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Labcorp Holdings Inc.

LH
Exchange
NYSE
Industry
Services-Medical Laboratories
SEC CIK
0000920148

In the last 90 days, Labcorp Holdings Inc. insiders filed 0 open-market purchases and 3 sales; 1,064 institutions reported holding it in 13F filings for Q2 2026, worth $22.2B in total; Weitz Investment Management 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
2.54M
Shares, settlement Oct 30, 2026
Change
−13.2K
−0.5% vs. Oct 15, 2026
Days to cover
3.01
Short interest ÷ average daily volume
Average daily volume
846.3K
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 2,033,742 sharesNov 15, 2024: 2,230,533 sharesNov 29, 2024: 1,974,381 sharesDec 13, 2024: 1,965,703 sharesDec 31, 2024: 1,921,215 sharesJan 15, 2025: 2,014,329 sharesJan 31, 2025: 1,902,677 sharesFeb 14, 2025: 1,831,926 sharesFeb 28, 2025: 1,850,610 sharesMar 14, 2025: 1,901,346 sharesMar 31, 2025: 1,888,201 sharesApr 15, 2025: 2,537,162 sharesApr 30, 2025: 2,944,603 sharesMay 15, 2025: 2,802,154 sharesMay 30, 2025: 3,108,280 sharesJun 13, 2025: 3,440,413 sharesJun 30, 2025: 3,559,484 sharesJul 15, 2025: 3,373,750 sharesJul 31, 2025: 2,748,516 sharesAug 15, 2025: 2,676,087 sharesAug 29, 2025: 2,753,979 sharesSep 15, 2025: 2,495,734 sharesSep 30, 2025: 2,509,347 sharesOct 15, 2025: 2,438,588 sharesOct 31, 2025: 2,684,426 sharesNov 14, 2025: 3,211,771 sharesNov 28, 2025: 3,115,917 sharesDec 15, 2025: 3,152,732 sharesDec 31, 2025: 3,115,323 sharesJan 15, 2026: 3,032,698 sharesJan 30, 2026: 3,191,344 sharesFeb 13, 2026: 3,017,792 sharesFeb 27, 2026: 3,200,111 sharesMar 13, 2026: 2,992,293 sharesMar 31, 2026: 3,192,818 sharesApr 15, 2026: 3,236,989 sharesApr 30, 2026: 3,156,205 sharesMay 15, 2026: 3,369,697 sharesMay 29, 2026: 3,426,602 sharesJun 15, 2026: 3,264,521 sharesJun 30, 2026: 2,830,398 sharesJul 15, 2026: 2,721,939 sharesJul 31, 2026: 2,094,544 sharesAug 14, 2026: 1,938,163 sharesAug 31, 2026: 2,103,302 sharesSep 15, 2026: 2,448,617 sharesSep 30, 2026: 2,684,363 sharesOct 15, 2026: 2,557,656 sharesOct 30, 2026: 2,544,414 shares
Short interest in LH by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 20262.54M−13.2K−0.5%846.3K3.01
Oct 15, 20262.56M−126.7K−4.7%606.8K4.22
Sep 30, 20262.68M+235.7K+9.6%892.5K3.01
Sep 15, 20262.45M+345.3K+16.4%740.8K3.31
Aug 31, 20262.10M+165.1K+8.5%660.4K3.18
Aug 14, 20261.94M−156.4K−7.5%505.3K3.84
Jul 31, 20262.09M−627.4K−23.1%959.2K2.18
Jul 15, 20262.72M−108.5K−3.8%575.2K4.73
Jun 30, 20262.83M−434.1K−13.3%743.9K3.80
Jun 15, 20263.26M−162.1K−4.7%544.8K5.99
May 29, 20263.43M+56.9K+1.7%588.5K5.82
May 15, 20263.37M+213.5K+6.8%718.3K4.69
Apr 30, 20263.16M−80.8K−2.5%766.9K4.12
Apr 15, 20263.24M+44.2K+1.4%539.8K6.00
Mar 31, 20263.19M+200.5K+6.7%585.8K5.45
Mar 13, 20262.99M−207.8K−6.5%505.2K5.92
Feb 27, 20263.20M+182.3K+6.0%825.9K3.87
Feb 13, 20263.02M−173.6K−5.4%724.5K4.17
Jan 30, 20263.19M+158.6K+5.2%787.2K4.05
Jan 15, 20263.03M−82.6K−2.7%816.4K3.71
Dec 31, 20253.12M−37.4K−1.2%637.6K4.89
Dec 15, 20253.15M+36.8K+1.2%613.5K5.14
Nov 28, 20253.12M−95.9K−3.0%744.2K4.19
Nov 14, 20253.21M+527.3K+19.6%1.27M2.53
Oct 31, 20252.68M+245.8K+10.1%973.1K2.76
Oct 15, 20252.44M−70.8K−2.8%571.4K4.27
Sep 30, 20252.51M+13.6K+0.6%502.9K4.99
Sep 15, 20252.50M−258.2K−9.4%431.8K5.78
Aug 29, 20252.75M+77.9K+2.9%478.2K5.76
Aug 15, 20252.68M−72.4K−2.6%503.3K5.32
Jul 31, 20252.75M−625.2K−18.5%906.2K3.03
Jul 15, 20253.37M−185.7K−5.2%792.2K4.26
Jun 30, 20253.56M+119.1K+3.5%761.5K4.67
Jun 13, 20253.44M+332.1K+10.7%603.2K5.70
May 30, 20253.11M+306.1K+10.9%686.5K4.53
May 15, 20252.80M−142.4K−4.8%783.5K3.58
Apr 30, 20252.94M+407.4K+16.1%971.8K3.03
Apr 15, 20252.54M+649.0K+34.4%1.05M2.42
Mar 31, 20251.89M−13.1K−0.7%607.8K3.11
Mar 14, 20251.90M+50.7K+2.7%820.1K2.32
Feb 28, 20251.85M+18.7K+1.0%486.5K3.80
Feb 14, 20251.83M−70.8K−3.7%680.4K2.69
Jan 31, 20251.90M−111.7K−5.5%572.8K3.32
Jan 15, 20252.01M+93.1K+4.9%570.4K3.53
Dec 31, 20241.92M−44.5K−2.3%471.7K4.07
Dec 13, 20241.97M−8.68K−0.4%473.8K4.15
Nov 29, 20241.97M−256.2K−11.5%529.6K3.73
Nov 15, 20242.23M+196.8K+9.7%785.7K2.84
Oct 31, 20242.03M+194.1K+10.6%753.1K2.70

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 LH by settlement date
Settlement dateSharesPriceValue
Oct 14, 202636$313.64$11.3K
Oct 6, 202645$308.65$13.9K
Oct 5, 202627$308.49$8.33K
Oct 2, 2026254$304.60$77.4K
Sep 14, 202618$311.54$5.61K
Aug 28, 2026142$336.54$47.8K
Aug 6, 20266,608$313.96$2.07M
Aug 5, 20261,189$312.34$371.4K
Aug 4, 20261,198$307.42$368.3K
Jul 27, 20263,454$296.77$1.03M
Jul 23, 20267,999$281.46$2.25M
Jul 20, 2026382$283.36$108.2K
Jul 10, 202660$277.63$16.7K
Jul 7, 2026480$284.39$136.5K
Jun 30, 202698$279.58$27.4K
Jun 17, 2026676$264.76$179.0K
Jun 9, 202653$262.01$13.9K
Jun 4, 20262$258.92$517.84
Jun 2, 2026937$256.87$240.7K
May 26, 202675$259.93$19.5K
May 20, 2026690$253.69$175.0K
May 19, 2026796$255.57$203.4K
Apr 28, 20264$263.43$1.05K
Apr 15, 20262,950$268.87$793.2K
Apr 13, 202613$260.93$3.39K
Mar 25, 202613$266.12$3.46K
Mar 24, 20263,007$264.42$795.1K
Mar 17, 20261,010$266.85$269.5K
Mar 13, 20267,142$262.91$1.88M
Mar 10, 2026241$273.61$65.9K

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 LH by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 202680,589108185,59243.4%
Nov 9, 2026116,3057274,50242.4%
Nov 6, 2026142,13026224,24163.4%
Nov 5, 2026169,933687267,51663.5%
Nov 4, 2026201,550291329,34961.2%
Nov 3, 2026127,8390303,62242.1%
Nov 2, 2026130,516664456,09128.6%
Oct 30, 2026153,7120304,29550.5%
Oct 29, 2026243,3333533,08445.6%
Oct 28, 2026434,2160854,62350.8%
Oct 27, 2026150,12277390,28938.5%
Oct 26, 202679,1740252,72231.3%
Oct 23, 2026143,83416265,11054.3%
Oct 22, 2026219,53114363,78960.3%
Oct 21, 2026105,7961210,30550.3%
Oct 20, 2026112,7382237,43147.5%
Oct 19, 202675,5650200,75637.6%
Oct 16, 202690,5280193,86846.7%
Oct 15, 2026115,7781208,93155.4%
Oct 14, 2026113,77940224,09050.8%
Oct 13, 202668,704269153,01844.9%
Oct 12, 202659,724611132,19845.2%
Oct 9, 202673,282391232,39631.5%
Oct 8, 2026114,3361274,89941.6%
Oct 7, 2026126,29719239,43052.7%
Oct 6, 2026163,6510373,10343.9%
Oct 5, 2026144,0611,107248,42958.0%
Oct 2, 202687,1150225,43038.6%
Oct 1, 202669,979301211,39333.1%
Sep 30, 2026104,3060212,55449.1%

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 LH
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 19, 2026T11,029,36441,781472,15612,43168.6%
Oct 12, 2026T1774,22333,765301,63611,46972.0%
Oct 5, 2026T11,177,65643,391412,21612,24674.1%
Sep 28, 2026T1932,38943,764385,44011,67070.8%
Sep 21, 2026T11,639,48056,535435,91713,92579.0%
Sep 14, 2026T11,248,71647,129495,86713,31271.6%
Sep 7, 2026T11,406,12046,640374,85411,82079.0%
Aug 31, 2026T1842,52441,854475,14612,77263.9%
Aug 24, 2026T11,108,29841,532343,92612,43776.3%
Aug 17, 2026T11,177,79853,865349,28512,30777.1%
Aug 10, 2026T1744,04235,222270,41810,19673.3%
Aug 3, 2026T1910,25640,595371,84112,68271.0%