Cogent Communications Holdings (CCOI)
Cogent Communications Holdings on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as communications services, nec.
7.1M
Short interest
settlement 2026-10-15
3.8
Days to cover
+1.4 days vs prior
61.1%
Short share of volume
2026-10-28
65,964
Fails to deliver
settlement 2026-09-21
Mon 16 Nov
Next earnings
estimated date
-$68K
Insider flow, 90 days
0 buys, 2 sells
As of 2026-10-28.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in CCOI is 7,108,242 shares, up 244,939 shares over the last month. Over the last 48 readings it ranged from 3,138,891 shares (13 December 2024) to 7,419,016 shares (27 February 2026). The latest reading sits at the top of that range. At the reported average volume of 1.9M shares a day that is 3.8 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 7,108,242 | +18.4% | 1,875,378 | 3.79 |
| 2026-09-30 | 6,005,450 | -12.5% | 2,541,173 | 2.36 |
| 2026-09-15 | 6,863,303 | -4.3% | 1,929,816 | 3.56 |
| 2026-08-31 | 7,172,491 | +6.3% | 1,583,402 | 4.53 |
| 2026-08-14 | 6,747,898 | -3.0% | 2,139,484 | 3.15 |
| 2026-07-31 | 6,954,163 | +0.3% | 1,090,521 | 6.38 |
| 2026-07-15 | 6,936,709 | -2.4% | 1,231,517 | 5.63 |
| 2026-06-30 | 7,109,316 | +22.4% | 1,684,332 | 4.22 |
| 2026-06-15 | 5,808,070 | -4.0% | 924,884 | 6.28 |
| 2026-05-29 | 6,048,557 | +15.7% | 1,273,294 | 4.75 |
| 2026-05-15 | 5,230,217 | -1.3% | 1,981,505 | 2.64 |
| 2026-04-30 | 5,297,480 | -7.9% | 832,145 | 6.37 |
| 2026-04-15 | 5,750,362 | -1.6% | 862,698 | 6.67 |
| 2026-03-31 | 5,842,448 | -12.4% | 1,221,185 | 4.78 |
| 2026-03-13 | 6,673,628 | -10.1% | 1,171,062 | 5.70 |
| 2026-02-27 | 7,419,016 | +22.1% | 2,019,124 | 3.67 |
| 2026-02-13 | 6,074,190 | +10.2% | 974,027 | 6.24 |
| 2026-01-30 | 5,511,079 | -7.4% | 666,534 | 8.27 |
| 2026-01-15 | 5,951,263 | -8.3% | 902,607 | 6.59 |
| 2025-12-31 | 6,486,402 | +11.5% | 1,457,667 | 4.45 |
| 2025-12-15 | 5,818,148 | -9.2% | 1,350,024 | 4.31 |
| 2025-11-28 | 6,404,577 | -4.1% | 1,979,868 | 3.23 |
| 2025-11-14 | 6,676,850 | -6.5% | 2,748,994 | 2.43 |
| 2025-10-31 | 7,140,690 | +12.3% | 992,474 | 7.19 |
| 2025-10-15 | 6,361,292 | +4.2% | 1,038,604 | 6.12 |
| 2025-09-30 | 6,103,736 | +0.7% | 1,521,980 | 4.01 |
| 2025-09-15 | 6,061,638 | +11.2% | 1,651,854 | 3.67 |
| 2025-08-29 | 5,450,913 | -1.6% | 1,581,444 | 3.45 |
| 2025-08-15 | 5,539,546 | +12.9% | 2,329,070 | 2.38 |
| 2025-07-31 | 4,907,942 | -1.6% | 679,586 | 7.22 |
| 2025-07-15 | 4,986,902 | -3.7% | 407,831 | 12.23 |
| 2025-06-30 | 5,177,533 | +1.3% | 828,128 | 6.25 |
| 2025-06-13 | 5,110,170 | -1.9% | 767,425 | 6.66 |
| 2025-05-30 | 5,207,893 | +24.8% | 988,241 | 5.27 |
| 2025-05-15 | 4,172,466 | -6.0% | 825,033 | 5.06 |
| 2025-04-30 | 4,440,653 | -1.4% | 427,171 | 10.40 |
| 2025-04-15 | 4,504,867 | +19.9% | 894,664 | 5.04 |
| 2025-03-31 | 3,755,627 | -1.3% | 490,473 | 7.66 |
| 2025-03-14 | 3,804,087 | +3.5% | 436,429 | 8.72 |
| 2025-02-28 | 3,674,860 | -1.7% | 414,541 | 8.86 |
| 2025-02-14 | 3,739,926 | +8.5% | 275,374 | 13.58 |
| 2025-01-31 | 3,447,395 | -8.2% | 293,920 | 11.73 |
| 2025-01-15 | 3,757,121 | +3.8% | 417,745 | 8.99 |
| 2024-12-31 | 3,620,559 | +15.3% | 480,875 | 7.53 |
| 2024-12-13 | 3,138,891 | -17.4% | 399,527 | 7.86 |
| 2024-11-29 | 3,801,009 | -0.5% | 410,585 | 9.26 |
| 2024-11-15 | 3,818,164 | -6.2% | 420,441 | 9.08 |
| 2024-10-31 | 4,072,239 | -1.9% | 283,130 | 14.38 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 28 October 2026, the short share of CCOI volume is 61.1%, up 9.3 points over the last five sessions. Over the last 30 readings it ranged from 40.5% (19 October 2026) to 66.4% (8 October 2026). The latest reading is 7.5 points above the 30-session average of 53.6%, on 545K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-28 | 333K | 545K | 61.1% | 1 |
| 2026-10-27 | 411K | 663K | 62.0% | 38 |
| 2026-10-26 | 245K | 427K | 57.5% | 0 |
| 2026-10-23 | 208K | 395K | 52.6% | 200 |
| 2026-10-22 | 288K | 477K | 60.4% | 0 |
| 2026-10-21 | 263K | 509K | 51.8% | 5,447 |
| 2026-10-20 | 168K | 378K | 44.4% | 0 |
| 2026-10-19 | 158K | 391K | 40.5% | 4,450 |
| 2026-10-16 | 1.2M | 1.9M | 62.4% | 55,735 |
| 2026-10-15 | 251K | 528K | 47.6% | 17,059 |
| 2026-10-14 | 394K | 741K | 53.3% | 12,314 |
| 2026-10-13 | 256K | 521K | 49.2% | 2,604 |
| 2026-10-12 | 218K | 412K | 52.9% | 8,476 |
| 2026-10-09 | 270K | 534K | 50.6% | 4,510 |
| 2026-10-08 | 429K | 646K | 66.4% | 0 |
| 2026-10-07 | 282K | 536K | 52.6% | 197 |
| 2026-10-06 | 314K | 585K | 53.7% | 1 |
| 2026-10-05 | 384K | 677K | 56.7% | 1,976 |
| 2026-10-02 | 435K | 752K | 57.9% | 0 |
| 2026-10-01 | 594K | 981K | 60.6% | 0 |
| 2026-09-30 | 430K | 1.0M | 41.8% | 0 |
| 2026-09-29 | 276K | 572K | 48.2% | 3,053 |
| 2026-09-28 | 354K | 620K | 57.0% | 400 |
| 2026-09-25 | 356K | 622K | 57.3% | 337 |
| 2026-09-24 | 462K | 995K | 46.5% | 9,584 |
| 2026-09-23 | 372K | 832K | 44.7% | 5,637 |
| 2026-09-22 | 221K | 447K | 49.5% | 1,117 |
| 2026-09-21 | 268K | 619K | 43.3% | 336 |
| 2026-09-18 | 462K | 743K | 62.2% | 23 |
| 2026-09-17 | 458K | 737K | 62.2% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 21 September 2026, the fails-to-deliver balance in CCOI is 65,964 shares, up 57,192 shares over the last settlement date. Over the last 30 readings it ranged from 4 shares (17 August 2026) to 429,870 shares (10 September 2026).
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-21 | 65,964 | $9.01 | $594K |
| 2026-09-17 | 8,772 | $8.67 | $76K |
| 2026-09-16 | 462 | $9.25 | $4K |
| 2026-09-14 | 5 | $9.33 | $47 |
| 2026-09-11 | 121,133 | $9.09 | $1.1M |
| 2026-09-10 | 429,870 | $9.33 | $4.0M |
| 2026-09-09 | 180 | $9.64 | $2K |
| 2026-09-08 | 43 | $10.05 | $432 |
| 2026-09-01 | 8,885 | $9.54 | $85K |
| 2026-08-31 | 458 | $9.48 | $4K |
| 2026-08-27 | 116 | $10.05 | $1K |
| 2026-08-26 | 96 | $9.88 | $948 |
| 2026-08-25 | 66 | $9.49 | $626 |
| 2026-08-24 | 250,732 | $9.17 | $2.3M |
| 2026-08-21 | 41,140 | $10.01 | $412K |
| 2026-08-20 | 24,888 | $10.37 | $258K |
| 2026-08-19 | 400 | $10.13 | $4K |
| 2026-08-17 | 4 | $11.31 | $45 |
| 2026-08-12 | 640 | $10.82 | $7K |
| 2026-08-10 | 15,024 | $9.92 | $149K |
| 2026-08-07 | 52,705 | $10.91 | $575K |
| 2026-07-01 | 81,135 | $13.88 | $1.1M |
| 2026-06-30 | 3,946 | $13.14 | $52K |
| 2026-06-29 | 80,701 | $13.41 | $1.1M |
| 2026-06-03 | 339 | $17.40 | $6K |
| 2026-06-01 | 133 | $17.76 | $2K |
| 2026-05-19 | 15,339 | $17.22 | $264K |
| 2026-05-18 | 25,459 | $16.48 | $420K |
| 2026-05-15 | 1,800 | $16.11 | $29K |
| 2026-04-20 | 1,500 | $23.63 | $35K |
Insider trades
SEC Form 4, newest first. JSONInsiders at CCOI reported 2 open-market sells worth $68K in the last 90 days and no open-market buys. Latest filing: Montagner Marc (Director) on 2026-09-30.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-09-30 | Montagner Marc | Director | Grant | 3K | $0.00 | $0 | 103K |
| 2026-09-30 | BROOKS STEVEN D | Director | Grant | 3K | $0.00 | $0 | 62K |
| 2026-09-30 | de Sa Paul | Director | Grant | 3K | $0.00 | $0 | 37K |
| 2026-09-30 | FERGUSON Lewis H | Director | Grant | 3K | $0.00 | $0 | 28K |
| 2026-09-30 | Howard Eve N | Director | Grant | 3K | $0.00 | $0 | 31K |
| 2026-09-30 | Howell Deneen C | Director | Grant | 3K | $0.00 | $0 | 36K |
| 2026-09-30 | Kennedy Sheryl Lynn | Director | Grant | 3K | $0.00 | $0 | 17K |
| 2026-09-15 | KILMER HENRY W | VP OF NETWORK STRATEGY | Sell | 2K | $9.21 | $22K | 36K |
| 2026-09-02 | WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Sell | 5K | $9.37 | $45K | 193K |
| 2026-06-30 | Howard Eve N | Director | Grant | 3K | $0.00 | $0 | 27K |
| 2026-06-30 | Howell Deneen C | Director | Grant | 3K | $0.00 | $0 | 32K |
| 2026-06-30 | de Sa Paul | Director | Grant | 3K | $0.00 | $0 | 34K |
| 2026-06-30 | BROOKS STEVEN D | Director | Grant | 3K | $0.00 | $0 | 59K |
| 2026-06-30 | Kennedy Sheryl Lynn | Director | Grant | 3K | $0.00 | $0 | 14K |
| 2026-06-30 | Montagner Marc | Director | Grant | 3K | $0.00 | $0 | 100K |
| 2026-06-30 | FERGUSON Lewis H | Director | Grant | 3K | $0.00 | $0 | 25K |
| 2026-06-16 | WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Sell | 5K | $16.79 | $81K | 198K |
| 2026-06-15 | KILMER HENRY W | VP OF NETWORK STRATEGY | Sell | 2K | $17.01 | $41K | 39K |
| 2026-05-28 | FERGUSON Lewis H | Director | Sell | 3K | $20.36 | $57K | 21K |
| 2026-05-14 | Kennedy Sheryl Lynn | Director | Sell | 3K | $16.22 | $54K | 10K |
| 2026-05-04 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Gift | 1.0M | $0.00 | $0 | 1.3M |
| 2026-05-04 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Gift | 1.0M | $0.00 | $0 | 609K |
| 2026-05-04 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Grant | 1.0M | $0.00 | $0 | 1.6M |
| 2026-04-01 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Gift | 29K | $0.00 | $0 | 259K |
| 2026-04-01 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Gift | 29K | $0.00 | $0 | 609K |
| 2026-04-01 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Returned to company | 59K | $0.00 | $0 | 638K |
| 2026-03-31 | Howard Eve N | Director | Grant | 3K | $0.00 | $0 | 24K |
| 2026-03-31 | Howell Deneen C | Director | Grant | 3K | $0.00 | $0 | 29K |
| 2026-03-31 | de Sa Paul | Director | Grant | 3K | $0.00 | $0 | 30K |
| 2026-03-31 | Kennedy Sheryl Lynn | Director | Grant | 3K | $0.00 | $0 | 14K |
| 2026-03-31 | Montagner Marc | Director | Grant | 3K | $0.00 | $0 | 96K |
| 2026-03-31 | FERGUSON Lewis H | Director | Grant | 3K | $0.00 | $0 | 24K |
| 2026-03-31 | BROOKS STEVEN D | Director | Grant | 3K | $0.00 | $0 | 55K |
| 2026-03-06 | KILMER HENRY W | VP OF NETWORK STRATEGY | Sell | 2K | $23.35 | $56K | 41K |
| 2026-03-05 | Kennedy Sheryl Lynn | Director | Sell | 3K | $22.99 | $76K | 10K |
| 2026-03-05 | FERGUSON Lewis H | Director | Sell | 2K | $23.03 | $51K | 20K |
| 2026-03-05 | WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Sell | 5K | $22.63 | $110K | 203K |
| 2025-12-31 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Gift | 230K | $0.00 | $0 | 230K |
| 2025-12-31 | Harris Mark Andrew | VP & Chief Revenue Officer | Grant | 100K | $0.00 | $0 | 110K |
| 2025-12-31 | Harris Mark Andrew | VP & Chief Revenue Officer | Grant | 5K | $0.00 | $0 | 10K |
| 2025-12-31 | Howard Eve N | Director | Grant | 3K | $0.00 | $0 | 20K |
| 2025-12-31 | Howell Deneen C | Director | Grant | 3K | $0.00 | $0 | 25K |
| 2025-12-31 | de Sa Paul | Director | Grant | 3K | $0.00 | $0 | 27K |
| 2025-12-31 | Kennedy Sheryl Lynn | Director | Grant | 3K | $0.00 | $0 | 13K |
| 2025-12-31 | Chang John B. | VP & CHIEF LEGAL OFFICER | Grant | 100K | $0.00 | $0 | 189K |
| 2025-12-31 | Chang John B. | VP & CHIEF LEGAL OFFICER | Grant | 10K | $0.00 | $0 | 89K |
| 2025-12-31 | KILMER HENRY W | VP OF NETWORK STRATEGY | Grant | 10K | $0.00 | $0 | 43K |
| 2025-12-31 | Montagner Marc | Director | Grant | 3K | $0.00 | $0 | 93K |
| 2025-12-31 | FERGUSON Lewis H | Director | Grant | 3K | $0.00 | $0 | 23K |
| 2025-12-31 | WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Grant | 100K | $0.00 | $0 | 208K |
| 2025-12-31 | WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Grant | 19K | $0.00 | $0 | 108K |
| 2025-12-31 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Gift | 230K | $0.00 | $0 | 697K |
| 2025-12-31 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Grant | 230K | $0.00 | $0 | 927K |
| 2025-12-31 | BROOKS STEVEN D | Director | Grant | 3K | $0.00 | $0 | 52K |
| 2025-12-11 | WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Sell | 7K | $23.99 | $175K | 88K |
| 2025-12-08 | KILMER HENRY W | VP OF NETWORK STRATEGY | Sell | 5K | $19.79 | $95K | 34K |
| 2025-12-02 | FERGUSON Lewis H | Director | Sell | 4K | $20.34 | $81K | 19K |
| 2025-12-01 | Chang John B. | VP & CHIEF LEGAL OFFICER | Grant | 2K | $0.00 | $0 | 79K |
| 2025-12-01 | KILMER HENRY W | VP OF NETWORK STRATEGY | Sell | 2K | $0.00 | $0 | 39K |
| 2025-12-01 | WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Grant | 2K | $0.00 | $0 | 96K |
| 2025-11-11 | Kennedy Sheryl Lynn | Director | Sell | 2K | $21.34 | $51K | 10K |
| 2025-09-30 | Howard Eve N | Director | Grant | 2K | $0.00 | $0 | 17K |
| 2025-09-30 | Howell Deneen C | Director | Grant | 2K | $0.00 | $0 | 22K |
| 2025-09-30 | Kennedy Sheryl Lynn | Director | Grant | 2K | $0.00 | $0 | 12K |
| 2025-09-30 | Montagner Marc | Director | Grant | 2K | $0.00 | $0 | 90K |
| 2025-09-30 | BROOKS STEVEN D | Director | Grant | 2K | $0.00 | $0 | 48K |
| 2025-09-30 | de Sa Paul | Director | Grant | 2K | $0.00 | $0 | 24K |
| 2025-09-30 | FERGUSON Lewis H | Director | Grant | 2K | $0.00 | $0 | 23K |
| 2025-09-05 | KILMER HENRY W | VP OF NETWORK STRATEGY | Sell | 2K | $36.99 | $89K | 36K |
| 2025-09-02 | WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Sell | 5K | $36.98 | $181K | 93K |
| 2025-09-02 | Harris Mark Andrew | VP & Chief Revenue Officer | Grant | 668 | $0.00 | $0 | 5K |
| 2025-08-21 | Kennedy Sheryl Lynn | Director | Sell | 2K | $36.35 | $73K | 10K |
| 2025-08-08 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 819K | $27.50 | $22.5M | 697K |
| 2025-08-07 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 1.8M | $32.60 | $60.0M | 1.5M |
| 2025-06-30 | Howard Eve N | Director | Grant | 2K | $0.00 | $0 | 15K |
| 2025-06-30 | Montagner Marc | Director | Grant | 2K | $0.00 | $0 | 87K |
| 2025-06-30 | Kennedy Sheryl Lynn | Director | Grant | 2K | $0.00 | $0 | 12K |
| 2025-06-30 | Howell Deneen C | Director | Grant | 2K | $0.00 | $0 | 20K |
| 2025-06-30 | FERGUSON Lewis H | Director | Grant | 2K | $0.00 | $0 | 21K |
| 2025-06-30 | de Sa Paul | Director | Grant | 2K | $0.00 | $0 | 21K |
| 2025-06-30 | BROOKS STEVEN D | Director | Grant | 2K | $0.00 | $0 | 46K |
| 2025-06-16 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 25K | $47.05 | $1.2M | 3.4M |
| 2025-06-16 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 45K | $47.14 | $2.1M | 3.4M |
| 2025-06-13 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 10K | $47.34 | $473K | 3.4M |
| 2025-06-13 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 45K | $47.42 | $2.1M | 3.4M |
| 2025-06-12 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 10K | $47.83 | $478K | 3.5M |
| 2025-06-12 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 45K | $47.87 | $2.2M | 3.5M |
| 2025-06-11 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 10K | $48.35 | $484K | 3.5M |
| 2025-06-11 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 45K | $48.55 | $2.2M | 3.5M |
| 2025-06-10 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 40K | $48.70 | $1.9M | 3.6M |
| 2025-06-10 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 15K | $48.63 | $729K | 3.6M |
| 2025-06-09 | WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Sell | 5K | $48.04 | $235K | 98K |
| 2025-06-09 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 15K | $48.99 | $735K | 3.6M |
| 2025-06-09 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 40K | $48.51 | $1.9M | 3.7M |
| 2025-06-06 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 30K | $47.78 | $1.4M | 3.7M |
| 2025-06-06 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 50K | $47.78 | $2.4M | 3.7M |
| 2025-06-06 | KILMER HENRY W | VP OF NETWORK STRATEGY | Sell | 2K | $47.95 | $115K | 39K |
| 2025-06-05 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 35K | $47.31 | $1.7M | 3.8M |
| 2025-06-05 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 40K | $47.29 | $1.9M | 3.8M |
| 2025-06-04 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Sell | 50K | $47.76 | $2.4M | 3.9M |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON13 Form 144 notices on file for CCOI worth $971K at the prices reported; 1 in the last 90 days worth $45K. Latest: THADDEUS WEED filed on 2026-09-02 to sell 4,850 shares ($45K) from 2026-09-02.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-09-02 | THADDEUS WEEDOfficer | 5K | $45K | 0.009% | 2026-09-02 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-16 | THADDEUS WEEDOfficer | 5K | $81K | 0.010% | 2026-06-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-09 | KILMER HENRY WOfficer | 2K | $42K | 0.005% | 2026-06-09 | Charles Schwab Corp. |
| 2026-05-28 | Lewis H FERGUSONDirector | 3K | $57K | 0.006% | 2026-05-28 | Benjamin F. Edwards & Co |
| 2026-05-18 | Sheryl Lynn KennedyDirector | 3K | $53K | 0.007% | 2026-05-14 | RBC DOMINION SECURITIES INC. |
| 2026-03-05 | THADDEUS WEEDOfficer | 5K | $110K | 0.010% | 2026-03-05 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-05 | KILMER HENRY WOfficer | 2K | $55K | 0.005% | 2026-03-05 | Charles Schwab Corp. |
| 2026-03-05 | Sheryl Lynn KennedyDirector | 3K | $76K | 0.007% | 2026-03-05 | RBC DOMINION SECURITIES INC. |
| 2026-03-05 | Lewis H FERGUSONDirector | 2K | $51K | 0.004% | 2026-03-05 | RBC WEALTH MANAGEMENT |
| 2025-12-11 | THADDEUS WEEDOfficer | 7K | $175K | 0.015% | 2025-12-11 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-03 | KILMER HENRY WOfficer | 5K | $96K | 0.010% | 2025-12-03 | Charles Schwab & Co |
| 2025-12-01 | Lewis H FERGUSONDirector | 4K | $78K | 0.008% | 2025-12-01 | RBC WEALTH MANAGEMENT |
| 2025-11-12 | Sheryl Lynn KennedyDirector | 2K | $51K | 0.005% | 2025-11-11 | RBC DOMINION SECURITIES INC. |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON6 holders report 5% or more of CCOI in their latest filing, all on Schedule 13G (passive). The largest reported stake is Turtle Creek Asset Management Inc. at 8.2% of the class (4,036,847 shares), filed 2026-02-17 for an event on 2025-12-31.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-10-05 | 13G/Ano. 18 | BlackRock, Inc.parent holding company | 3.9M | 7.7% | 2026-09-30 |
| 2026-08-07 | 13G | STATE STREET CORPORATIONparent holding company | 2.8M | 5.5% | 2026-06-30 |
| 2026-07-31 | 13G/Ano. 1 | Vanguard Portfolio Managementinvestment adviser | 2.4M | 4.8% | 2026-06-30 |
| 2026-06-17 | 13G/Ano. 1 | Peter S. Parkindividual | 2.8M | 5.6% | 2026-06-10 |
| 2026-06-17 | 13G/Ano. 1 | Park West Asset Management LLCinvestment adviser | 2.8M | 5.6% | 2026-06-10 |
| 2026-06-17 | 13G/Ano. 1 | Park West Investors Master Fund, Limitedcorporation | 2.5M | 5.0% | 2026-06-10 |
| 2026-03-26 | 13G/Ano. 17 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-02-17 | 13G/Ano. 2 | Turtle Creek Asset Management Inc.non-US institution | 4.0M | 8.2% | 2025-12-31 |
13F holders
Tracked managers holding CCOI at their latest 13F. JSON6 of the 30 tracked managers held CCOI at their latest 13F, $31.3M in total at quarter-end prices. Citadel Advisors is the largest at $16.3M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 3 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Citadel Advisors | 2026-06-30 | 1.2M | $16.3M | 0.00% | +746K |
| AQR Capital Management | 2026-06-30 | 616K | $8.5M | 0.00% | +406K |
| D. E. Shaw & Co. | 2026-06-30 | 285K | $4.0M | 0.00% | -454K |
| Millennium Management | 2026-06-30 | 119K | $1.7M | 0.00% | -109K |
| Renaissance Technologies | 2026-06-30 | 49K | $683K | 0.00% | -18K |
| Two Sigma Investments | 2026-06-30 | 12K | $163K | 0.00% | new |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
Financials
SEC XBRL, as filed. JSONIn FY 2025 it generated -$10.6M of operating cash flow and spent $16.7M on buybacks and $150.1M on dividends.
- Cash
- $183.7M
- Equity
- -$34.1M
- Total assets
- $3.10B
- Shares outstanding
- 51,215,736
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q2 FY 2026 | 2026-06-30 | n/a | $66.6M | n/a | 1.38 |
| Q1 FY 2026 | 2026-03-31 | n/a | -$39.5M | n/a | -0.83 |
| Q4 FY 2025derived | 2025-12-31 | n/a | -$30.8M | n/a | n/a |
| Q3 FY 2025 | 2025-09-30 | n/a | -$41.5M | n/a | -0.87 |
| Q2 FY 2025 | 2025-06-30 | n/a | -$57.8M | n/a | -1.21 |
| Q1 FY 2025 | 2025-03-31 | n/a | -$52.0M | n/a | -1.09 |
| Q4 FY 2024derived | 2024-12-31 | n/a | n/a | n/a | n/a |
| Q3 FY 2024 | 2024-09-30 | n/a | -$63.1M | n/a | -1.33 |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2025 | 2025-12-31 | n/a | -$182.2M | -$10.6M | $187.6M | $16.7M | $150.1M |
| FY 2024 | 2024-12-31 | n/a | -$204.1M | -$8.6M | $195.0M | $8.0M | $189.4M |
| FY 2023 | 2023-12-31 | n/a | $1.27B | $17.3M | $129.6M | n/a | $181.7M |
| FY 2022 | 2022-12-31 | n/a | n/a | $173.7M | $79.0M | n/a | $169.9M |
| FY 2021 | 2021-12-31 | n/a | n/a | $170.3M | $69.9M | n/a | $150.3M |
Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-07-31 from the cover page.
What this page is
Cogent Communications Holdings in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Cogent Communications Holdings (CCOI), SEC CIK 1158324, listed on Nasdaq, classified by the SEC as communications services, nec. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-28.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-21.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-09-02.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-10-05.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Financials
- SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-06.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-09-30.JSON and CSV
- Company record
- EDGAR filing index for CIK 1158324Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
Other companies the SEC classifies as communications services, nec
Other company pages
Datasets
Frequently Asked Questions
How much of CCOI is sold short?
7,108,242 shares were held short at the 2026-10-15 settlement, 3.8 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is CCOI's daily short volume?
On 2026-10-28, 332,956 of the 545,292 CCOI shares reported to FINRA were sold short, 61.1% of the day's reported volume. Short volume is a flow for one day, not a position.
Does CCOI have fails to deliver?
The SEC's latest file shows 65,964 CCOI shares failed to deliver at settlement 2026-09-21. Fails are reported per settlement date and published twice a month with a lag.
Are CCOI insiders buying or selling?
Insiders at CCOI reported 2 open-market sells worth $68K in the last 90 days and no open-market buys. Latest filing: Montagner Marc (Director) on 2026-09-30.
Have CCOI insiders filed to sell?
13 Form 144 notices on file for CCOI worth $971K at the prices reported; 1 in the last 90 days worth $45K. Latest: THADDEUS WEED filed on 2026-09-02 to sell 4,850 shares ($45K) from 2026-09-02.
Who owns 5% or more of CCOI?
6 holders report 5% or more of CCOI in their latest filing, all on Schedule 13G (passive). The largest reported stake is Turtle Creek Asset Management Inc. at 8.2% of the class (4,036,847 shares), filed 2026-02-17 for an event on 2025-12-31.
What did CCOI report last quarter?
In FY 2025 it generated -$10.6M of operating cash flow and spent $16.7M on buybacks and $150.1M on dividends.
Which tracked 13F managers own CCOI?
6 of the 30 tracked 13F managers held CCOI shares at their latest filing, $31.3M in all. The largest: Ken Griffin's Citadel Advisors (1.2M shares, $16.3M), Cliff Asness's AQR Capital Management (616K shares, $8.5M), D. E. Shaw & Co. (285K shares, $4.0M), Izzy Englander's Millennium Management (119K shares, $1.7M), Renaissance Technologies (49K shares, $683K), Two Sigma Investments (12K shares, $163K).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.