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Alamar Biosciences, Inc.

ALMR
Exchange
Nasdaq
Industry
Laboratory Analytical Instruments
SEC CIK
0002104204

In the last 90 days, Alamar Biosciences, Inc. insiders filed 0 open-market purchases and 7 sales; 87 institutions reported holding it in 13F filings for Q2 2026, worth $664.3M in total; 3 superinvestors hold it, including ARK Invest and HHLR Advisors (Hillhouse).

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
2.24M
Shares, settlement Oct 30, 2026
Change
−433.3K
−16.2% vs. Oct 15, 2026
Days to cover
3.27
Short interest ÷ average daily volume
Average daily volume
685.8K
Shares, as reported by FINRA
Short interest by settlement date
Apr 30, 2026: 1,153,031 sharesMay 15, 2026: 1,700,025 sharesMay 29, 2026: 1,770,245 sharesJun 15, 2026: 1,876,490 sharesJun 30, 2026: 2,790,289 sharesJul 15, 2026: 2,245,722 sharesJul 31, 2026: 2,430,004 sharesAug 14, 2026: 2,075,441 sharesAug 31, 2026: 2,121,181 sharesSep 15, 2026: 2,122,340 sharesSep 30, 2026: 2,810,938 sharesOct 15, 2026: 2,676,396 sharesOct 30, 2026: 2,243,114 shares
Short interest in ALMR by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 20262.24M−433.3K−16.2%685.8K3.27
Oct 15, 20262.68M−134.5K−4.8%853.1K3.14
Sep 30, 20262.81M+688.6K+32.5%661.4K4.25
Sep 15, 20262.12M+1.16K+0.1%267.0K7.95
Aug 31, 20262.12M+45.7K+2.2%324.8K6.53
Aug 14, 20262.08M−354.6K−14.6%390.1K5.32
Jul 31, 20262.43M+184.3K+8.2%214.7K11.32
Jul 15, 20262.25M−544.6K−19.5%296.1K7.58
Jun 30, 20262.79M+913.8K+48.7%568.9K4.90
Jun 15, 20261.88M+106.2K+6.0%163.7K11.46
May 29, 20261.77M+70.2K+4.1%260.9K6.78
May 15, 20261.70M+547.0K+47.4%227.9K7.46
Apr 30, 20261.15M+1.15M+100.0%776.6K1.48

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 ALMR by settlement date
Settlement dateSharesPriceValue
Oct 14, 202667,706$23.52$1.59M
Oct 13, 202697,025$24.24$2.35M
Oct 7, 20269,423$32.26$304.0K
Oct 6, 2026501$38.13$19.1K
Oct 5, 20261,600$34.36$55.0K
Oct 1, 20265,232$34.07$178.3K
Sep 30, 2026935$32.65$30.5K
Sep 29, 20261,179$32.61$38.4K
Sep 24, 20268,578$32.14$275.7K
Sep 23, 202653,531$33.22$1.78M
Sep 22, 202661,632$35.05$2.16M
Sep 21, 202650,052$34.85$1.74M
Sep 17, 2026873$29.38$25.6K
Sep 16, 2026664$28.75$19.1K
Sep 4, 2026292$30.57$8.93K
Sep 2, 20265,076$29.36$149.0K
Aug 27, 20262,464$34.08$84.0K
Aug 21, 20264$34.64$138.56
Aug 12, 2026781$36.57$28.6K
Aug 5, 20261,190$27.11$32.3K
Aug 4, 20261,205$27.07$32.6K
Jul 30, 20261,438$24.37$35.0K
Jul 27, 2026102$25.88$2.64K
Jul 23, 202660$25.12$1.51K
Jul 17, 2026651$24.95$16.2K
Jul 2, 202651,429$26.13$1.34M
Jun 30, 202611,472$27.77$318.6K
Jun 26, 20262,018$26.87$54.2K
Jun 18, 202617$20.20$343.4
Jun 15, 20267,604$22.00$167.3K

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 ALMR by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 2026145,5400184,29379.0%
Nov 9, 2026196,58227,832266,44673.8%
Nov 6, 2026152,554355191,58079.6%
Nov 5, 2026444,09321,361554,54780.1%
Nov 4, 2026389,6667,576537,88072.4%
Nov 3, 2026158,8700252,74762.9%
Nov 2, 2026304,568520371,31182.0%
Oct 30, 2026168,9201,539214,41778.8%
Oct 29, 2026125,6280187,44367.0%
Oct 28, 2026305,4630425,49671.8%
Oct 27, 2026142,3080228,73062.2%
Oct 26, 2026201,4330243,29982.8%
Oct 23, 2026160,79488213,41975.3%
Oct 22, 2026228,9760269,95684.8%
Oct 21, 2026399,763150,316473,54984.4%
Oct 20, 2026177,16847,066268,89965.9%
Oct 19, 2026153,00525,486229,10766.8%
Oct 16, 2026112,5199190,16459.2%
Oct 15, 2026413,5348,781558,20974.1%
Oct 14, 2026103,8450159,08765.3%
Oct 13, 2026257,9640327,90578.7%
Oct 12, 2026366,2700611,14259.9%
Oct 9, 2026185,3290487,85338.0%
Oct 8, 2026283,66113,541411,18669.0%
Oct 7, 2026362,5252,746548,15866.1%
Oct 6, 2026423,9362,571611,63969.3%
Oct 5, 202696,5260151,60663.7%
Oct 2, 2026129,9980147,38588.2%
Oct 1, 202678,6640105,18974.8%
Sep 30, 2026229,9020410,70856.0%

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 ALMR
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T21,777,63524,580658,8994,59773.0%
Sep 28, 2026T2519,87814,2451,115,4124,40731.8%
Sep 21, 2026T2632,25920,784621,2505,51550.4%
Sep 14, 2026T21,286,23019,517912,0345,14858.5%
Sep 7, 2026T2326,15110,06686,2502,14979.1%
Aug 31, 2026T2397,19413,41774,7042,73484.2%
Aug 24, 2026T2500,50114,039343,8301,75259.3%
Aug 17, 2026T2658,59314,279278,3362,51570.3%
Aug 10, 2026T21,017,73921,205500,8455,78767.0%
Aug 3, 2026T2378,3748,40766,8381,08185.0%
Jul 27, 2026T2280,5957,77494,4551,06574.8%
Jul 20, 2026T2296,79510,13671,5491,19480.6%