InsidersTradesSigma
Total declarations
Company
▲ Purchases (0 ops.)
▼ Sales (20 ops.)
Insider track record
ExecutiveDisclosed buys
0
Disclosed sells
20
T+90 hit rate
14%
T+90 mean return
-14.6%
Across 14 buy signals with a settled T+90 return. Return basis: close on the day after publication.
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 · 20 sells. Total volume traded: €1.5m. Activity tracked since 30 April 2021. The latest transaction was filed on 13 May 2025 (Don). Regulator: SEC (Form 4). All data is free.
Declarations38 total
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
2,000 shares@ US$70.007.8% of flowcommon stockSEC:0001567619-23-001676:0
500 shares@ US$68.001.9% of flowcommon stockSEC:0001567619-23-001324:0
1,000 shares@ US$66.003.7% of flowcommon stockSEC:0001567619-23-000970:0
25 of 38 declarations
About Chang John B.
Chang John B. is the VP & Chief Legal Officer at COGENT COMMUNICATIONS HOLDINGS, INC. In this role, he oversees the company's legal affairs and is involved in strategic decision-making. His expertise in business law allows him to effectively manage legal risks and advise management. He collaborates with other executives to ensure compliance and good governance.
