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Parabilis Medicines, Inc.

PBLS
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001657677

No open-market purchases or sales by Parabilis Medicines, Inc. insiders were filed in the last 90 days; 79 institutions reported holding it in 13F filings for Q2 2026, worth $2.71B 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
9.25M
Shares, settlement Oct 15, 2026
Change
+988.6K
+12.0% vs. Sep 30, 2026
Days to cover
9.50
Short interest ÷ average daily volume
Average daily volume
974.2K
Shares, as reported by FINRA
Short interest by settlement date
Jun 15, 2026: 1,116,504 sharesJun 30, 2026: 2,769,824 sharesJul 15, 2026: 3,954,390 sharesJul 31, 2026: 5,117,574 sharesAug 14, 2026: 5,257,000 sharesAug 31, 2026: 5,517,704 sharesSep 15, 2026: 6,092,212 sharesSep 30, 2026: 8,261,483 sharesOct 15, 2026: 9,250,099 shares
Short interest in PBLS by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 15, 20269.25M+988.6K+12.0%974.2K9.50
Sep 30, 20268.26M+2.17M+35.6%1.71M4.84
Sep 15, 20266.09M+574.5K+10.4%459.7K13.25
Aug 31, 20265.52M+260.7K+5.0%388.6K14.20
Aug 14, 20265.26M+139.4K+2.7%334.1K15.74
Jul 31, 20265.12M+1.16M+29.4%399.2K12.82
Jul 15, 20263.95M+1.18M+42.8%476.7K8.30
Jun 30, 20262.77M+1.65M+148.1%1.07M2.59
Jun 15, 20261.12M+1.12M+100.0%838.6K1.33

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 PBLS by settlement date
Settlement dateSharesPriceValue
Oct 14, 20269,123$26.85$245.0K
Oct 9, 202616,102$28.09$452.3K
Oct 7, 202617$28.86$490.62
Sep 30, 2026768$31.91$24.5K
Sep 28, 20261,314$31.20$41.0K
Sep 23, 202698$38.17$3.74K
Sep 21, 2026105,755$41.73$4.41M
Sep 18, 20267,591$40.88$310.3K
Sep 17, 20261,874$36.88$69.1K
Sep 16, 20269,808$35.72$350.3K
Sep 15, 2026733$36.16$26.5K
Sep 14, 2026100$36.88$3.69K
Sep 11, 20264,363$36.32$158.5K
Sep 3, 2026245$40.11$9.83K
Aug 31, 202617$39.11$664.87
Aug 28, 20262,285$39.29$89.8K
Aug 24, 2026923$39.36$36.3K
Aug 20, 2026417$41.32$17.2K
Aug 17, 2026226$37.07$8.38K
Aug 13, 20262,075$37.41$77.6K
Aug 12, 20263,382$36.47$123.3K
Aug 11, 2026330$35.73$11.8K
Aug 7, 20262,684$35.58$95.5K
Aug 5, 20266,531$35.90$234.5K
Aug 4, 20261,325$33.96$45.0K
Aug 3, 20265,227$33.98$177.6K
Jul 31, 20261,625$32.28$52.5K
Jul 29, 20261,128$31.96$36.1K
Jul 27, 20266$31.28$187.68
Jul 24, 2026261$32.81$8.56K

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 PBLS by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 9, 2026240,1840400,33160.0%
Nov 6, 2026169,2380225,72175.0%
Nov 5, 2026278,6510303,29291.9%
Nov 4, 2026311,4160362,80485.8%
Nov 3, 2026162,1480180,73689.7%
Nov 2, 2026226,4770252,06389.8%
Oct 30, 2026298,6820312,47195.6%
Oct 29, 2026327,6050365,36789.7%
Oct 28, 2026425,4180508,86183.6%
Oct 27, 2026396,9990729,14054.4%
Oct 26, 2026530,08116,170700,28575.7%
Oct 23, 2026571,2777,393617,60792.5%
Oct 22, 2026361,1890381,08494.8%
Oct 21, 2026580,4330661,72287.7%
Oct 20, 2026678,2190797,39485.1%
Oct 19, 2026806,84715,674904,43489.2%
Oct 16, 2026371,7990438,57184.8%
Oct 15, 2026315,0350438,29671.9%
Oct 14, 2026313,7840327,47395.8%
Oct 13, 2026608,9471627,60397.0%
Oct 12, 2026717,0780733,59897.7%
Oct 9, 2026544,7300550,68798.9%
Oct 8, 2026534,4180843,80263.3%
Oct 7, 2026562,1751,376588,63195.5%
Oct 6, 2026306,5090436,80370.2%
Oct 5, 2026219,0660255,28985.8%
Oct 2, 2026347,0170377,98691.8%
Oct 1, 2026303,1710361,54583.9%
Sep 30, 2026140,8300162,90286.5%
Sep 29, 2026147,4210229,37764.3%

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 PBLS
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T22,190,37223,241653,5584,31177.0%
Sep 28, 2026T21,167,26326,186510,6854,73769.6%
Sep 21, 2026T22,201,76330,624742,4136,04174.8%
Sep 14, 2026T21,665,20527,3642,450,3573,50540.5%
Sep 7, 2026T2691,05516,020176,6971,76679.6%
Aug 31, 2026T2761,73013,964344,1062,22168.9%
Aug 24, 2026T2650,77113,634190,7582,28977.3%
Aug 17, 2026T2961,61515,031180,1962,82184.2%
Aug 10, 2026T2468,08612,619210,8001,96768.9%
Aug 3, 2026T2676,69014,117155,4722,29381.3%
Jul 27, 2026T2559,32810,060168,2251,53076.9%
Jul 20, 2026T2696,20610,214300,8071,97169.8%