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Waters Corp

WAT
Exchange
NYSE
Industry
Laboratory Analytical Instruments
SEC CIK
0001000697

No open-market purchases or sales by Waters Corp insiders were filed in the last 90 days; 1,189 institutions reported holding it in 13F filings for Q2 2026, worth $37.3B in total; 3 superinvestors hold it, including Fundsmith and Viking Global Investors.

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
3.33M
Shares, settlement Oct 30, 2026
Change
+138.2K
+4.3% vs. Oct 15, 2026
Days to cover
3.63
Short interest ÷ average daily volume
Average daily volume
916.4K
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 2,147,623 sharesNov 15, 2024: 2,081,785 sharesNov 29, 2024: 2,119,827 sharesDec 13, 2024: 1,975,031 sharesDec 31, 2024: 1,846,559 sharesJan 15, 2025: 1,687,643 sharesJan 31, 2025: 1,603,429 sharesFeb 14, 2025: 1,302,779 sharesFeb 28, 2025: 1,616,311 sharesMar 14, 2025: 1,488,216 sharesMar 31, 2025: 1,454,839 sharesApr 15, 2025: 1,571,700 sharesApr 30, 2025: 1,591,568 sharesMay 15, 2025: 1,667,228 sharesMay 30, 2025: 1,815,698 sharesJun 13, 2025: 1,717,376 sharesJun 30, 2025: 1,859,189 sharesJul 15, 2025: 2,017,818 sharesJul 31, 2025: 2,378,442 sharesAug 15, 2025: 2,400,764 sharesAug 29, 2025: 2,339,370 sharesSep 15, 2025: 2,289,893 sharesSep 30, 2025: 1,919,934 sharesOct 15, 2025: 2,381,697 sharesOct 31, 2025: 2,251,808 sharesNov 14, 2025: 2,294,458 sharesNov 28, 2025: 2,356,870 sharesDec 15, 2025: 2,309,807 sharesDec 31, 2025: 2,123,488 sharesJan 15, 2026: 2,028,660 sharesJan 30, 2026: 2,249,650 sharesFeb 13, 2026: 2,667,586 sharesFeb 27, 2026: 2,570,136 sharesMar 13, 2026: 2,573,341 sharesMar 31, 2026: 3,319,229 sharesApr 15, 2026: 3,730,912 sharesApr 30, 2026: 3,428,205 sharesMay 15, 2026: 3,938,447 sharesMay 29, 2026: 4,475,854 sharesJun 15, 2026: 4,510,715 sharesJun 30, 2026: 3,702,766 sharesJul 15, 2026: 3,662,258 sharesJul 31, 2026: 4,166,848 sharesAug 14, 2026: 3,635,708 sharesAug 31, 2026: 3,294,037 sharesSep 15, 2026: 3,304,268 sharesSep 30, 2026: 3,404,650 sharesOct 15, 2026: 3,191,944 sharesOct 30, 2026: 3,330,131 shares
Short interest in WAT by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 20263.33M+138.2K+4.3%916.4K3.63
Oct 15, 20263.19M−212.7K−6.3%938.7K3.40
Sep 30, 20263.40M+100.4K+3.0%779.7K4.37
Sep 15, 20263.30M+10.2K+0.3%571.8K5.78
Aug 31, 20263.29M−341.7K−9.4%727.8K4.53
Aug 14, 20263.64M−531.1K−12.8%935.7K3.89
Jul 31, 20264.17M+504.6K+13.8%878.4K4.74
Jul 15, 20263.66M−40.5K−1.1%688.2K5.32
Jun 30, 20263.70M−807.9K−17.9%1.15M3.21
Jun 15, 20264.51M+34.9K+0.8%850.9K5.30
May 29, 20264.48M+537.4K+13.7%1.04M4.30
May 15, 20263.94M+510.2K+14.9%1.38M2.86
Apr 30, 20263.43M−302.7K−8.1%966.7K3.55
Apr 15, 20263.73M+411.7K+12.4%812.7K4.59
Mar 31, 20263.32M+745.9K+29.0%1.08M3.07
Mar 13, 20262.57M+3.21K+0.1%1.16M2.21
Feb 27, 20262.57M−97.5K−3.7%1.41M1.82
Feb 13, 20262.67M+417.9K+18.6%2.00M1.34
Jan 30, 20262.25M+221.0K+10.9%516.5K4.36
Jan 15, 20262.03M−94.8K−4.5%483.5K4.20
Dec 31, 20252.12M−186.3K−8.1%517.9K4.10
Dec 15, 20252.31M−47.1K−2.0%539.7K4.28
Nov 28, 20252.36M+62.4K+2.7%564.1K4.18
Nov 14, 20252.29M+42.6K+1.9%742.4K3.09
Oct 31, 20252.25M−129.9K−5.5%567.7K3.97
Oct 15, 20252.38M+461.8K+24.1%769.6K3.09
Sep 30, 20251.92M−370.0K−16.2%785.4K2.44
Sep 15, 20252.29M−49.5K−2.1%609.0K3.76
Aug 29, 20252.34M−61.4K−2.6%576.6K4.06
Aug 15, 20252.40M+22.3K+0.9%838.1K2.86
Jul 31, 20252.38M+360.6K+17.9%1.19M2.00
Jul 15, 20252.02M+158.6K+8.5%931.2K2.17
Jun 30, 20251.86M+141.8K+8.3%521.0K3.57
Jun 13, 20251.72M−98.3K−5.4%423.7K4.05
May 30, 20251.82M+148.5K+8.9%528.7K3.43
May 15, 20251.67M+75.7K+4.8%600.1K2.78
Apr 30, 20251.59M+19.9K+1.3%426.1K3.74
Apr 15, 20251.57M+116.9K+8.0%797.7K1.97
Mar 31, 20251.45M−33.4K−2.2%444.2K3.28
Mar 14, 20251.49M−128.1K−7.9%525.8K2.83
Feb 28, 20251.62M+313.5K+24.1%503.8K3.21
Feb 14, 20251.30M−300.6K−18.8%513.3K2.54
Jan 31, 20251.60M−84.2K−5.0%392.4K4.09
Jan 15, 20251.69M−158.9K−8.6%469.4K3.60
Dec 31, 20241.85M−128.5K−6.5%478.6K3.86
Dec 13, 20241.98M−144.8K−6.8%402.1K4.91
Nov 29, 20242.12M+38.0K+1.8%637.9K3.32
Nov 15, 20242.08M−65.8K−3.1%652.1K3.19
Oct 31, 20242.15M−185.7K−8.0%401.1K5.35

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 WAT by settlement date
Settlement dateSharesPriceValue
Oct 14, 202626$429.17$11.2K
Oct 9, 202663$429.13$27.0K
Oct 8, 202617,429$435.99$7.60M
Oct 7, 20261$436.43$436.43
Oct 6, 202613$440.12$5.72K
Sep 28, 20262$433.54$867.08
Sep 14, 2026405$408.34$165.4K
Sep 9, 202629$402.91$11.7K
Aug 25, 2026623$410.75$255.9K
Aug 24, 20261$410.70$410.7
Aug 21, 2026575$404.69$232.7K
Aug 17, 2026341$412.17$140.5K
Aug 14, 2026189$413.51$78.2K
Aug 7, 20261,441$399.70$576.0K
Aug 6, 202661$400.00$24.4K
Jul 17, 20268,171$378.19$3.09M
Jul 14, 20265,413$373.22$2.02M
Jul 13, 20261,131$376.43$425.7K
Jul 10, 202612$377.13$4.53K
Jul 8, 2026670$374.93$251.2K
Jun 30, 20261,162$368.87$428.6K
Jun 29, 20267$374.41$2.62K
Jun 24, 202649$357.20$17.5K
Jun 22, 20262,532$355.44$900.0K
Jun 17, 20267,878$360.54$2.84M
Jun 11, 202660$363.18$21.8K
Jun 8, 2026695$365.36$253.9K
Jun 5, 202640$376.47$15.1K
Jun 3, 2026265$371.93$98.6K
Jun 2, 2026418$378.16$158.1K

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 WAT by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 2026164,81629262,35862.8%
Nov 9, 2026204,6924,381358,56857.1%
Nov 6, 2026122,545232298,93941.0%
Nov 5, 2026286,9173543,66252.8%
Nov 4, 2026325,8461,022478,74768.1%
Nov 3, 2026386,4670846,56245.7%
Nov 2, 2026224,1491,991930,93124.1%
Oct 30, 2026174,4093,194573,51430.4%
Oct 29, 2026204,35912484,23242.2%
Oct 28, 2026257,14824426,81160.2%
Oct 27, 2026242,2762,977313,80277.2%
Oct 26, 2026270,20233442,12861.1%
Oct 23, 2026227,67415409,16455.6%
Oct 22, 2026418,11150592,51770.6%
Oct 21, 2026216,8700328,83566.0%
Oct 20, 2026238,333188340,81869.9%
Oct 19, 2026122,991799236,50652.0%
Oct 16, 2026244,06355465,08152.5%
Oct 15, 2026244,531109397,46061.5%
Oct 14, 2026193,736117330,09058.7%
Oct 13, 2026222,250140543,93840.9%
Oct 12, 2026161,387164476,13433.9%
Oct 9, 2026227,829723556,53440.9%
Oct 8, 2026351,057248628,55455.9%
Oct 7, 2026300,02334369,61681.2%
Oct 6, 2026337,4501,171512,33065.9%
Oct 5, 2026206,70147530,03139.0%
Oct 2, 2026186,88464280,00966.7%
Oct 1, 2026217,32582319,87367.9%
Sep 30, 2026209,78113305,18168.7%

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 WAT
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 19, 2026T11,508,61145,533604,58425,48971.4%
Oct 12, 2026T11,872,09654,795657,65420,99174.0%
Oct 5, 2026T11,895,40957,006877,22124,43568.4%
Sep 28, 2026T11,260,77548,252528,55020,49370.5%
Sep 21, 2026T11,283,38645,334503,40314,85271.8%
Sep 14, 2026T11,209,93844,008433,62320,68973.6%
Sep 7, 2026T1730,07631,947209,03210,21877.7%
Aug 31, 2026T1802,70534,645373,37215,48268.3%
Aug 24, 2026T1931,15040,032377,27611,31571.2%
Aug 17, 2026T11,539,14448,886521,55212,17874.7%
Aug 10, 2026T11,209,38444,617275,97011,24981.4%
Aug 3, 2026T12,345,13468,474647,41014,10178.4%