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Alto Ingredients, Inc.

ALTO
Exchange
Nasdaq
Industry
Industrial Organic Chemicals
SEC CIK
0000778164

In the last 90 days, Alto Ingredients, Inc. insiders filed 1 open-market purchase and 0 sales; 132 institutions reported holding it in 13F filings for Q2 2026, worth $204.5M 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
4.96M
Shares, settlement Oct 30, 2026
Change
−644.7K
−11.5% vs. Oct 15, 2026
Days to cover
5.53
Short interest ÷ average daily volume
Average daily volume
896.1K
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 766,273 sharesNov 15, 2024: 973,385 sharesNov 29, 2024: 729,589 sharesDec 13, 2024: 585,330 sharesDec 31, 2024: 529,992 sharesJan 15, 2025: 622,030 sharesJan 31, 2025: 575,384 sharesFeb 14, 2025: 687,043 sharesFeb 28, 2025: 882,009 sharesMar 14, 2025: 1,017,253 sharesMar 31, 2025: 1,144,686 sharesApr 15, 2025: 1,031,561 sharesApr 30, 2025: 962,030 sharesMay 15, 2025: 783,576 sharesMay 30, 2025: 866,849 sharesJun 13, 2025: 876,230 sharesJun 30, 2025: 505,460 sharesJul 15, 2025: 459,122 sharesJul 31, 2025: 404,023 sharesAug 15, 2025: 466,726 sharesAug 29, 2025: 503,129 sharesSep 15, 2025: 486,393 sharesSep 30, 2025: 500,791 sharesOct 15, 2025: 439,590 sharesOct 31, 2025: 435,746 sharesNov 14, 2025: 992,450 sharesNov 28, 2025: 590,529 sharesDec 15, 2025: 641,656 sharesDec 31, 2025: 655,894 sharesJan 15, 2026: 682,787 sharesJan 30, 2026: 651,898 sharesFeb 13, 2026: 881,890 sharesFeb 27, 2026: 714,667 sharesMar 13, 2026: 1,499,882 sharesMar 31, 2026: 1,554,891 sharesApr 15, 2026: 1,820,337 sharesApr 30, 2026: 1,857,808 sharesMay 15, 2026: 1,454,213 sharesMay 29, 2026: 2,291,177 sharesJun 15, 2026: 2,277,827 sharesJun 30, 2026: 4,118,629 sharesJul 15, 2026: 5,734,199 sharesJul 31, 2026: 5,985,139 sharesAug 14, 2026: 5,824,043 sharesAug 31, 2026: 6,315,309 sharesSep 15, 2026: 6,516,329 sharesSep 30, 2026: 5,943,360 sharesOct 15, 2026: 5,601,582 sharesOct 30, 2026: 4,956,879 shares
Short interest in ALTO by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 20264.96M−644.7K−11.5%896.1K5.53
Oct 15, 20265.60M−341.8K−5.8%968.4K5.78
Sep 30, 20265.94M−573.0K−8.8%1.18M5.03
Sep 15, 20266.52M+201.0K+3.2%1.12M5.80
Aug 31, 20266.32M+491.3K+8.4%1.55M4.07
Aug 14, 20265.82M−161.1K−2.7%2.45M2.38
Jul 31, 20265.99M+250.9K+4.4%2.37M2.52
Jul 15, 20265.73M+1.62M+39.2%2.27M2.53
Jun 30, 20264.12M+1.84M+80.8%3.19M1.29
Jun 15, 20262.28M−13.3K−0.6%2.46M1.00
May 29, 20262.29M+837.0K+57.6%2.22M1.03
May 15, 20261.45M−403.6K−21.7%2.57M1.00
Apr 30, 20261.86M+37.5K+2.1%1.22M1.52
Apr 15, 20261.82M+265.4K+17.1%1.45M1.26
Mar 31, 20261.55M+55.0K+3.7%1.37M1.14
Mar 13, 20261.50M+785.2K+109.9%4.81M1.00
Feb 27, 2026714.7K−167.2K−19.0%427.6K1.67
Feb 13, 2026881.9K+230.0K+35.3%821.1K1.07
Jan 30, 2026651.9K−30.9K−4.5%885.0K1.00
Jan 15, 2026682.8K+26.9K+4.1%1.18M1.00
Dec 31, 2025655.9K+14.2K+2.2%1.56M1.00
Dec 15, 2025641.7K+51.1K+8.7%1.38M1.00
Nov 28, 2025590.5K−401.9K−40.5%1.61M1.00
Nov 14, 2025992.5K+556.7K+127.8%4.94M1.00
Oct 31, 2025435.7K−3.84K−0.9%220.6K1.97
Oct 15, 2025439.6K−61.2K−12.2%267.6K1.64
Sep 30, 2025500.8K+14.4K+3.0%591.2K1.00
Sep 15, 2025486.4K−16.7K−3.3%148.5K3.28
Aug 29, 2025503.1K+36.4K+7.8%181.0K2.78
Aug 15, 2025466.7K+62.7K+15.5%274.3K1.70
Jul 31, 2025404.0K−55.1K−12.0%174.2K2.32
Jul 15, 2025459.1K−46.3K−9.2%209.6K2.19
Jun 30, 2025505.5K−370.8K−42.3%320.3K1.58
Jun 13, 2025876.2K+9.38K+1.1%336.0K2.61
May 30, 2025866.8K+83.3K+10.6%310.8K2.79
May 15, 2025783.6K−178.5K−18.6%428.4K1.83
Apr 30, 2025962.0K−69.5K−6.7%241.1K3.99
Apr 15, 20251.03M−113.1K−9.9%652.4K1.58
Mar 31, 20251.14M+127.4K+12.5%802.1K1.43
Mar 14, 20251.02M+135.2K+15.3%575.6K1.77
Feb 28, 2025882.0K+195.0K+28.4%830.6K1.06
Feb 14, 2025687.0K+111.7K+19.4%497.4K1.38
Jan 31, 2025575.4K−46.6K−7.5%651.6K1.00
Jan 15, 2025622.0K+92.0K+17.4%681.7K1.00
Dec 31, 2024530.0K−55.3K−9.5%835.8K1.00
Dec 13, 2024585.3K−144.3K−19.8%584.3K1.00
Nov 29, 2024729.6K−243.8K−25.1%736.3K1.00
Nov 15, 2024973.4K+207.1K+27.0%1.95M1.00
Oct 31, 2024766.3K−120.4K−13.6%459.5K1.67

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 ALTO by settlement date
Settlement dateSharesPriceValue
Oct 9, 202687$3.73$324.51
Oct 5, 20262,424$3.77$9.14K
Sep 15, 20263,395$3.96$13.4K
Sep 10, 2026886$4.02$3.56K
Sep 9, 20261,038$4.11$4.27K
Aug 31, 20263,191$4.07$13.0K
Aug 27, 2026416$4.08$1.70K
Aug 4, 2026659$4.86$3.20K
Jul 29, 2026895$4.45$3.98K
Jul 27, 20261,878$4.64$8.71K
Jul 22, 202672,811$4.98$362.6K
Jul 20, 202629,065$5.84$169.7K
Jul 17, 20265$5.17$25.85
Jul 16, 2026181,369$5.19$941.3K
Jul 15, 2026162,392$5.62$912.6K
Jul 10, 20262,873$5.67$16.3K
Jul 2, 202690$5.98$538.2
Jun 29, 202628,310$5.19$146.9K
Jun 23, 20262,269$5.22$11.8K
Jun 15, 2026209$5.70$1.19K
Jun 11, 20262,303$5.66$13.0K
Jun 9, 20269,943$5.63$56.0K
Jun 5, 20262,394$5.52$13.2K
May 20, 2026389$4.72$1.84K
May 19, 2026480$4.70$2.26K
May 8, 2026785$4.54$3.56K
Apr 24, 20262,777$5.31$14.7K
Apr 20, 202624,983$4.94$123.4K
Apr 10, 20262,059$4.87$10.0K
Mar 23, 20264,422$4.16$18.4K

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 ALTO by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 12, 2026202,0412,729374,15654.0%
Nov 11, 2026254,753200432,47058.9%
Nov 10, 2026198,82523327,76160.7%
Nov 9, 2026271,3322,209499,70254.3%
Nov 6, 2026289,8071,4291,212,18823.9%
Nov 5, 2026365,729500682,93453.6%
Nov 4, 2026314,4872,101492,34163.9%
Nov 3, 2026226,1510381,07259.3%
Nov 2, 2026187,6500361,34851.9%
Oct 30, 2026190,354479277,49268.6%
Oct 29, 2026104,3233,163203,98351.1%
Oct 28, 2026195,2260340,82057.3%
Oct 27, 2026231,1881,900468,22149.4%
Oct 26, 2026165,3441316,04452.3%
Oct 23, 2026175,5980319,43955.0%
Oct 22, 2026182,1400268,90367.7%
Oct 21, 2026161,536272302,66853.4%
Oct 20, 2026125,4520253,75849.4%
Oct 19, 2026251,134363381,45565.8%
Oct 16, 2026382,3422,722736,67851.9%
Oct 15, 2026258,857711442,15358.5%
Oct 14, 2026190,8920356,17453.6%
Oct 13, 2026176,700107334,50752.8%
Oct 12, 2026187,3961,817374,88750.0%
Oct 9, 2026218,5850351,93262.1%
Oct 8, 2026119,423526237,55350.3%
Oct 7, 2026184,75992411,86844.9%
Oct 6, 2026107,360906295,33336.4%
Oct 5, 2026167,673491372,58345.0%
Oct 2, 2026270,4510464,49758.2%

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 ALTO
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T2902,65113,637858,9162,89251.2%
Sep 28, 2026T2929,97315,1891,350,9784,12540.8%
Sep 21, 2026T2961,82815,6001,160,0044,16945.3%
Sep 14, 2026T2891,55914,8791,900,0004,13731.9%
Sep 7, 2026T2550,71011,6311,007,0533,13135.4%
Aug 31, 2026T21,169,36617,5653,066,5896,40127.6%
Aug 24, 2026T21,210,60515,0352,539,9976,04232.3%
Aug 17, 2026T21,465,01018,4241,544,7634,85048.7%
Aug 10, 2026T22,079,58526,2354,111,01810,40433.6%
Aug 3, 2026T22,116,04230,4873,623,2879,57436.9%
Jul 27, 2026T21,433,45428,4922,498,8617,15436.5%
Jul 20, 2026T22,130,82632,8984,207,1359,81633.6%