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.

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Historical Stock Price — 2006

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2006-12-29$16.22$16.22174,900
2006-12-28$16.02$16.02175,000
2006-12-27$16.05$16.05374,500
2006-12-26$15.16$15.16136,800
2006-12-22$15.28$15.28194,600
2006-12-21$15.82$15.82515,500
2006-12-20$15.69$15.69338,700
2006-12-19$15.24$15.24886,200
2006-12-18$15.15$15.15448,700
2006-12-15$15.68$15.68684,700
2006-12-14$15.85$15.85433,300
2006-12-13$15.87$15.87327,800
2006-12-12$16.22$16.22228,700
2006-12-11$16.18$16.18432,100
2006-12-08$16.51$16.51452,700
2006-12-07$16.67$16.67134,300
2006-12-06$16.62$16.62258,200
2006-12-05$16.71$16.71362,400
2006-12-04$16.65$16.65461,600
2006-12-01$15.90$15.90368,500
2006-11-30$15.85$15.85514,600
2006-11-29$15.55$15.551,541,800
2006-11-28$15.50$15.50399,200
2006-11-27$15.65$15.65426,500
2006-11-24$16.20$16.2099,700
2006-11-22$16.15$16.15206,100
2006-11-21$16.20$16.20343,000
2006-11-20$16.40$16.40715,100
2006-11-17$16.53$16.53385,200
2006-11-16$16.34$16.34334,700
2006-11-15$15.94$15.94331,000
2006-11-14$16.22$16.22569,000
2006-11-13$15.20$15.20749,100
2006-11-10$16.22$16.22539,200
2006-11-09$15.30$15.30874,800
2006-11-08$15.09$15.09524,800
2006-11-07$15.29$15.29397,300
2006-11-06$15.11$15.111,090,300
2006-11-03$14.00$14.00399,800
2006-11-02$14.22$14.22288,300
2006-11-01$14.04$14.04453,700
2006-10-31$14.16$14.16295,500
2006-10-30$14.05$14.05628,000
2006-10-27$14.77$14.77549,500
2006-10-26$14.75$14.75716,100
2006-10-25$14.59$14.59610,100
2006-10-24$14.12$14.12394,000
2006-10-23$14.16$14.16556,200
2006-10-20$13.48$13.48242,000
2006-10-19$13.82$13.82568,100
2006-10-18$13.99$13.991,326,200
2006-10-17$13.64$13.641,123,300
2006-10-16$12.73$12.73158,200
2006-10-13$12.31$12.31228,100
2006-10-12$12.10$12.10250,100
2006-10-11$12.05$12.05199,800
2006-10-10$12.28$12.28214,100
2006-10-09$12.20$12.20228,600
2006-10-06$12.09$12.09590,000
2006-10-05$11.96$11.96419,800
2006-10-04$11.49$11.49504,700
2006-10-03$11.24$11.24149,800
2006-10-02$11.31$11.31252,900
2006-09-29$11.59$11.59505,500
2006-09-28$11.28$11.28414,700
2006-09-27$11.38$11.38365,100
2006-09-26$10.95$10.95324,300
2006-09-25$10.78$10.78317,100
2006-09-22$10.88$10.88195,700
2006-09-21$11.07$11.07620,300
2006-09-20$11.17$11.17612,100
2006-09-19$10.53$10.53858,900
2006-09-18$10.00$10.00218,400
2006-09-15$10.01$10.01747,500
2006-09-14$9.36$9.36378,900
2006-09-13$9.19$9.19270,800
2006-09-12$8.79$8.79174,800
2006-09-11$8.45$8.45233,800
2006-09-08$8.54$8.54190,900
2006-09-07$8.55$8.55184,900
2006-09-06$8.66$8.66181,000
2006-09-05$8.98$8.98291,600
2006-09-01$8.90$8.90359,800
2006-08-31$9.28$9.28149,700
2006-08-30$9.17$9.17177,600
2006-08-29$8.81$8.81191,100
2006-08-28$8.55$8.55146,100
2006-08-25$8.38$8.38124,600
2006-08-24$8.23$8.23514,100
2006-08-23$7.82$7.82338,000
2006-08-22$8.11$8.11192,500
2006-08-21$8.19$8.19100,000
2006-08-18$8.45$8.45111,900
2006-08-17$8.16$8.16247,200
2006-08-16$7.97$7.97220,300
2006-08-15$8.06$8.06488,700
2006-08-14$7.97$7.97205,000
2006-08-11$8.00$8.00223,700
2006-08-10$8.26$8.26157,700
2006-08-09$8.50$8.50452,200
2006-08-08$8.21$8.21128,800
2006-08-07$8.28$8.28102,900
2006-08-04$8.32$8.32345,000
2006-08-03$8.42$8.42206,600
2006-08-02$8.53$8.53175,700
2006-08-01$8.62$8.62369,500
2006-07-31$8.97$8.97157,300
2006-07-28$8.98$8.98123,900
2006-07-27$9.10$9.10133,600
2006-07-26$9.12$9.12185,600
2006-07-25$8.99$8.9979,200
2006-07-24$9.13$9.1399,400
2006-07-21$8.79$8.79139,700
2006-07-20$9.03$9.03102,800
2006-07-19$9.15$9.15308,100
2006-07-18$8.87$8.87202,600
2006-07-17$8.67$8.67470,000
2006-07-14$8.16$8.16390,100
2006-07-13$8.66$8.66327,100
2006-07-12$8.76$8.7642,300
2006-07-11$9.01$9.01139,500
2006-07-10$9.06$9.06152,800
2006-07-07$9.39$9.39618,000
2006-07-06$9.62$9.62433,700
2006-07-05$9.69$9.69319,500
2006-07-03$9.71$9.71240,000
2006-06-30$9.37$9.371,644,500
2006-06-29$9.17$9.17390,000
2006-06-28$8.90$8.90216,100
2006-06-27$8.80$8.80267,800
2006-06-26$8.77$8.77356,700
2006-06-23$8.71$8.71244,600
2006-06-22$8.71$8.71237,300
2006-06-21$8.50$8.50482,600
2006-06-20$8.00$8.00310,100
2006-06-19$8.41$8.41511,800
2006-06-16$8.80$8.80348,700
2006-06-15$8.83$8.83311,200
2006-06-14$8.29$8.29209,100
2006-06-13$8.33$8.33621,800
2006-06-12$8.50$8.50293,600
2006-06-09$8.96$8.96345,000
2006-06-08$9.05$9.05510,800
2006-06-07$9.26$9.26541,000
2006-06-06$9.19$9.19543,800
2006-06-05$9.12$9.12695,600
2006-06-02$9.00$9.004,679,300
2006-06-01$9.30$9.30611,800
2006-05-31$9.20$9.20310,200
2006-05-30$9.20$9.20379,100
2006-05-26$9.62$9.62170,600
2006-05-25$9.39$9.39267,900
2006-05-24$9.37$9.37534,000
2006-05-23$10.04$10.04184,400
2006-05-22$10.22$10.22356,100
2006-05-19$10.83$10.83510,500
2006-05-18$11.43$11.43177,900
2006-05-17$11.20$11.20100,800
2006-05-16$11.64$11.64114,300
2006-05-15$11.66$11.66147,600
2006-05-12$11.87$11.87268,600
2006-05-11$11.40$11.40309,000
2006-05-10$11.13$11.13267,200
2006-05-09$11.51$11.51143,300
2006-05-08$11.61$11.6196,500
2006-05-05$11.74$11.74168,500
2006-05-04$12.10$12.10100,100
2006-05-03$12.10$12.10476,100
2006-05-02$11.60$11.60378,100
2006-05-01$10.87$10.87219,800
2006-04-28$10.55$10.55115,900
2006-04-27$10.77$10.77250,900
2006-04-26$10.40$10.40151,700
2006-04-25$10.48$10.48226,000
2006-04-24$10.47$10.47611,400
2006-04-21$10.53$10.53141,500
2006-04-20$10.61$10.61291,300
2006-04-19$10.26$10.26295,500
2006-04-18$10.07$10.07232,000
2006-04-17$9.85$9.85236,600
2006-04-13$9.89$9.89307,100
2006-04-12$9.40$9.40296,100
2006-04-11$9.63$9.63949,800
2006-04-10$10.26$10.261,297,500
2006-04-07$10.19$10.19136,600
2006-04-06$10.08$10.08246,900
2006-04-05$10.25$10.25337,900
2006-04-04$10.20$10.20375,300
2006-04-03$10.15$10.15497,200
2006-03-31$9.75$9.75393,900
2006-03-30$9.55$9.55523,300
2006-03-29$9.16$9.16308,500
2006-03-28$8.99$8.99364,700
2006-03-27$8.60$8.60238,300
2006-03-24$8.58$8.58185,900
2006-03-23$8.80$8.80356,100
2006-03-22$9.03$9.03326,000
2006-03-21$9.19$9.19322,500
2006-03-20$9.25$9.25327,000
2006-03-17$9.18$9.18546,100
2006-03-16$8.13$8.13104,900
2006-03-15$8.10$8.10111,100
2006-03-14$8.03$8.0372,100
2006-03-13$8.00$8.00158,400
2006-03-10$8.17$8.17208,300
2006-03-09$7.71$7.71178,100
2006-03-08$7.57$7.57249,300
2006-03-07$7.44$7.44423,700
2006-03-06$7.88$7.88272,600
2006-03-03$7.89$7.89424,000
2006-03-02$7.31$7.31277,500
2006-03-01$7.12$7.12108,400
2006-02-28$7.15$7.15252,700
2006-02-27$7.22$7.22102,300
2006-02-24$7.25$7.2579,700
2006-02-23$7.20$7.2056,000
2006-02-22$7.03$7.0366,600
2006-02-21$6.87$6.8754,700
2006-02-17$7.00$7.00151,400
2006-02-16$6.90$6.90122,600
2006-02-15$6.58$6.5860,800
2006-02-14$6.40$6.4041,000
2006-02-13$6.22$6.2236,600
2006-02-10$6.40$6.4024,500
2006-02-09$6.42$6.4246,500
2006-02-08$6.41$6.4150,800
2006-02-07$6.34$6.3471,300
2006-02-06$6.58$6.5833,400
2006-02-03$6.59$6.5967,800
2006-02-02$6.69$6.6955,100
2006-02-01$6.70$6.7058,800
2006-01-31$6.55$6.55183,400
2006-01-30$6.40$6.40201,300
2006-01-27$6.52$6.5264,400
2006-01-26$6.66$6.66155,900
2006-01-25$6.79$6.79138,100
2006-01-24$6.70$6.70115,000
2006-01-23$6.68$6.6893,400
2006-01-20$6.63$6.63323,300
2006-01-19$6.35$6.35192,200
2006-01-18$6.08$6.08157,100
2006-01-17$6.19$6.19180,200
2006-01-13$6.41$6.41389,300
2006-01-12$6.00$6.00400,400
2006-01-11$6.01$6.01126,400
2006-01-10$5.58$5.5863,200
2006-01-09$5.41$5.4176,900
2006-01-06$5.49$5.4998,500
2006-01-05$5.25$5.2570,100
2006-01-04$5.31$5.31117,100
2006-01-03$5.35$5.3572,100