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Great Lakes Dredge & Dock CORP

GLDDDelisted Apr 1, 2026
Industry
Heavy Construction Other Than Bldg Const - Contractors
SEC CIK
0001372020

Great Lakes Dredge & Dock CORP was delisted on Apr 1, 2026; its insiders filed their last Form 4 on Apr 1, 2026; 182 institutions reported holding it in 13F filings for Q1 2026, worth $931.0M in total; no superinvestor held it.

Four kinds of short-selling data, each measuring something different:

  • Short interest: shares sold short and not yet bought back, as of a settlement date. FINRA publishes it twice a month, about eight business days after the settlement date.
  • Daily short volume: shares sold short each day in off-exchange trades reported to FINRA. It counts trades, not open positions, and is published the next day.
  • Fails-to-deliver: shares not delivered by the settlement date. The SEC publishes them twice a month, about two weeks late.
  • ATS (dark pool) volume: weekly volume on alternative trading systems and other off-exchange venues. FINRA publishes it two to four weeks after the week.

More in the glossary.

Short interest

Shares sold short and not yet bought back, from FINRA, on every settlement date in the last two years.

Short interest
1.57M
Shares, settlement Mar 31, 2026
Change
−1.36M
−46.5% vs. Mar 13, 2026
Days to cover
1.00
Short interest ÷ average daily volume
Average daily volume
1.92M
Shares, as reported by FINRA
Short interest by settlement date
Apr 15, 2024: 1,366,581 sharesApr 30, 2024: 1,564,308 sharesMay 15, 2024: 1,310,610 sharesMay 31, 2024: 1,005,281 sharesJun 14, 2024: 1,734,556 sharesJun 28, 2024: 1,495,450 sharesJul 15, 2024: 1,343,809 sharesJul 31, 2024: 1,357,157 sharesAug 15, 2024: 964,508 sharesAug 30, 2024: 979,739 sharesSep 13, 2024: 877,986 sharesSep 30, 2024: 823,224 sharesOct 15, 2024: 792,098 sharesOct 31, 2024: 670,359 sharesNov 15, 2024: 846,616 sharesNov 29, 2024: 761,159 sharesDec 13, 2024: 861,755 sharesDec 31, 2024: 577,114 sharesJan 15, 2025: 657,884 sharesJan 31, 2025: 640,960 sharesFeb 14, 2025: 711,532 sharesFeb 28, 2025: 754,854 sharesMar 14, 2025: 833,590 sharesMar 31, 2025: 970,791 sharesApr 15, 2025: 923,918 sharesApr 30, 2025: 973,316 sharesMay 15, 2025: 903,092 sharesMay 30, 2025: 885,789 sharesJun 13, 2025: 1,000,636 sharesJun 30, 2025: 990,324 sharesJul 15, 2025: 932,481 sharesJul 31, 2025: 859,347 sharesAug 15, 2025: 824,929 sharesAug 29, 2025: 792,264 sharesSep 15, 2025: 900,753 sharesSep 30, 2025: 727,223 sharesOct 15, 2025: 703,523 sharesOct 31, 2025: 988,015 sharesNov 14, 2025: 1,347,678 sharesNov 28, 2025: 1,497,702 sharesDec 15, 2025: 1,622,202 sharesDec 31, 2025: 1,601,394 sharesJan 15, 2026: 1,693,066 sharesJan 30, 2026: 2,079,026 sharesFeb 13, 2026: 2,450,984 sharesFeb 27, 2026: 2,441,466 sharesMar 13, 2026: 2,936,995 sharesMar 31, 2026: 1,572,087 shares
Short interest in GLDD by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Mar 31, 20261.57M−1.36M−46.5%1.92M1.00
Mar 13, 20262.94M+495.5K+20.3%1.95M1.51
Feb 27, 20262.44M−9.52K−0.4%1.34M1.82
Feb 13, 20262.45M+372.0K+17.9%2.70M1.00
Jan 30, 20262.08M+386.0K+22.8%1.03M2.02
Jan 15, 20261.69M+91.7K+5.7%931.8K1.82
Dec 31, 20251.60M−20.8K−1.3%371.3K4.31
Dec 15, 20251.62M+124.5K+8.3%468.2K3.46
Nov 28, 20251.50M+150.0K+11.1%342.6K4.37
Nov 14, 20251.35M+359.7K+36.4%503.8K2.68
Oct 31, 2025988.0K+284.5K+40.4%420.3K2.35
Oct 15, 2025703.5K−23.7K−3.3%324.5K2.17
Sep 30, 2025727.2K−173.5K−19.3%521.9K1.39
Sep 15, 2025900.8K+108.5K+13.7%360.4K2.50
Aug 29, 2025792.3K−32.7K−4.0%314.8K2.52
Aug 15, 2025824.9K−34.4K−4.0%521.1K1.58
Jul 31, 2025859.3K−73.1K−7.8%375.6K2.29
Jul 15, 2025932.5K−57.8K−5.8%422.4K2.21
Jun 30, 2025990.3K−10.3K−1.0%637.7K1.55
Jun 13, 20251.00M+114.8K+13.0%431.7K2.32
May 30, 2025885.8K−17.3K−1.9%522.4K1.70
May 15, 2025903.1K−70.2K−7.2%828.3K1.09
Apr 30, 2025973.3K+49.4K+5.4%452.6K2.15
Apr 15, 2025923.9K−46.9K−4.8%404.0K2.29
Mar 31, 2025970.8K+137.2K+16.5%484.8K2.00
Mar 14, 2025833.6K+78.7K+10.4%391.6K2.13
Feb 28, 2025754.9K+43.3K+6.1%816.2K1.00
Feb 14, 2025711.5K+70.6K+11.0%346.6K2.05
Jan 31, 2025641.0K−16.9K−2.6%383.3K1.67
Jan 15, 2025657.9K+80.8K+14.0%364.0K1.81
Dec 31, 2024577.1K−284.6K−33.0%423.3K1.36
Dec 13, 2024861.8K+100.6K+13.2%364.5K2.36
Nov 29, 2024761.2K−85.5K−10.1%470.5K1.62
Nov 15, 2024846.6K+176.3K+26.3%514.3K1.65
Oct 31, 2024670.4K−121.7K−15.4%348.9K1.92
Oct 15, 2024792.1K−31.1K−3.8%393.3K2.01
Sep 30, 2024823.2K−54.8K−6.2%446.7K1.84
Sep 13, 2024878.0K−101.8K−10.4%475.6K1.85
Aug 30, 2024979.7K+15.2K+1.6%742.5K1.32
Aug 15, 2024964.5K−392.6K−28.9%446.1K2.16
Jul 31, 20241.36M+13.3K+1.0%500.8K2.71
Jul 15, 20241.34M−151.6K−10.1%262.8K5.11
Jun 28, 20241.50M−239.1K−13.8%426.2K3.51
Jun 14, 20241.73M+729.3K+72.5%426.4K4.07
May 31, 20241.01M−305.3K−23.3%419.8K2.39
May 15, 20241.31M−253.7K−16.2%566.1K2.32
Apr 30, 20241.56M+197.7K+14.5%348.1K4.49
Apr 15, 20241.37M+27.8K+2.1%229.7K5.95

Fails-to-deliver

Shares that weren't delivered by the settlement date, from the SEC, for the last 30 dates with fails. The price is the previous day's closing price published by the SEC.

Fails-to-deliver in GLDD by settlement date
Settlement dateSharesPriceValue
Apr 1, 2026287,955$17.00$4.90M
Mar 31, 2026109,068$16.97$1.85M
Mar 30, 202611,419$16.97$193.8K
Mar 27, 2026285$16.97$4.84K
Mar 25, 2026196$16.97$3.33K
Mar 24, 2026196$16.95$3.32K
Mar 18, 202644,136$16.95$748.1K
Mar 16, 2026513$16.92$8.68K
Mar 13, 2026530$16.95$8.98K
Mar 12, 2026369$16.95$6.25K
Mar 10, 20262$16.95$33.9
Feb 23, 202626,252$16.89$443.4K
Feb 19, 20261,012$16.87$17.1K
Feb 17, 2026451$16.89$7.62K
Jan 22, 20265,782$14.80$85.6K
Dec 16, 2025105$13.89$1.46K
Nov 18, 20251$12.03$12.03
Oct 23, 2025191$11.02$2.10K
Sep 19, 202574$12.27$907.98
Sep 9, 202574$11.66$862.84
Aug 28, 20251$11.88$11.88
Aug 20, 2025122$11.37$1.39K
Aug 18, 2025533$11.35$6.05K
Aug 14, 2025807$11.69$9.43K
Aug 7, 2025375$11.07$4.15K
Aug 1, 2025314$11.08$3.48K
Jul 30, 202543$11.40$490.2
Jul 17, 202554$11.17$603.18
Jul 16, 2025200$10.92$2.18K
Jun 26, 20255,347$12.04$64.4K

Daily short volume

Off-exchange short-sale volume, not short interest: shares sold short each day in trades reported to FINRA, for the last 30 trading days.

The short volume ratio isn't a sentiment gauge: market makers sell short to fill buy orders and to hedge, so short sales are usually about half of off-exchange volume.

Off-exchange short volume in GLDD by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Mar 31, 2026323,9930596,90054.3%
Mar 30, 2026147,9000580,00025.5%
Mar 27, 2026236,8920651,45936.4%
Mar 26, 2026314,0060617,57950.8%
Mar 25, 202672,5101,000360,23020.1%
Mar 24, 2026163,8950992,18416.5%
Mar 23, 2026231,5980499,57846.4%
Mar 20, 2026159,9550288,64355.4%
Mar 19, 2026170,7670401,32542.6%
Mar 18, 2026163,3730394,66141.4%
Mar 17, 202680,2930373,27321.5%
Mar 16, 2026122,95901,377,3818.9%
Mar 13, 2026192,34002,188,9298.8%
Mar 12, 2026198,9910359,96555.3%
Mar 11, 202693,664150231,19940.5%
Mar 10, 2026296,2000751,11639.4%
Mar 9, 2026871,6272,7001,130,14577.1%
Mar 6, 2026888,2522,5601,535,46457.8%
Mar 5, 2026290,4610630,07446.1%
Mar 4, 2026459,2140698,76765.7%
Mar 3, 20261,218,18401,615,49375.4%
Mar 2, 2026205,1003,146548,40237.4%
Feb 27, 2026170,4960509,07033.5%
Feb 26, 2026128,7720589,15321.9%
Feb 25, 202677,3283,034263,34529.4%
Feb 24, 2026109,6590427,18225.7%
Feb 23, 2026109,6290306,09835.8%
Feb 20, 2026164,115211474,20434.6%
Feb 19, 2026188,0480841,66522.3%
Feb 18, 2026141,919300542,11026.2%

ATS (dark pool) volume

Weekly volume on alternative trading systems (ATS) and other off-exchange (OTC) venues, from FINRA, for the last 12 weeks. ATS share is ATS volume ÷ (ATS + OTC volume), not a share of all trading.

Weekly ATS and OTC volume in GLDD
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Mar 30, 2026T21,071,5706,466393,07274373.2%
Mar 23, 2026T22,359,51819,025884,7994,02572.7%
Mar 16, 2026T21,612,29814,1821,760,9973,63147.8%
Mar 9, 2026T22,700,48717,8602,057,4502,43956.8%
Mar 2, 2026T22,415,31921,6492,740,8913,01846.8%
Feb 23, 2026T21,660,47521,439564,7283,59674.6%
Feb 16, 2026T21,704,46629,3551,151,4923,26459.7%
Feb 9, 2026T25,002,44454,6935,183,8918,26749.1%
Feb 2, 2026T2620,63615,554710,2164,22846.6%
Jan 26, 2026T2746,77216,1801,057,1675,05241.4%
Jan 19, 2026T2836,63317,8021,065,4915,61644.0%
Jan 12, 2026T21,398,12718,9182,484,8489,05936.0%