession":"0001246360-17-003090","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-17-003090","line_url":"/filing/0001246360-17-003090#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3500.0,"shares_display":"3,500","price_per_share":25.73,"price_display":"25.73","price_state":"stated","total_value":90055.0,"total_display":"90,055.00","total_whole":"90,055","shares_owned_after":11270.0,"shares_owned_after_display":"11,270","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-11-15","filed_date":"2017-11-15","scope":"insider"},{"id":4502830,"accession":"0001246360-17-002925","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-17-002925","line_url":"/filing/0001246360-17-002925#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3500.0,"shares_display":"3,500","price_per_share":27.5,"price_display":"27.50","price_state":"stated","total_value":96250.0,"total_display":"96,250.00","total_whole":"96,250","shares_owned_after":11770.0,"shares_owned_after_display":"11,770","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-10-20","filed_date":"2017-10-23","scope":"insider"},{"id":4174363,"accession":"0001246360-17-002803","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-17-002803","line_url":"/filing/0001246360-17-002803#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3500.0,"shares_display":"3,500","price_per_share":27.27,"price_display":"27.27","price_state":"stated","total_value":95445.0,"total_display":"95,445.00","total_whole":"95,445","shares_owned_after":12270.0,"shares_owned_after_display":"12,270","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-09-20","filed_date":"2017-09-21","scope":"insider"},{"id":4846973,"accession":"0001246360-17-002578","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-17-002578","line_url":"/filing/0001246360-17-002578#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3500.0,"shares_display":"3,500","price_per_share":29.21,"price_display":"29.21","price_state":"stated","total_value":102235.0,"total_display":"102,235.00","total_whole":"102,235","shares_owned_after":12770.0,"shares_owned_after_display":"12,770","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-08-15","filed_date":"2017-08-15","scope":"insider"},{"id":4128223,"accession":"0001246360-17-002419","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-17-002419","line_url":"/filing/0001246360-17-002419#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3500.0,"shares_display":"3,500","price_per_share":24.16,"price_display":"24.16","price_state":"stated","total_value":84560.0,"total_display":"84,560.00","total_whole":"84,560","shares_owned_after":13270.0,"shares_owned_after_display":"13,270","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-07-20","filed_date":"2017-07-21","scope":"insider"},{"id":5262911,"accession":"0001246360-17-002210","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-17-002210","line_url":"/filing/0001246360-17-002210#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3500.0,"shares_display":"3,500","price_per_share":23.14,"price_display":"23.14","price_state":"stated","total_value":80990.0,"total_display":"80,990.00","total_whole":"80,990","shares_owned_after":13770.0,"shares_owned_after_display":"13,770","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-06-15","filed_date":"2017-06-16","scope":"insider"},{"id":4846909,"accession":"0001246360-17-001871","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-17-001871","line_url":"/filing/0001246360-17-001871#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3500.0,"shares_display":"3,500","price_per_share":21.94,"price_display":"21.94","price_state":"stated","total_value":76790.0,"total_display":"76,790.00","total_whole":"76,790","shares_owned_after":14270.0,"shares_owned_after_display":"14,270","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-05-15","filed_date":"2017-05-15","scope":"insider"},{"id":4846828,"accession":"0001246360-17-001632","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-17-001632","line_url":"/filing/0001246360-17-001632#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3500.0,"shares_display":"3,500","price_per_share":27.28,"price_display":"27.28","price_state":"stated","total_value":95480.0,"total_display":"95,480.00","total_whole":"95,480","shares_owned_after":14770.0,"shares_owned_after_display":"14,770","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-04-20","filed_date":"2017-04-20","scope":"insider"},{"id":4635657,"accession":"0001246360-17-001436","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-17-001436","line_url":"/filing/0001246360-17-001436#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":15723.0,"shares_display":"15,723","price_per_share":27.66,"price_display":"27.66","price_state":"stated","total_value":434898.18,"total_display":"434,898.18","total_whole":"434,898","shares_owned_after":15270.0,"shares_owned_after_display":"15,270","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-03-20","filed_date":"2017-03-22","scope":"insider"},{"id":4373963,"accession":"0001246360-17-000754","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-17-000754","line_url":"/filing/0001246360-17-000754#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":16049.0,"shares_display":"16,049","price_per_share":28.01,"price_display":"28.01","price_state":"stated","total_value":449532.49,"total_display":"449,532.49","total_whole":"449,532","shares_owned_after":10473.0,"shares_owned_after_display":"10,473","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-02-15","filed_date":"2017-02-15","scope":"insider"},{"id":4373938,"accession":"0001246360-17-000247","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-17-000247","line_url":"/filing/0001246360-17-000247#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3500.0,"shares_display":"3,500","price_per_share":26.19,"price_display":"26.19","price_state":"stated","total_value":91665.0,"total_display":"91,665.00","total_whole":"91,665","shares_owned_after":10973.0,"shares_owned_after_display":"10,973","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-01-20","filed_date":"2017-01-23","scope":"insider"},{"id":2184891,"accession":"0001246360-16-007498","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-16-007498","line_url":"/filing/0001246360-16-007498#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3500.0,"shares_display":"3,500","price_per_share":25.91,"price_display":"25.91","price_state":"stated","total_value":90685.0,"total_display":"90,685.00","total_whole":"90,685","shares_owned_after":11473.0,"shares_owned_after_display":"11,473","ownership_form":"D","is_10b5_1":null,"transaction_date":"2016-12-15","filed_date":"2016-12-16","scope":"insider"},{"id":2149496,"accession":"0001246360-16-007220","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-16-007220","line_url":"/filing/0001246360-16-007220#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3000.0,"shares_display":"3,000","price_per_share":25.51,"price_display":"25.51","price_state":"stated","total_value":76530.0,"total_display":"76,530.00","total_whole":"76,530","shares_owned_after":11973.0,"shares_owned_after_display":"11,973","ownership_form":"D","is_10b5_1":null,"transaction_date":"2016-11-22","filed_date":"2016-11-22","scope":"insider"},{"id":3094687,"accession":"0001246360-16-005547","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001246360-16-005547","line_url":"/filing/0001246360-16-005547#line-4","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2500.0,"shares_display":"2,500","price_per_share":14.95,"price_display":"14.95","price_state":"stated","total_value":37375.0,"total_display":"37,375.00","total_whole":"37,375","shares_owned_after":11973.0,"shares_owned_after_display":"11,973","ownership_form":"D","is_10b5_1":null,"transaction_date":"2016-04-14","filed_date":"2016-04-15","scope":"insider"},{"id":3094683,"accession":"0001246360-16-005547","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-16-005547","line_url":"/filing/0001246360-16-005547#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1880.0,"shares_display":"1,880","price_per_share":15.69,"price_display":"15.69","price_state":"stated","total_value":29497.2,"total_display":"29,497.20","total_whole":"29,497","shares_owned_after":13854.0,"shares_owned_after_display":"13,854","ownership_form":"D","is_10b5_1":null,"transaction_date":"2016-03-14","filed_date":"2016-04-15","scope":"insider"},{"id":3053004,"accession":"0001246360-16-005129","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-16-005129","line_url":"/filing/0001246360-16-005129#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":620.0,"shares_display":"620","price_per_share":15.69,"price_display":"15.69","price_state":"stated","total_value":9727.8,"total_display":"9,727.80","total_whole":"9,728","shares_owned_after":17614.0,"shares_owned_after_display":"17,614","ownership_form":"D","is_10b5_1":null,"transaction_date":"2016-03-14","filed_date":"2016-03-15","scope":"insider"},{"id":3263121,"accession":"0001246360-16-004603","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-16-004603","line_url":"/filing/0001246360-16-004603#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2500.0,"shares_display":"2,500","price_per_share":14.07,"price_display":"14.07","price_state":"stated","total_value":35175.0,"total_display":"35,175.00","total_whole":"35,175","shares_owned_after":12439.0,"shares_owned_after_display":"12,439","ownership_form":"D","is_10b5_1":null,"transaction_date":"2016-02-16","filed_date":"2016-02-18","scope":"insider"},{"id":3094679,"accession":"0001246360-16-005547","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001246360-16-005547","line_url":"/filing/0001246360-16-005547#line-1","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1880.0,"shares_display":"1,880","price_per_share":19.04,"price_display":"19.04","price_state":"stated","total_value":35795.2,"total_display":"35,795.20","total_whole":"35,795","shares_owned_after":15734.0,"shares_owned_after_display":"15,734","ownership_form":"D","is_10b5_1":null,"transaction_date":"2016-01-14","filed_date":"2016-04-15","scope":"insider"},{"id":2335628,"accession":"0001246360-16-004139","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-16-004139","line_url":"/filing/0001246360-16-004139#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":620.0,"shares_display":"620","price_per_share":19.04,"price_display":"19.04","price_state":"stated","total_value":11804.8,"total_display":"11,804.80","total_whole":"11,805","shares_owned_after":14319.0,"shares_owned_after_display":"14,319","ownership_form":"D","is_10b5_1":null,"transaction_date":"2016-01-14","filed_date":"2016-01-15","scope":"insider"},{"id":8612621,"accession":"0001246360-15-003853","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-15-003853","line_url":"/filing/0001246360-15-003853#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2500.0,"shares_display":"2,500","price_per_share":18.9,"price_display":"18.90","price_state":"stated","total_value":47250.0,"total_display":"47,250.00","total_whole":"47,250","shares_owned_after":14319.0,"shares_owned_after_display":"14,319","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-12-14","filed_date":"2015-12-15","scope":"insider"},{"id":8218104,"accession":"0001246360-15-003573","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-15-003573","line_url":"/filing/0001246360-15-003573#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2500.0,"shares_display":"2,500","price_per_share":19.65,"price_display":"19.65","price_state":"stated","total_value":49125.0,"total_display":"49,125.00","total_whole":"49,125","shares_owned_after":16199.0,"shares_owned_after_display":"16,199","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-11-16","filed_date":"2015-11-17","scope":"insider"},{"id":8889640,"accession":"0001246360-15-003341","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-15-003341","line_url":"/filing/0001246360-15-003341#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2500.0,"shares_display":"2,500","price_per_share":15.46,"price_display":"15.46","price_state":"stated","total_value":38650.0,"total_display":"38,650.00","total_whole":"38,650","shares_owned_after":18079.0,"shares_owned_after_display":"18,079","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-10-14","filed_date":"2015-10-14","scope":"insider"},{"id":8776299,"accession":"0001246360-15-003098","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-15-003098","line_url":"/filing/0001246360-15-003098#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2500.0,"shares_display":"2,500","price_per_share":16.01,"price_display":"16.01","price_state":"stated","total_value":40025.0,"total_display":"40,025.00","total_whole":"40,025","shares_owned_after":19959.0,"shares_owned_after_display":"19,959","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-09-14","filed_date":"2015-09-15","scope":"insider"},{"id":8378581,"accession":"0001246360-15-002937","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-15-002937","line_url":"/filing/0001246360-15-002937#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2500.0,"shares_display":"2,500","price_per_share":18.14,"price_display":"18.14","price_state":"stated","total_value":45350.0,"total_display":"45,350.00","total_whole":"45,350","shares_owned_after":21839.0,"shares_owned_after_display":"21,839","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-08-14","filed_date":"2015-08-17","scope":"insider"},{"id":8468274,"accession":"0001246360-15-002690","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-15-002690","line_url":"/filing/0001246360-15-002690#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2500.0,"shares_display":"2,500","price_per_share":14.71,"price_display":"14.71","price_state":"stated","total_value":36775.0,"total_display":"36,775.00","total_whole":"36,775","shares_owned_after":23719.0,"shares_owned_after_display":"23,719","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-07-14","filed_date":"2015-07-15","scope":"insider"},{"id":8585348,"accession":"0001246360-15-002520","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-15-002520","line_url":"/filing/0001246360-15-002520#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2500.0,"shares_display":"2,500","price_per_share":15.48,"price_display":"15.48","price_state":"stated","total_value":38700.0,"total_display":"38,700.00","total_whole":"38,700","shares_owned_after":25599.0,"shares_owned_after_display":"25,599","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-06-15","filed_date":"2015-06-16","scope":"insider"},{"id":8758480,"accession":"0001246360-15-002263","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-15-002263","line_url":"/filing/0001246360-15-002263#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2500.0,"shares_display":"2,500","price_per_share":16.65,"price_display":"16.65","price_state":"stated","total_value":41625.0,"total_display":"41,625.00","total_whole":"41,625","shares_owned_after":27479.0,"shares_owned_after_display":"27,479","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-05-18","filed_date":"2015-05-19","scope":"insider"},{"id":8651685,"accession":"0001246360-15-002200","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001246360-15-002200","line_url":"/filing/0001246360-15-002200#line-1","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":500.0,"shares_display":"500","price_per_share":16.33,"price_display":"16.33","price_state":"stated","total_value":8165.0,"total_display":"8,165.00","total_whole":"8,165","shares_owned_after":29359.0,"shares_owned_after_display":"29,359","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-05-14","filed_date":"2015-05-15","scope":"insider"},{"id":8612345,"accession":"0001246360-15-001814","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001246360-15-001814","line_url":"/filing/0001246360-15-001814#line-1","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":500.0,"shares_display":"500","price_per_share":18.41,"price_display":"18.41","price_state":"stated","total_value":9205.0,"total_display":"9,205.00","total_whole":"9,205","shares_owned_after":29859.0,"shares_owned_after_display":"29,859","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-04-15","filed_date":"2015-04-17","scope":"insider"},{"id":8849729,"accession":"0001246360-15-001576","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001246360-15-001576","line_url":"/filing/0001246360-15-001576#line-1","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":500.0,"shares_display":"500","price_per_share":17.31,"price_display":"17.31","price_state":"stated","total_value":8655.0,"total_display":"8,655.00","total_whole":"8,655","shares_owned_after":30359.0,"shares_owned_after_display":"30,359","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-03-19","filed_date":"2015-03-20","scope":"insider"},{"id":8585248,"accession":"0001246360-15-001056","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001246360-15-001056","line_url":"/filing/0001246360-15-001056#line-1","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":500.0,"shares_display":"500","price_per_share":17.6,"price_display":"17.60","price_state":"stated","total_value":8800.0,"total_display":"8,800.00","total_whole":"8,800","shares_owned_after":17688.0,"shares_owned_after_display":"17,688","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-02-18","filed_date":"2015-02-20","scope":"insider"},{"id":8803964,"accession":"0001246360-15-000261","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001246360-15-000261","line_url":"/filing/0001246360-15-000261#line-3","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":500.0,"shares_display":"500","price_per_share":18.44,"price_display":"18.44","price_state":"stated","total_value":9220.0,"total_display":"9,220.00","total_whole":"9,220","shares_owned_after":18188.0,"shares_owned_after_display":"18,188","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-01-14","filed_date":"2015-01-14","scope":"insider"},{"id":8803963,"accession":"0001246360-15-000261","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001246360-15-000261","line_url":"/filing/0001246360-15-000261#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":666.0,"shares_display":"666","price_per_share":18.35,"price_display":"18.35","price_state":"stated","total_value":12221.1,"total_display":"12,221.10","total_whole":"12,221","shares_owned_after":18688.0,"shares_owned_after_display":"18,688","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-01-13","filed_date":"2015-01-14","scope":"insider"},{"id":6878973,"accession":"0001209191-14-078614","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-14-078614","line_url":"/filing/0001209191-14-078614#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":667.0,"shares_display":"667","price_per_share":18.17,"price_display":"18.17","price_state":"stated","total_value":12119.39,"total_display":"12,119.39","total_whole":"12,119","shares_owned_after":18688.0,"shares_owned_after_display":"18,688","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-12-29","filed_date":"2014-12-31","scope":"insider"},{"id":6915814,"accession":"0001209191-14-077861","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-14-077861","line_url":"/filing/0001209191-14-077861#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":667.0,"shares_display":"667","price_per_share":18.61,"price_display":"18.61","price_state":"stated","total_value":12412.87,"total_display":"12,412.87","total_whole":"12,413","shares_owned_after":18688.0,"shares_owned_after_display":"18,688","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-12-22","filed_date":"2014-12-23","scope":"insider"},{"id":6449571,"accession":"0001209191-14-077179","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001209191-14-077179","line_url":"/filing/0001209191-14-077179#line-1","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":500.0,"shares_display":"500","price_per_share":18.25,"price_display":"18.25","price_state":"stated","total_value":9125.0,"total_display":"9,125.00","total_whole":"9,125","shares_owned_after":18688.0,"shares_owned_after_display":"18,688","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-12-18","filed_date":"2014-12-19","scope":"insider"},{"id":6849180,"accession":"0001209191-14-072492","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-14-072492","line_url":"/filing/0001209191-14-072492#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":16667.0,"shares_display":"16,667","price_per_share":17.04,"price_display":"17.04","price_state":"stated","total_value":284005.68,"total_display":"284,005.68","total_whole":"284,006","shares_owned_after":19188.0,"shares_owned_after_display":"19,188","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-12-01","filed_date":"2014-12-02","scope":"insider"},{"id":6532150,"accession":"0001209191-14-069288","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-14-069288","line_url":"/filing/0001209191-14-069288#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":17167.0,"shares_display":"17,167","price_per_share":17.37,"price_display":"17.37","price_state":"stated","total_value":298190.79,"total_display":"298,190.79","total_whole":"298,191","shares_owned_after":19188.0,"shares_owned_after_display":"19,188","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-11-14","filed_date":"2014-11-17","scope":"insider"},{"id":6561056,"accession":"0001209191-14-068160","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-14-068160","line_url":"/filing/0001209191-14-068160#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":16666.0,"shares_display":"16,666","price_per_share":16.25,"price_display":"16.25","price_state":"stated","total_value":270822.5,"total_display":"270,822.50","total_whole":"270,823","shares_owned_after":19688.0,"shares_owned_after_display":"19,688","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-11-07","filed_date":"2014-11-12","scope":"insider"},{"id":6476910,"accession":"0001209191-14-067356","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-14-067356","line_url":"/filing/0001209191-14-067356#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":12000.0,"shares_display":"12,000","price_per_share":15.3,"price_display":"15.30","price_state":"stated","total_value":183600.0,"total_display":"183,600.00","total_whole":"183,600","shares_owned_after":19688.0,"shares_owned_after_display":"19,688","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-11-05","filed_date":"2014-11-07","scope":"insider"},{"id":6807445,"accession":"0001209191-14-063832","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-14-063832","line_url":"/filing/0001209191-14-063832#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3468.0,"shares_display":"3,468","price_per_share":13.01,"price_display":"13.01","price_state":"stated","total_value":45118.68,"total_display":"45,118.68","total_whole":"45,119","shares_owned_after":19688.0,"shares_owned_after_display":"19,688","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-10-15","filed_date":"2014-10-17","scope":"insider"},{"id":7054682,"accession":"0001209191-14-053095","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001209191-14-053095","line_url":"/filing/0001209191-14-053095#line-3","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2000.0,"shares_display":"2,000","price_per_share":13.6,"price_display":"13.60","price_state":"stated","total_value":27200.0,"total_display":"27,200.00","total_whole":"27,200","shares_owned_after":20188.0,"shares_owned_after_display":"20,188","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-08-15","filed_date":"2014-08-18","scope":"insider"},{"id":7054678,"accession":"0001209191-14-053095","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001209191-14-053095","line_url":"/filing/0001209191-14-053095#line-1","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":500.0,"shares_display":"500","price_per_share":13.61,"price_display":"13.61","price_state":"stated","total_value":6805.0,"total_display":"6,805.00","total_whole":"6,805","shares_owned_after":20188.0,"shares_owned_after_display":"20,188","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-08-14","filed_date":"2014-08-18","scope":"insider"},{"id":7000848,"accession":"0001209191-14-048435","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-14-048435","line_url":"/filing/0001209191-14-048435#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2000.0,"shares_display":"2,000","price_per_share":13.46,"price_display":"13.46","price_state":"stated","total_value":26920.0,"total_display":"26,920.00","total_whole":"26,920","shares_owned_after":20688.0,"shares_owned_after_display":"20,688","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-07-18","filed_date":"2014-07-22","scope":"insider"},{"id":6204115,"accession":"0001209191-14-048212","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001209191-14-048212","line_url":"/filing/0001209191-14-048212#line-1","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":500.0,"shares_display":"500","price_per_share":13.5,"price_display":"13.50","price_state":"stated","total_value":6750.0,"total_display":"6,750.00","total_whole":"6,750","shares_owned_after":20688.0,"shares_owned_after_display":"20,688","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-07-17","filed_date":"2014-07-21","scope":"insider"},{"id":6414425,"accession":"0001209191-14-040627","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001209191-14-040627","line_url":"/filing/0001209191-14-040627#line-4","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":9228.0,"shares_display":"9,228","price_per_share":14.0,"price_display":"14.00","price_state":"stated","total_value":129192.0,"total_display":"129,192.00","total_whole":"129,192","shares_owned_after":21188.0,"shares_owned_after_display":"21,188","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-06-09","filed_date":"2014-06-11","scope":"insider"},{"id":6414367,"accession":"0001209191-14-039930","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-14-039930","line_url":"/filing/0001209191-14-039930#line-2","is_derivative":false,"issuer_cik":"0001333170","issuer_name":"NxStage Medical, Inc.","issuer_ticker":"NXTM","issuer_name_source":null,"issuer_url":"/issuer/0001333170","owner_cik":"0001341405","owner_name":"Swan Winifred L","owner_display_name":"Swan Winifred L","owner_url":"/insider/0001341405","role":"Officer (SVP and General Counsel)","role_mark":"O","role_mark_label":"Officer (SVP and General Counsel)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP and General Counsel","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":7500.0,"shares_display":"7,500","price_per_share":14.0,"price_display":"14.00","price_state":"stated","total_value":105000.0,"total_display":"105,000.00","total_whole":"105,000","shares_owned_after":21688.0,"shares_owned_after_display":"21,688","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-06-05","filed_date":"2014-06-09","scope":"insider"}],"collapsed":true,"next_cursor":"2014-06-05|6414367","ledger_fault":false,"count":{"value":113,"kind":"exact"},"open_market_only":false,"composition":{"kind":"exact","rows":[{"code":"P","label":"Open-market purchase","n":0,"open_market":true},{"code":"S","label":"Open-market sale","n":113,"open_market":true},{"code":"M","label":"Option exercise","n":0,"open_market":false},{"code":"A","label":"Grant or award","n":0,"open_market":false},{"code":"F","label":"Tax withholding","n":0,"open_market":false},{"code":"D","label":"Disposition to the issuer","n":0,"open_market":false},{"code":"X","label":"In-the-money option exercise","n":0,"open_market":false}],"total":113},"affiliations":[{"type":"issuer","type_label":"ISSUER","cik":"0001333170","name":"NxStage Medical, Inc.","url":"/issuer/0001333170","role":"Officer (SVP and General Counsel)","n_filings":98,"first_seen":"2010-03-03","last_seen":"2018-02-22"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0001341405","retrieved_at":"2026-08-25T07:27:12+00:00","coverage":{"filings":1506293,"transactions":4290787,"issuers":28597,"insiders":152303,"first_filed_date":"2003-06-30","last_filed_date":"2026-08-24","last_ingest":"2026-08-25T05:24:19.374141+00:00","counts_are":{"filings":"estimate","transactions":"estimate","issuers":"estimate","insiders":"estimate"},"source":"SEC EDGAR Form 4 filings, parsed by ebomi","fault":false},"license":{"underlying_records":"US SEC filings are public records of the United States government and are not subject to copyright. The transactional facts in them are not ours to license.","this_presentation":"The parsing, normalisation, curation, and presentation are ebomi's own work.","grant":"undecided","grant_note":"The open licence for ebomi's own layer is an open owner decision (SPEC-20260731T1159Z open question 3: CC BY 4.0 or CC0 with a citation request). Until it is taken, no grant is asserted here.","citation_request":"Balogh, A. Insider trading. Scientific Data 10, 237 (2023)","url":"https://ebomi.com/license"},"fair_use":{"policy":"These JSON endpoints are open and unauthenticated. Please read them at a human pace, identify your client in the User-Agent header, and use the published dataset for bulk work rather than crawling page by page.","bulk_alternative":"doi:10.1038/s41597-023-02147-6"}}