John B. Chang Cogent Communications Holdings, Inc. (CCOI) insider trading activity

John B. Chang is VP & CHIEF LEGAL OFFICER of COGENT COMMUNICATIONS HOLDINGS, INC.. Currently has a direct ownership of 77,245 shares of CCOI, which is worth approximately $3.53 Million. The most recent transaction as insider was on May 13, 2025, when has been sold 756 shares (Common Stock) at a price of $0.0 per share, resulting in proceeds of $0. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 77.2K

2.75% 3M change

2.95% 12M change

Total Value Held $3.53 Million

John B. Chang Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
May 13 2025	SELL Bona fide gift	-	756 Reduced 0.97%	77,245 Common Stock
Apr 10 2025	SELL Bona fide gift	-	357 Reduced 0.46%	78,001 Common Stock
Mar 10 2025	SELL Bona fide gift	-	357 Reduced 0.45%	78,358 Common Stock
Mar 05 2025	SELL Bona fide gift	-	715 Reduced 0.9%	78,715 Common Stock
Jan 09 2025	BUY Grant, award, or other acquisition	-	9,600 Added 10.78%	79,430 Common Stock
Dec 18 2024	SELL Bona fide gift	-	970 Reduced 1.37%	69,830 Common Stock
Dec 04 2024	SELL Bona fide gift	-	900 Reduced 1.26%	70,800 Common Stock
Dec 01 2024	BUY Grant, award, or other acquisition	-	2,400 Added 3.24%	71,700 Common Stock
Nov 12 2024	SELL Open market or private sale	$183,334 $80.41 p/Share	2,280 Reduced 3.19%	69,300 Common Stock
Sep 12 2024	SELL Open market or private sale	$100,338 $71.67 p/Share	1,400 Reduced 1.92%	71,580 Common Stock
Aug 23 2024	SELL Open market or private sale	$152,070 $74.0 p/Share	2,055 Reduced 2.74%	72,980 Common Stock
Feb 01 2024	SELL Bona fide gift	-	375 Reduced 0.5%	75,035 Common Stock
Jan 03 2024	BUY Grant, award, or other acquisition	-	39,600 Added 33.7%	77,910 Common Stock
Dec 26 2023	SELL Open market or private sale	$269,800 $76.0 p/Share	3,550 Reduced 8.48%	38,310 Common Stock
Dec 21 2023	SELL Open market or private sale	$74,000 $74.0 p/Share	1,000 Reduced 2.33%	41,860 Common Stock
Dec 20 2023	SELL Bona fide gift	-	900 Reduced 2.06%	42,860 Common Stock
Dec 14 2023	SELL Open market or private sale	$36,000 $72.0 p/Share	500 Reduced 1.13%	43,760 Common Stock
Dec 11 2023	SELL Sale (or disposition) back to the issuer	$207,000 $69.0 p/Share	3,000 Reduced 6.35%	44,260 Common Stock
Dec 01 2023	BUY Grant, award, or other acquisition	-	2,400 Added 4.83%	47,260 Common Stock
May 03 2023	SELL Open market or private sale	$365,000 $73.0 p/Share	5,000 Reduced 10.56%	42,360 Common Stock
Apr 17 2023	SELL Open market or private sale	$35,000 $70.0 p/Share	500 Reduced 1.04%	47,360 Common Stock
Feb 01 2023	SELL Open market or private sale	$140,000 $70.0 p/Share	2,000 Reduced 4.01%	47,860 Common Stock
Jan 26 2023	SELL Open market or private sale	$34,000 $68.0 p/Share	500 Reduced 0.99%	49,860 Common Stock
Jan 17 2023	SELL Open market or private sale	$66,000 $66.0 p/Share	1,000 Reduced 1.95%	50,360 Common Stock
Jan 12 2023	SELL Open market or private sale	$96,000 $64.0 p/Share	1,500 Reduced 2.84%	51,360 Common Stock

JBC

John B. Chang

VP & CHIEF LEGAL OFFICER

Washington, DC

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