XOOMAR

Costamare Bulkers Holdings Ltd (CMDB)

Every FINRA and SEC series the site collects for Costamare Bulkers Holdings Ltd: short interest with days to cover, daily short sale volume, fails to deliver and Form 4 insider trades. Listed on NYSE.

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246K

Short interest

settlement 2026-08-14

2.9

Days to cover

+13.2% vs prior

60.2%

Short share of volume

2026-09-11

291

Fails to deliver

settlement 2026-08-13

-$443K

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 31 settlements in the JSON

As of 14 August 2026, short interest in CMDB is 246,240 shares, up 11,122 shares over the last month. Over the last 31 readings it ranged from 109,735 shares (30 May 2025) to 246,240 shares (14 August 2026). The latest reading sits at the top of that range. At the reported average volume of 85K shares a day that is 2.9 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-08-14246,240+13.2%84,8292.90
2026-07-31217,484-7.5%53,2364.09
2026-07-15235,118+24.0%81,6922.88
2026-06-30189,573+16.9%78,6202.41
2026-06-15162,091+9.3%45,3233.58
2026-05-29148,313-7.1%35,8024.14
2026-05-15159,666+9.6%42,1123.79
2026-04-30145,646+0.8%43,6683.34
2026-04-15144,558-0.1%50,5912.86
2026-03-31144,777+2.5%46,8933.09
2026-03-13141,307+21.0%52,1242.71
2026-02-27116,819-0.8%69,1721.69
2026-02-13117,800-6.5%110,3621.07
2026-01-30126,045+0.6%51,4682.45
2026-01-15125,336+8.7%35,6273.52
2025-12-31115,360-28.2%42,8822.69
2025-12-15160,604-8.0%39,7514.04
2025-11-28174,648-3.8%80,4602.17
2025-11-14181,531+4.7%36,9744.91
2025-10-31173,358-7.2%35,9274.83
2025-10-15186,883+9.3%76,7132.44
2025-09-30170,954+15.5%90,2091.90
2025-09-15147,974+22.0%97,6941.51
2025-08-29121,261+1.1%95,1721.27

Daily short volume

FINRA Reg SHO, last 60 sessions. JSON

As of 11 September 2026, the short share of CMDB volume is 60.2%, up 7.2 points over the last five sessions. Over the last 52 readings it ranged from 30.8% (6 August 2026) to 80.6% (27 July 2026). The latest reading is 4.5 points above the 30-session average of 55.7%, on 15K shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-09-119K15K60.2%0
2026-09-109K15K60.7%0
2026-09-0918K28K65.1%0
2026-09-0824K41K58.1%0
2026-09-0417K25K68.9%0
2026-09-0316K31K52.9%0
2026-09-0210K20K48.3%0
2026-09-016K8K74.6%0
2026-08-3113K23K54.8%1
2026-08-2813K21K59.4%0
2026-08-279K17K56.0%0
2026-08-2612K25K47.2%0
2026-08-2511K24K44.9%0
2026-08-2418K25K70.2%0
2026-08-2117K23K76.3%51
2026-08-2011K26K42.8%45
2026-08-1910K20K48.4%0
2026-08-1814K27K53.8%0
2026-08-1714K19K74.4%0
2026-08-146K11K57.6%0
2026-08-138K17K44.6%0
2026-08-124K10K43.3%0
2026-08-1119K36K51.8%0
2026-08-107K19K39.8%0
2026-08-079K16K55.7%0
2026-08-0613K43K30.8%0
2026-08-0514K30K48.8%0
2026-08-0430K64K47.8%0
2026-08-0317K26K63.7%0
2026-07-3110K14K70.3%0

Fails to deliver

SEC, by settlement date. JSON

As of 13 August 2026, the fails-to-deliver balance in CMDB is 291 shares, up 239 shares over the last settlement date. Over the last 22 readings it ranged from 4 shares (10 March 2026) to 7,458 shares (30 September 2025). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-08-13291$17.68$5K
2026-08-0452$20.14$1K
2026-08-03662$19.56$13K
2026-07-31323$19.41$6K
2026-07-27555$18.84$10K
2026-06-25207$17.62$4K
2026-06-1885$16.64$1K
2026-06-15145$17.97$3K
2026-06-081,722$16.51$28K
2026-06-031,690$16.56$28K
2026-04-153,065$17.40$53K
2026-04-06499$17.33$9K
2026-04-02332$16.15$5K
2026-03-104$17.51$70
2026-01-2060$14.91$895
2025-12-08750$16.77$13K
2025-11-0672$13.18$949
2025-10-14511$13.51$7K
2025-10-0620$14.20$284
2025-10-02208$14.25$3K
2025-09-307,458$14.50$108K
2025-09-265,000$12.74$64K

Insider trades

SEC Form 4, newest first. JSON

Insiders at CMDB reported 1 open-market sell worth $443K 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: Zikos Grigorios (Chief Executive Officer) on 2026-08-06.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-08-06Zikos GrigoriosChief Executive OfficerSell24K$18.30$443K0
2026-03-27Eleftheriou Katerinan/aBuy65$15.11$982865

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 CMDB worth $443K at the prices reported; 1 in the last 90 days worth $443K. Latest: DILOFO HOLDINGS LIMITED filed on 2026-08-06 to sell 24,203 shares ($443K) from 2026-08-06.

FiledSellerSharesMarket valueOf outstandingSale fromBroker
2026-08-06DILOFO HOLDINGS LIMITEDOfficer, Director24K$443K0.100%2026-08-06Morgan 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 CMDB, 2 on Schedule 13D (active intent). The largest reported stake is Achillefs Konstantakopoulos at 20.5% of the class (4,979,706 shares), filed 2026-07-20 for an event on 2026-07-17.

FiledFormHolderSharesOf classEvent
2026-07-2013DAchillefs Konstantakopoulosindividual5.0M20.5%2026-07-17
2026-07-2013DCostamare Shipping Services Ltd.corporation811K3.3%2026-07-17

13F holders

Tracked managers holding CMDB at their latest 13F. JSON

6 of the 30 tracked managers held CMDB at their latest 13F, $6.4M in total at quarter-end prices. Renaissance Technologies is the largest at $3.4M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 2 cut.

FundQuarterSharesValueOf portfolioChange in shares
Renaissance Technologies2026-06-30196K$3.4M0.00%-8K
Two Sigma Investments2026-06-3064K$1.1M0.00%+36K
Citadel Advisors2026-06-3033K$588K0.00%-25K
Millennium Management2026-06-3031K$541K0.00%new or n/a
AQR Capital Management2026-06-3025K$443K0.00%+12K
Point72 Asset Management2026-06-3013K$226K0.00%+1K

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.

What this page is

Costamare Bulkers Holdings Ltd 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 Costamare Bulkers Holdings Ltd (CMDB), SEC CIK 2033535, listed on NYSE. 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 2026-08-13.JSON and CSV
Planned sales
SEC EDGAR Form 144EDGAR read every 30 minutes; a notice is filed on or before the sell order. Latest 2026-08-06.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 2026-07-20.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
Insider trades
SEC EDGAR Form 4EDGAR read every 30 minutes; filings are due two business days after the trade. Latest 2026-08-06.JSON and CSV
Company record
EDGAR filing index for CIK 2033535Ticker, 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, 12 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.

Other company pages

Datasets

Frequently Asked Questions

How much of CMDB is sold short?
246,240 shares were held short at the 2026-08-14 settlement, 2.9 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 CMDB's daily short volume?
On 2026-09-11, 9,170 of the 15,240 CMDB shares reported to FINRA were sold short, 60.2% of the day's reported volume. Short volume is a flow for one day, not a position.
Does CMDB have fails to deliver?
The SEC's latest file shows 291 CMDB shares failed to deliver at settlement 2026-08-13. Fails are reported per settlement date and published twice a month with a lag.
Are CMDB insiders buying or selling?
Insiders at CMDB reported 1 open-market sell worth $443K 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: Zikos Grigorios (Chief Executive Officer) on 2026-08-06.
Have CMDB insiders filed to sell?
1 Form 144 notice on file for CMDB worth $443K at the prices reported; 1 in the last 90 days worth $443K. Latest: DILOFO HOLDINGS LIMITED filed on 2026-08-06 to sell 24,203 shares ($443K) from 2026-08-06.
Who owns more than 5% of CMDB?
2 holders above 5% have filed on CMDB, 2 on Schedule 13D (active intent). The largest reported stake is Achillefs Konstantakopoulos at 20.5% of the class (4,979,706 shares), filed 2026-07-20 for an event on 2026-07-17.
Which funds hold CMDB?
6 of the 30 tracked managers held CMDB at their latest 13F, $6.4M in total at quarter-end prices. Renaissance Technologies is the largest at $3.4M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 2 cut.

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