InsidersTradesSigma
Total declarations
Company
▲ Purchases (0 ops.)
▼ Sales (18 ops.)
Insider track record
ExecutiveDisclosed buys
0
Disclosed sells
18
Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Signal history
Discover the detailed record of transactions filed by Chang John B., Directeur Juridique. Officer active across 1 company, notably Cogent Communications Holdings, INC.. Cumulatively, 38 filings have been logged. Split: 0 buy · 18 sells. Total volume traded: €1.4m. Activity tracked since 30 April 2021. The latest transaction was filed on 31 December 2025 (Attribution). Regulator: SEC (Form 4). All data is free.
Companies and markets linked to Chang John B.
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
Declarations38 total
9,600 shares0common stockSEC:0001775672-26-000003:0
2,400 shares0common stockSEC:0001775672-25-000005:0
398 shares0common stockSEC:0001415889-25-015394:0
756 shares0common stockSEC:0001415889-25-013104:0
357 shares0common stockSEC:0001415889-25-010577:0
357 shares0common stockSEC:0001415889-25-007754:0
715 shares0common stockSEC:0001415889-25-007317:0
9,600 shares0common stockSEC:0001415889-25-001376:0
970 shares0common stockSEC:0001415889-24-029871:0
900 shares0common stockSEC:0001415889-24-028467:0
2,400 shares0common stockSEC:0001415889-24-028065:0
2,280 shares@ US$80.406810.4% of flowcommon stockSEC:0001415889-24-026600:0
1,400 shares@ US$71.675.5% of flowcommon stockSEC:0001415889-24-023378:0
2,055 shares@ US$74.008.3% of flowcommon stockSEC:0001415889-24-022218:0
375 shares0common stockSEC:0001415889-24-002199:0
9,600 shares0common stockSEC:0001415889-24-001956:0
9,600 shares0common stockSEC:0001415889-24-000743:0
3,550 shares@ US$76.0014.8% of flowcommon stockSEC:0001415889-23-016976:0
1,000 shares@ US$74.004.1% of flowcommon stockSEC:0001415889-23-016899:0
900 shares0common stockSEC:0001415889-23-016783:0
500 shares@ US$72.002.0% of flowcommon stockSEC:0001415889-23-016507:0
3,000 shares@ US$69.0011.6% of flowcommon stockSEC:0001415889-23-016184:0
2,400 shares0common stockSEC:0001415889-23-015680:0
2,500 shares@ US$72.009.8% of flowcommon stockSEC:0001415889-23-007274:0
500 shares@ US$70.001.9% of flowcommon stockSEC:0001415889-23-006584:0
25 of 38 declarations
About Chang John B.
Chang John B. is Directeur Juridique at Cogent Communications Holdings, INC., where he is also VP & CHIEF LEGAL OFFICER. He has filed 38 forms in total, and across the sampled recent filings covering the period from 2021-05-03 to 2026-01-05, the transactions are sales for a total of EUR 1581589.
