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Tenax Therapeutics, Inc.

TENX
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0000034956

In the last 90 days, Tenax Therapeutics, Inc. insiders filed 7 open-market purchases and 0 sales; 111 institutions reported holding it in 13F filings for Q2 2026, worth $441.4M 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
5.82M
Shares, settlement Oct 30, 2026
Change
−1.41M
−19.5% vs. Oct 15, 2026
Days to cover
3.17
Short interest ÷ average daily volume
Average daily volume
1.83M
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 105,757 sharesNov 15, 2024: 120,866 sharesNov 29, 2024: 130,638 sharesDec 13, 2024: 204,516 sharesDec 31, 2024: 218,179 sharesJan 15, 2025: 222,915 sharesJan 31, 2025: 217,185 sharesFeb 14, 2025: 419,502 sharesFeb 28, 2025: 381,701 sharesMar 14, 2025: 373,494 sharesMar 31, 2025: 364,345 sharesApr 15, 2025: 336,098 sharesApr 30, 2025: 308,330 sharesMay 15, 2025: 310,315 sharesMay 30, 2025: 310,524 sharesJun 13, 2025: 311,356 sharesJun 30, 2025: 337,020 sharesJul 15, 2025: 336,435 sharesJul 31, 2025: 334,559 sharesAug 15, 2025: 326,898 sharesAug 29, 2025: 297,718 sharesSep 15, 2025: 275,372 sharesSep 30, 2025: 553,719 sharesOct 15, 2025: 754,325 sharesOct 31, 2025: 762,345 sharesNov 14, 2025: 758,227 sharesNov 28, 2025: 600,469 sharesDec 15, 2025: 531,101 sharesDec 31, 2025: 93,087 sharesJan 15, 2026: 196,421 sharesJan 30, 2026: 119,746 sharesFeb 13, 2026: 124,196 sharesFeb 27, 2026: 120,380 sharesMar 13, 2026: 152,873 sharesMar 31, 2026: 172,743 sharesApr 15, 2026: 194,456 sharesApr 30, 2026: 730,696 sharesMay 15, 2026: 775,851 sharesMay 29, 2026: 792,041 sharesJun 15, 2026: 767,532 sharesJun 30, 2026: 1,787,937 sharesJul 15, 2026: 2,046,537 sharesJul 31, 2026: 2,556,478 sharesAug 14, 2026: 5,473,983 sharesAug 31, 2026: 9,276,905 sharesSep 15, 2026: 5,503,842 sharesSep 30, 2026: 7,182,126 sharesOct 15, 2026: 7,229,252 sharesOct 30, 2026: 5,817,363 shares
Short interest in TENX by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 20265.82M−1.41M−19.5%1.83M3.17
Oct 15, 20267.23M+47.1K+0.7%2.25M3.22
Sep 30, 20267.18M+1.68M+30.5%3.06M2.35
Sep 15, 20265.50M−3.77M−40.7%5.35M1.03
Aug 31, 20269.28M+3.80M+69.5%8.25M1.12
Aug 14, 20265.47M+2.92M+114.1%13.4M1.00
Jul 31, 20262.56M+509.9K+24.9%1.37M1.86
Jul 15, 20262.05M+258.6K+14.5%1.49M1.37
Jun 30, 20261.79M+1.02M+133.0%1.51M1.19
Jun 15, 2026767.5K−24.5K−3.1%941.2K1.00
May 29, 2026792.0K+16.2K+2.1%443.3K1.79
May 15, 2026775.9K+45.2K+6.2%693.5K1.12
Apr 30, 2026730.7K+536.2K+275.8%639.9K1.14
Apr 15, 2026194.5K+21.7K+12.6%525.0K1.00
Mar 31, 2026172.7K+19.9K+13.0%371.6K1.00
Mar 13, 2026152.9K+32.5K+27.0%491.0K1.00
Feb 27, 2026120.4K−3.82K−3.1%207.8K1.00
Feb 13, 2026124.2K+4.45K+3.7%157.3K1.00
Jan 30, 2026119.7K−76.7K−39.0%255.6K1.00
Jan 15, 2026196.4K+103.3K+111.0%445.7K1.00
Dec 31, 202593.1K−438.0K−82.5%206.1K1.00
Dec 15, 2025531.1K−69.4K−11.6%186.8K2.84
Nov 28, 2025600.5K−157.8K−20.8%133.4K4.50
Nov 14, 2025758.2K−4.12K−0.5%39.1K19.39
Oct 31, 2025762.3K+8.02K+1.1%86.5K8.81
Oct 15, 2025754.3K+200.6K+36.2%106.2K7.11
Sep 30, 2025553.7K+278.3K+101.1%163.1K3.40
Sep 15, 2025275.4K−22.3K−7.5%50.0K5.50
Aug 29, 2025297.7K−29.2K−8.9%18.2K16.38
Aug 15, 2025326.9K−7.66K−2.3%12.6K26.00
Jul 31, 2025334.6K−1.88K−0.6%34.0K9.83
Jul 15, 2025336.4K−585−0.2%8.57K39.25
Jun 30, 2025337.0K+25.7K+8.2%71.8K4.69
Jun 13, 2025311.4K+832+0.3%16.3K19.15
May 30, 2025310.5K+209+0.1%9.97K31.15
May 15, 2025310.3K+1.99K+0.6%10.3K30.26
Apr 30, 2025308.3K−27.8K−8.3%15.0K20.57
Apr 15, 2025336.1K−28.2K−7.8%17.2K19.54
Mar 31, 2025364.3K−9.15K−2.5%25.9K14.07
Mar 14, 2025373.5K−8.21K−2.2%59.6K6.26
Feb 28, 2025381.7K−37.8K−9.0%27.7K13.80
Feb 14, 2025419.5K+202.3K+93.2%68.7K6.10
Jan 31, 2025217.2K−5.73K−2.6%23.6K9.18
Jan 15, 2025222.9K+4.74K+2.2%33.5K6.66
Dec 31, 2024218.2K+13.7K+6.7%42.7K5.11
Dec 13, 2024204.5K+73.9K+56.6%82.5K2.48
Nov 29, 2024130.6K+9.77K+8.1%56.7K2.31
Nov 15, 2024120.9K+15.1K+14.3%61.0K1.98
Oct 31, 2024105.8K+84.7K+403.0%113.2K1.00

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 TENX by settlement date
Settlement dateSharesPriceValue
Oct 13, 2026292$1.83$534.36
Oct 8, 20262,180$1.91$4.16K
Oct 7, 2026350$1.93$675.5
Oct 5, 20261,827$1.98$3.62K
Oct 2, 2026459$1.93$885.87
Sep 24, 20261,409$1.90$2.68K
Sep 18, 20261,182$1.86$2.20K
Sep 4, 202679,342$1.78$141.2K
Sep 2, 2026466,064$1.80$838.9K
Aug 27, 2026163$2.12$345.56
Aug 26, 20264,396$2.32$10.2K
Aug 25, 202645$1.85$83.25
Aug 24, 20262,716$1.75$4.75K
Aug 21, 20263,785$1.78$6.74K
Aug 20, 202616,858$1.90$32.0K
Aug 19, 20261,027,432$1.70$1.75M
Aug 18, 20264,636$1.71$7.93K
Aug 14, 2026911$1.83$1.67K
Aug 12, 20265,766$1.62$9.34K
Aug 11, 2026825,289$1.38$1.14M
Aug 5, 202620$13.82$276.4
Aug 4, 20263,521$14.33$50.5K
Jul 17, 2026810$15.08$12.2K
Jul 14, 2026131$15.98$2.09K
Jun 29, 202614,189$13.44$190.7K
Jun 26, 202613$12.89$167.57
Jun 15, 2026237,037$11.48$2.72M
Jun 10, 202614,000$10.73$150.2K
Jun 9, 202650,361$10.54$530.8K
Jun 8, 202663,205$10.73$678.2K

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 TENX by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 11, 2026144,8731,917434,46033.3%
Nov 10, 2026345,4412,089444,80677.7%
Nov 9, 2026173,2191,500555,87131.2%
Nov 6, 2026153,62246,662300,95551.0%
Nov 5, 2026411,34828,981756,32354.4%
Nov 4, 2026346,3460637,56254.3%
Nov 3, 2026760,9821051,296,22758.7%
Nov 2, 2026414,5276,000646,85164.1%
Oct 30, 2026196,3463,171381,62351.5%
Oct 29, 2026573,2293,3671,416,05040.5%
Oct 28, 2026338,7571,950642,49652.7%
Oct 27, 2026270,827373591,47545.8%
Oct 26, 2026357,2592,229532,48167.1%
Oct 23, 2026263,314150394,66366.7%
Oct 22, 2026641,0338,1591,470,44643.6%
Oct 21, 2026362,3501,000654,46855.4%
Oct 20, 2026446,221192737,64060.5%
Oct 19, 2026645,6402,2991,248,66251.7%
Oct 16, 2026447,4163,576870,80051.4%
Oct 15, 2026293,8012,048768,03238.3%
Oct 14, 2026426,87050,253796,23953.6%
Oct 13, 20261,312,374130,9823,380,78838.8%
Oct 12, 2026131,3345378,98934.7%
Oct 9, 2026383,2561,0421,009,48138.0%
Oct 8, 2026395,2872,462982,57840.2%
Oct 7, 2026164,42310,514416,48539.5%
Oct 6, 2026283,3640545,02352.0%
Oct 5, 2026304,445447724,78142.0%
Oct 2, 2026520,3943001,023,69650.8%
Oct 1, 2026408,1982,6001,014,78240.2%

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 TENX
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T21,295,1786,0972,608,9834,43333.2%
Sep 28, 2026T22,123,65210,7375,243,7697,81728.8%
Sep 21, 2026T22,133,57611,9364,408,8967,29632.6%
Sep 14, 2026T22,701,44416,3545,854,5779,33431.6%
Sep 7, 2026T23,531,46117,8109,744,32915,47426.6%
Aug 31, 2026T25,564,03030,17720,545,40621,70321.3%
Aug 24, 2026T23,535,56419,36015,028,16136,00219.0%
Aug 17, 2026T24,792,66527,43719,568,51721,68719.7%
Aug 10, 2026T216,731,87989,26965,413,441106,14820.4%
Aug 3, 2026T22,489,54933,6642,084,5466,08854.4%
Jul 27, 2026T22,531,47729,0251,082,6204,63370.0%
Jul 20, 2026T21,999,33223,5651,009,1094,31166.5%