Skip to main content
Livermore
Livermore
US stocksTW
ZHEN

Standard Biotools Inc.

LAB
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001162194

In the last 90 days, Standard Biotools Inc. insiders filed 1 open-market purchase and 0 sales; 143 institutions reported holding it in 13F filings for Q2 2026, worth $243.6M in total; Viking Global Investors 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
2.17M
Shares, settlement Oct 30, 2026
Change
−275.9K
−11.3% vs. Oct 15, 2026
Days to cover
3.07
Short interest ÷ average daily volume
Average daily volume
706.8K
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 19,540,970 sharesNov 15, 2024: 14,682,662 sharesNov 29, 2024: 13,767,237 sharesDec 13, 2024: 13,310,534 sharesDec 31, 2024: 13,523,264 sharesJan 15, 2025: 13,324,142 sharesJan 31, 2025: 12,849,731 sharesFeb 14, 2025: 13,495,961 sharesFeb 28, 2025: 14,165,972 sharesMar 14, 2025: 15,728,051 sharesMar 31, 2025: 17,683,207 sharesApr 15, 2025: 17,261,965 sharesApr 30, 2025: 18,440,306 sharesMay 15, 2025: 17,493,417 sharesMay 30, 2025: 17,042,645 sharesJun 13, 2025: 16,159,588 sharesJun 30, 2025: 12,873,448 sharesJul 15, 2025: 12,335,128 sharesJul 31, 2025: 12,009,245 sharesAug 15, 2025: 12,538,712 sharesAug 29, 2025: 12,169,060 sharesSep 15, 2025: 11,992,813 sharesSep 30, 2025: 12,049,852 sharesOct 15, 2025: 11,839,646 sharesOct 31, 2025: 11,453,426 sharesNov 14, 2025: 11,856,210 sharesNov 28, 2025: 10,921,071 sharesDec 15, 2025: 10,478,841 sharesDec 31, 2025: 10,301,667 sharesJan 15, 2026: 10,191,929 sharesJan 30, 2026: 9,788,254 sharesFeb 13, 2026: 10,493,665 sharesFeb 27, 2026: 10,159,609 sharesMar 13, 2026: 8,281,198 sharesMar 31, 2026: 10,319,954 sharesApr 15, 2026: 8,479,342 sharesApr 30, 2026: 11,821,128 sharesMay 15, 2026: 12,920,309 sharesMay 29, 2026: 13,127,631 sharesJun 15, 2026: 10,029,339 sharesJun 30, 2026: 3,425,003 sharesJul 15, 2026: 2,213,551 sharesJul 31, 2026: 2,694,489 sharesAug 14, 2026: 2,405,258 sharesAug 31, 2026: 2,979,028 sharesSep 15, 2026: 2,593,308 sharesSep 30, 2026: 2,520,686 sharesOct 15, 2026: 2,445,793 sharesOct 30, 2026: 2,169,887 shares
Short interest in LAB by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 20262.17M−275.9K−11.3%706.8K3.07
Oct 15, 20262.45M−74.9K−3.0%979.9K2.50
Sep 30, 20262.52M−72.6K−2.8%925.5K2.72
Sep 15, 20262.59M−385.7K−13.0%1.80M1.44
Aug 31, 20262.98M+573.8K+23.9%1.70M1.75
Aug 14, 20262.41M−289.2K−10.7%1.11M2.16
Jul 31, 20262.69M+480.9K+21.7%2.02M1.34
Jul 15, 20262.21M−1.21M−35.4%3.06M1.00
Jun 30, 20263.43M−6.60M−65.9%6.85M1.00
Jun 15, 202610.0M−3.10M−23.6%4.95M2.03
May 29, 202613.1M+207.3K+1.6%2.22M5.91
May 15, 202612.9M+1.10M+9.3%1.85M6.99
Apr 30, 202611.8M+3.34M+39.4%2.78M4.25
Apr 15, 20268.48M−1.84M−17.8%3.56M2.38
Mar 31, 202610.3M+2.04M+24.6%1.85M5.59
Mar 13, 20268.28M−1.88M−18.5%3.27M2.54
Feb 27, 202610.2M−334.1K−3.2%1.71M5.94
Feb 13, 202610.5M+705.4K+7.2%1.31M8.03
Jan 30, 20269.79M−403.7K−4.0%1.06M9.20
Jan 15, 202610.2M−109.7K−1.1%1.95M5.24
Dec 31, 202510.3M−177.2K−1.7%1.67M6.16
Dec 15, 202510.5M−442.2K−4.1%1.22M8.62
Nov 28, 202510.9M−935.1K−7.9%2.80M3.90
Nov 14, 202511.9M+402.8K+3.5%1.62M7.30
Oct 31, 202511.5M−386.2K−3.3%1.79M6.39
Oct 15, 202511.8M−210.2K−1.7%1.37M8.64
Sep 30, 202512.0M+57.0K+0.5%1.20M10.07
Sep 15, 202512.0M−176.2K−1.5%1.20M9.98
Aug 29, 202512.2M−369.7K−3.0%1.16M10.50
Aug 15, 202512.5M+529.5K+4.4%1.19M10.52
Jul 31, 202512.0M−325.9K−2.6%1.54M7.78
Jul 15, 202512.3M−538.3K−4.2%1.65M7.45
Jun 30, 202512.9M−3.29M−20.3%4.07M3.17
Jun 13, 202516.2M−883.1K−5.2%955.8K16.91
May 30, 202517.0M−450.8K−2.6%1.60M10.63
May 15, 202517.5M−946.9K−5.1%1.56M11.21
Apr 30, 202518.4M+1.18M+6.8%782.3K23.57
Apr 15, 202517.3M−421.2K−2.4%1.41M12.24
Mar 31, 202517.7M+1.96M+12.4%1.30M13.61
Mar 14, 202515.7M+1.56M+11.0%2.00M7.87
Feb 28, 202514.2M+670.0K+5.0%2.78M5.10
Feb 14, 202513.5M+646.2K+5.0%1.96M6.90
Jan 31, 202512.8M−474.4K−3.6%1.76M7.31
Jan 15, 202513.3M−199.1K−1.5%1.80M7.39
Dec 31, 202413.5M+212.7K+1.6%1.46M9.27
Dec 13, 202413.3M−456.7K−3.3%1.31M10.18
Nov 29, 202413.8M−915.4K−6.2%2.03M6.77
Nov 15, 202414.7M−4.86M−24.9%2.42M6.07
Oct 31, 202419.5M−1.79M−8.4%2.13M9.19

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 LAB by settlement date
Settlement dateSharesPriceValue
Oct 13, 202650,627$0.66$33.4K
Oct 8, 202676,242$0.68$51.8K
Sep 17, 2026463$0.71$328.73
Sep 15, 202611$0.70$7.7
Sep 11, 2026228$0.69$157.32
Sep 9, 202667$0.69$46.23
Sep 8, 20265,132$0.69$3.54K
Aug 31, 20267,767$0.64$4.97K
Aug 13, 2026800$0.79$632
Aug 11, 20262$0.79$1.58
Aug 5, 20261,003$0.82$822.46
Aug 4, 20264,000$0.87$3.48K
Aug 3, 20267$0.87$6.09
Jul 31, 2026320$0.90$288
Jul 30, 2026320$0.87$278.4
Jun 26, 202631,325$0.74$23.2K
Jun 22, 202639,634$0.83$32.9K
Jun 18, 202624,924$0.81$20.2K
Jun 17, 202657,667$0.83$47.9K
Jun 16, 2026160$0.85$136
Jun 15, 20261,429$0.89$1.27K
Jun 12, 2026228$0.91$207.48
Jun 10, 202621,277$0.89$18.9K
Jun 5, 20263,839$1.27$4.88K
Jun 4, 20262,611$1.14$2.98K
May 28, 2026686$1.06$727.16
May 19, 202666,657$0.99$66.0K
May 18, 202655,907$0.98$54.8K
May 15, 20266,686$1.00$6.69K
May 14, 2026224,733$1.01$227.0K

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 LAB by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 202658,1373,071188,23430.9%
Nov 9, 2026135,1570434,75831.1%
Nov 6, 2026111,8243,897551,28620.3%
Nov 5, 202674,6730332,83622.4%
Nov 4, 202687,9420522,64116.8%
Nov 3, 2026155,8860599,88726.0%
Nov 2, 2026244,9070753,29632.5%
Oct 30, 2026120,7594,359561,96721.5%
Oct 29, 202670,6430156,59945.1%
Oct 28, 202650,1420309,68216.2%
Oct 27, 2026116,6380541,01621.6%
Oct 26, 2026155,4600335,50546.3%
Oct 23, 2026148,6216,400390,13638.1%
Oct 22, 2026130,7680576,68922.7%
Oct 21, 2026133,8960206,07465.0%
Oct 20, 2026128,4940179,76371.5%
Oct 19, 2026113,4490151,59674.8%
Oct 16, 2026372,2590427,67387.0%
Oct 15, 2026178,2330306,50358.2%
Oct 14, 202666,5520177,95837.4%
Oct 13, 2026159,2230228,63169.6%
Oct 12, 2026227,2250309,53773.4%
Oct 9, 2026139,7180357,53639.1%
Oct 8, 2026497,3620861,66257.7%
Oct 7, 2026287,1730720,32839.9%
Oct 6, 2026285,7480733,63538.9%
Oct 5, 2026298,81715,900616,07748.5%
Oct 2, 2026108,762524403,82026.9%
Oct 1, 2026321,9410631,77251.0%
Sep 30, 2026549,5076001,113,21049.4%

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 LAB
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T21,104,6536,5092,211,0062,51633.3%
Sep 28, 2026T2562,0836,1472,006,4402,88821.9%
Sep 21, 2026T2617,0787,2921,391,6662,59030.7%
Sep 14, 2026T2895,0557,3762,517,2622,20926.2%
Sep 7, 2026T22,146,9469,0962,971,4763,22141.9%
Aug 31, 2026T22,197,59617,5694,712,6063,57631.8%
Aug 24, 2026T21,576,59011,7441,989,7073,13344.2%
Aug 17, 2026T22,151,52018,6372,932,7773,85842.3%
Aug 10, 2026T21,605,70710,5281,256,6612,01456.1%
Aug 3, 2026T21,559,58312,9122,237,5292,51241.1%
Jul 27, 2026T22,365,10419,2207,487,1275,32924.0%
Jul 20, 2026T21,293,52213,2183,977,1383,90024.5%