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Qualys, Inc.

QLYS
Exchange
Nasdaq
Industry
Services-Prepackaged Software
SEC CIK
0001107843

In the last 90 days, Qualys, Inc. insiders filed 0 open-market purchases and 10 sales; 438 institutions reported holding it in 13F filings for Q2 2026, worth $5.06B 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
3.23M
Shares, settlement Oct 15, 2026
Change
−50.1K
−1.5% vs. Sep 30, 2026
Days to cover
4.95
Short interest ÷ average daily volume
Average daily volume
653.2K
Shares, as reported by FINRA
Short interest by settlement date
Oct 15, 2024: 3,632,728 sharesOct 31, 2024: 3,653,594 sharesNov 15, 2024: 3,183,139 sharesNov 29, 2024: 3,320,005 sharesDec 13, 2024: 3,262,250 sharesDec 31, 2024: 3,228,003 sharesJan 15, 2025: 3,233,153 sharesJan 31, 2025: 3,028,626 sharesFeb 14, 2025: 2,917,104 sharesFeb 28, 2025: 2,628,172 sharesMar 14, 2025: 2,609,997 sharesMar 31, 2025: 2,715,416 sharesApr 15, 2025: 2,664,177 sharesApr 30, 2025: 2,798,987 sharesMay 15, 2025: 2,654,566 sharesMay 30, 2025: 2,839,477 sharesJun 13, 2025: 3,065,265 sharesJun 30, 2025: 2,770,491 sharesJul 15, 2025: 2,948,065 sharesJul 31, 2025: 3,032,109 sharesAug 15, 2025: 2,869,214 sharesAug 29, 2025: 2,818,337 sharesSep 15, 2025: 2,996,221 sharesSep 30, 2025: 2,982,815 sharesOct 15, 2025: 3,221,611 sharesOct 31, 2025: 3,115,054 sharesNov 14, 2025: 3,399,891 sharesNov 28, 2025: 3,165,217 sharesDec 15, 2025: 3,207,038 sharesDec 31, 2025: 3,108,480 sharesJan 15, 2026: 3,273,056 sharesJan 30, 2026: 3,102,311 sharesFeb 13, 2026: 3,028,917 sharesFeb 27, 2026: 2,993,528 sharesMar 13, 2026: 3,046,355 sharesMar 31, 2026: 3,987,298 sharesApr 15, 2026: 4,833,826 sharesApr 30, 2026: 4,712,786 sharesMay 15, 2026: 4,895,484 sharesMay 29, 2026: 4,174,972 sharesJun 15, 2026: 3,632,723 sharesJun 30, 2026: 3,665,654 sharesJul 15, 2026: 3,853,317 sharesJul 31, 2026: 3,730,211 sharesAug 14, 2026: 4,060,077 sharesAug 31, 2026: 3,649,642 sharesSep 15, 2026: 3,465,960 sharesSep 30, 2026: 3,284,204 sharesOct 15, 2026: 3,234,118 shares
Short interest in QLYS by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 15, 20263.23M−50.1K−1.5%653.2K4.95
Sep 30, 20263.28M−181.8K−5.2%673.1K4.88
Sep 15, 20263.47M−183.7K−5.0%813.8K4.26
Aug 31, 20263.65M−410.4K−10.1%536.6K6.80
Aug 14, 20264.06M+329.9K+8.8%883.1K4.60
Jul 31, 20263.73M−123.1K−3.2%729.2K5.12
Jul 15, 20263.85M+187.7K+5.1%781.8K4.93
Jun 30, 20263.67M+32.9K+0.9%948.6K3.86
Jun 15, 20263.63M−542.2K−13.0%664.6K5.47
May 29, 20264.17M−720.5K−14.7%703.7K5.93
May 15, 20264.90M+182.7K+3.9%860.4K5.69
Apr 30, 20264.71M−121.0K−2.5%849.3K5.55
Apr 15, 20264.83M+846.5K+21.2%1.02M4.76
Mar 31, 20263.99M+940.9K+30.9%732.2K5.45
Mar 13, 20263.05M+52.8K+1.8%547.8K5.56
Feb 27, 20262.99M−35.4K−1.2%863.8K3.47
Feb 13, 20263.03M−73.4K−2.4%969.3K3.12
Jan 30, 20263.10M−170.7K−5.2%422.6K7.34
Jan 15, 20263.27M+164.6K+5.3%359.8K9.10
Dec 31, 20253.11M−98.6K−3.1%457.8K6.79
Dec 15, 20253.21M+41.8K+1.3%365.6K8.77
Nov 28, 20253.17M−234.7K−6.9%320.5K9.88
Nov 14, 20253.40M+284.8K+9.1%653.7K5.20
Oct 31, 20253.12M−106.6K−3.3%289.4K10.76
Oct 15, 20253.22M+238.8K+8.0%357.4K9.01
Sep 30, 20252.98M−13.4K−0.5%316.1K9.44
Sep 15, 20253.00M+177.9K+6.3%295.2K10.15
Aug 29, 20252.82M−50.9K−1.8%295.2K9.55
Aug 15, 20252.87M−162.9K−5.4%408.5K7.02
Jul 31, 20253.03M+84.0K+2.9%273.2K11.10
Jul 15, 20252.95M+177.6K+6.4%314.1K9.39
Jun 30, 20252.77M−294.8K−9.6%336.7K8.23
Jun 13, 20253.07M+225.8K+8.0%277.2K11.06
May 30, 20252.84M+184.9K+7.0%295.8K9.60
May 15, 20252.65M−144.4K−5.2%376.6K7.05
Apr 30, 20252.80M+134.8K+5.1%286.1K9.78
Apr 15, 20252.66M−51.2K−1.9%399.3K6.67
Mar 31, 20252.72M+105.4K+4.0%304.5K8.92
Mar 14, 20252.61M−18.2K−0.7%277.6K9.40
Feb 28, 20252.63M−288.9K−9.9%306.0K8.59
Feb 14, 20252.92M−111.5K−3.7%399.6K7.30
Jan 31, 20253.03M−204.5K−6.3%357.5K8.47
Jan 15, 20253.23M+5.15K+0.2%403.1K8.02
Dec 31, 20243.23M−34.2K−1.1%307.6K10.49
Dec 13, 20243.26M−57.8K−1.7%283.3K11.51
Nov 29, 20243.32M+136.9K+4.3%324.0K10.25
Nov 15, 20243.18M−470.5K−12.9%881.9K3.61
Oct 31, 20243.65M+20.9K+0.6%352.2K10.37
Oct 15, 20243.63M+124.1K+3.5%349.0K10.41

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 QLYS by settlement date
Settlement dateSharesPriceValue
Oct 8, 2026366$194.75$71.3K
Oct 5, 2026349$193.00$67.4K
Oct 2, 20261$187.43$187.43
Sep 30, 2026128$178.35$22.8K
Sep 25, 202699$182.94$18.1K
Sep 24, 202650$184.79$9.24K
Sep 21, 2026100$174.96$17.5K
Sep 16, 202693$185.37$17.2K
Sep 2, 20263,672$177.01$650.0K
Aug 14, 202640,471$195.88$7.93M
Aug 11, 202627$185.80$5.02K
Aug 10, 202648$183.48$8.81K
Aug 4, 20266$154.89$929.34
Aug 3, 2026319$144.75$46.2K
Jul 29, 2026133$135.75$18.1K
Jul 27, 20262,856$137.48$392.6K
Jul 17, 202615$157.56$2.36K
Jul 14, 2026100$151.54$15.2K
Jul 13, 202610$152.69$1.53K
Jul 9, 20263$153.54$460.62
Jul 7, 2026362$158.26$57.3K
Jul 2, 20262,530$143.44$362.9K
Jun 30, 202643,077$128.32$5.53M
Jun 26, 2026956$116.19$111.1K
Jun 22, 2026218$111.30$24.3K
Jun 18, 202615$112.18$1.68K
Jun 16, 2026332$114.65$38.1K
Jun 12, 2026387$110.83$42.9K
Jun 8, 2026617$109.90$67.8K
Jun 4, 2026276$111.61$30.8K

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 QLYS by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 9, 2026218,4040387,62556.3%
Nov 6, 2026338,504108470,59771.9%
Nov 5, 2026273,41071370,91573.7%
Nov 4, 2026135,2910219,51061.6%
Nov 3, 2026122,732241222,58355.1%
Nov 2, 2026227,8981,518338,80467.3%
Oct 30, 2026255,1430332,27976.8%
Oct 29, 2026264,280201331,62479.7%
Oct 28, 2026172,5380285,12260.5%
Oct 27, 2026213,2625,561329,98264.6%
Oct 26, 2026326,0834,181465,54270.0%
Oct 23, 2026398,4621,000578,41168.9%
Oct 22, 2026434,088400517,44383.9%
Oct 21, 2026270,9250314,92286.0%
Oct 20, 2026128,5530191,39567.2%
Oct 19, 2026229,7640275,33483.4%
Oct 16, 2026297,3790369,14680.6%
Oct 15, 2026187,7620229,79281.7%
Oct 14, 2026193,32844247,13078.2%
Oct 13, 2026222,8700268,58483.0%
Oct 12, 2026181,92221239,54775.9%
Oct 9, 2026244,7142,300295,31082.9%
Oct 8, 2026265,4300368,78472.0%
Oct 7, 2026258,0910303,98484.9%
Oct 6, 2026208,1341,552264,81678.6%
Oct 5, 2026201,488195247,80681.3%
Oct 2, 2026140,6360184,24476.3%
Oct 1, 2026239,39110294,50881.3%
Sep 30, 2026193,3370250,37477.2%
Sep 29, 2026186,7420221,77284.2%

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 QLYS
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T21,181,78330,412570,17912,32267.5%
Sep 28, 2026T2958,24230,842391,1119,65471.0%
Sep 21, 2026T2738,39530,414545,27511,65657.5%
Sep 14, 2026T21,394,28944,774908,91713,89360.5%
Sep 7, 2026T21,153,32329,907312,5048,20878.7%
Aug 31, 2026T2938,16630,864456,77510,58167.3%
Aug 24, 2026T2847,47830,462326,67910,14972.2%
Aug 17, 2026T2773,17429,971324,9889,37170.4%
Aug 10, 2026T2970,88835,423493,89011,60766.3%
Aug 3, 2026T21,946,75156,318603,01613,23376.4%
Jul 27, 2026T21,307,87339,149303,9256,62581.1%
Jul 20, 2026T21,230,02538,408337,5549,57178.5%