XOOMAR

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.

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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 JSON

As 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.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-08-146,747,898-3.0%2,139,4843.15
2026-07-316,954,163+0.3%1,090,5216.38
2026-07-156,936,709-2.4%1,231,5175.63
2026-06-307,109,316+22.4%1,684,3324.22
2026-06-155,808,070-4.0%924,8846.28
2026-05-296,048,557+15.7%1,273,2944.75
2026-05-155,230,217-1.3%1,981,5052.64
2026-04-305,297,480-7.9%832,1456.37
2026-04-155,750,362-1.6%862,6986.67
2026-03-315,842,448-12.4%1,221,1854.78
2026-03-136,673,628-10.1%1,171,0625.70
2026-02-277,419,016+22.1%2,019,1243.67
2026-02-136,074,190+10.2%974,0276.24
2026-01-305,511,079-7.4%666,5348.27
2026-01-155,951,263-8.3%902,6076.59
2025-12-316,486,402+11.5%1,457,6674.45
2025-12-155,818,148-9.2%1,350,0244.31
2025-11-286,404,577-4.1%1,979,8683.23
2025-11-146,676,850-6.5%2,748,9942.43
2025-10-317,140,690+12.3%992,4747.19
2025-10-156,361,292+4.2%1,038,6046.12
2025-09-306,103,736+0.7%1,521,9804.01
2025-09-156,061,638+11.2%1,651,8543.67
2025-08-295,450,913-1.6%1,581,4443.45

Daily short volume

FINRA Reg SHO, last 60 sessions. JSON

As 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.

DateShort volumeTotal volumeShort shareExempt
2026-09-11440K814K54.1%0
2026-09-10539K984K54.8%0
2026-09-09707K1.0M69.5%0
2026-09-08760K1.1M66.4%0
2026-09-04289K532K54.4%0
2026-09-03472K825K57.2%156
2026-09-02545K1.1M50.0%112
2026-09-01394K660K59.6%0
2026-08-31330K561K58.8%0
2026-08-28242K403K60.2%0
2026-08-27332K557K59.5%0
2026-08-26198K318K62.4%0
2026-08-25261K477K54.6%9
2026-08-24585K1.1M52.0%1,028
2026-08-21459K802K57.2%8,116
2026-08-20412K694K59.3%16,085
2026-08-19594K978K60.8%17,371
2026-08-18583K781K74.6%0
2026-08-17312K506K61.7%0
2026-08-14566K972K58.2%294
2026-08-13468K945K49.5%1,900
2026-08-12364K573K63.5%0
2026-08-11458K734K62.4%0
2026-08-10405K960K42.2%30,191
2026-08-07728K1.7M43.2%83,086
2026-08-06772K1.3M58.9%24,391
2026-08-05278K548K50.7%2,853
2026-08-04190K394K48.2%0
2026-08-03276K518K53.3%0
2026-07-31211K326K64.7%0

Fails to deliver

SEC, by settlement date. JSON

As 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.

SettlementShares failedPriceValue
2026-08-12640$10.82$7K
2026-08-1015,024$9.92$149K
2026-08-0752,705$10.91$575K
2026-07-0181,135$13.88$1.1M
2026-06-303,946$13.14$52K
2026-06-2980,701$13.41$1.1M
2026-06-03339$17.40$6K
2026-06-01133$17.76$2K
2026-04-201,500$23.63$35K
2026-04-081,298$20.16$26K
2026-03-249,503$18.85$179K
2026-03-2310,015$18.05$181K
2026-03-1114,871$22.01$327K
2026-03-10173$22.50$4K
2026-03-0617,184$22.77$391K
2026-03-0564,235$23.09$1.5M
2026-03-0416,740$21.63$362K
2026-03-0329,464$22.19$654K
2026-02-272,224$18.55$41K
2026-02-2573,485$18.94$1.4M
2026-02-1211,414$26.51$303K
2026-02-06451$22.55$10K
2026-02-04629$24.25$15K
2026-01-20300$23.85$7K
2026-01-155,749$23.44$135K
2025-12-1634,531$22.84$789K
2025-12-1226,052$24.33$634K
2025-12-103,795$21.44$81K
2025-12-0918,450$21.19$391K
2025-12-032,373$19.99$47K

Insider trades

SEC Form 4, newest first, 50 of 73 shown. JSON

Insiders 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.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-09-02WEED THADDEUS GERARDVICE PRESIDENT, CFOSell5K$9.37$45K193K
2026-06-30BROOKS STEVEN Dn/aGrant3K$0.00$059K
2026-06-30Kennedy Sheryl Lynnn/aGrant3K$0.00$014K
2026-06-30Montagner Marcn/aGrant3K$0.00$0100K
2026-06-30FERGUSON Lewis Hn/aGrant3K$0.00$025K
2026-05-28FERGUSON Lewis Hn/aSell3K$20.36$57K21K
2026-05-14Kennedy Sheryl Lynnn/aSell3K$16.22$54K10K
2026-05-04SCHAEFFER DAVECHAIRMAN, CEO, AND PRESIDENTGift1.0M$0.00$0609K
2026-05-04SCHAEFFER DAVECHAIRMAN, CEO, AND PRESIDENTGrant1.0M$0.00$01.6M
2026-04-01SCHAEFFER DAVECHAIRMAN, CEO, AND PRESIDENTGift29K$0.00$0609K
2026-04-01SCHAEFFER DAVECHAIRMAN, CEO, AND PRESIDENTDisposition59K$0.00$0638K
2026-03-31Howard Eve Nn/aGrant3K$0.00$024K
2026-03-31Howell Deneen Cn/aGrant3K$0.00$029K
2026-03-31de Sa Pauln/aGrant3K$0.00$030K
2026-03-31Kennedy Sheryl Lynnn/aGrant3K$0.00$014K
2026-03-31Montagner Marcn/aGrant3K$0.00$096K
2026-03-31FERGUSON Lewis Hn/aGrant3K$0.00$024K
2026-03-31BROOKS STEVEN Dn/aGrant3K$0.00$055K
2026-03-06KILMER HENRY WVP OF NETWORK STRATEGYSell2K$23.35$56K41K
2026-03-05Kennedy Sheryl Lynnn/aSell3K$22.99$76K10K
2026-03-05FERGUSON Lewis Hn/aSell2K$23.03$51K20K
2026-03-05WEED THADDEUS GERARDVICE PRESIDENT, CFOSell5K$22.63$110K203K
2025-12-31Harris Mark AndrewVP &amp; Chief Revenue OfficerGrant100K$0.00$0110K
2025-12-31Harris Mark AndrewVP &amp; Chief Revenue OfficerGrant5K$0.00$010K
2025-12-31Howard Eve Nn/aGrant3K$0.00$020K
2025-12-31Howell Deneen Cn/aGrant3K$0.00$025K
2025-12-31de Sa Pauln/aGrant3K$0.00$027K
2025-12-31Kennedy Sheryl Lynnn/aGrant3K$0.00$013K
2025-12-31Chang John B.VP &amp; CHIEF LEGAL OFFICERGrant100K$0.00$0189K
2025-12-31Chang John B.VP &amp; CHIEF LEGAL OFFICERGrant10K$0.00$089K
2025-12-31KILMER HENRY WVP OF NETWORK STRATEGYGrant10K$0.00$043K
2025-12-31Montagner Marcn/aGrant3K$0.00$093K
2025-12-31FERGUSON Lewis Hn/aGrant3K$0.00$023K
2025-12-31WEED THADDEUS GERARDVICE PRESIDENT, CFOGrant100K$0.00$0208K
2025-12-31WEED THADDEUS GERARDVICE PRESIDENT, CFOGrant19K$0.00$0108K
2025-12-31SCHAEFFER DAVECHAIRMAN, CEO, AND PRESIDENTGift230K$0.00$0697K
2025-12-31SCHAEFFER DAVECHAIRMAN, CEO, AND PRESIDENTGrant230K$0.00$0927K
2025-12-31BROOKS STEVEN Dn/aGrant3K$0.00$052K
2025-12-11WEED THADDEUS GERARDVICE PRESIDENT, CFOSell7K$23.99$175K88K
2025-12-08KILMER HENRY WVP OF NETWORK STRATEGYSell5K$19.79$95K34K
2025-12-02FERGUSON Lewis Hn/aSell4K$20.34$81K19K
2025-12-01Chang John B.VP &amp; CHIEF LEGAL OFFICERGrant2K$0.00$079K
2025-12-01KILMER HENRY WVP OF NETWORK STRATEGYSell2K$0.00$039K
2025-12-01WEED THADDEUS GERARDVICE PRESIDENT, CFOGrant2K$0.00$096K
2025-11-11Kennedy Sheryl Lynnn/aSell2K$21.34$51K10K
2025-09-30Howard Eve Nn/aGrant2K$0.00$017K
2025-09-30Howell Deneen Cn/aGrant2K$0.00$022K
2025-09-30Kennedy Sheryl Lynnn/aGrant2K$0.00$012K
2025-09-30Montagner Marcn/aGrant2K$0.00$090K
2025-09-30BROOKS STEVEN Dn/aGrant2K$0.00$048K

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. JSON

1 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.

FiledSellerSharesMarket valueOf outstandingSale fromBroker
2026-09-02THADDEUS WEEDOfficer5K$45K0.009%2026-09-02Morgan Stanley Smith Barney LLC Executive Financial Services

Large holders (13D and 13G)

One row per reporting person, newest filing first. JSON

2 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.

FiledFormHolderSharesOf classEvent
2026-08-0713GSTATE STREET CORPORATIONparent holding company2.8M5.5%2026-06-30
2026-07-3113G/Ano. 1Vanguard Portfolio Managementinvestment adviser2.4M4.8%2026-06-30

13F holders

Tracked managers holding CCOI at their latest 13F. JSON

7 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.

FundQuarterSharesValueOf portfolioChange in shares
Citadel Advisors2026-06-301.6M$22.6M0.00%+550K
AQR Capital Management2026-06-30616K$8.5M0.00%+406K
D. E. Shaw & Co.2026-06-30285K$4.0M0.00%-494K
Millennium Management2026-06-30119K$1.7M0.00%new or n/a
Renaissance Technologies2026-06-3049K$683K0.00%-18K
Point72 Asset Management2026-06-3029K$405K0.00%-119K
Two Sigma Investments2026-06-3022K$305K0.00%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. JSON

In 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

QuarterPeriod endRevenueNet incomeMarginDiluted EPS
Q2 20262026-06-30n/a$66.6Mn/a1.38
Q1 20262026-03-31n/a-$39.5Mn/a-0.83
Q4 2025derived2025-12-31n/a-$30.8Mn/an/a
Q3 20252025-09-30n/a-$41.5Mn/a-0.87
Q2 20252025-06-30n/a-$57.8Mn/a-1.21
Q1 20252025-03-31n/a-$52.0Mn/a-1.09
Q4 2024derived2024-12-31n/an/an/an/a
Q3 20242024-09-30n/a-$63.1Mn/a-1.33

Fiscal years, with buybacks and dividends

Fiscal yearEndsRevenueNet incomeOperating cash flowCapexBuybacksDividends
FY 20252025-12-31n/a-$182.2M-$10.6M$187.6M$16.7M$150.1M
FY 20242024-12-31n/a-$204.1M-$8.6M$195.0M$8.0M$189.4M
FY 20232023-12-31n/a$1.27B$17.3M$129.6Mn/a$181.7M
FY 20222022-12-31n/an/a$173.7M$79.0Mn/a$169.9M
FY 20212021-12-31n/an/a$170.3M$69.9Mn/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.

Datasets

Frequently Asked Questions

How much of CCOI is sold short?
6,747,898 shares were held short at the 2026-08-14 settlement, 3.1 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 2026-09-11, 439,973 of the 813,621 CCOI shares reported to FINRA were sold short, 54.1% 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 640 CCOI shares failed to deliver at settlement 2026-08-12. Fails are reported per settlement date and published twice a month with a lag.
Are CCOI insiders buying or selling?
Insiders 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.
Have CCOI insiders filed to sell?
1 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.
Who owns more than 5% of CCOI?
2 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.
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 funds hold CCOI?
7 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.

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.