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Rapport Therapeutics, Inc.

RAPP
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0002012593

In the last 90 days, Rapport Therapeutics, Inc. insiders filed 7 open-market purchases and 8 sales; 160 institutions reported holding it in 13F filings for Q2 2026, worth $2.13B 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
3.96M
Shares, settlement Oct 30, 2026
Change
+904.9K
+29.7% vs. Oct 15, 2026
Days to cover
1.79
Short interest ÷ average daily volume
Average daily volume
2.21M
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 2,111,005 sharesNov 15, 2024: 1,737,758 sharesNov 29, 2024: 1,790,608 sharesDec 13, 2024: 1,808,388 sharesDec 31, 2024: 1,767,615 sharesJan 15, 2025: 1,499,086 sharesJan 31, 2025: 1,507,672 sharesFeb 14, 2025: 1,662,019 sharesFeb 28, 2025: 1,808,501 sharesMar 14, 2025: 2,312,622 sharesMar 31, 2025: 2,801,327 sharesApr 15, 2025: 2,438,677 sharesApr 30, 2025: 2,523,770 sharesMay 15, 2025: 2,468,259 sharesMay 30, 2025: 2,623,331 sharesJun 13, 2025: 2,833,255 sharesJun 30, 2025: 2,828,863 sharesJul 15, 2025: 2,860,712 sharesJul 31, 2025: 3,051,967 sharesAug 15, 2025: 3,023,076 sharesAug 29, 2025: 3,146,776 sharesSep 15, 2025: 3,158,524 sharesSep 30, 2025: 3,030,832 sharesOct 15, 2025: 2,016,786 sharesOct 31, 2025: 1,932,558 sharesNov 14, 2025: 2,002,709 sharesNov 28, 2025: 2,149,458 sharesDec 15, 2025: 2,230,607 sharesDec 31, 2025: 2,692,137 sharesJan 15, 2026: 2,870,977 sharesJan 30, 2026: 3,289,758 sharesFeb 13, 2026: 3,402,222 sharesFeb 27, 2026: 3,513,015 sharesMar 13, 2026: 3,711,232 sharesMar 31, 2026: 3,849,519 sharesApr 15, 2026: 3,409,588 sharesApr 30, 2026: 3,048,448 sharesMay 15, 2026: 2,417,349 sharesMay 29, 2026: 2,459,901 sharesJun 15, 2026: 2,246,097 sharesJun 30, 2026: 2,260,158 sharesJul 15, 2026: 2,690,734 sharesJul 31, 2026: 2,248,235 sharesAug 14, 2026: 2,225,618 sharesAug 31, 2026: 2,233,723 sharesSep 15, 2026: 2,248,069 sharesSep 30, 2026: 3,194,008 sharesOct 15, 2026: 3,051,500 sharesOct 30, 2026: 3,956,396 shares
Short interest in RAPP by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 20263.96M+904.9K+29.7%2.21M1.79
Oct 15, 20263.05M−142.5K−4.5%259.5K11.76
Sep 30, 20263.19M+945.9K+42.1%660.1K4.84
Sep 15, 20262.25M+14.3K+0.6%284.3K7.91
Aug 31, 20262.23M+8.11K+0.4%271.4K8.23
Aug 14, 20262.23M−22.6K−1.0%295.8K7.53
Jul 31, 20262.25M−442.5K−16.5%299.2K7.51
Jul 15, 20262.69M+430.6K+19.1%439.0K6.13
Jun 30, 20262.26M+14.1K+0.6%489.0K4.62
Jun 15, 20262.25M−213.8K−8.7%316.7K7.09
May 29, 20262.46M+42.6K+1.8%284.8K8.64
May 15, 20262.42M−631.1K−20.7%348.8K6.93
Apr 30, 20263.05M−361.1K−10.6%420.8K7.24
Apr 15, 20263.41M−439.9K−11.4%240.5K14.17
Mar 31, 20263.85M+138.3K+3.7%317.0K12.15
Mar 13, 20263.71M+198.2K+5.6%407.4K9.11
Feb 27, 20263.51M+110.8K+3.3%282.6K12.43
Feb 13, 20263.40M+112.5K+3.4%255.1K13.34
Jan 30, 20263.29M+418.8K+14.6%373.3K8.81
Jan 15, 20262.87M+178.8K+6.6%360.3K7.97
Dec 31, 20252.69M+461.5K+20.7%469.8K5.73
Dec 15, 20252.23M+81.1K+3.8%338.0K6.60
Nov 28, 20252.15M+146.7K+7.3%395.4K5.44
Nov 14, 20252.00M+70.2K+3.6%380.2K5.27
Oct 31, 20251.93M−84.2K−4.2%362.4K5.33
Oct 15, 20252.02M−1.01M−33.5%429.7K4.69
Sep 30, 20253.03M−127.7K−4.0%812.0K3.73
Sep 15, 20253.16M+11.7K+0.4%2.70M1.17
Aug 29, 20253.15M+123.7K+4.1%222.0K14.18
Aug 15, 20253.02M−28.9K−1.0%163.3K18.51
Jul 31, 20253.05M+191.3K+6.7%159.3K19.16
Jul 15, 20252.86M+31.8K+1.1%169.3K16.89
Jun 30, 20252.83M−4.39K−0.2%145.6K19.43
Jun 13, 20252.83M+209.9K+8.0%267.3K10.60
May 30, 20252.62M+155.1K+6.3%202.4K12.96
May 15, 20252.47M−55.5K−2.2%107.5K22.97
Apr 30, 20252.52M+85.1K+3.5%131.7K19.16
Apr 15, 20252.44M−362.6K−13.0%217.7K11.20
Mar 31, 20252.80M+488.7K+21.1%322.5K8.69
Mar 14, 20252.31M+504.1K+27.9%399.1K5.80
Feb 28, 20251.81M+146.5K+8.8%221.5K8.17
Feb 14, 20251.66M+154.3K+10.2%94.3K17.63
Jan 31, 20251.51M+8.59K+0.6%88.2K17.10
Jan 15, 20251.50M−268.5K−15.2%112.9K13.28
Dec 31, 20241.77M−40.8K−2.3%125.9K14.04
Dec 13, 20241.81M+17.8K+1.0%143.5K12.60
Nov 29, 20241.79M+52.9K+3.0%108.4K16.52
Nov 15, 20241.74M−373.2K−17.7%80.2K21.68
Oct 31, 20242.11M+192.3K+10.0%93.9K22.49

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 RAPP by settlement date
Settlement dateSharesPriceValue
Sep 18, 202629$41.95$1.22K
Sep 3, 2026894$48.69$43.5K
Aug 28, 2026325$50.83$16.5K
Aug 19, 20262,723$49.01$133.5K
Aug 7, 20262,124$46.35$98.4K
Jul 17, 20261,718$40.13$68.9K
Jun 26, 202636$38.91$1.40K
Jun 24, 20264,340$38.88$168.7K
May 29, 20266,571$39.49$259.5K
May 28, 20264,384$39.51$173.2K
May 27, 20264,378$39.71$173.9K
May 22, 202641,900$36.70$1.54M
May 20, 20261,047$34.37$36.0K
May 19, 2026352$35.18$12.4K
May 18, 2026200$37.07$7.41K
May 14, 20262,292$38.08$87.3K
May 12, 202657$38.43$2.19K
May 8, 20264,238$39.93$169.2K
May 7, 2026806$37.06$29.9K
May 4, 2026500$33.89$16.9K
Apr 22, 202616,400$36.95$606.0K
Apr 15, 2026650$36.15$23.5K
Apr 8, 202658$33.49$1.94K
Apr 6, 20267,136$33.58$239.6K
Apr 2, 2026282$31.67$8.93K
Apr 1, 20268,485$31.29$265.5K
Mar 31, 20262,256$27.69$62.5K
Mar 27, 202678$29.00$2.26K
Mar 25, 2026352$28.25$9.94K
Mar 23, 20267$27.08$189.56

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 RAPP by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 2026134,828104218,48561.7%
Nov 9, 2026244,4610320,66376.2%
Nov 6, 2026182,5540250,82272.8%
Nov 5, 2026172,609116268,09164.4%
Nov 4, 2026276,012853372,26474.1%
Nov 3, 2026201,5420322,64762.5%
Nov 2, 2026229,4520372,15661.7%
Oct 30, 2026156,3310311,08550.3%
Oct 29, 2026546,7066,9521,203,59045.4%
Oct 28, 20261,530,04046,2652,831,93454.0%
Oct 27, 2026139,4500210,20066.3%
Oct 26, 2026326,0290495,02365.9%
Oct 23, 2026185,5083,780519,73935.7%
Oct 22, 2026330,07122,080690,14347.8%
Oct 21, 2026412,52917,065893,16046.2%
Oct 20, 20261,755,6381,7332,654,93566.1%
Oct 19, 202666,4510104,38263.7%
Oct 16, 2026103,8260140,08974.1%
Oct 15, 202676,7480116,11166.1%
Oct 14, 202683,5960112,20574.5%
Oct 13, 202656,6124,053121,68846.5%
Oct 12, 202622,352040,01055.9%
Oct 9, 202635,010077,90444.9%
Oct 8, 202646,2441,65984,43854.8%
Oct 7, 202653,985089,25160.5%
Oct 6, 202645,016072,86461.8%
Oct 5, 202629,128056,54151.5%
Oct 2, 202666,27512,290102,85164.4%
Oct 1, 202647,6190113,00942.1%
Sep 30, 202672,3480169,27342.7%

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 RAPP
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T2278,50812,365139,1922,88566.7%
Sep 28, 2026T2657,35316,897251,8234,62272.3%
Sep 21, 2026T21,461,59221,072274,6054,54584.2%
Sep 14, 2026T2522,68320,755331,0703,00061.2%
Sep 7, 2026T2531,89522,336128,9491,97580.5%
Aug 31, 2026T2360,24614,049149,4582,64470.7%
Aug 24, 2026T2607,84717,596215,4453,22573.8%
Aug 17, 2026T2262,46314,617151,4341,94763.4%
Aug 10, 2026T2463,07416,17690,2392,06983.7%
Aug 3, 2026T2460,54714,392115,0893,01980.0%
Jul 27, 2026T2484,96214,839178,0352,74673.1%
Jul 20, 2026T2412,14713,610114,9061,90978.2%