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Jasper Therapeutics, Inc.

JSPR
Exchange
Nasdaq
Industry
Biological Products, (No Diagnostic Substances)
SEC CIK
0001788028

No open-market purchases or sales by Jasper Therapeutics, Inc. insiders were filed in the last 90 days; 45 institutions reported holding it in 13F filings for Q2 2026, worth $5.05M 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
6.47M
Shares, settlement Oct 15, 2026
Change
+256.1K
+4.1% vs. Sep 30, 2026
Days to cover
18.53
Short interest ÷ average daily volume
Average daily volume
349.4K
Shares, as reported by FINRA
Short interest by settlement date
Oct 15, 2024: 1,809,935 sharesOct 31, 2024: 1,755,785 sharesNov 15, 2024: 1,938,630 sharesNov 29, 2024: 2,055,404 sharesDec 13, 2024: 2,073,310 sharesDec 31, 2024: 2,317,294 sharesJan 15, 2025: 3,215,172 sharesJan 31, 2025: 2,718,649 sharesFeb 14, 2025: 2,500,941 sharesFeb 28, 2025: 2,076,215 sharesMar 14, 2025: 1,668,204 sharesMar 31, 2025: 1,870,350 sharesApr 15, 2025: 1,787,909 sharesApr 30, 2025: 1,729,447 sharesMay 15, 2025: 1,744,284 sharesMay 30, 2025: 1,726,438 sharesJun 13, 2025: 1,542,695 sharesJun 30, 2025: 1,289,117 sharesJul 15, 2025: 1,355,502 sharesJul 31, 2025: 1,288,779 sharesAug 15, 2025: 1,226,019 sharesAug 29, 2025: 1,120,087 sharesSep 15, 2025: 1,161,897 sharesSep 30, 2025: 1,511,116 sharesOct 15, 2025: 1,547,641 sharesOct 31, 2025: 1,525,711 sharesNov 14, 2025: 1,508,904 sharesNov 28, 2025: 1,831,825 sharesDec 15, 2025: 3,455,246 sharesDec 31, 2025: 3,224,369 sharesJan 15, 2026: 3,643,903 sharesJan 30, 2026: 3,559,637 sharesFeb 13, 2026: 3,433,577 sharesFeb 27, 2026: 3,340,380 sharesMar 13, 2026: 3,120,042 sharesMar 31, 2026: 3,015,156 sharesApr 15, 2026: 2,730,146 sharesApr 30, 2026: 2,719,374 sharesMay 15, 2026: 2,487,193 sharesMay 29, 2026: 2,246,874 sharesJun 15, 2026: 1,958,290 sharesJun 30, 2026: 1,703,161 sharesJul 15, 2026: 1,661,803 sharesJul 31, 2026: 4,311,877 sharesAug 14, 2026: 5,358,334 sharesAug 31, 2026: 5,492,117 sharesSep 15, 2026: 5,808,274 sharesSep 30, 2026: 6,218,239 sharesOct 15, 2026: 6,474,345 shares
Short interest in JSPR by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 15, 20266.47M+256.1K+4.1%349.4K18.53
Sep 30, 20266.22M+410.0K+7.1%381.6K16.30
Sep 15, 20265.81M+316.2K+5.8%353.4K16.43
Aug 31, 20265.49M+133.8K+2.5%714.5K7.69
Aug 14, 20265.36M+1.05M+24.3%690.5K7.76
Jul 31, 20264.31M+2.65M+159.5%4.58M1.00
Jul 15, 20261.66M−41.4K−2.4%882.1K1.88
Jun 30, 20261.70M−255.1K−13.0%623.1K2.73
Jun 15, 20261.96M−288.6K−12.8%957.3K2.05
May 29, 20262.25M−240.3K−9.7%236.2K9.51
May 15, 20262.49M−232.2K−8.5%242.6K10.25
Apr 30, 20262.72M−10.8K−0.4%352.9K7.71
Apr 15, 20262.73M−285.0K−9.5%819.2K3.33
Mar 31, 20263.02M−104.9K−3.4%357.2K8.44
Mar 13, 20263.12M−220.3K−6.6%416.6K7.49
Feb 27, 20263.34M−93.2K−2.7%265.6K12.58
Feb 13, 20263.43M−126.1K−3.5%567.1K6.05
Jan 30, 20263.56M−84.3K−2.3%502.6K7.08
Jan 15, 20263.64M+419.5K+13.0%1.45M2.51
Dec 31, 20253.22M−230.9K−6.7%706.8K4.56
Dec 15, 20253.46M+1.62M+88.6%6.40M1.00
Nov 28, 20251.83M+322.9K+21.4%371.4K4.93
Nov 14, 20251.51M−16.8K−1.1%447.9K3.37
Oct 31, 20251.53M−21.9K−1.4%372.8K4.09
Oct 15, 20251.55M+36.5K+2.4%431.6K3.59
Sep 30, 20251.51M+349.2K+30.1%510.9K2.96
Sep 15, 20251.16M+41.8K+3.7%161.2K7.21
Aug 29, 20251.12M−105.9K−8.6%144.1K7.77
Aug 15, 20251.23M−62.8K−4.9%284.3K4.31
Jul 31, 20251.29M−66.7K−4.9%335.4K3.84
Jul 15, 20251.36M+66.4K+5.2%2.44M1.00
Jun 30, 20251.29M−253.6K−16.4%471.0K2.74
Jun 13, 20251.54M−183.7K−10.6%242.1K6.37
May 30, 20251.73M−17.8K−1.0%217.1K7.95
May 15, 20251.74M+14.8K+0.9%158.4K11.01
Apr 30, 20251.73M−58.5K−3.3%156.6K11.04
Apr 15, 20251.79M−82.4K−4.4%187.7K9.52
Mar 31, 20251.87M+202.1K+12.1%202.1K9.26
Mar 14, 20251.67M−408.0K−19.7%310.2K5.38
Feb 28, 20252.08M−424.7K−17.0%360.2K5.76
Feb 14, 20252.50M−217.7K−8.0%424.3K5.89
Jan 31, 20252.72M−496.5K−15.4%546.1K4.98
Jan 15, 20253.22M+897.9K+38.8%1.56M2.06
Dec 31, 20242.32M+244.0K+11.8%208.8K11.10
Dec 13, 20242.07M+17.9K+0.9%174.7K11.87
Nov 29, 20242.06M+116.8K+6.0%177.7K11.57
Nov 15, 20241.94M+182.8K+10.4%241.9K8.01
Oct 31, 20241.76M−54.1K−3.0%358.3K4.90
Oct 15, 20241.81M+315.6K+21.1%359.3K5.04

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 JSPR by settlement date
Settlement dateSharesPriceValue
Oct 14, 20262,313$0.50$1.16K
Oct 13, 202624,086$0.56$13.5K
Oct 9, 202620,289$0.56$11.4K
Oct 8, 202615,823$0.57$9.02K
Oct 7, 2026251$0.56$140.56
Oct 6, 20267,248$0.59$4.28K
Oct 5, 20261,554$0.57$885.78
Oct 2, 20266,397$0.60$3.84K
Oct 1, 202637,046$0.58$21.5K
Sep 30, 202694,235$0.63$59.4K
Sep 29, 20268,768$0.63$5.52K
Sep 28, 202617,299$0.61$10.6K
Sep 25, 202629,693$0.59$17.5K
Sep 24, 202624,303$0.57$13.9K
Sep 22, 2026324$0.60$194.4
Sep 21, 20269,913$0.62$6.15K
Sep 18, 202628,790$0.63$18.1K
Sep 17, 202610,097$0.58$5.86K
Sep 8, 20266,920$0.71$4.91K
Aug 28, 20265,735$0.70$4.01K
Aug 26, 2026333$0.72$239.76
Aug 20, 20268,988$0.75$6.74K
Aug 18, 202635,631$0.84$29.9K
Aug 17, 202652,878$0.79$41.8K
Aug 14, 202638,041$0.86$32.7K
Aug 13, 202656,167$0.82$46.1K
Aug 12, 202619,284$0.89$17.2K
Aug 11, 20266,196$0.80$4.96K
Aug 10, 2026171,222$0.71$121.6K
Aug 7, 20261,097$0.65$713.05

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 JSPR by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 9, 20268,21678216,17150.8%
Nov 6, 202612,1223,75933,22636.5%
Nov 5, 202634,7328,107213,54116.3%
Nov 4, 2026128,1150308,22841.6%
Nov 3, 202617,3580103,56016.8%
Nov 2, 202646,3810271,26417.1%
Oct 30, 2026122,051421192,47763.4%
Oct 29, 202693,69624,288165,44156.6%
Oct 28, 202680,1204,928201,39739.8%
Oct 27, 2026180,55327,016348,38651.8%
Oct 26, 2026138,406133159,83586.6%
Oct 23, 202635,78510091,09239.3%
Oct 22, 202619,522025,28577.2%
Oct 21, 2026100,5670156,50664.3%
Oct 20, 2026102,0850134,98675.6%
Oct 19, 202663,8051,076167,27238.1%
Oct 16, 202649,12570087,17856.4%
Oct 15, 2026124,493209155,73279.9%
Oct 14, 2026178,97514,957300,62359.5%
Oct 13, 202684,1365,164126,12966.7%
Oct 12, 2026117,8551133,07888.6%
Oct 9, 202696,7702,261106,17191.1%
Oct 8, 202647,03220165,05572.3%
Oct 7, 2026124,080363161,80276.7%
Oct 6, 202671,147217117,03760.8%
Oct 5, 2026191,263206226,62484.4%
Oct 2, 202642,08720673,01157.6%
Oct 1, 202654,8320105,35252.0%
Sep 30, 2026154,9520207,75674.6%
Sep 29, 2026180,3940258,16169.9%

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 JSPR
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T2175,8801,221542,3351,14324.5%
Sep 28, 2026T2503,7525,549381,10799056.9%
Sep 21, 2026T2188,5141,327484,8491,02628.0%
Sep 14, 2026T2402,9711,407471,88888746.1%
Sep 7, 2026T2124,646618249,4181,10133.3%
Aug 31, 2026T2698,7322,603665,8611,88751.2%
Aug 24, 2026T2106,4021,002584,71699915.4%
Aug 17, 2026T2382,6202,3573,777,4532,2599.2%
Aug 10, 2026T2461,4275,1572,006,6764,13118.7%
Aug 3, 2026T2397,3972,6191,200,6722,05924.9%
Jul 27, 2026T2207,7112,1131,016,4442,21517.0%
Jul 20, 2026T2425,2513,5253,363,2375,66411.2%