NASDAQ:CCOI | Historical Stock Price | COGENT COMMUNICATIONS HOLDINGS, INC.

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
2002-02-05 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$3.62$7.63$16.06$33.84$71.30$150.222002-02-052026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

View year

Historical Stock Price — 2017

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2017-12-29$45.30$55.00256,100
2017-12-28$45.80$55.61410,000
2017-12-27$44.95$54.57300,800
2017-12-26$44.65$54.21340,700
2017-12-22$44.35$53.84237,600
2017-12-21$44.90$54.51331,500
2017-12-20$45.20$54.88322,100
2017-12-19$45.90$55.73286,300
2017-12-18$46.75$56.76430,800
2017-12-15$46.25$56.15757,800
2017-12-14$46.85$56.88426,000
2017-12-13$46.95$57.00385,000
2017-12-12$46.25$56.15323,500
2017-12-11$46.10$55.97409,500
2017-12-08$45.35$55.06382,200
2017-12-07$45.68$55.46623,100
2017-12-06$44.15$53.60538,800
2017-12-05$44.70$54.27321,400
2017-12-04$45.40$55.12248,200
2017-12-01$46.85$56.88419,300
2017-11-30$46.85$56.88319,500
2017-11-29$46.90$56.94233,100
2017-11-28$47.20$57.30184,100
2017-11-27$46.85$56.88166,200
2017-11-24$47.05$57.12150,400
2017-11-22$45.80$55.61318,300
2017-11-21$46.45$56.39699,100
2017-11-20$48.50$58.88284,400
2017-11-17$46.95$57.00206,800
2017-11-16$46.40$56.33255,100
2017-11-15$45.85$55.08283,400
2017-11-14$45.85$55.08309,400
2017-11-13$44.95$54.00215,800
2017-11-10$45.50$54.66218,200
2017-11-09$45.80$55.02308,600
2017-11-08$46.25$55.56306,400
2017-11-07$46.05$55.32446,200
2017-11-06$44.75$53.76872,400
2017-11-03$42.60$51.181,412,200
2017-11-02$47.00$56.461,686,600
2017-11-01$53.55$64.33681,700
2017-10-31$53.90$64.75442,400
2017-10-30$52.40$62.95358,800
2017-10-27$52.70$63.31290,900
2017-10-26$51.50$61.87189,300
2017-10-25$50.95$61.21242,000
2017-10-24$49.95$60.01209,100
2017-10-23$49.30$59.23214,300
2017-10-20$49.65$59.65241,200
2017-10-19$50.00$60.07178,000
2017-10-18$49.75$59.77281,300
2017-10-17$49.88$59.92215,800
2017-10-16$49.50$59.47206,800
2017-10-13$50.00$60.07296,600
2017-10-12$49.90$59.95278,500
2017-10-11$49.80$59.83248,000
2017-10-10$49.90$59.95271,400
2017-10-09$48.40$58.15473,900
2017-10-06$50.85$61.09277,600
2017-10-05$51.35$61.69257,000
2017-10-04$51.35$61.69364,300
2017-10-03$50.90$61.15275,000
2017-10-02$49.45$59.41370,300
2017-09-29$48.90$58.75375,100
2017-09-28$50.05$60.13300,600
2017-09-27$49.70$59.71524,700
2017-09-26$48.95$58.81260,000
2017-09-25$48.75$58.57288,100
2017-09-22$48.15$57.85333,800
2017-09-21$47.90$57.55235,200
2017-09-20$48.25$57.97601,500
2017-09-19$48.10$57.79311,700
2017-09-18$47.80$57.43375,800
2017-09-15$47.85$57.49705,900
2017-09-14$46.35$55.68533,900
2017-09-13$46.40$55.74523,000
2017-09-12$45.30$54.42229,900
2017-09-11$44.05$52.92411,800
2017-09-08$44.40$53.34218,000
2017-09-07$44.30$53.22217,000
2017-09-06$45.05$54.12265,500
2017-09-05$46.05$55.32298,300
2017-09-01$46.70$56.10300,600
2017-08-31$46.60$55.98319,600
2017-08-30$45.40$54.54267,500
2017-08-29$45.60$54.78443,800
2017-08-28$44.85$53.88248,300
2017-08-25$44.60$53.58225,800
2017-08-24$44.70$53.70326,800
2017-08-23$43.65$52.44325,200
2017-08-22$42.65$51.24443,000
2017-08-21$42.85$51.48345,600
2017-08-18$42.25$50.76320,400
2017-08-17$43.10$51.78464,700
2017-08-16$43.50$52.26347,100
2017-08-15$43.70$51.95421,500
2017-08-14$44.05$52.36282,200
2017-08-11$43.65$51.89225,400
2017-08-10$44.05$52.36335,400
2017-08-09$43.60$51.83338,600
2017-08-08$43.20$51.35289,700
2017-08-07$43.20$51.35342,800
2017-08-04$43.85$52.13532,200
2017-08-03$42.35$50.34674,200
2017-08-02$40.60$48.26723,900
2017-08-01$41.25$49.04716,600
2017-07-31$41.75$49.63879,600
2017-07-28$44.20$52.54245,300
2017-07-27$44.05$52.36266,000
2017-07-26$43.75$52.01320,800
2017-07-25$43.60$51.83370,100
2017-07-24$43.50$51.71455,100
2017-07-21$44.55$52.96352,400
2017-07-20$43.45$51.65402,500
2017-07-19$43.15$51.29341,100
2017-07-18$42.80$50.88232,100
2017-07-17$42.05$49.99339,400
2017-07-14$41.20$48.98257,300
2017-07-13$40.45$48.08507,900
2017-07-12$42.05$49.99812,300
2017-07-11$40.95$48.68302,300
2017-07-10$40.90$48.62278,200
2017-07-07$40.65$48.32294,100
2017-07-06$39.95$47.49303,200
2017-07-05$40.28$47.88260,600
2017-07-03$40.30$47.91165,400
2017-06-30$40.10$47.67380,900
2017-06-29$39.60$47.07208,500
2017-06-28$39.65$47.13298,100
2017-06-27$39.40$46.84183,400
2017-06-26$39.45$46.90136,900
2017-06-23$39.80$47.31299,200
2017-06-22$39.05$46.42421,200
2017-06-21$38.65$45.94252,800
2017-06-20$39.45$46.90154,400
2017-06-19$40.00$47.55198,800
2017-06-16$40.70$48.38760,200
2017-06-15$40.65$48.32285,800
2017-06-14$41.95$49.87262,400
2017-06-13$41.65$49.51192,900
2017-06-12$41.15$48.92305,800
2017-06-09$40.25$47.85224,000
2017-06-08$40.50$48.14185,100
2017-06-07$39.80$47.31293,400
2017-06-06$40.35$47.97233,200
2017-06-05$40.65$48.32233,000
2017-06-02$41.10$48.86329,600
2017-06-01$40.65$48.32256,200
2017-05-31$39.40$46.84292,900
2017-05-30$39.80$47.31361,700
2017-05-26$39.30$46.72514,500
2017-05-25$40.15$47.73266,400
2017-05-24$39.15$46.54235,900
2017-05-23$38.75$46.06379,700
2017-05-22$38.70$46.00323,300
2017-05-19$38.15$45.35633,200
2017-05-18$38.20$45.41554,000
2017-05-17$39.15$46.54259,000
2017-05-16$40.05$47.61261,800
2017-05-15$40.65$47.80235,800
2017-05-12$39.85$46.86297,700
2017-05-11$40.35$47.45290,300
2017-05-10$41.35$48.62334,400
2017-05-09$41.55$48.86332,200
2017-05-08$40.75$47.92331,100
2017-05-05$40.00$47.03398,700
2017-05-04$41.20$48.45712,200
2017-05-03$43.33$50.95326,800
2017-05-02$44.00$51.74396,600
2017-05-01$44.95$52.86153,100
2017-04-28$45.00$52.91226,700
2017-04-27$44.90$52.80119,600
2017-04-26$44.90$52.80231,300
2017-04-25$44.65$52.50311,600
2017-04-24$43.95$51.68441,800
2017-04-21$43.85$51.56233,200
2017-04-20$44.60$52.44157,200
2017-04-19$44.35$52.15207,000
2017-04-18$44.10$51.86146,300
2017-04-17$44.40$52.21165,400
2017-04-13$43.50$51.15240,900
2017-04-12$44.50$52.33280,600
2017-04-11$44.15$51.91206,300
2017-04-10$43.75$51.44258,100
2017-04-07$43.60$51.27240,800
2017-04-06$43.00$50.56204,500
2017-04-05$42.75$50.27320,000
2017-04-04$43.30$50.91209,900
2017-04-03$43.05$50.62308,100
2017-03-31$43.05$50.62293,400
2017-03-30$43.05$50.62197,100
2017-03-29$42.95$50.50166,500
2017-03-28$42.30$49.74193,900
2017-03-27$42.00$49.39206,600
2017-03-24$42.40$49.86257,900
2017-03-23$41.85$49.21155,300
2017-03-22$42.35$49.80247,200
2017-03-21$42.60$50.09306,300
2017-03-20$42.95$50.50510,000
2017-03-17$42.15$49.56670,400
2017-03-16$41.80$49.15210,400
2017-03-15$41.68$49.01403,800
2017-03-14$40.65$47.80419,600
2017-03-13$40.65$47.80200,400
2017-03-10$40.15$47.21241,100
2017-03-09$39.55$46.51298,700
2017-03-08$38.90$45.74317,600
2017-03-07$39.45$45.89378,800
2017-03-06$39.90$46.42307,400
2017-03-03$40.35$46.94299,200
2017-03-02$41.15$47.87406,200
2017-03-01$42.25$49.15425,000
2017-02-28$41.45$48.22323,700
2017-02-27$42.40$49.33393,500
2017-02-24$42.55$49.50626,100
2017-02-23$42.25$49.15739,500
2017-02-22$42.45$49.38514,900
2017-02-21$42.78$49.77368,300
2017-02-17$42.10$48.98267,000
2017-02-16$41.85$48.69228,100
2017-02-15$41.90$48.74227,900
2017-02-14$41.50$48.28153,600
2017-02-13$41.50$48.28140,700
2017-02-10$41.50$48.28138,000
2017-02-09$41.50$48.28146,800
2017-02-08$41.00$47.70358,100
2017-02-07$41.45$48.22242,600
2017-02-06$41.60$48.40174,400
2017-02-03$42.05$48.92234,100
2017-02-02$41.65$48.45266,700
2017-02-01$41.30$48.05272,900
2017-01-31$41.80$48.63221,400
2017-01-30$41.80$48.63251,000
2017-01-27$42.15$49.03239,100
2017-01-26$41.80$48.63197,800
2017-01-25$41.50$48.28167,800
2017-01-24$41.65$48.45232,500
2017-01-23$41.55$48.34209,700
2017-01-20$41.75$48.57519,200
2017-01-19$41.65$48.45353,200
2017-01-18$42.15$49.03196,300
2017-01-17$42.15$49.03269,600
2017-01-13$41.90$48.74318,600
2017-01-12$41.40$48.16339,100
2017-01-11$41.40$48.16202,200
2017-01-10$41.50$48.28156,700
2017-01-09$41.45$48.22264,000
2017-01-06$41.65$48.45260,100
2017-01-05$41.90$48.74507,300
2017-01-04$42.40$49.33383,000
2017-01-03$41.85$48.69426,600