{"entity":{"type":"insider","cik":"0001790695","url":"/insider/0001790695","json_url":"/insider/0001790695.json","name":"Kennedy Sheryl Lynn","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":23,"n_filings":23,"first":"2020-06-16","last":"2026-05-18","span_basis":"filed_date"},"name_variants":[{"name":"Kennedy Sheryl Lynn","source":"filing","n_filings":23,"first_seen":"2020-06-16","last_seen":"2026-05-18"}],"transactions":[{"id":6159456,"accession":"0001790695-26-000012","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001790695-26-000012","line_url":"/filing/0001790695-26-000012#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3300.0,"shares_display":"3,300","price_per_share":16.2177,"price_display":"16.22","price_state":"stated","total_value":53518.41,"total_display":"53,518.41","shares_owned_after":10245.0,"shares_owned_after_display":"10,245","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-05-14","filed_date":"2026-05-18","scope":"insider"},{"id":6046937,"accession":"0001790695-26-000007","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001790695-26-000007","line_url":"/filing/0001790695-26-000007#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3300.0,"shares_display":"3,300","price_per_share":22.9901,"price_display":"22.99","price_state":"stated","total_value":75867.33,"total_display":"75,867.33","shares_owned_after":10100.0,"shares_owned_after_display":"10,100","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-03-05","filed_date":"2026-03-05","scope":"insider"},{"id":4395768,"accession":"0001790695-25-000009","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001790695-25-000009","line_url":"/filing/0001790695-25-000009#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2400.0,"shares_display":"2,400","price_per_share":21.3419,"price_display":"21.34","price_state":"stated","total_value":51220.56,"total_display":"51,220.56","shares_owned_after":10012.0,"shares_owned_after_display":"10,012","ownership_form":"D","is_10b5_1":null,"transaction_date":"2025-11-11","filed_date":"2025-11-12","scope":"insider"},{"id":5194340,"accession":"0001415889-25-022625","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001415889-25-022625","line_url":"/filing/0001415889-25-022625#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"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":36.35,"price_display":"36.35","price_state":"stated","total_value":72700.0,"total_display":"72,700.00","shares_owned_after":10017.0,"shares_owned_after_display":"10,017","ownership_form":"D","is_10b5_1":null,"transaction_date":"2025-08-21","filed_date":"2025-08-21","scope":"insider"},{"id":5154339,"accession":"0001415889-25-012767","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001415889-25-012767","line_url":"/filing/0001415889-25-012767#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1450.0,"shares_display":"1,450","price_per_share":50.1882,"price_display":"50.19","price_state":"stated","total_value":72772.89,"total_display":"72,772.89","shares_owned_after":10049.0,"shares_owned_after_display":"10,049","ownership_form":"D","is_10b5_1":null,"transaction_date":"2025-05-13","filed_date":"2025-05-13","scope":"insider"},{"id":4318551,"accession":"0001415889-25-006110","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001415889-25-006110","line_url":"/filing/0001415889-25-006110#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1425.0,"shares_display":"1,425","price_per_share":72.9595,"price_display":"72.96","price_state":"stated","total_value":103967.2875,"total_display":"103,967.29","shares_owned_after":10147.0,"shares_owned_after_display":"10,147","ownership_form":"D","is_10b5_1":null,"transaction_date":"2025-03-03","filed_date":"2025-03-03","scope":"insider"},{"id":2449305,"accession":"0001415889-24-026495","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001415889-24-026495","line_url":"/filing/0001415889-24-026495#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1350.0,"shares_display":"1,350","price_per_share":80.5753,"price_display":"80.58","price_state":"stated","total_value":108776.655,"total_display":"108,776.66","shares_owned_after":10318.0,"shares_owned_after_display":"10,318","ownership_form":"D","is_10b5_1":null,"transaction_date":"2024-11-11","filed_date":"2024-11-12","scope":"insider"},{"id":2102052,"accession":"0001415889-24-023207","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001415889-24-023207","line_url":"/filing/0001415889-24-023207#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1550.0,"shares_display":"1,550","price_per_share":71.0573,"price_display":"71.06","price_state":"stated","total_value":110138.815,"total_display":"110,138.82","shares_owned_after":10216.0,"shares_owned_after_display":"10,216","ownership_form":"D","is_10b5_1":null,"transaction_date":"2024-09-10","filed_date":"2024-09-11","scope":"insider"},{"id":2370061,"accession":"0001415889-24-014316","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001415889-24-014316","line_url":"/filing/0001415889-24-014316#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1640.0,"shares_display":"1,640","price_per_share":57.7939,"price_display":"57.79","price_state":"stated","total_value":94781.996,"total_display":"94,782.00","shares_owned_after":10091.0,"shares_owned_after_display":"10,091","ownership_form":"D","is_10b5_1":null,"transaction_date":"2024-05-23","filed_date":"2024-05-23","scope":"insider"},{"id":8637925,"accession":"0001415889-23-015493","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001415889-23-015493","line_url":"/filing/0001415889-23-015493#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":925.0,"shares_display":"925","price_per_share":65.7736,"price_display":"65.77","price_state":"stated","total_value":60840.58,"total_display":"60,840.58","shares_owned_after":8958.0,"shares_owned_after_display":"8,958","ownership_form":"D","is_10b5_1":null,"transaction_date":"2023-11-27","filed_date":"2023-11-27","scope":"insider"},{"id":8005960,"accession":"0001415889-23-012632","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001415889-23-012632","line_url":"/filing/0001415889-23-012632#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":550.0,"shares_display":"550","price_per_share":68.8454,"price_display":"68.85","price_state":"stated","total_value":37864.97,"total_display":"37,864.97","shares_owned_after":8450.0,"shares_owned_after_display":"8,450","ownership_form":"D","is_10b5_1":null,"transaction_date":"2023-08-24","filed_date":"2023-08-25","scope":"insider"},{"id":8710555,"accession":"0001415889-23-008999","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001415889-23-008999","line_url":"/filing/0001415889-23-008999#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1100.0,"shares_display":"1,100","price_per_share":63.137,"price_display":"63.14","price_state":"stated","total_value":69450.7,"total_display":"69,450.70","shares_owned_after":7565.0,"shares_owned_after_display":"7,565","ownership_form":"D","is_10b5_1":null,"transaction_date":"2023-05-30","filed_date":"2023-06-01","scope":"insider"},{"id":8087819,"accession":"0001567619-23-004913","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-23-004913","line_url":"/filing/0001567619-23-004913#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":600.0,"shares_display":"600","price_per_share":61.6635,"price_display":"61.66","price_state":"stated","total_value":36998.1,"total_display":"36,998.10","shares_owned_after":7209.0,"shares_owned_after_display":"7,209","ownership_form":"D","is_10b5_1":null,"transaction_date":"2023-03-13","filed_date":"2023-03-13","scope":"insider"},{"id":6460112,"accession":"0001567619-22-020695","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-22-020695","line_url":"/filing/0001567619-22-020695#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":962.0,"shares_display":"962","price_per_share":57.8283,"price_display":"57.83","price_state":"stated","total_value":55630.8246,"total_display":"55,630.82","shares_owned_after":6100.0,"shares_owned_after_display":"6,100","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-11-21","filed_date":"2022-11-21","scope":"insider"},{"id":6188436,"accession":"0001567619-22-012123","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-22-012123","line_url":"/filing/0001567619-22-012123#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1350.0,"shares_display":"1,350","price_per_share":60.8842,"price_display":"60.88","price_state":"stated","total_value":82193.67,"total_display":"82,193.67","shares_owned_after":3912.0,"shares_owned_after_display":"3,912","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-06-02","filed_date":"2022-06-02","scope":"insider"},{"id":6633347,"accession":"0001567619-22-005893","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-22-005893","line_url":"/filing/0001567619-22-005893#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1100.0,"shares_display":"1,100","price_per_share":62.2701,"price_display":"62.27","price_state":"stated","total_value":68497.11,"total_display":"68,497.11","shares_owned_after":3800.0,"shares_owned_after_display":"3,800","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-03-01","filed_date":"2022-03-01","scope":"insider"},{"id":5381639,"accession":"0001567619-21-021193","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-21-021193","line_url":"/filing/0001567619-21-021193#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1600.0,"shares_display":"1,600","price_per_share":77.365,"price_display":"77.36","price_state":"stated","total_value":123784.0,"total_display":"123,784.00","shares_owned_after":4900.0,"shares_owned_after_display":"4,900","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-11-23","filed_date":"2021-11-26","scope":"insider"},{"id":5156890,"accession":"0001567619-21-016264","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-21-016264","line_url":"/filing/0001567619-21-016264#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1750.0,"shares_display":"1,750","price_per_share":71.9941,"price_display":"71.99","price_state":"stated","total_value":125989.675,"total_display":"125,989.68","shares_owned_after":4750.0,"shares_owned_after_display":"4,750","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-08-24","filed_date":"2021-08-24","scope":"insider"},{"id":5121387,"accession":"0001567619-21-010449","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-21-010449","line_url":"/filing/0001567619-21-010449#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2450.0,"shares_display":"2,450","price_per_share":76.4315,"price_display":"76.43","price_state":"stated","total_value":187257.175,"total_display":"187,257.18","shares_owned_after":4750.0,"shares_owned_after_display":"4,750","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-05-17","filed_date":"2021-05-17","scope":"insider"},{"id":5120847,"accession":"0001567619-21-005257","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-21-005257","line_url":"/filing/0001567619-21-005257#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1050.0,"shares_display":"1,050","price_per_share":59.3365,"price_display":"59.34","price_state":"stated","total_value":62303.325,"total_display":"62,303.32","shares_owned_after":5450.0,"shares_owned_after_display":"5,450","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-03-02","filed_date":"2021-03-02","scope":"insider"},{"id":2999633,"accession":"0001567619-20-019016","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-20-019016","line_url":"/filing/0001567619-20-019016#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1200.0,"shares_display":"1,200","price_per_share":58.5475,"price_display":"58.55","price_state":"stated","total_value":70257.0,"total_display":"70,257.00","shares_owned_after":4750.0,"shares_owned_after_display":"4,750","ownership_form":"D","is_10b5_1":null,"transaction_date":"2020-11-09","filed_date":"2020-11-10","scope":"insider"},{"id":2271449,"accession":"0001567619-20-016516","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-20-016516","line_url":"/filing/0001567619-20-016516#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1050.0,"shares_display":"1,050","price_per_share":65.9671,"price_display":"65.97","price_state":"stated","total_value":69265.455,"total_display":"69,265.46","shares_owned_after":4200.0,"shares_owned_after_display":"4,200","ownership_form":"D","is_10b5_1":null,"transaction_date":"2020-09-08","filed_date":"2020-09-08","scope":"insider"},{"id":2762698,"accession":"0001567619-20-012187","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-20-012187","line_url":"/filing/0001567619-20-012187#line-1","is_derivative":false,"issuer_cik":"0001158324","issuer_name":"COGENT COMMUNICATIONS HOLDINGS, INC.","issuer_ticker":"CCOI","issuer_name_source":null,"issuer_url":"/issuer/0001158324","owner_cik":"0001790695","owner_name":"Kennedy Sheryl Lynn","owner_url":"/insider/0001790695","role":"Director","officer_title":null,"security_title":"common stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1750.0,"shares_display":"1,750","price_per_share":75.539,"price_display":"75.54","price_state":"stated","total_value":132193.25,"total_display":"132,193.25","shares_owned_after":3500.0,"shares_owned_after_display":"3,500","ownership_form":"D","is_10b5_1":null,"transaction_date":"2020-06-11","filed_date":"2020-06-16","scope":"insider"}],"next_cursor":null,"ledger_fault":false,"count":{"value":23,"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":23,"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":23},"affiliations":[{"type":"issuer","type_label":"ISSUER","cik":"0001158324","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","url":"/issuer/0001158324","role":"Director","n_filings":23,"first_seen":"2020-06-16","last_seen":"2026-05-18"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0001790695","retrieved_at":"2026-08-22T04:34:43+00:00","coverage":{"filings":1505395,"transactions":4290787,"issuers":28597,"insiders":152303,"first_filed_date":"2003-06-30","last_filed_date":"2026-08-20","last_ingest":"2026-08-21T05:23:33.898496+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"}}