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Livermore
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Portillo's Inc.

PTLO
Exchange
Nasdaq
Industry
Retail-Eating Places
SEC CIK
0001871509

No open-market purchases or sales by Portillo's Inc. insiders were filed in the last 90 days; 172 institutions reported holding it in 13F filings for Q2 2026, worth $214.5M 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
10.1M
Shares, settlement Oct 30, 2026
Change
+457.9K
+4.8% vs. Oct 15, 2026
Days to cover
5.67
Short interest ÷ average daily volume
Average daily volume
1.78M
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 8,218,557 sharesNov 15, 2024: 8,133,047 sharesNov 29, 2024: 6,958,625 sharesDec 13, 2024: 6,956,519 sharesDec 31, 2024: 8,121,738 sharesJan 15, 2025: 7,807,838 sharesJan 31, 2025: 8,484,759 sharesFeb 14, 2025: 8,661,188 sharesFeb 28, 2025: 9,180,528 sharesMar 14, 2025: 9,716,904 sharesMar 31, 2025: 11,064,198 sharesApr 15, 2025: 10,709,928 sharesApr 30, 2025: 10,416,958 sharesMay 15, 2025: 10,174,745 sharesMay 30, 2025: 8,998,943 sharesJun 13, 2025: 9,899,987 sharesJun 30, 2025: 9,074,552 sharesJul 15, 2025: 9,418,204 sharesJul 31, 2025: 9,536,062 sharesAug 15, 2025: 8,270,903 sharesAug 29, 2025: 11,003,543 sharesSep 15, 2025: 11,032,644 sharesSep 30, 2025: 11,135,710 sharesOct 15, 2025: 11,417,870 sharesOct 31, 2025: 12,450,176 sharesNov 14, 2025: 14,248,854 sharesNov 28, 2025: 14,033,335 sharesDec 15, 2025: 13,642,773 sharesDec 31, 2025: 14,153,122 sharesJan 15, 2026: 13,066,651 sharesJan 30, 2026: 11,720,721 sharesFeb 13, 2026: 11,827,865 sharesFeb 27, 2026: 11,222,548 sharesMar 13, 2026: 10,638,880 sharesMar 31, 2026: 10,280,384 sharesApr 15, 2026: 9,714,658 sharesApr 30, 2026: 9,041,924 sharesMay 15, 2026: 10,116,232 sharesMay 29, 2026: 9,922,637 sharesJun 15, 2026: 11,339,430 sharesJun 30, 2026: 10,229,699 sharesJul 15, 2026: 10,118,549 sharesJul 31, 2026: 10,691,384 sharesAug 14, 2026: 10,825,920 sharesAug 31, 2026: 9,823,486 sharesSep 15, 2026: 10,507,241 sharesSep 30, 2026: 10,511,530 sharesOct 15, 2026: 9,641,514 sharesOct 30, 2026: 10,099,424 shares
Short interest in PTLO by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 202610.1M+457.9K+4.8%1.78M5.67
Oct 15, 20269.64M−870.0K−8.3%2.18M4.42
Sep 30, 202610.5M+4.29K0.0%1.58M6.67
Sep 15, 202610.5M+683.8K+7.0%1.28M8.21
Aug 31, 20269.82M−1.00M−9.3%1.12M8.76
Aug 14, 202610.8M+134.5K+1.3%1.62M6.69
Jul 31, 202610.7M+572.8K+5.7%1.02M10.51
Jul 15, 202610.1M−111.2K−1.1%1.10M9.19
Jun 30, 202610.2M−1.11M−9.8%1.46M6.98
Jun 15, 202611.3M+1.42M+14.3%1.60M7.10
May 29, 20269.92M−193.6K−1.9%1.69M5.86
May 15, 202610.1M+1.07M+11.9%2.94M3.44
Apr 30, 20269.04M−672.7K−6.9%1.49M6.08
Apr 15, 20269.71M−565.7K−5.5%1.10M8.81
Mar 31, 202610.3M−358.5K−3.4%1.27M8.12
Mar 13, 202610.6M−583.7K−5.2%1.29M8.26
Feb 27, 202611.2M−605.3K−5.1%1.41M7.97
Feb 13, 202611.8M+107.1K+0.9%1.51M7.84
Jan 30, 202611.7M−1.35M−10.3%2.21M5.30
Jan 15, 202613.1M−1.09M−7.7%3.14M4.16
Dec 31, 202514.2M+510.3K+3.7%2.47M5.73
Dec 15, 202513.6M−390.6K−2.8%2.11M6.46
Nov 28, 202514.0M−215.5K−1.5%2.30M6.10
Nov 14, 202514.2M+1.80M+14.5%3.22M4.42
Oct 31, 202512.5M+1.03M+9.0%3.50M3.56
Oct 15, 202511.4M+282.2K+2.5%2.98M3.83
Sep 30, 202511.1M+103.1K+0.9%2.97M3.74
Sep 15, 202511.0M+29.1K+0.3%4.03M2.74
Aug 29, 202511.0M+2.73M+33.0%3.14M3.50
Aug 15, 20258.27M−1.27M−13.3%5.11M1.62
Jul 31, 20259.54M+117.9K+1.3%2.42M3.93
Jul 15, 20259.42M+343.7K+3.8%2.02M4.66
Jun 30, 20259.07M−825.4K−8.3%1.66M5.46
Jun 13, 20259.90M+901.0K+10.0%1.57M6.31
May 30, 20259.00M−1.18M−11.6%2.27M3.97
May 15, 202510.2M−242.2K−2.3%2.32M4.39
Apr 30, 202510.4M−293.0K−2.7%1.83M5.68
Apr 15, 202510.7M−354.3K−3.2%1.70M6.29
Mar 31, 202511.1M+1.35M+13.9%1.36M8.12
Mar 14, 20259.72M+536.4K+5.8%1.39M6.99
Feb 28, 20259.18M+519.3K+6.0%2.59M3.54
Feb 14, 20258.66M+176.4K+2.1%1.40M6.20
Jan 31, 20258.48M+676.9K+8.7%1.78M4.76
Jan 15, 20257.81M−313.9K−3.9%1.99M3.92
Dec 31, 20248.12M+1.17M+16.8%1.79M4.54
Dec 13, 20246.96M−2.11K0.0%1.29M5.38
Nov 29, 20246.96M−1.17M−14.4%1.16M6.01
Nov 15, 20248.13M−85.5K−1.0%1.47M5.55
Oct 31, 20248.22M−153.7K−1.8%822.3K9.99

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 PTLO by settlement date
Settlement dateSharesPriceValue
Oct 13, 20264,346$4.27$18.6K
Oct 6, 20267,461$3.55$26.5K
Oct 5, 20266,992$3.51$24.5K
Sep 30, 202612,016$3.55$42.7K
Sep 29, 2026104,450$3.52$367.7K
Sep 28, 202678,912$3.50$276.2K
Sep 21, 202656,255$3.75$211.0K
Sep 15, 20265,235$4.06$21.3K
Sep 10, 202639,819$4.11$163.7K
Sep 9, 202630,156$4.42$133.3K
Sep 4, 202632$4.40$140.8
Sep 2, 202611,181$4.41$49.3K
Aug 25, 20264$4.98$19.92
Aug 21, 2026392$4.77$1.87K
Aug 17, 202671$5.16$366.36
Aug 10, 20267$4.43$31.01
Jul 28, 20266,840$4.67$31.9K
Jul 24, 20263,088$4.34$13.4K
Jul 22, 20261$4.48$4.48
Jul 13, 20262,644$4.59$12.1K
Jul 9, 202626,827$4.58$122.9K
Jul 8, 202692,381$4.80$443.4K
Jul 7, 2026127$4.72$599.44
Jul 2, 2026189$4.99$943.11
Jul 1, 2026115$4.74$545.1
Jun 30, 20261,148$4.75$5.45K
Jun 29, 2026133,851$4.74$634.5K
Jun 22, 20262,158$4.26$9.19K
Jun 15, 202627,437$4.44$121.8K
Jun 12, 202647,432$4.47$212.0K

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 PTLO by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 2026331,73601,072,56730.9%
Nov 9, 2026253,5330970,15426.1%
Nov 6, 2026361,2017,9021,248,30728.9%
Nov 5, 2026679,9652,2084,296,96115.8%
Nov 4, 2026296,3292001,167,04325.4%
Nov 3, 2026308,93712,571865,74235.7%
Nov 2, 2026327,8843,9981,311,40325.0%
Oct 30, 2026192,877436742,17726.0%
Oct 29, 2026230,0113,0991,011,04622.7%
Oct 28, 2026347,60001,101,40631.6%
Oct 27, 2026257,1610651,65039.5%
Oct 26, 2026180,6660465,51638.8%
Oct 23, 2026234,9331,942572,61241.0%
Oct 22, 2026169,4731,521451,74637.5%
Oct 21, 2026242,5141,111705,79534.4%
Oct 20, 2026356,261277791,89845.0%
Oct 19, 2026332,98612,191866,33538.4%
Oct 16, 2026508,9731,070920,40555.3%
Oct 15, 2026354,7096061,012,14035.0%
Oct 14, 2026442,7096,0431,303,76834.0%
Oct 13, 2026703,2862,9041,777,33339.6%
Oct 12, 2026296,0763,727951,82031.1%
Oct 9, 2026235,4065,867744,58731.6%
Oct 8, 2026282,6197,116917,08430.8%
Oct 7, 2026213,185564607,81635.1%
Oct 6, 2026381,632241784,81948.6%
Oct 5, 2026173,401110494,71235.1%
Oct 2, 2026324,7140955,03734.0%
Oct 1, 2026869,1721001,332,72865.2%
Sep 30, 2026269,2531,000544,78649.4%

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 PTLO
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T21,478,48516,0872,147,56710,39040.8%
Sep 28, 2026T21,963,38221,0653,207,18211,25538.0%
Sep 21, 2026T21,305,14217,9202,351,68810,28535.7%
Sep 14, 2026T21,169,51315,8832,701,53010,59830.2%
Sep 7, 2026T21,081,82918,0181,473,0766,18242.3%
Aug 31, 2026T2877,59414,9451,357,5287,06839.3%
Aug 24, 2026T2832,37413,1632,162,72513,31527.8%
Aug 17, 2026T21,152,88919,4251,335,2415,59946.3%
Aug 10, 2026T21,677,69927,5322,640,9528,88638.8%
Aug 3, 2026T21,105,26822,5922,159,9058,18533.9%
Jul 27, 2026T21,107,90720,2181,295,7256,46646.1%
Jul 20, 2026T2828,46916,351921,4235,20447.3%