Chang John B.

CIK 00017756721 companyWASHINGTON, DC

SEC Profile

Transactions

Companies

Filings

CIK

0001775672

Recent Transactions

50 trades

Award
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2025-12-31+100,000→ 188,847 total
Award
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2025-12-31+9,600→ 88,847 total
Award
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2025-12-01+2,400→ 79,247 total
Gift
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2025-06-02−398→ 76,847 total
Gift
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2025-05-13+504→ 3,089 total
Gift
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2025-05-13−756→ 77,245 total
Gift
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2025-04-10−357→ 78,001 total
Gift
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2025-03-10−357→ 78,358 total
Gift
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2025-03-05+715→ 2,585 total
Gift
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2025-03-05−715→ 78,715 total
Award
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2025-01-09+9,600→ 79,430 total
Gift
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2024-12-18+485→ 935 total
Gift
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2024-12-18+485→ 935 total
Gift
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2024-12-18−970→ 69,830 total
Gift
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2024-12-04−900→ 70,800 total
Award
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2024-12-01+2,400→ 71,700 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2024-11-12$80.41/sh−2,280→ 69,300 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2024-09-12$71.67/sh−1,400→ 71,580 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2024-08-23$74.00/sh−2,055→ 72,980 total
Gift
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2024-02-01−375→ 75,035 total
Gift
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2024-02-01+375→ 375 total
Award
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2024-01-03+30,000→ 75,410 total
Award
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2024-01-03+9,600→ 47,910 total
Award
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2024-01-03+30,000→ 77,910 total
Award
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2024-01-03+9,600→ 45,410 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2023-12-26$76.00/sh−3,550→ 38,310 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2023-12-21$74.00/sh−1,000→ 41,860 total
Gift
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2023-12-20−900→ 42,860 total
Gift
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2023-12-20+450→ 450 total
Gift
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2023-12-20+450→ 450 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2023-12-14$72.00/sh−500→ 43,760 total
Disposition to Issuer
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2023-12-11$69.00/sh−3,000→ 44,260 total
Award
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2023-12-01+2,400→ 47,260 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2023-05-03$72.00/sh−2,500→ 44,860 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2023-05-03$74.00/sh−2,500→ 42,360 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2023-04-17$70.00/sh−500→ 47,360 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2023-02-01$70.00/sh−2,000→ 47,860 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2023-01-26$68.00/sh−500→ 49,860 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2023-01-17$66.00/sh−1,000→ 50,360 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2023-01-12$64.00/sh−1,500→ 51,360 total
Award
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2023-01-03+9,600→ 52,860 total
Award
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2022-12-01+2,400→ 43,260 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2022-04-06$72.00/sh−250→ 40,860 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2022-04-05$70.00/sh−250→ 41,110 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2022-04-01$68.00/sh−150→ 41,360 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2022-03-31$66.00/sh−150→ 41,510 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2022-03-17$62.96/sh−600→ 41,660 total
Award
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2022-01-03+9,600→ 42,260 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2021-05-10$80.00/sh−558→ 32,660 total
Sale
COGENT COMMUNICATIONS HOLDINGS, INC.$CCOI
common stock
2021-04-30$75.00/sh−558→ 33,218 total

Companies

COGENT COMMUNICATIONS HOLDINGS, INC.
VP & CHIEF LEGAL OFFICER
$CCOI

Recent Filings

Address

2450 N ST NW 4TH FLOOR

WASHINGTON, DC, 20037

View on SEC.gov