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Total declarations
Company
▲ Purchases (0 ops.)
▼ Sales (18 ops.)
Latest filing published 05 Jan 2026 for Cogent Communications Holdings, INC.. Read the official filing
Filing timeline
BuySaleJohn B. Chang
Insider track record
Disclosed buys
0
Disclosed sells
18
Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Signal history
John B. Chang: trading record in brief
This profile gathers the share dealings of John B. Chang in Cogent Communications Holdings, Inc., where the filings describe the role as senior executive. In total, 38 filings cover trades dated from 30 April 2021 to 31 December 2025.
Every open-market trade on record is a sale: 18 sales worth €1.4M. The rest of the record consists of 10 share grants.
Most recently, on 5 January 2026, the filings show a share grant in Cogent Communications Holdings, Inc. Typically, a trade is published a median of 1 day after it takes place. Section 16 rules allow two business days to file each Form 4. Keep in mind that insiders sell for many reasons unrelated to the outlook, from tax bills to estate planning. This summary is built from SEC (Form 4) disclosures alone and does not predict where the share price will go.
Companies and markets linked to John B. Chang
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
