{"transactions":[{"id":1120069,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"common stock","published_at":"2025-06-06T13:16:12.000Z","date":"2025-06-04","kind":"sale","planned":false,"acquired":false,"shares":2000,"price":47.4996,"value":94999.2,"ownership":{"direct":true},"balance_after":55142,"source":{"system":"sec-edgar","filing":"0001415889-25-015884","document":"form4-06062025_010608.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000141588925015884/form4-06062025_010608.xml","form_type":"4"}},{"id":1223429,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"common stock","published_at":"2025-03-05T16:42:01.000Z","date":"2025-03-04","kind":"sale","planned":false,"acquired":false,"shares":2000,"price":71.6741,"value":143348.2,"ownership":{"direct":true},"balance_after":57142,"source":{"system":"sec-edgar","filing":"0001415889-25-006878","document":"form4-03052025_040357.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000141588925006878/form4-03052025_040357.xml","form_type":"4"}},{"id":1304486,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"common stock","published_at":"2025-01-13T21:58:12.000Z","date":"2025-01-09","kind":"grant","planned":false,"acquired":true,"shares":9600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares of restricted stock will vest in four equal quarterly installments starting on March 1, 2028."}],"balance_after":59142,"source":{"system":"sec-edgar","filing":"0001415889-25-001388","document":"form4-01132025_090108.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000141588925001388/form4-01132025_090108.xml","form_type":"4"}},{"id":1337584,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"common stock","published_at":"2024-12-10T23:00:22.000Z","date":"2024-12-09","kind":"sale","planned":false,"acquired":false,"shares":1920,"price":76.5966,"value":147065.472,"ownership":{"direct":true},"balance_after":49542,"source":{"system":"sec-edgar","filing":"0001415889-24-028881","document":"form4-12102024_111218.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000141588924028881/form4-12102024_111218.xml","form_type":"4"}},{"id":1345582,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"common stock","published_at":"2024-12-03T22:54:05.000Z","date":"2024-12-02","kind":"sale","planned":false,"acquired":false,"shares":1920,"price":81.4213,"value":156328.896,"ownership":{"direct":true},"balance_after":51462,"source":{"system":"sec-edgar","filing":"0001415889-24-028184","document":"form4-12032024_101201.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000141588924028184/form4-12032024_101201.xml","form_type":"4"}},{"id":1345581,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"common stock","published_at":"2024-12-03T22:54:05.000Z","date":"2024-12-01","kind":"grant","planned":false,"acquired":true,"shares":2400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 24, 2021, the reporting person was granted an award of restricted stock units, which vest in the form of common stock based upon the Issuer's achievement of certain performance goals. The Issuer's Board of Directors, and its Compensation Committee, determined that the performance goals had been met, resulting in the vesting of these shares on December 1, 2024 under the terms of the grant."}],"balance_after":53382,"source":{"system":"sec-edgar","filing":"0001415889-24-028184","document":"form4-12032024_101201.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000141588924028184/form4-12032024_101201.xml","form_type":"4"}},{"id":1414267,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"common stock","published_at":"2024-09-05T20:44:53.000Z","date":"2024-09-04","kind":"sale","planned":true,"acquired":false,"shares":1920,"price":69.77,"value":133958.4,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to Mr. Bubeck's structured sale plan (10b5-1) adopted on December 9, 2022."}],"balance_after":50982,"source":{"system":"sec-edgar","filing":"0001415889-24-022939","document":"form4-09052024_080949.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000141588924022939/form4-09052024_080949.xml","form_type":"4"}},{"id":1493032,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"common stock","published_at":"2024-06-04T20:16:42.000Z","date":"2024-06-03","kind":"sale","planned":true,"acquired":false,"shares":1920,"price":58.9693,"value":113221.056,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to Mr. Bubeck's structured sale plan (10b5-1) adopted on December 9, 2022."}],"balance_after":52902,"source":{"system":"sec-edgar","filing":"0001415889-24-015335","document":"form4-06042024_080639.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000141588924015335/form4-06042024_080639.xml","form_type":"4"}},{"id":1603891,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"common stock","published_at":"2024-03-04T22:29:24.000Z","date":"2024-03-01","kind":"sale","planned":true,"acquired":false,"shares":1920,"price":76.6186,"value":147107.712,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to Mr. Bubeck's structured sale plan (10b5-1) adopted on December 9, 2022."}],"balance_after":54822,"source":{"system":"sec-edgar","filing":"0001415889-24-006319","document":"form4-03042024_100309.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000141588924006319/form4-03042024_100309.xml","form_type":"4"}},{"id":1685844,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"common stock","published_at":"2024-01-05T19:40:36.000Z","date":"2024-01-03","kind":"grant","planned":false,"acquired":true,"shares":10000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"The award vests on January 3, 2027, provided that Mr. Bubeck shall be employed through and on that vesting date"}],"balance_after":56742,"source":{"system":"sec-edgar","filing":"0001415889-24-000759","document":"form4-01052024_070129.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000141588924000759/form4-01052024_070129.xml","form_type":"4"}},{"id":1685843,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"common stock","published_at":"2024-01-05T19:40:36.000Z","date":"2024-01-03","kind":"grant","planned":false,"acquired":true,"shares":9600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares of restricted stock will vest in four equal quarterly installments starting on March 1, 2027."}],"balance_after":46742,"source":{"system":"sec-edgar","filing":"0001415889-24-000759","document":"form4-01052024_070129.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000141588924000759/form4-01052024_070129.xml","form_type":"4"}},{"id":1720309,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"common stock","published_at":"2023-12-06T18:49:19.000Z","date":"2023-12-05","kind":"sale","planned":false,"acquired":false,"shares":1920,"price":66.1236,"value":126957.312,"ownership":{"direct":true},"balance_after":37142,"source":{"system":"sec-edgar","filing":"0001415889-23-015921","document":"form4-12062023_061211.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000141588923015921/form4-12062023_061211.xml","form_type":"4"}},{"id":1724203,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"common stock","published_at":"2023-12-04T18:46:27.000Z","date":"2023-12-01","kind":"sale","planned":true,"acquired":false,"shares":1920,"price":63.6963,"value":122296.896,"ownership":{"direct":true},"balance_after":39062,"source":{"system":"sec-edgar","filing":"0001415889-23-015728","document":"form4-12042023_061222.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000141588923015728/form4-12042023_061222.xml","form_type":"4"}},{"id":1725738,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"common stock","published_at":"2023-12-01T21:32:42.000Z","date":"2023-12-01","kind":"grant","planned":true,"acquired":true,"shares":2400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"On February 14, 2020, the reporting person was granted an award of restricted stock units, which vest in the form of common stock based upon the Issuer's achievement of certain performance goals. The Issuer's Board of Directors, and its Compensation Committee, determined that the performance goals had been met, resulting in the vesting of these shares on December 1, 2023 under the terms of the grant."}],"balance_after":40982,"source":{"system":"sec-edgar","filing":"0001415889-23-015693","document":"form4-12012023_091235.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000141588923015693/form4-12012023_091235.xml","form_type":"4"}},{"id":1789559,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"common stock","published_at":"2023-09-05T16:57:20.000Z","date":"2023-09-01","kind":"sale","planned":true,"acquired":false,"shares":1920,"price":70.9596,"value":136242.432,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to Mr. Bubeck's structured sale plan (10b5-1) adopted on December 9, 2022."}],"balance_after":38582,"source":{"system":"sec-edgar","filing":"0001415889-23-012890","document":"form4-09052023_040914.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000141588923012890/form4-09052023_040914.xml","form_type":"4"}},{"id":1870439,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF REVENUE OFFICER"}}],"security":"common stock","published_at":"2023-06-02T18:19:40.000Z","date":"2023-06-01","kind":"sale","planned":true,"acquired":false,"shares":1920,"price":61.0678,"value":117250.176,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to Mr. Bubeck's structured sale plan (10b5-1) adopted on December 9, 2022."}],"balance_after":40502,"source":{"system":"sec-edgar","filing":"0001415889-23-009070","document":"form4-06022023_060634.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000141588923009070/form4-06022023_060634.xml","form_type":"4"}},{"id":1975008,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2023-03-03T15:20:42.000Z","date":"2023-03-01","kind":"sale","acquired":false,"shares":1920,"price":64.4884,"value":123817.728,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to Mr. Bubeck's structured sale plan (10b5-1)."}],"balance_after":42422,"source":{"system":"sec-edgar","filing":"0001567619-23-004287","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761923004287/doc1.xml","form_type":"4"}},{"id":2063261,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2023-01-05T14:02:35.000Z","date":"2023-01-03","kind":"grant","acquired":true,"shares":9600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares of restricted stock will vest in four equal quarterly installments starting on March 1, 2026."}],"balance_after":44342,"source":{"system":"sec-edgar","filing":"0001567619-23-000404","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761923000404/doc1.xml","form_type":"4"}},{"id":2091315,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2022-12-09T15:47:48.000Z","date":"2022-12-05","kind":"sale","acquired":false,"shares":1920,"price":57.4497,"value":110303.424,"ownership":{"direct":true},"balance_after":34742,"source":{"system":"sec-edgar","filing":"0001567619-22-021441","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761922021441/doc1.xml","form_type":"4"}},{"id":2098690,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2022-12-02T16:54:01.000Z","date":"2022-12-01","kind":"sale","acquired":false,"shares":1920,"price":58.1484,"value":111644.928,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to Mr. Bubeck's structured sale plan (10b5-1)."}],"balance_after":36662,"source":{"system":"sec-edgar","filing":"0001567619-22-021151","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761922021151/doc1.xml","form_type":"4"}},{"id":2100273,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2022-12-01T15:04:21.000Z","date":"2022-12-01","kind":"grant","acquired":true,"shares":2400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On May 1, 2019, the reporting person was granted an award of restricted stock units, which vest in the form of common stock based upon the Issuer's achievement of certain performance goals. The Issuer's Board of Directors, and its Compensation Committee, determined that the performance goals had been met, resulting in the vesting of these shares on December 1, 2022 under the terms of the grant."}],"balance_after":38582,"source":{"system":"sec-edgar","filing":"0001567619-22-021080","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761922021080/doc1.xml","form_type":"4"}},{"id":2166074,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2022-09-06T22:57:20.000Z","date":"2022-09-01","kind":"sale","acquired":false,"shares":1920,"price":53.5065,"value":102732.48,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to Mr. Bubeck's structured sale plan (10b5-1)."}],"balance_after":36182,"source":{"system":"sec-edgar","filing":"0001567619-22-017087","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761922017087/doc1.xml","form_type":"4"}},{"id":2247869,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2022-06-02T14:43:58.000Z","date":"2022-06-01","kind":"sale","acquired":false,"shares":1920,"price":60.0251,"value":115248.192,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to Mr. Bubeck's structured sale plan (10b5-1)."}],"balance_after":38102,"source":{"system":"sec-edgar","filing":"0001567619-22-012045","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761922012045/doc1.xml","form_type":"4"}},{"id":2361547,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2022-03-02T19:48:15.000Z","date":"2022-03-01","kind":"sale","acquired":false,"shares":1920,"price":62.9386,"value":120842.112,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to Mr. Bubeck's structured sale plan (10b5-1)."}],"balance_after":40022,"source":{"system":"sec-edgar","filing":"0001567619-22-006026","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761922006026/doc1.xml","form_type":"4"}},{"id":2444790,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2022-01-05T21:18:47.000Z","date":"2022-01-03","kind":"grant","acquired":true,"shares":9600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares of restricted stock will vest in four equal quarterly installments starting on March 1, 2025."}],"balance_after":41942,"source":{"system":"sec-edgar","filing":"0001567619-22-000533","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761922000533/doc1.xml","form_type":"4"}},{"id":2472120,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2021-12-15T14:34:39.000Z","date":"2021-12-14","kind":"sale","acquired":false,"shares":1920,"price":76.77,"value":147398.4,"ownership":{"direct":true},"balance_after":32342,"source":{"system":"sec-edgar","filing":"0001567619-21-022071","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761921022071/doc1.xml","form_type":"4"}},{"id":2486560,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2021-12-03T22:06:05.000Z","date":"2021-12-01","kind":"sale","acquired":false,"shares":1920,"price":74.9221,"value":143850.432,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to Mr. Bubeck's structured sale plan (10b5-1)."}],"balance_after":34262,"source":{"system":"sec-edgar","filing":"0001567619-21-021605","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761921021605/doc1.xml","form_type":"4"}},{"id":2490938,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2021-12-01T14:53:13.000Z","date":"2021-12-01","kind":"grant","acquired":true,"shares":2400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 21, 2018, the reporting person was granted an award of restricted stock units, which vest in the form of common stock based upon the Issuer's achievement of certain performance goals. The Issuer's Board of Directors, and its Compensation Committee, determined that the performance goals had been met, resulting in the vesting of these shares on December 1, 2021 under the terms of the grant."}],"balance_after":36182,"source":{"system":"sec-edgar","filing":"0001567619-21-021350","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761921021350/doc1.xml","form_type":"4"}},{"id":2582068,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2021-09-02T14:51:46.000Z","date":"2021-09-01","kind":"sale","acquired":false,"shares":1920,"price":73.637,"value":141383.04,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to Mr. Bubeck's structured sale plan (10b5-1)."}],"balance_after":33782,"source":{"system":"sec-edgar","filing":"0001567619-21-016609","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761921016609/doc1.xml","form_type":"4"}},{"id":2687134,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2021-06-02T17:16:11.000Z","date":"2021-06-01","kind":"sale","acquired":false,"shares":1920,"price":74.9594,"value":143922.048,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to Mr. Bubeck's structured sale plan (10b5-1 plan)"}],"balance_after":35702,"source":{"system":"sec-edgar","filing":"0001567619-21-011497","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761921011497/doc1.xml","form_type":"4"}},{"id":2705859,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2021-05-19T18:08:38.000Z","date":"2021-05-19","kind":"sale","acquired":false,"shares":5000,"price":74.6612,"value":373306.0,"ownership":{"direct":true},"balance_after":37622,"source":{"system":"sec-edgar","filing":"0001567619-21-010713","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761921010713/doc1.xml","form_type":"4"}},{"id":2794975,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2021-03-11T14:56:01.000Z","date":"2021-03-10","kind":"sale","acquired":false,"shares":1920,"price":60.4324,"value":116030.208,"ownership":{"direct":true},"balance_after":42622,"source":{"system":"sec-edgar","filing":"0001567619-21-006071","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761921006071/doc1.xml","form_type":"4"}},{"id":2827011,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2021-03-02T00:28:33.000Z","date":"2021-02-24","kind":"grant","acquired":true,"shares":9600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares of restricted stock will vest in four equal quarterly installments starting on March 1, 2024."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Due to a clerical oversight the ownership reported by Mr. Bubeck on February 24, 2021 was overstated by 3,840 shares.   The correct ownership is reported in this amendment."}],"balance_after":44542,"source":{"system":"sec-edgar","filing":"0001567619-21-005218","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761921005218/doc1.xml","form_type":"4/A","original_submission_date":"2021-02-25"}},{"id":2833220,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2021-02-25T22:22:16.000Z","date":"2021-02-24","kind":"grant","acquired":true,"shares":9600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares of restricted stock will vest in four equal quarterly installments starting on March 1, 2024."}],"balance_after":48382,"source":{"system":"sec-edgar","filing":"0001567619-21-004945","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761921004945/doc1.xml","form_type":"4"}},{"id":2961122,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2020-12-02T22:07:37.000Z","date":"2020-12-01","kind":"sale","acquired":false,"shares":3840,"price":57.94,"value":222489.6,"ownership":{"direct":true},"balance_after":34942,"source":{"system":"sec-edgar","filing":"0001567619-20-020569","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761920020569/doc1.xml","form_type":"4"}},{"id":2961121,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2020-12-02T22:07:37.000Z","date":"2020-12-01","kind":"grant","acquired":true,"shares":2400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On May 3, 2017, the reporting person was granted an award of restricted stock units, which vest in the form of common stock based upon the Issuer's achievement of certain performance goals. The Issuer's Board of Directors, and its Compensation Committee, determined that the performance goals had been met, resulting in the vesting of these shares on December 1, 2020 under the terms of the grant."}],"balance_after":38782,"source":{"system":"sec-edgar","filing":"0001567619-20-020569","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761920020569/doc1.xml","form_type":"4"}},{"id":3041412,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2020-09-02T16:44:06.000Z","date":"2020-09-01","kind":"sale","acquired":false,"shares":1920,"price":67.4688,"value":129540.096,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to  Mr. Bubeck's structured sale plan (10b5-1 plan)."}],"balance_after":36382,"source":{"system":"sec-edgar","filing":"0001567619-20-016307","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761920016307/doc1.xml","form_type":"4"}},{"id":3129295,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2020-06-01T21:12:28.000Z","date":"2020-06-01","kind":"sale","acquired":false,"shares":1920,"price":78.2807,"value":150298.944,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to  Mr. Bubeck's structured sale plan (10b5-1 plan)."}],"balance_after":38302,"source":{"system":"sec-edgar","filing":"0001567619-20-011445","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761920011445/doc1.xml","form_type":"4"}},{"id":3233386,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2020-03-03T15:32:21.000Z","date":"2020-03-02","kind":"sale","acquired":false,"shares":1920,"price":77.4443,"value":148693.056,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to  Mr. Bubeck's structured sale plan (10b5-1 plan)."}],"balance_after":40222,"source":{"system":"sec-edgar","filing":"0001567619-20-005392","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761920005392/doc1.xml","form_type":"4"}},{"id":3267191,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2020-02-18T20:11:09.000Z","date":"2020-02-14","kind":"grant","acquired":true,"shares":9600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares of restricted stock will vest in four equal quarterly installments starting on March 1, 2023."}],"balance_after":42142,"source":{"system":"sec-edgar","filing":"0001567619-20-004158","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761920004158/doc1.xml","form_type":"4"}},{"id":3327499,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2020-01-02T17:07:18.000Z","date":"2019-12-31","kind":"sale","acquired":false,"shares":1920,"price":66.0823,"value":126878.016,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to  Mr. Bubeck's structured sale plan (10b5-1 plan)."}],"balance_after":32542,"source":{"system":"sec-edgar","filing":"0001567619-20-000018","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761920000018/doc1.xml","form_type":"4"}},{"id":3356039,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2019-12-02T22:13:11.000Z","date":"2019-12-02","kind":"sale","acquired":false,"shares":1920,"price":61.762,"value":118583.04,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to  Mr. Bubeck's structured sale plan (10b5-1 plan)."}],"balance_after":34462,"source":{"system":"sec-edgar","filing":"0001567619-19-022477","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761919022477/doc1.xml","form_type":"4"}},{"id":3401341,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2019-10-02T15:11:50.000Z","date":"2019-10-01","kind":"sale","acquired":false,"shares":250,"price":54.8009,"value":13700.225,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to  Mr. Bubeck's structured sale plan (10b5-1 plan)."}],"balance_after":36382,"source":{"system":"sec-edgar","filing":"0001567619-19-019017","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761919019017/doc1.xml","form_type":"4"}},{"id":3423488,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2019-09-04T16:10:12.000Z","date":"2019-09-03","kind":"sale","acquired":false,"shares":1920,"price":59.7709,"value":114760.128,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to  Mr. Bubeck's structured sale plan (10b5-1 plan)."}],"balance_after":36632,"source":{"system":"sec-edgar","filing":"0001567619-19-017839","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761919017839/doc1.xml","form_type":"4"}},{"id":3471646,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2019-07-02T14:53:40.000Z","date":"2019-07-01","kind":"sale","acquired":false,"shares":250,"price":59.2752,"value":14818.8,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to  Mr. Bubeck's structured sale plan (10b5-1 plan)."}],"balance_after":38552,"source":{"system":"sec-edgar","filing":"0001567619-19-014212","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761919014212/doc1.xml","form_type":"4"}},{"id":3502708,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2019-06-04T15:22:17.000Z","date":"2019-06-03","kind":"sale","acquired":false,"shares":1920,"price":57.4068,"value":110221.056,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to  Mr. Bubeck's structured sale plan (10b5-1 plan)."}],"balance_after":38802,"source":{"system":"sec-edgar","filing":"0001567619-19-012644","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761919012644/doc1.xml","form_type":"4"}},{"id":3544532,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2019-05-01T22:04:55.000Z","date":"2019-05-01","kind":"grant","acquired":true,"shares":9600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares of restricted stock will vest in four equal quarterly installments starting on March 1, 2022."}],"balance_after":40722,"source":{"system":"sec-edgar","filing":"0001567619-19-009580","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761919009580/doc1.xml","form_type":"4"}},{"id":3569151,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2019-04-02T15:20:05.000Z","date":"2019-04-01","kind":"sale","acquired":false,"shares":250,"price":53.734,"value":13433.5,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to  Mr. Bubeck's structured sale plan (10b5-1 plan)."}],"balance_after":31122,"source":{"system":"sec-edgar","filing":"0001567619-19-008107","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761919008107/doc1.xml","form_type":"4"}},{"id":3619656,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2019-03-04T19:10:35.000Z","date":"2019-03-01","kind":"sale","acquired":false,"shares":1920,"price":48.9934,"value":94067.328,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to  Mr. Bubeck's structured sale plan (10b5-1 plan)."}],"balance_after":31372,"source":{"system":"sec-edgar","filing":"0001567619-19-005967","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761919005967/doc1.xml","form_type":"4"}},{"id":3709545,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2019-01-03T19:40:46.000Z","date":"2019-01-02","kind":"sale","acquired":false,"shares":250,"price":44.508,"value":11127.0,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"The sale of shares of common stock reported here was implemented pursuant to  Mr. Bubeck's structured sale plan (10b5-1 plan)."}],"balance_after":33292,"source":{"system":"sec-edgar","filing":"0001567619-19-000218","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000156761919000218/doc1.xml","form_type":"4"}},{"id":3937252,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2018-05-11T16:40:48.000Z","date":"2018-05-11","kind":"sale","acquired":false,"shares":2000,"price":50.362,"value":100724.0,"ownership":{"direct":true},"balance_after":33542,"source":{"system":"sec-edgar","filing":"0001140361-18-022963","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000114036118022963/doc1.xml","form_type":"4"}},{"id":4020493,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2018-03-02T22:28:56.000Z","date":"2018-03-02","kind":"sale","acquired":false,"shares":300,"price":43.005,"value":12901.5,"ownership":{"direct":true},"balance_after":35542,"source":{"system":"sec-edgar","filing":"0001140361-18-011732","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000114036118011732/doc1.xml","form_type":"4"}},{"id":4040833,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2018-02-22T21:49:17.000Z","date":"2018-02-21","kind":"grant","acquired":true,"shares":9600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares of restricted stock will vest in four equal quarterly installments starting on March 1, 2021."}],"balance_after":35842,"source":{"system":"sec-edgar","filing":"0001140361-18-009638","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000114036118009638/doc1.xml","form_type":"4"}},{"id":4142349,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2017-12-05T14:18:24.000Z","date":"2017-12-01","kind":"sale","acquired":false,"shares":250,"price":46.655,"value":11663.75,"ownership":{"direct":true},"balance_after":26242,"source":{"system":"sec-edgar","filing":"0001140361-17-044970","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000114036117044970/doc1.xml","form_type":"4"}},{"id":4235447,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2017-08-14T18:49:30.000Z","date":"2017-08-11","kind":"sale","acquired":false,"shares":500,"price":43.5624,"value":21781.2,"ownership":{"direct":true},"balance_after":26492,"source":{"system":"sec-edgar","filing":"0001140361-17-031871","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000114036117031871/doc1.xml","form_type":"4"}},{"id":4293216,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2017-06-05T14:16:04.000Z","date":"2017-06-01","kind":"sale","acquired":false,"shares":300,"price":39.8745,"value":11962.35,"ownership":{"direct":true},"balance_after":26992,"source":{"system":"sec-edgar","filing":"0001140361-17-023711","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000114036117023711/doc1.xml","form_type":"4"}},{"id":4335564,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2017-05-03T20:18:01.000Z","date":"2017-05-03","kind":"grant","acquired":true,"shares":9600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares of restricted stock will vest in four equal quarterly installments starting on March 1, 2020."}],"balance_after":27292,"source":{"system":"sec-edgar","filing":"0001140361-17-018112","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000114036117018112/doc1.xml","form_type":"4"}},{"id":4338309,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2017-05-02T17:35:11.000Z","date":"2017-03-17","kind":"sale","acquired":false,"shares":100,"price":41.8753,"value":4187.53,"ownership":{"direct":true},"balance_after":17692,"source":{"system":"sec-edgar","filing":"0001140361-17-017823","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000114036117017823/doc1.xml","form_type":"4"}},{"id":4338308,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2017-05-02T17:35:11.000Z","date":"2017-03-01","kind":"sale","acquired":false,"shares":300,"price":41.625,"value":12487.5,"ownership":{"direct":true},"balance_after":17792,"source":{"system":"sec-edgar","filing":"0001140361-17-017823","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000114036117017823/doc1.xml","form_type":"4"}},{"id":4560787,"issuer":{"id":1298,"kind":"organization","name":"COGENT COMMUNICATIONS HOLDINGS, INC.","symbol":"CCOI"},"owners":[{"id":78810,"kind":"person","name":"BUBECK JAMES","position":1,"cik":"0001654298","reported_name":"BUBECK JAMES","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Revenue Officer"}}],"security":"common stock","published_at":"2016-11-10T19:51:01.000Z","date":"2016-11-09","kind":"sale","acquired":false,"shares":800,"price":39.76,"value":31808.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"A portion of these securities is not vested."}],"balance_after":18092,"source":{"system":"sec-edgar","filing":"0001140361-16-085801","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1158324/000114036116085801/doc1.xml","form_type":"4"}}]}