COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI)
Every FINRA and SEC series the site collects for COGENT COMMUNICATIONS HOLDINGS, INC.: short interest with days to cover, daily short sale volume, fails to deliver and Form 4 insider trades. Listed on Nasdaq, classified by the SEC as communications services, nec.
6.7M
Short interest
settlement 2026-08-14
3.1
Days to cover
-3.0% vs prior
54.1%
Short share of volume
2026-09-11
640
Fails to deliver
settlement 2026-08-12
-$45K
Insider flow, 90 days
0 buys, 1 sells
As of 2026-09-11.
Short interest
FINRA, twice a month; the last 12 months shown, all 48 settlements in the JSONAs of 14 August 2026, short interest in CCOI is 6,747,898 shares, down 188,811 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). At the reported average volume of 2.1M shares a day that is 3.1 days to cover.
Embed this chartfree, with the attribution line it carries
<iframe src="https://xoomar.com/embed/stocks/ccoi" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 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 |
Daily short volume
FINRA Reg SHO, last 60 sessions. JSONAs of 11 September 2026, the short share of CCOI volume is 54.1%, down 3.2 points over the last five sessions. Over the last 52 readings it ranged from 41.6% (30 June 2026) to 74.6% (18 August 2026). The latest reading is 3.3 points below the 30-session average of 57.4%, on 814K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-09-11 | 440K | 814K | 54.1% | 0 |
| 2026-09-10 | 539K | 984K | 54.8% | 0 |
| 2026-09-09 | 707K | 1.0M | 69.5% | 0 |
| 2026-09-08 | 760K | 1.1M | 66.4% | 0 |
| 2026-09-04 | 289K | 532K | 54.4% | 0 |
| 2026-09-03 | 472K | 825K | 57.2% | 156 |
| 2026-09-02 | 545K | 1.1M | 50.0% | 112 |
| 2026-09-01 | 394K | 660K | 59.6% | 0 |
| 2026-08-31 | 330K | 561K | 58.8% | 0 |
| 2026-08-28 | 242K | 403K | 60.2% | 0 |
| 2026-08-27 | 332K | 557K | 59.5% | 0 |
| 2026-08-26 | 198K | 318K | 62.4% | 0 |
| 2026-08-25 | 261K | 477K | 54.6% | 9 |
| 2026-08-24 | 585K | 1.1M | 52.0% | 1,028 |
| 2026-08-21 | 459K | 802K | 57.2% | 8,116 |
| 2026-08-20 | 412K | 694K | 59.3% | 16,085 |
| 2026-08-19 | 594K | 978K | 60.8% | 17,371 |
| 2026-08-18 | 583K | 781K | 74.6% | 0 |
| 2026-08-17 | 312K | 506K | 61.7% | 0 |
| 2026-08-14 | 566K | 972K | 58.2% | 294 |
| 2026-08-13 | 468K | 945K | 49.5% | 1,900 |
| 2026-08-12 | 364K | 573K | 63.5% | 0 |
| 2026-08-11 | 458K | 734K | 62.4% | 0 |
| 2026-08-10 | 405K | 960K | 42.2% | 30,191 |
| 2026-08-07 | 728K | 1.7M | 43.2% | 83,086 |
| 2026-08-06 | 772K | 1.3M | 58.9% | 24,391 |
| 2026-08-05 | 278K | 548K | 50.7% | 2,853 |
| 2026-08-04 | 190K | 394K | 48.2% | 0 |
| 2026-08-03 | 276K | 518K | 53.3% | 0 |
| 2026-07-31 | 211K | 326K | 64.7% | 0 |
Fails to deliver
SEC, by settlement date. JSONAs of 12 August 2026, the fails-to-deliver balance in CCOI is 640 shares, down 14,384 shares over the last settlement date. Over the last 40 readings it ranged from 13 shares (24 September 2025) to 81,135 shares (1 July 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 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 |
| 2026-04-20 | 1,500 | $23.63 | $35K |
| 2026-04-08 | 1,298 | $20.16 | $26K |
| 2026-03-24 | 9,503 | $18.85 | $179K |
| 2026-03-23 | 10,015 | $18.05 | $181K |
| 2026-03-11 | 14,871 | $22.01 | $327K |
| 2026-03-10 | 173 | $22.50 | $4K |
| 2026-03-06 | 17,184 | $22.77 | $391K |
| 2026-03-05 | 64,235 | $23.09 | $1.5M |
| 2026-03-04 | 16,740 | $21.63 | $362K |
| 2026-03-03 | 29,464 | $22.19 | $654K |
| 2026-02-27 | 2,224 | $18.55 | $41K |
| 2026-02-25 | 73,485 | $18.94 | $1.4M |
| 2026-02-12 | 11,414 | $26.51 | $303K |
| 2026-02-06 | 451 | $22.55 | $10K |
| 2026-02-04 | 629 | $24.25 | $15K |
| 2026-01-20 | 300 | $23.85 | $7K |
| 2026-01-15 | 5,749 | $23.44 | $135K |
| 2025-12-16 | 34,531 | $22.84 | $789K |
| 2025-12-12 | 26,052 | $24.33 | $634K |
| 2025-12-10 | 3,795 | $21.44 | $81K |
| 2025-12-09 | 18,450 | $21.19 | $391K |
| 2025-12-03 | 2,373 | $19.99 | $47K |
Insider trades
SEC Form 4, newest first, 50 of 73 shown. JSONInsiders at CCOI reported 1 open-market sell worth $45K in the last 90 days and no open-market buys. Sells alone are a weak signal; insiders sell for tax, diversification and estate reasons all the time. Latest filing: WEED THADDEUS GERARD (VICE PRESIDENT, CFO) on 2026-09-02.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-09-02 | WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Sell | 5K | $9.37 | $45K | 193K |
| 2026-06-30 | BROOKS STEVEN D | n/a | Grant | 3K | $0.00 | $0 | 59K |
| 2026-06-30 | Kennedy Sheryl Lynn | n/a | Grant | 3K | $0.00 | $0 | 14K |
| 2026-06-30 | Montagner Marc | n/a | Grant | 3K | $0.00 | $0 | 100K |
| 2026-06-30 | FERGUSON Lewis H | n/a | Grant | 3K | $0.00 | $0 | 25K |
| 2026-05-28 | FERGUSON Lewis H | n/a | Sell | 3K | $20.36 | $57K | 21K |
| 2026-05-14 | Kennedy Sheryl Lynn | n/a | Sell | 3K | $16.22 | $54K | 10K |
| 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 | 609K |
| 2026-04-01 | SCHAEFFER DAVE | CHAIRMAN, CEO, AND PRESIDENT | Disposition | 59K | $0.00 | $0 | 638K |
| 2026-03-31 | Howard Eve N | n/a | Grant | 3K | $0.00 | $0 | 24K |
| 2026-03-31 | Howell Deneen C | n/a | Grant | 3K | $0.00 | $0 | 29K |
| 2026-03-31 | de Sa Paul | n/a | Grant | 3K | $0.00 | $0 | 30K |
| 2026-03-31 | Kennedy Sheryl Lynn | n/a | Grant | 3K | $0.00 | $0 | 14K |
| 2026-03-31 | Montagner Marc | n/a | Grant | 3K | $0.00 | $0 | 96K |
| 2026-03-31 | FERGUSON Lewis H | n/a | Grant | 3K | $0.00 | $0 | 24K |
| 2026-03-31 | BROOKS STEVEN D | n/a | 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 | n/a | Sell | 3K | $22.99 | $76K | 10K |
| 2026-03-05 | FERGUSON Lewis H | n/a | Sell | 2K | $23.03 | $51K | 20K |
| 2026-03-05 | WEED THADDEUS GERARD | VICE PRESIDENT, CFO | Sell | 5K | $22.63 | $110K | 203K |
| 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 | n/a | Grant | 3K | $0.00 | $0 | 20K |
| 2025-12-31 | Howell Deneen C | n/a | Grant | 3K | $0.00 | $0 | 25K |
| 2025-12-31 | de Sa Paul | n/a | Grant | 3K | $0.00 | $0 | 27K |
| 2025-12-31 | Kennedy Sheryl Lynn | n/a | 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 | n/a | Grant | 3K | $0.00 | $0 | 93K |
| 2025-12-31 | FERGUSON Lewis H | n/a | 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 | n/a | 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 | n/a | 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 | n/a | Sell | 2K | $21.34 | $51K | 10K |
| 2025-09-30 | Howard Eve N | n/a | Grant | 2K | $0.00 | $0 | 17K |
| 2025-09-30 | Howell Deneen C | n/a | Grant | 2K | $0.00 | $0 | 22K |
| 2025-09-30 | Kennedy Sheryl Lynn | n/a | Grant | 2K | $0.00 | $0 | 12K |
| 2025-09-30 | Montagner Marc | n/a | Grant | 2K | $0.00 | $0 | 90K |
| 2025-09-30 | BROOKS STEVEN D | n/a | Grant | 2K | $0.00 | $0 | 48K |
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 the rarer, stronger signal.
Planned sales (Form 144)
Newest first. JSON1 Form 144 notice on file for CCOI worth $45K 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 |
Large holders (13D and 13G)
One row per reporting person, newest filing first. JSON2 holders above 5% have filed on CCOI, all on Schedule 13G (passive). The largest reported stake is STATE STREET CORPORATION at 5.5% of the class (2,779,396 shares), filed 2026-08-07 for an event on 2026-06-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 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 |
13F holders
Tracked managers holding CCOI at their latest 13F. JSON7 of the 30 tracked managers held CCOI at their latest 13F, $38.1M in total at quarter-end prices. Citadel Advisors is the largest at $22.6M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 3 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Citadel Advisors | 2026-06-30 | 1.6M | $22.6M | 0.00% | +550K |
| AQR Capital Management | 2026-06-30 | 616K | $8.5M | 0.00% | +406K |
| D. E. Shaw & Co. | 2026-06-30 | 285K | $4.0M | 0.00% | -494K |
| Millennium Management | 2026-06-30 | 119K | $1.7M | 0.00% | new or n/a |
| Renaissance Technologies | 2026-06-30 | 49K | $683K | 0.00% | -18K |
| Point72 Asset Management | 2026-06-30 | 29K | $405K | 0.00% | -119K |
| Two Sigma Investments | 2026-06-30 | 22K | $305K | 0.00% | new or n/a |
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 2026 | 2026-06-30 | n/a | $66.6M | n/a | 1.38 |
| Q1 2026 | 2026-03-31 | n/a | -$39.5M | n/a | -0.83 |
| Q4 2025derived | 2025-12-31 | n/a | -$30.8M | n/a | n/a |
| Q3 2025 | 2025-09-30 | n/a | -$41.5M | n/a | -0.87 |
| Q2 2025 | 2025-06-30 | n/a | -$57.8M | n/a | -1.21 |
| Q1 2025 | 2025-03-31 | n/a | -$52.0M | n/a | -1.09 |
| Q4 2024derived | 2024-12-31 | n/a | n/a | n/a | n/a |
| Q3 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 cash paid to repurchase common stock in the year (XBRL PaymentsForRepurchaseOfCommonStock), not authorizations. 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, INC. 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 pulls every series the site collects for one ticker onto one URL, keyed by the SEC's own ticker list, 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 summary sentence built from the rows (last value, change, range with dates) and its own JSON and CSV links. Nothing on the page is written by a model; the sentences change only when the data does. A page exists only for companies with data in at least two series, and every section says when its source last updated.
This page follows COGENT COMMUNICATIONS HOLDINGS, INC. (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 method
- Short interest
- FINRA consolidated short interestTwice a month, about eight business days after settlement. Latest 2026-08-14.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesEvery trading day, loaded the following morning. Latest 2026-09-11.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataTwice a month, a few weeks after the half month ends. Latest 2026-08-12.JSON and CSV
- Planned sales
- SEC EDGAR Form 144EDGAR read every 30 minutes; a notice is filed on or before the sell order. Latest 2026-09-02.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GEDGAR read every 30 minutes; 13D within five business days of crossing 5%, 13G on the passive schedule. Latest 2026-08-07.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRQuarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Financials
- SEC XBRL company factsRefreshed weekly from the SEC's structured data; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
- Insider trades
- SEC EDGAR Form 4EDGAR read every 30 minutes; filings are due two business days after the trade. Latest 2026-09-02.JSON and CSV
- Company record
- EDGAR filing index for CIK 1158324Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 30 requests a minute without a key, 120 a minute with a key from a free account.
Data checks. Every dataset is checked against its source once a day. This dataset passed the last run, 13 Sep 05:40 UTC.
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 crowded short are the combination that has historically preceded squeezes; insider sells next to a crowded short 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.
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Datasets
Frequently Asked Questions
How much of CCOI is sold short?
What is CCOI's daily short volume?
Does CCOI have fails to deliver?
Are CCOI insiders buying or selling?
Have CCOI insiders filed to sell?
Who owns more than 5% of CCOI?
What did CCOI report last quarter?
Which funds hold CCOI?
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.