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Livermore
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Wesco International Inc

WCC
Exchange
NYSE
Industry
Wholesale-Electrical Apparatus & Equipment, Wiring Supplies
SEC CIK
0000929008

In the last 90 days, Wesco International Inc insiders filed 2 open-market purchases and 2 sales; 709 institutions reported holding it in 13F filings for Q2 2026, worth $16.2B in total; Baupost Group is the only superinvestor holding 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
1.24M
Shares, settlement Oct 15, 2026
Change
−159.8K
−11.4% vs. Sep 30, 2026
Days to cover
1.81
Short interest ÷ average daily volume
Average daily volume
685.9K
Shares, as reported by FINRA
Short interest by settlement date
Oct 15, 2024: 1,085,179 sharesOct 31, 2024: 947,122 sharesNov 15, 2024: 1,211,268 sharesNov 29, 2024: 1,237,020 sharesDec 13, 2024: 1,852,510 sharesDec 31, 2024: 981,172 sharesJan 15, 2025: 1,082,719 sharesJan 31, 2025: 1,175,307 sharesFeb 14, 2025: 1,450,758 sharesFeb 28, 2025: 1,404,331 sharesMar 14, 2025: 1,801,454 sharesMar 31, 2025: 1,360,732 sharesApr 15, 2025: 1,557,404 sharesApr 30, 2025: 1,106,969 sharesMay 15, 2025: 1,389,323 sharesMay 30, 2025: 1,427,664 sharesJun 13, 2025: 2,310,233 sharesJun 30, 2025: 1,858,692 sharesJul 15, 2025: 1,801,620 sharesJul 31, 2025: 1,511,013 sharesAug 15, 2025: 1,754,615 sharesAug 29, 2025: 1,626,973 sharesSep 15, 2025: 1,773,043 sharesSep 30, 2025: 1,842,441 sharesOct 15, 2025: 1,921,196 sharesOct 31, 2025: 2,623,532 sharesNov 14, 2025: 2,787,813 sharesNov 28, 2025: 2,500,064 sharesDec 15, 2025: 2,608,467 sharesDec 31, 2025: 2,049,346 sharesJan 15, 2026: 2,129,521 sharesJan 30, 2026: 1,878,147 sharesFeb 13, 2026: 1,433,499 sharesFeb 27, 2026: 1,855,187 sharesMar 13, 2026: 2,126,202 sharesMar 31, 2026: 1,634,245 sharesApr 15, 2026: 1,628,623 sharesApr 30, 2026: 1,266,910 sharesMay 15, 2026: 1,910,192 sharesMay 29, 2026: 1,631,986 sharesJun 15, 2026: 1,772,355 sharesJun 30, 2026: 1,368,671 sharesJul 15, 2026: 1,250,310 sharesJul 31, 2026: 1,703,518 sharesAug 14, 2026: 1,412,372 sharesAug 31, 2026: 1,418,792 sharesSep 15, 2026: 1,443,219 sharesSep 30, 2026: 1,404,569 sharesOct 15, 2026: 1,244,768 shares
Short interest in WCC by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 15, 20261.24M−159.8K−11.4%685.9K1.81
Sep 30, 20261.40M−38.6K−2.7%452.9K3.10
Sep 15, 20261.44M+24.4K+1.7%531.2K2.72
Aug 31, 20261.42M+6.42K+0.5%477.6K2.97
Aug 14, 20261.41M−291.1K−17.1%539.1K2.62
Jul 31, 20261.70M+453.2K+36.3%776.5K2.19
Jul 15, 20261.25M−118.4K−8.7%861.8K1.45
Jun 30, 20261.37M−403.7K−22.8%613.0K2.23
Jun 15, 20261.77M+140.4K+8.6%509.5K3.48
May 29, 20261.63M−278.2K−14.6%458.3K3.56
May 15, 20261.91M+643.3K+50.8%695.6K2.75
Apr 30, 20261.27M−361.7K−22.2%683.8K1.85
Apr 15, 20261.63M−5.62K−0.3%477.6K3.41
Mar 31, 20261.63M−492.0K−23.1%549.3K2.98
Mar 13, 20262.13M+271.0K+14.6%685.6K3.10
Feb 27, 20261.86M+421.7K+29.4%521.2K3.56
Feb 13, 20261.43M−444.6K−23.7%994.1K1.44
Jan 30, 20261.88M−251.4K−11.8%359.3K5.23
Jan 15, 20262.13M+80.2K+3.9%489.9K4.35
Dec 31, 20252.05M−559.1K−21.4%450.9K4.55
Dec 15, 20252.61M+108.4K+4.3%480.8K5.43
Nov 28, 20252.50M−287.7K−10.3%568.1K4.40
Nov 14, 20252.79M+164.3K+6.3%605.3K4.61
Oct 31, 20252.62M+702.3K+36.6%755.6K3.47
Oct 15, 20251.92M+78.8K+4.3%487.0K3.95
Sep 30, 20251.84M+69.4K+3.9%733.2K2.51
Sep 15, 20251.77M+146.1K+9.0%642.5K2.76
Aug 29, 20251.63M−127.6K−7.3%545.0K2.99
Aug 15, 20251.75M+243.6K+16.1%579.1K3.03
Jul 31, 20251.51M−290.6K−16.1%875.6K1.73
Jul 15, 20251.80M−57.1K−3.1%581.3K3.10
Jun 30, 20251.86M−451.5K−19.6%679.2K2.74
Jun 13, 20252.31M+882.6K+61.8%534.0K4.33
May 30, 20251.43M+38.3K+2.8%594.2K2.40
May 15, 20251.39M+282.4K+25.5%756.5K1.84
Apr 30, 20251.11M−450.4K−28.9%761.5K1.45
Apr 15, 20251.56M+196.7K+14.5%1.06M1.48
Mar 31, 20251.36M−440.7K−24.5%750.8K1.81
Mar 14, 20251.80M+397.1K+28.3%964.7K1.87
Feb 28, 20251.40M−46.4K−3.2%715.5K1.96
Feb 14, 20251.45M+275.5K+23.4%905.2K1.60
Jan 31, 20251.18M+92.6K+8.6%602.8K1.95
Jan 15, 20251.08M+101.5K+10.4%571.4K1.89
Dec 31, 2024981.2K−871.3K−47.0%785.1K1.25
Dec 13, 20241.85M+615.5K+49.8%515.0K3.60
Nov 29, 20241.24M+25.8K+2.1%572.8K2.16
Nov 15, 20241.21M+264.1K+27.9%876.4K1.38
Oct 31, 2024947.1K−138.1K−12.7%750.2K1.26
Oct 15, 20241.09M−79.0K−6.8%688.3K1.58

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 WCC by settlement date
Settlement dateSharesPriceValue
Oct 8, 202682$366.12$30.0K
Oct 7, 202682$384.09$31.5K
Aug 20, 202616,473$343.85$5.66M
Aug 6, 2026226$373.08$84.3K
Aug 3, 202649$343.49$16.8K
Jul 10, 20264$328.91$1.32K
Jul 1, 202621$345.43$7.25K
Jun 25, 202655$351.97$19.4K
Jun 24, 2026212$353.09$74.9K
Jun 15, 2026393$346.77$136.3K
May 26, 2026111$363.57$40.4K
May 20, 202658$337.06$19.5K
May 6, 2026238$350.59$83.4K
May 5, 20264,397$346.66$1.52M
May 4, 20264,271$354.59$1.51M
May 1, 2026447$349.12$156.1K
Apr 28, 20261,196$315.57$377.4K
Apr 20, 2026543$319.06$173.2K
Apr 15, 202660$310.11$18.6K
Apr 2, 202617$282.46$4.80K
Mar 27, 202636$265.98$9.58K
Mar 25, 202656$273.50$15.3K
Mar 12, 20268,335$265.27$2.21M
Mar 6, 20268$281.84$2.25K
Mar 2, 2026998$289.50$288.9K
Feb 27, 2026156$295.84$46.2K
Feb 23, 2026200$296.99$59.4K
Feb 17, 20263,268$307.10$1.00M
Feb 6, 20262,283$299.49$683.7K
Feb 5, 20264,705$301.37$1.42M

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 WCC by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 9, 2026140,045791315,26344.4%
Nov 6, 2026150,2132,125320,18646.9%
Nov 5, 2026218,34310,180552,30139.5%
Nov 4, 2026113,5841,220415,97127.3%
Nov 3, 202687,692464338,13025.9%
Nov 2, 2026111,9413,805243,91745.9%
Oct 30, 202692,1800202,61245.5%
Oct 29, 2026301,2983,259673,09344.8%
Oct 28, 2026198,5250447,26844.4%
Oct 27, 202683,9500213,32539.4%
Oct 26, 2026114,29540228,52750.0%
Oct 23, 2026142,0841,635262,53854.1%
Oct 22, 2026231,1982,273585,79939.5%
Oct 21, 202683,066120175,38447.4%
Oct 20, 2026110,7335189,98158.3%
Oct 19, 202675,0890164,22645.7%
Oct 16, 2026137,22349222,66561.6%
Oct 15, 2026202,492986411,22249.2%
Oct 14, 2026177,2134355,17149.9%
Oct 13, 2026150,225125356,38942.2%
Oct 12, 202685,7060166,65151.4%
Oct 9, 2026189,0771,807404,96146.7%
Oct 8, 2026117,84133353,60833.3%
Oct 7, 2026150,14326362,58541.4%
Oct 6, 202653,62814196,25327.3%
Oct 5, 202676,153411164,08746.4%
Oct 2, 202691,3344194,26347.0%
Oct 1, 2026122,1542,199204,64459.7%
Sep 30, 202653,986272125,96442.9%
Sep 29, 202662,1080119,88651.8%

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 WCC
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 19, 2026T11,178,44237,255252,50312,06982.4%
Oct 12, 2026T11,272,70550,131337,95312,22779.0%
Oct 5, 2026T11,251,85042,182338,59212,18478.7%
Sep 28, 2026T1801,25232,423282,8799,95873.9%
Sep 21, 2026T1676,65831,838209,2749,82876.4%
Sep 14, 2026T1717,51528,671267,6939,49172.8%
Sep 7, 2026T1931,33531,956251,87110,42778.7%
Aug 31, 2026T1672,15430,893350,27010,48465.7%
Aug 24, 2026T1750,71031,814227,7289,67976.7%
Aug 17, 2026T1939,34841,017259,04611,46078.4%
Aug 10, 2026T1628,11732,651216,8488,22774.3%
Aug 3, 2026T11,089,63843,620287,89412,52679.1%