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Tower Semiconductor Ltd

TSEM
Exchange
Nasdaq
Industry
Semiconductors & Related Devices
SEC CIK
0000928876

In the last 90 days, Tower Semiconductor Ltd insiders filed 0 open-market purchases and 1 sale; 458 institutions reported holding it in 13F filings for Q2 2026, worth $16.4B in total; superinvestors ARK Invest and Maverick Capital hold 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
4.73M
Shares, settlement Oct 30, 2026
Change
−629.0K
−11.7% vs. Oct 15, 2026
Days to cover
1.68
Short interest ÷ average daily volume
Average daily volume
2.81M
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 1,089,613 sharesNov 15, 2024: 1,241,062 sharesNov 29, 2024: 1,590,475 sharesDec 13, 2024: 1,497,195 sharesDec 31, 2024: 1,297,449 sharesJan 15, 2025: 1,187,206 sharesJan 31, 2025: 1,191,443 sharesFeb 14, 2025: 1,708,851 sharesFeb 28, 2025: 2,171,194 sharesMar 14, 2025: 2,437,564 sharesMar 31, 2025: 2,038,423 sharesApr 15, 2025: 1,925,618 sharesApr 30, 2025: 1,924,163 sharesMay 15, 2025: 1,763,724 sharesMay 30, 2025: 1,906,714 sharesJun 13, 2025: 1,630,769 sharesJun 30, 2025: 1,441,196 sharesJul 15, 2025: 1,361,440 sharesJul 31, 2025: 1,465,213 sharesAug 15, 2025: 1,364,719 sharesAug 29, 2025: 1,776,823 sharesSep 15, 2025: 1,635,176 sharesSep 30, 2025: 1,445,261 sharesOct 15, 2025: 1,394,311 sharesOct 31, 2025: 1,582,768 sharesNov 14, 2025: 1,979,014 sharesNov 28, 2025: 2,093,103 sharesDec 15, 2025: 2,940,933 sharesDec 31, 2025: 2,790,012 sharesJan 15, 2026: 2,441,012 sharesJan 30, 2026: 1,999,346 sharesFeb 13, 2026: 2,356,279 sharesFeb 27, 2026: 1,763,503 sharesMar 13, 2026: 2,110,499 sharesMar 31, 2026: 3,792,718 sharesApr 15, 2026: 4,411,835 sharesApr 30, 2026: 2,936,045 sharesMay 15, 2026: 3,274,577 sharesMay 29, 2026: 2,900,385 sharesJun 15, 2026: 2,637,271 sharesJun 30, 2026: 2,517,608 sharesJul 15, 2026: 2,715,406 sharesJul 31, 2026: 2,464,837 sharesAug 14, 2026: 2,503,211 sharesAug 31, 2026: 2,521,750 sharesSep 15, 2026: 2,705,350 sharesSep 30, 2026: 4,567,523 sharesOct 15, 2026: 5,355,761 sharesOct 30, 2026: 4,726,788 shares
Short interest in TSEM by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 20264.73M−629.0K−11.7%2.81M1.68
Oct 15, 20265.36M+788.2K+17.3%2.06M2.60
Sep 30, 20264.57M+1.86M+68.8%2.35M1.94
Sep 15, 20262.71M+183.6K+7.3%1.33M2.04
Aug 31, 20262.52M+18.5K+0.7%1.23M2.04
Aug 14, 20262.50M+38.4K+1.6%2.46M1.02
Jul 31, 20262.46M−250.6K−9.2%1.57M1.57
Jul 15, 20262.72M+197.8K+7.9%1.98M1.37
Jun 30, 20262.52M−119.7K−4.5%1.73M1.45
Jun 15, 20262.64M−263.1K−9.1%1.90M1.39
May 29, 20262.90M−374.2K−11.4%2.12M1.37
May 15, 20263.27M+338.5K+11.5%2.50M1.31
Apr 30, 20262.94M−1.48M−33.5%2.67M1.10
Apr 15, 20264.41M+619.1K+16.3%2.52M1.75
Mar 31, 20263.79M+1.68M+79.7%4.66M1.00
Mar 13, 20262.11M+347.0K+19.7%2.22M1.00
Feb 27, 20261.76M−592.8K−25.2%1.45M1.22
Feb 13, 20262.36M+356.9K+17.9%3.13M1.00
Jan 30, 20262.00M−441.7K−18.1%1.62M1.24
Jan 15, 20262.44M−349.0K−12.5%1.50M1.63
Dec 31, 20252.79M−150.9K−5.1%1.16M2.40
Dec 15, 20252.94M+847.8K+40.5%1.82M1.62
Nov 28, 20252.09M+114.1K+5.8%1.63M1.29
Nov 14, 20251.98M+396.2K+25.0%2.34M1.00
Oct 31, 20251.58M+188.5K+13.5%1.02M1.56
Oct 15, 20251.39M−51.0K−3.5%943.3K1.48
Sep 30, 20251.45M−189.9K−11.6%1.03M1.41
Sep 15, 20251.64M−141.6K−8.0%1.47M1.11
Aug 29, 20251.78M+412.1K+30.2%1.91M1.00
Aug 15, 20251.36M−100.5K−6.9%1.04M1.31
Jul 31, 20251.47M+103.8K+7.6%779.7K1.88
Jul 15, 20251.36M−79.8K−5.5%798.1K1.71
Jun 30, 20251.44M−189.6K−11.6%726.3K1.98
Jun 13, 20251.63M−275.9K−14.5%473.7K3.44
May 30, 20251.91M+143.0K+8.1%396.1K4.81
May 15, 20251.76M−160.4K−8.3%606.3K2.91
Apr 30, 20251.92M−1.46K−0.1%503.6K3.82
Apr 15, 20251.93M−112.8K−5.5%859.7K2.24
Mar 31, 20252.04M−399.1K−16.4%405.5K5.03
Mar 14, 20252.44M+266.4K+12.3%866.7K2.81
Feb 28, 20252.17M+462.3K+27.1%643.1K3.38
Feb 14, 20251.71M+517.4K+43.4%1.05M1.62
Jan 31, 20251.19M+4.24K+0.4%982.3K1.21
Jan 15, 20251.19M−110.2K−8.5%535.2K2.22
Dec 31, 20241.30M−199.7K−13.3%610.2K2.13
Dec 13, 20241.50M−93.3K−5.9%480.4K3.12
Nov 29, 20241.59M+349.4K+28.2%568.0K2.80
Nov 15, 20241.24M+151.4K+13.9%925.3K1.34
Oct 31, 20241.09M+4.26K+0.4%347.8K3.13

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 TSEM by settlement date
Settlement dateSharesPriceValue
Oct 13, 2026614$216.50$132.9K
Oct 9, 202617$228.75$3.89K
Oct 7, 202615$258.41$3.88K
Oct 6, 202623$249.57$5.74K
Oct 2, 202630,640$241.30$7.39M
Sep 30, 20266,436$234.43$1.51M
Sep 21, 2026223$223.60$49.9K
Sep 9, 202637$219.82$8.13K
Sep 8, 202632$222.34$7.11K
Sep 4, 202660$206.16$12.4K
Sep 3, 202660$206.81$12.4K
Sep 2, 202698$199.06$19.5K
Sep 1, 202660$205.05$12.3K
Aug 27, 20265$221.23$1.11K
Aug 24, 2026880$222.59$195.9K
Aug 21, 2026880$223.78$196.9K
Aug 20, 202642$226.46$9.51K
Aug 13, 20267,501$260.31$1.95M
Aug 12, 202675$249.58$18.7K
Aug 11, 20268,289$252.55$2.09M
Aug 7, 202685,638$224.70$19.2M
Aug 6, 2026245$211.14$51.7K
Aug 5, 202618,394$239.53$4.41M
Aug 4, 202691,538$234.32$21.4M
Aug 3, 202643$219.67$9.45K
Jul 20, 2026300$234.10$70.2K
Jul 17, 202691$237.92$21.7K
Jul 14, 2026389$229.68$89.3K
Jul 10, 2026555$226.58$125.8K
Jul 7, 20261,655$218.95$362.4K

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 TSEM by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 2026500,4369842,23959.4%
Nov 9, 2026535,423501,343,20739.9%
Nov 6, 2026543,4088,2371,189,56845.7%
Nov 5, 20261,374,90544,4712,396,98357.4%
Nov 4, 2026822,98126,0701,493,59855.1%
Nov 3, 2026513,757114996,66351.5%
Nov 2, 20261,365,18324,2382,386,13657.2%
Oct 30, 2026824,26121,8391,837,89344.8%
Oct 29, 2026353,749651706,35150.1%
Oct 28, 2026352,9511,197562,06162.8%
Oct 27, 2026713,42601,134,86062.9%
Oct 26, 2026487,6301,6181,114,62543.7%
Oct 23, 2026177,95016,253823,96121.6%
Oct 22, 2026634,5294,3491,292,14949.1%
Oct 21, 2026317,34228,913700,03045.3%
Oct 20, 2026914,97025,5121,706,40353.6%
Oct 19, 2026221,0630627,30435.2%
Oct 16, 2026338,30101,211,55227.9%
Oct 15, 2026625,2011231,092,57757.2%
Oct 14, 2026511,15816909,14156.2%
Oct 13, 2026246,1785643,33538.3%
Oct 12, 2026440,668361874,05950.4%
Oct 9, 2026173,7886,030502,78134.6%
Oct 8, 2026357,70911,184874,54540.9%
Oct 7, 2026303,330234590,61351.4%
Oct 6, 2026634,3771,0591,094,97057.9%
Oct 5, 2026359,9970630,61557.1%
Oct 2, 2026323,33051,027,17731.5%
Oct 1, 2026510,01484858,20259.4%
Sep 30, 2026144,71769298,42948.5%

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 TSEM
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T22,897,06968,842891,28028,88376.5%
Sep 28, 2026T22,531,34455,424848,68825,83374.9%
Sep 21, 2026T22,487,53658,8031,201,98425,04267.4%
Sep 14, 2026T22,951,78761,3342,643,45824,35452.8%
Sep 7, 2026T21,514,22043,747537,48213,69373.8%
Aug 31, 2026T22,541,13663,629832,83123,24175.3%
Aug 24, 2026T22,393,38753,531846,78722,55973.9%
Aug 17, 2026T22,001,15946,804763,79827,10972.4%
Aug 10, 2026T22,430,71258,9911,253,38029,16266.0%
Aug 3, 2026T25,519,582105,1582,151,13042,40772.0%
Jul 27, 2026T23,017,92962,6011,113,84432,98573.0%
Jul 20, 2026T22,115,73551,689880,54223,63670.6%