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Tarsus Pharmaceuticals, Inc.

TARS
Exchange
Nasdaq
Industry
Biological Products, (No Diagnostic Substances)
SEC CIK
0001819790

In the last 90 days, Tarsus Pharmaceuticals, Inc. insiders filed 0 open-market purchases and 6 sales; 256 institutions reported holding it in 13F filings for Q2 2026, worth $2.98B 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
6.07M
Shares, settlement Oct 30, 2026
Change
+335.1K
+5.9% vs. Oct 15, 2026
Days to cover
6.94
Short interest ÷ average daily volume
Average daily volume
874.5K
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 8,157,528 sharesNov 15, 2024: 7,140,778 sharesNov 29, 2024: 7,180,505 sharesDec 13, 2024: 7,543,047 sharesDec 31, 2024: 7,328,028 sharesJan 15, 2025: 7,020,304 sharesJan 31, 2025: 7,339,031 sharesFeb 14, 2025: 7,082,922 sharesFeb 28, 2025: 7,342,164 sharesMar 14, 2025: 7,403,040 sharesMar 31, 2025: 7,651,107 sharesApr 15, 2025: 8,378,489 sharesApr 30, 2025: 8,308,925 sharesMay 15, 2025: 7,779,546 sharesMay 30, 2025: 8,073,126 sharesJun 13, 2025: 8,111,634 sharesJun 30, 2025: 8,856,844 sharesJul 15, 2025: 8,208,464 sharesJul 31, 2025: 8,136,900 sharesAug 15, 2025: 7,339,962 sharesAug 29, 2025: 6,925,599 sharesSep 15, 2025: 7,634,147 sharesSep 30, 2025: 7,243,632 sharesOct 15, 2025: 7,025,255 sharesOct 31, 2025: 7,279,055 sharesNov 14, 2025: 7,166,734 sharesNov 28, 2025: 7,116,863 sharesDec 15, 2025: 6,807,544 sharesDec 31, 2025: 4,551,689 sharesJan 15, 2026: 5,365,607 sharesJan 30, 2026: 5,813,209 sharesFeb 13, 2026: 5,460,762 sharesFeb 27, 2026: 5,326,451 sharesMar 13, 2026: 5,021,787 sharesMar 31, 2026: 4,575,347 sharesApr 15, 2026: 4,558,352 sharesApr 30, 2026: 4,817,273 sharesMay 15, 2026: 4,905,282 sharesMay 29, 2026: 5,125,873 sharesJun 15, 2026: 4,979,585 sharesJun 30, 2026: 5,889,643 sharesJul 15, 2026: 5,783,063 sharesJul 31, 2026: 6,016,830 sharesAug 14, 2026: 5,997,475 sharesAug 31, 2026: 6,011,550 sharesSep 15, 2026: 6,127,884 sharesSep 30, 2026: 6,070,928 sharesOct 15, 2026: 5,731,409 sharesOct 30, 2026: 6,066,524 shares
Short interest in TARS by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 20266.07M+335.1K+5.9%874.5K6.94
Oct 15, 20265.73M−339.5K−5.6%1.00M5.71
Sep 30, 20266.07M−57.0K−0.9%732.0K8.29
Sep 15, 20266.13M+116.3K+1.9%923.4K6.64
Aug 31, 20266.01M+14.1K+0.2%613.2K9.80
Aug 14, 20266.00M−19.4K−0.3%801.1K7.49
Jul 31, 20266.02M+233.8K+4.0%914.4K6.58
Jul 15, 20265.78M−106.6K−1.8%1.82M3.18
Jun 30, 20265.89M+910.1K+18.3%943.2K6.24
Jun 15, 20264.98M−146.3K−2.9%559.3K8.90
May 29, 20265.13M+220.6K+4.5%690.1K7.43
May 15, 20264.91M+88.0K+1.8%855.8K5.73
Apr 30, 20264.82M+258.9K+5.7%642.3K7.50
Apr 15, 20264.56M−17.0K−0.4%344.4K13.24
Mar 31, 20264.58M−446.4K−8.9%508.7K8.99
Mar 13, 20265.02M−304.7K−5.7%495.1K10.14
Feb 27, 20265.33M−134.3K−2.5%782.0K6.81
Feb 13, 20265.46M−352.4K−6.1%555.6K9.83
Jan 30, 20265.81M+447.6K+8.3%543.9K10.69
Jan 15, 20265.37M+813.9K+17.9%524.2K10.24
Dec 31, 20254.55M−2.26M−33.1%815.0K5.59
Dec 15, 20256.81M−309.3K−4.4%453.9K15.00
Nov 28, 20257.12M−49.9K−0.7%416.5K17.09
Nov 14, 20257.17M−112.3K−1.5%490.7K14.61
Oct 31, 20257.28M+253.8K+3.6%488.8K14.89
Oct 15, 20257.03M−218.4K−3.0%692.8K10.14
Sep 30, 20257.24M−390.5K−5.1%636.8K11.37
Sep 15, 20257.63M+708.5K+10.2%832.8K9.17
Aug 29, 20256.93M−414.4K−5.7%533.0K12.99
Aug 15, 20257.34M−796.9K−9.8%803.4K9.14
Jul 31, 20258.14M−71.6K−0.9%561.1K14.50
Jul 15, 20258.21M−648.4K−7.3%563.5K14.57
Jun 30, 20258.86M+745.2K+9.2%644.9K13.73
Jun 13, 20258.11M+38.5K+0.5%551.9K14.70
May 30, 20258.07M+293.6K+3.8%484.1K16.68
May 15, 20257.78M−529.4K−6.4%873.4K8.91
Apr 30, 20258.31M−69.6K−0.8%655.6K12.67
Apr 15, 20258.38M+727.4K+9.5%693.1K12.09
Mar 31, 20257.65M+248.1K+3.4%729.8K10.48
Mar 14, 20257.40M+60.9K+0.8%593.7K12.47
Feb 28, 20257.34M+259.2K+3.7%791.3K9.28
Feb 14, 20257.08M−256.1K−3.5%454.4K15.59
Jan 31, 20257.34M+318.7K+4.5%460.8K15.93
Jan 15, 20257.02M−307.7K−4.2%994.9K7.06
Dec 31, 20247.33M−215.0K−2.9%520.9K14.07
Dec 13, 20247.54M+362.5K+5.1%506.6K14.89
Nov 29, 20247.18M+39.7K+0.6%492.7K14.57
Nov 15, 20247.14M−1.02M−12.5%1.07M6.68
Oct 31, 20248.16M−1.52M−15.7%931.9K8.75

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 TARS by settlement date
Settlement dateSharesPriceValue
Sep 29, 20262$76.81$153.62
Sep 8, 2026249$90.78$22.6K
Sep 2, 20261,875$74.05$138.8K
Aug 7, 202610$65.33$653.3
Aug 5, 202630,000$61.11$1.83M
Jul 23, 20267,966$57.58$458.7K
Jul 20, 202628$59.85$1.68K
Jul 17, 2026314$57.69$18.1K
Jul 14, 20265,316$59.31$315.3K
Jul 1, 2026122,000$62.94$7.68M
Jun 30, 202643,653$61.26$2.67M
Jun 29, 2026132,239$62.92$8.32M
Jun 24, 202637,119$66.17$2.46M
Jun 8, 20269,788$59.28$580.2K
Jun 4, 2026661$58.76$38.8K
Jun 3, 20263,725$57.41$213.9K
Jun 1, 20269,574$59.40$568.7K
May 29, 202650$59.54$2.98K
May 26, 2026246$62.26$15.3K
May 19, 20262,000$62.82$125.6K
May 18, 202619$62.48$1.19K
May 7, 202622,576$64.76$1.46M
Apr 30, 202635$60.67$2.12K
Apr 24, 20268$60.97$487.76
Apr 17, 20267$67.72$474.04
Apr 14, 202624,747$72.65$1.80M
Apr 13, 2026283$72.56$20.5K
Apr 7, 20267$70.19$491.33
Apr 6, 20264$70.12$280.48
Apr 1, 2026273$70.15$19.2K

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 TARS by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 2026171,40912,222222,37977.1%
Nov 9, 2026167,4306,730332,80850.3%
Nov 6, 2026213,9292,935290,24273.7%
Nov 5, 2026221,86328,624306,19972.5%
Nov 4, 2026781,37230,476937,78483.3%
Nov 3, 2026131,7211,807287,63945.8%
Nov 2, 202694,4251,128138,20568.3%
Oct 30, 2026119,5240156,03576.6%
Oct 29, 2026104,8090134,60777.9%
Oct 28, 2026121,6750168,48272.2%
Oct 27, 202685,6920122,76669.8%
Oct 26, 2026138,9672,985167,04683.2%
Oct 23, 2026110,98727,321203,43454.6%
Oct 22, 2026149,994207194,73377.0%
Oct 21, 2026373,511400448,28583.3%
Oct 20, 2026212,0986,518319,12266.5%
Oct 19, 2026105,2891,867206,62851.0%
Oct 16, 2026181,8301,888291,72762.3%
Oct 15, 2026247,09521,992412,28959.9%
Oct 14, 2026142,4300282,26150.5%
Oct 13, 2026130,57710353,76136.9%
Oct 12, 2026138,1210288,89247.8%
Oct 9, 202679,5022154,05351.6%
Oct 8, 202699,2640216,23645.9%
Oct 7, 202658,3910121,34248.1%
Oct 6, 2026109,4380154,73070.7%
Oct 5, 2026101,8330188,50454.0%
Oct 2, 2026144,5530293,91849.2%
Oct 1, 2026293,01420414,98070.6%
Sep 30, 2026251,7060334,58075.2%

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 TARS
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T2661,28623,2391,090,8875,55837.7%
Sep 28, 2026T21,170,59129,9062,677,5595,93930.4%
Sep 21, 2026T2959,68223,376728,6925,77556.8%
Sep 14, 2026T2749,57027,304664,3984,87253.0%
Sep 7, 2026T2904,63825,348469,9725,77265.8%
Aug 31, 2026T21,800,67735,571790,5347,79669.5%
Aug 24, 2026T2797,86324,606814,6994,66749.5%
Aug 17, 2026T2914,99421,599473,4943,89865.9%
Aug 10, 2026T21,528,53334,278449,8266,71277.3%
Aug 3, 2026T21,604,48630,615475,8485,30677.1%
Jul 27, 2026T21,101,23131,401224,5273,48783.1%
Jul 20, 2026T21,381,99229,4621,737,8603,96744.3%