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Shattuck Labs, Inc.

STTK
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001680367

No open-market purchases or sales by Shattuck Labs, Inc. insiders were filed in the last 90 days; 100 institutions reported holding it in 13F filings for Q2 2026, worth $581.3M in total; no superinvestor holds 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
10.7M
Shares, settlement Oct 30, 2026
Change
+305.4K
+2.9% vs. Oct 15, 2026
Days to cover
11.97
Short interest ÷ average daily volume
Average daily volume
898.1K
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 2,192,022 sharesNov 15, 2024: 2,122,726 sharesNov 29, 2024: 2,098,173 sharesDec 13, 2024: 1,957,498 sharesDec 31, 2024: 2,039,133 sharesJan 15, 2025: 2,196,863 sharesJan 31, 2025: 1,933,707 sharesFeb 14, 2025: 1,916,536 sharesFeb 28, 2025: 1,687,577 sharesMar 14, 2025: 1,675,741 sharesMar 31, 2025: 1,663,778 sharesApr 15, 2025: 1,685,625 sharesApr 30, 2025: 1,623,744 sharesMay 15, 2025: 1,705,313 sharesMay 30, 2025: 1,695,633 sharesJun 13, 2025: 1,569,000 sharesJun 30, 2025: 754,834 sharesJul 15, 2025: 502,888 sharesJul 31, 2025: 431,826 sharesAug 15, 2025: 1,275,855 sharesAug 29, 2025: 959,265 sharesSep 15, 2025: 374,045 sharesSep 30, 2025: 417,075 sharesOct 15, 2025: 951,624 sharesOct 31, 2025: 907,696 sharesNov 14, 2025: 892,647 sharesNov 28, 2025: 669,432 sharesDec 15, 2025: 742,537 sharesDec 31, 2025: 1,028,366 sharesJan 15, 2026: 2,198,677 sharesJan 30, 2026: 2,251,778 sharesFeb 13, 2026: 1,921,827 sharesFeb 27, 2026: 1,604,787 sharesMar 13, 2026: 1,579,942 sharesMar 31, 2026: 1,466,321 sharesApr 15, 2026: 1,335,620 sharesApr 30, 2026: 1,415,066 sharesMay 15, 2026: 1,319,679 sharesMay 29, 2026: 1,148,683 sharesJun 15, 2026: 2,539,247 sharesJun 30, 2026: 5,929,245 sharesJul 15, 2026: 7,802,903 sharesJul 31, 2026: 6,394,445 sharesAug 14, 2026: 6,006,320 sharesAug 31, 2026: 5,571,195 sharesSep 15, 2026: 6,808,662 sharesSep 30, 2026: 10,947,042 sharesOct 15, 2026: 10,440,338 sharesOct 30, 2026: 10,745,702 shares
Short interest in STTK by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 202610.7M+305.4K+2.9%898.1K11.97
Oct 15, 202610.4M−506.7K−4.6%1.44M7.24
Sep 30, 202610.9M+4.14M+60.8%1.82M6.01
Sep 15, 20266.81M+1.24M+22.2%812.7K8.38
Aug 31, 20265.57M−435.1K−7.2%733.9K7.59
Aug 14, 20266.01M−388.1K−6.1%1.03M5.81
Jul 31, 20266.39M−1.41M−18.1%1.21M5.30
Jul 15, 20267.80M+1.87M+31.6%1.34M5.84
Jun 30, 20265.93M+3.39M+133.5%2.25M2.64
Jun 15, 20262.54M+1.39M+121.1%1.40M1.81
May 29, 20261.15M−171.0K−13.0%549.1K2.09
May 15, 20261.32M−95.4K−6.7%612.8K2.15
Apr 30, 20261.42M+79.4K+6.0%431.8K3.28
Apr 15, 20261.34M−130.7K−8.9%461.3K2.90
Mar 31, 20261.47M−113.6K−7.2%627.6K2.34
Mar 13, 20261.58M−24.8K−1.6%929.7K1.70
Feb 27, 20261.60M−317.0K−16.5%294.6K5.45
Feb 13, 20261.92M−330.0K−14.7%334.6K5.74
Jan 30, 20262.25M+53.1K+2.4%992.1K2.27
Jan 15, 20262.20M+1.17M+113.8%791.8K2.78
Dec 31, 20251.03M+285.8K+38.5%452.3K2.27
Dec 15, 2025742.5K+73.1K+10.9%519.9K1.43
Nov 28, 2025669.4K−223.2K−25.0%116.6K5.74
Nov 14, 2025892.6K−15.0K−1.7%122.3K7.30
Oct 31, 2025907.7K−43.9K−4.6%185.4K4.89
Oct 15, 2025951.6K+534.5K+128.2%492.9K1.93
Sep 30, 2025417.1K+43.0K+11.5%333.1K1.25
Sep 15, 2025374.0K−585.2K−61.0%2.58M1.00
Aug 29, 2025959.3K−316.6K−24.8%502.1K1.91
Aug 15, 20251.28M+844.0K+195.5%9.26M1.00
Jul 31, 2025431.8K−71.1K−14.1%154.2K2.80
Jul 15, 2025502.9K−251.9K−33.4%284.7K1.77
Jun 30, 2025754.8K−814.2K−51.9%664.9K1.14
Jun 13, 20251.57M−126.6K−7.5%106.8K14.70
May 30, 20251.70M−9.68K−0.6%130.0K13.04
May 15, 20251.71M+81.6K+5.0%79.1K21.56
Apr 30, 20251.62M−61.9K−3.7%132.9K12.22
Apr 15, 20251.69M+21.8K+1.3%467.9K3.60
Mar 31, 20251.66M−12.0K−0.7%92.6K17.96
Mar 14, 20251.68M−11.8K−0.7%120.3K13.93
Feb 28, 20251.69M−229.0K−12.0%358.8K4.70
Feb 14, 20251.92M−17.2K−0.9%104.0K18.43
Jan 31, 20251.93M−263.2K−12.0%125.7K15.39
Jan 15, 20252.20M+157.7K+7.7%122.9K17.88
Dec 31, 20242.04M+81.6K+4.2%226.9K8.99
Dec 13, 20241.96M−140.7K−6.7%440.1K4.45
Nov 29, 20242.10M−24.6K−1.2%247.8K8.47
Nov 15, 20242.12M−69.3K−3.2%354.3K5.99
Oct 31, 20242.19M+15.5K+0.7%352.6K6.22

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 STTK by settlement date
Settlement dateSharesPriceValue
Oct 7, 2026243$5.86$1.42K
Oct 5, 20264,105$6.73$27.6K
Oct 1, 20261,176$6.82$8.02K
Sep 24, 20261,724$6.36$11.0K
Sep 21, 202611,337$6.01$68.1K
Sep 8, 202616,501$6.79$112.0K
Aug 25, 20263,001$7.90$23.7K
Aug 4, 202672$7.29$524.88
Aug 3, 2026289$7.07$2.04K
Jul 31, 2026945$7.19$6.79K
Jul 29, 20263,185$6.82$21.7K
Jul 17, 202645,014$7.07$318.2K
Jul 16, 202651$6.77$345.27
Jul 14, 20262,026$6.43$13.0K
Jul 13, 20261,589$6.64$10.6K
Jul 10, 20261,644$7.03$11.6K
Jul 9, 20262,067$6.88$14.2K
Jul 8, 20262,864$7.26$20.8K
Jul 7, 20261,685$7.24$12.2K
Jul 6, 20261,854$7.05$13.1K
Jul 2, 2026356$6.51$2.32K
Jun 29, 2026151,750$6.44$977.3K
Jun 26, 2026381$5.91$2.25K
Jun 25, 20263,910$6.01$23.5K
Jun 24, 20262,208$5.39$11.9K
Jun 11, 202620,079$4.13$82.9K
May 22, 2026159,756$6.09$972.9K
Feb 2, 202634$3.87$131.58
Dec 16, 20256$3.06$18.36
Dec 12, 2025228$3.23$736.44

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 STTK by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 12, 2026388,5900450,85086.2%
Nov 11, 2026305,4290456,26266.9%
Nov 10, 2026170,2740266,08664.0%
Nov 9, 2026314,8340396,48179.4%
Nov 6, 2026265,23711,863339,39278.2%
Nov 5, 2026388,8907,768520,74674.7%
Nov 4, 2026147,6410241,92261.0%
Nov 3, 2026144,4890419,58234.4%
Nov 2, 2026157,942840215,25873.4%
Oct 30, 2026194,8600354,27555.0%
Oct 29, 202684,2890160,87452.4%
Oct 28, 2026125,4140259,39848.3%
Oct 27, 2026147,0280235,51562.4%
Oct 26, 2026143,5770247,47658.0%
Oct 23, 2026169,3750242,52569.8%
Oct 22, 2026260,6490557,68146.7%
Oct 21, 2026274,3510487,40456.3%
Oct 20, 2026333,2550746,44944.6%
Oct 19, 2026156,9990216,76672.4%
Oct 16, 2026166,9490210,04979.5%
Oct 15, 2026257,8050364,26370.8%
Oct 14, 2026180,4792,466562,56032.1%
Oct 13, 2026510,468173934,54354.6%
Oct 12, 2026285,03856384,82074.1%
Oct 9, 2026266,9840402,13866.4%
Oct 8, 2026367,8213,342839,56043.8%
Oct 7, 2026291,50511,043470,88661.9%
Oct 6, 2026540,3850885,55361.0%
Oct 5, 2026279,0280388,02571.9%
Oct 2, 2026666,94552836,83579.7%

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 STTK
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T21,967,60024,9611,086,1134,55664.4%
Sep 28, 2026T22,469,42932,7771,740,3554,88758.7%
Sep 21, 2026T21,325,79325,037846,4154,51261.0%
Sep 14, 2026T21,021,01627,4071,755,2373,14636.8%
Sep 7, 2026T2991,97624,650416,6763,20170.4%
Aug 31, 2026T2807,29617,358332,6483,19970.8%
Aug 24, 2026T21,214,66730,338842,8373,49459.0%
Aug 17, 2026T2627,56819,117306,9952,58067.2%
Aug 10, 2026T21,256,90423,2921,002,5783,46055.6%
Aug 3, 2026T21,212,60027,989821,3433,12659.6%
Jul 27, 2026T2877,98521,928498,1243,22863.8%
Jul 20, 2026T21,508,89121,406776,3573,31166.0%