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 — 2005

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2005-12-30$5.49$5.49207,500
2005-12-29$5.43$5.43103,900
2005-12-28$5.51$5.5149,100
2005-12-27$5.50$5.5062,600
2005-12-23$5.70$5.7066,400
2005-12-22$5.40$5.401,668,300
2005-12-21$5.45$5.4553,300
2005-12-20$5.52$5.5252,600
2005-12-19$5.38$5.3869,300
2005-12-16$5.35$5.35107,300
2005-12-15$5.29$5.2993,500
2005-12-14$5.21$5.2176,500
2005-12-13$5.40$5.4085,400
2005-12-12$5.56$5.5650,500
2005-12-09$5.66$5.6643,200
2005-12-08$5.71$5.7154,500
2005-12-07$5.93$5.9349,200
2005-12-06$5.94$5.9489,000
2005-12-05$5.95$5.95168,500
2005-12-02$6.13$6.13214,600
2005-12-01$5.61$5.61103,900
2005-11-30$5.42$5.4295,600
2005-11-29$5.29$5.2942,500
2005-11-28$5.18$5.1856,800
2005-11-25$5.40$5.409,100
2005-11-23$5.45$5.45113,100
2005-11-22$5.20$5.20100,400
2005-11-21$5.10$5.10113,400
2005-11-18$4.82$4.8250,000
2005-11-17$4.65$4.6548,800
2005-11-16$4.68$4.6839,100
2005-11-15$4.71$4.7170,500
2005-11-14$4.66$4.66103,200
2005-11-11$4.65$4.65145,400
2005-11-10$5.10$5.10243,000
2005-11-09$4.67$4.6774,400
2005-11-08$4.80$4.8086,300
2005-11-07$5.04$5.0489,200
2005-11-04$4.97$4.9737,500
2005-11-03$4.98$4.98130,400
2005-11-02$5.29$5.2965,800
2005-11-01$5.08$5.0868,400
2005-10-31$5.25$5.25103,400
2005-10-28$4.82$4.8235,500
2005-10-27$4.80$4.8039,100
2005-10-26$4.88$4.8836,100
2005-10-25$4.90$4.9025,000
2005-10-24$4.91$4.9120,900
2005-10-21$4.87$4.8741,200
2005-10-20$4.73$4.7335,300
2005-10-19$4.82$4.8243,500
2005-10-18$4.65$4.6564,100
2005-10-17$4.39$4.3943,100
2005-10-14$4.32$4.32161,000
2005-10-13$4.39$4.39222,900
2005-10-12$4.60$4.60112,600
2005-10-11$4.69$4.6979,600
2005-10-10$4.60$4.60129,900
2005-10-07$4.60$4.6047,100
2005-10-06$4.66$4.6692,300
2005-10-05$4.89$4.89124,000
2005-10-04$5.27$5.27101,700
2005-10-03$4.98$4.9874,200
2005-09-30$4.88$4.88130,100
2005-09-29$4.90$4.90149,800
2005-09-28$4.74$4.7465,800
2005-09-27$4.91$4.9153,600
2005-09-26$4.93$4.9331,700
2005-09-23$4.86$4.8637,900
2005-09-22$4.85$4.8547,900
2005-09-21$4.86$4.86165,700
2005-09-20$5.21$5.21513,700
2005-09-19$4.66$4.66147,000
2005-09-16$4.88$4.88106,900
2005-09-15$4.88$4.8893,200
2005-09-14$4.89$4.8918,000
2005-09-13$4.97$4.9756,400
2005-09-12$4.99$4.99115,300
2005-09-09$4.98$4.98108,000
2005-09-08$4.91$4.9166,800
2005-09-07$4.93$4.9387,600
2005-09-06$4.75$4.75174,900
2005-09-02$4.64$4.6456,500
2005-09-01$4.66$4.66106,700
2005-08-31$4.58$4.58275,800
2005-08-30$4.86$4.86231,700
2005-08-29$5.04$5.0457,500
2005-08-26$5.09$5.0966,300
2005-08-25$5.10$5.1033,500
2005-08-24$5.07$5.07352,500
2005-08-23$5.06$5.06227,900
2005-08-22$5.27$5.2791,400
2005-08-19$5.30$5.3059,600
2005-08-18$5.43$5.43104,300
2005-08-17$5.49$5.49239,700
2005-08-16$5.39$5.39234,600
2005-08-15$5.21$5.21529,800
2005-08-12$5.75$5.751,313,100
2005-08-11$7.41$7.41184,400
2005-08-10$7.11$7.11113,400
2005-08-09$7.40$7.40198,600
2005-08-08$7.72$7.72370,000
2005-08-05$8.10$8.10217,800
2005-08-04$8.15$8.15371,200
2005-08-03$8.12$8.12802,000
2005-08-02$7.70$7.70792,300
2005-08-01$7.24$7.24183,400
2005-07-29$7.25$7.25645,600
2005-07-28$7.55$7.551,134,900
2005-07-27$7.10$7.10180,100
2005-07-26$7.12$7.12264,500
2005-07-25$7.01$7.0194,300
2005-07-22$7.05$7.0545,700
2005-07-21$7.05$7.0551,600
2005-07-20$7.01$7.01101,400
2005-07-19$7.14$7.14123,000
2005-07-18$7.22$7.22215,100
2005-07-15$7.34$7.34436,400
2005-07-14$6.51$6.5182,300
2005-07-13$6.36$6.36151,000
2005-07-12$6.53$6.5373,100
2005-07-11$6.43$6.43107,300
2005-07-08$6.21$6.21249,700
2005-07-07$6.35$6.3573,900
2005-07-06$6.43$6.4370,700
2005-07-05$6.38$6.3858,500
2005-07-01$6.33$6.33256,100
2005-06-30$6.64$6.6486,900
2005-06-29$6.70$6.70153,400
2005-06-28$6.84$6.84228,200
2005-06-27$6.97$6.97240,400
2005-06-24$7.06$7.06559,800
2005-06-23$6.98$6.98195,500
2005-06-22$7.11$7.11457,900
2005-06-21$7.11$7.11149,100
2005-06-20$7.08$7.08459,000
2005-06-17$7.19$7.19312,600
2005-06-16$7.13$7.13340,300
2005-06-15$7.02$7.02488,700
2005-06-14$7.04$7.04566,300
2005-06-13$6.98$6.98710,700
2005-06-10$6.68$6.681,272,200
2005-06-09$6.60$6.601,679,500
2005-06-08$7.15$7.155,372,400
2005-06-07$10.12$10.121,599,600
2005-06-06$21.71$21.71133,400
2005-06-03$22.28$22.2835,600
2005-06-02$23.46$23.4668,400
2005-06-01$23.90$23.9038,900
2005-05-31$23.01$23.01222,000
2005-05-27$24.00$24.0086,800
2005-05-26$26.80$26.8067,200
2005-05-25$27.13$27.13100,900
2005-05-24$25.50$25.5055,300
2005-05-23$25.01$25.0159,500
2005-05-20$23.04$23.0446,000
2005-05-19$21.75$21.7536,100
2005-05-18$19.01$19.0123,400
2005-05-17$18.27$18.2734,800
2005-05-16$18.39$18.3935,100
2005-05-13$17.45$17.4529,000
2005-05-12$16.10$16.1022,900
2005-05-11$18.55$18.5510,200
2005-05-10$19.75$19.7525,200
2005-05-09$20.30$20.3039,100
2005-05-06$20.30$20.3078,600
2005-05-05$15.50$15.5014,300
2005-05-04$13.75$13.7510,700
2005-05-03$13.84$13.844,800
2005-05-02$13.75$13.7523,000
2005-04-29$13.43$13.4315,400
2005-04-28$12.21$12.215,600
2005-04-27$12.24$12.241,100
2005-04-26$12.12$12.121,800
2005-04-25$12.20$12.20200
2005-04-22$12.20$12.205,600
2005-04-21$12.54$12.5420,100
2005-04-20$12.50$12.5016,900
2005-04-19$11.50$11.501,400
2005-04-18$11.45$11.45600
2005-04-15$11.61$11.6116,800
2005-04-14$11.30$11.303,200
2005-04-13$11.33$11.33400
2005-04-12$11.37$11.374,700
2005-04-11$10.99$10.995,500
2005-04-08$11.40$11.407,000
2005-04-07$11.60$11.6014,500
2005-04-06$10.84$10.8417,900
2005-04-05$10.72$10.7218,300
2005-04-04$11.31$11.311,300
2005-04-01$11.58$11.5814,400
2005-03-31$12.50$12.5034,800
2005-03-30$9.45$9.457,000
2005-03-29$8.94$8.9421,800
2005-03-28$9.06$9.0639,800
2005-03-24$10.15$10.1590,400
2005-03-23$12.80$12.808,180
2005-03-22$13.00$13.00295
2005-03-21$12.60$12.601,825
2005-03-18$12.60$12.602,715
2005-03-17$10.80$10.803,035
2005-03-16$11.60$11.607,710
2005-03-15$12.00$12.007,975
2005-03-14$12.40$12.402,085
2005-03-11$13.00$13.002,270
2005-03-10$13.00$13.002,960
2005-03-09$12.80$12.807,750
2005-03-08$13.40$13.407,995
2005-03-07$11.00$11.009,580
2005-03-04$12.40$12.401,455
2005-03-03$12.60$12.601,555
2005-03-02$12.80$12.803,150
2005-03-01$13.60$13.603,090
2005-02-28$13.00$13.0019,495
2005-02-25$13.00$13.008,975
2005-02-24$16.00$16.002,250
2005-02-23$16.20$16.205,275
2005-02-22$17.60$17.6014,520
2005-02-18$22.80$22.8020,455
2005-02-17$17.00$17.001,980
2005-02-16$15.80$15.802,030
2005-02-15$15.40$15.40790
2005-02-14$15.80$15.801,920
2005-02-11$14.40$14.40770
2005-02-10$14.40$14.401,140
2005-02-09$15.80$15.80580
2005-02-08$14.00$14.001,260
2005-02-07$13.60$13.602,100
2005-02-04$13.00$13.001,175
2005-02-03$13.60$13.601,250
2005-02-02$13.20$13.201,075
2005-02-01$12.80$12.803,225
2005-01-31$12.20$12.204,925
2005-01-28$15.20$15.202,265
2005-01-27$16.60$16.602,385
2005-01-26$16.40$16.40795
2005-01-25$16.20$16.201,780
2005-01-24$16.80$16.802,720
2005-01-21$16.60$16.602,630
2005-01-20$15.40$15.401,875
2005-01-19$16.20$16.202,120
2005-01-18$15.60$15.601,705
2005-01-14$14.20$14.202,340
2005-01-13$14.80$14.803,895
2005-01-12$16.00$16.001,030
2005-01-11$17.20$17.206,830
2005-01-10$18.40$18.401,660
2005-01-07$18.20$18.201,515
2005-01-06$19.60$19.60935
2005-01-05$21.00$21.001,300
2005-01-04$19.60$19.603,730
2005-01-03$21.60$21.602,870