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Donaldson Co Inc

DCI
Exchange
NYSE
Industry
Industrial & Commercial Fans & Blowers & Air Purifing Equip
SEC CIK
0000029644

In the last 90 days, Donaldson Co Inc insiders filed 0 open-market purchases and 2 sales; 633 institutions reported holding it in 13F filings for Q2 2026, worth $9.43B 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
3.34M
Shares, settlement Oct 30, 2026
Change
+63.8K
+2.0% vs. Oct 15, 2026
Days to cover
6.40
Short interest ÷ average daily volume
Average daily volume
521.8K
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 1,411,321 sharesNov 15, 2024: 1,293,868 sharesNov 29, 2024: 1,244,492 sharesDec 13, 2024: 1,321,134 sharesDec 31, 2024: 1,407,420 sharesJan 15, 2025: 1,608,037 sharesJan 31, 2025: 1,862,847 sharesFeb 14, 2025: 2,154,978 sharesFeb 28, 2025: 2,027,274 sharesMar 14, 2025: 2,136,798 sharesMar 31, 2025: 2,317,892 sharesApr 15, 2025: 2,364,425 sharesApr 30, 2025: 2,578,915 sharesMay 15, 2025: 2,516,423 sharesMay 30, 2025: 2,403,614 sharesJun 13, 2025: 2,535,051 sharesJun 30, 2025: 2,462,159 sharesJul 15, 2025: 2,681,907 sharesJul 31, 2025: 2,758,750 sharesAug 15, 2025: 2,719,050 sharesAug 29, 2025: 2,435,470 sharesSep 15, 2025: 2,156,002 sharesSep 30, 2025: 1,886,982 sharesOct 15, 2025: 1,884,111 sharesOct 31, 2025: 1,729,843 sharesNov 14, 2025: 2,280,361 sharesNov 28, 2025: 1,934,726 sharesDec 15, 2025: 1,626,276 sharesDec 31, 2025: 1,707,742 sharesJan 15, 2026: 1,735,610 sharesJan 30, 2026: 1,500,403 sharesFeb 13, 2026: 1,878,625 sharesFeb 27, 2026: 1,783,720 sharesMar 13, 2026: 1,997,939 sharesMar 31, 2026: 2,404,708 sharesApr 15, 2026: 2,638,685 sharesApr 30, 2026: 3,069,870 sharesMay 15, 2026: 3,290,376 sharesMay 29, 2026: 3,744,992 sharesJun 15, 2026: 4,213,725 sharesJun 30, 2026: 3,920,983 sharesJul 15, 2026: 4,189,537 sharesJul 31, 2026: 3,380,639 sharesAug 14, 2026: 3,140,900 sharesAug 31, 2026: 2,738,312 sharesSep 15, 2026: 3,145,580 sharesSep 30, 2026: 3,358,008 sharesOct 15, 2026: 3,274,120 sharesOct 30, 2026: 3,337,949 shares
Short interest in DCI by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 20263.34M+63.8K+2.0%521.8K6.40
Oct 15, 20263.27M−83.9K−2.5%602.7K5.43
Sep 30, 20263.36M+212.4K+6.8%732.3K4.59
Sep 15, 20263.15M+407.3K+14.9%615.9K5.11
Aug 31, 20262.74M−402.6K−12.8%706.1K3.88
Aug 14, 20263.14M−239.7K−7.1%586.4K5.36
Jul 31, 20263.38M−808.9K−19.3%717.6K4.71
Jul 15, 20264.19M+268.6K+6.9%681.3K6.15
Jun 30, 20263.92M−292.7K−7.0%959.8K4.09
Jun 15, 20264.21M+468.7K+12.5%1.04M4.05
May 29, 20263.74M+454.6K+13.8%616.3K6.08
May 15, 20263.29M+220.5K+7.2%516.2K6.37
Apr 30, 20263.07M+431.2K+16.3%634.4K4.84
Apr 15, 20262.64M+234.0K+9.7%545.2K4.84
Mar 31, 20262.40M+406.8K+20.4%722.8K3.33
Mar 13, 20262.00M+214.2K+12.0%728.1K2.74
Feb 27, 20261.78M−94.9K−5.1%1.01M1.77
Feb 13, 20261.88M+378.2K+25.2%796.9K2.36
Jan 30, 20261.50M−235.2K−13.6%736.3K2.04
Jan 15, 20261.74M+27.9K+1.6%621.8K2.79
Dec 31, 20251.71M+81.5K+5.0%751.0K2.27
Dec 15, 20251.63M−308.4K−15.9%844.2K1.93
Nov 28, 20251.93M−345.6K−15.2%700.8K2.76
Nov 14, 20252.28M+550.5K+31.8%654.9K3.48
Oct 31, 20251.73M−154.3K−8.2%549.8K3.15
Oct 15, 20251.88M−2.87K−0.2%425.6K4.43
Sep 30, 20251.89M−269.0K−12.5%665.3K2.84
Sep 15, 20252.16M−279.5K−11.5%629.0K3.43
Aug 29, 20252.44M−283.6K−10.4%911.0K2.67
Aug 15, 20252.72M−39.7K−1.4%453.1K6.00
Jul 31, 20252.76M+76.8K+2.9%508.5K5.43
Jul 15, 20252.68M+219.7K+8.9%513.4K5.22
Jun 30, 20252.46M−72.9K−2.9%611.2K4.03
Jun 13, 20252.54M+131.4K+5.5%677.9K3.74
May 30, 20252.40M−112.8K−4.5%447.1K5.38
May 15, 20252.52M−62.5K−2.4%406.7K6.19
Apr 30, 20252.58M+214.5K+9.1%540.6K4.77
Apr 15, 20252.36M+46.5K+2.0%817.5K2.89
Mar 31, 20252.32M+181.1K+8.5%803.7K2.88
Mar 14, 20252.14M+109.5K+5.4%866.1K2.47
Feb 28, 20252.03M−127.7K−5.9%597.5K3.39
Feb 14, 20252.15M+292.1K+15.7%408.9K5.27
Jan 31, 20251.86M+254.8K+15.9%564.1K3.30
Jan 15, 20251.61M+200.6K+14.3%449.9K3.57
Dec 31, 20241.41M+86.3K+6.5%678.1K2.08
Dec 13, 20241.32M+76.6K+6.2%913.3K1.45
Nov 29, 20241.24M−49.4K−3.8%575.7K2.16
Nov 15, 20241.29M−117.5K−8.3%451.0K2.87
Oct 31, 20241.41M+91.9K+7.0%520.7K2.71

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 DCI by settlement date
Settlement dateSharesPriceValue
Oct 9, 2026659$87.16$57.4K
Oct 8, 2026108$87.26$9.42K
Sep 21, 20264,241$86.44$366.6K
Sep 15, 20268$87.93$703.44
Sep 9, 202623$90.99$2.09K
Sep 8, 202614,395$91.03$1.31M
Sep 2, 20261,683$89.76$151.1K
Aug 19, 20267$93.97$657.79
Aug 10, 202687$98.61$8.58K
Jul 17, 20262$91.11$182.22
Jul 14, 202690$89.28$8.04K
Jul 10, 202693$88.52$8.23K
Jul 8, 202670$89.54$6.27K
Jul 7, 20262$91.37$182.74
Jun 30, 202611,963$88.40$1.06M
Jun 26, 202617$89.11$1.51K
Jun 18, 202617$85.35$1.45K
Jun 15, 2026176$86.40$15.2K
May 26, 20261,309$83.66$109.5K
May 22, 2026700$82.62$57.8K
May 19, 20268$82.46$659.68
May 18, 2026200$81.94$16.4K
May 14, 20262,263$83.93$189.9K
May 12, 20261$85.59$85.59
May 7, 2026801$87.66$70.2K
Apr 27, 2026348$88.96$31.0K
Apr 21, 2026665$89.06$59.2K
Apr 14, 2026449$88.92$39.9K
Apr 13, 202631,248$88.65$2.77M
Apr 1, 2026529$84.87$44.9K

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 DCI by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 202673,22769230,48031.8%
Nov 9, 202687,3824205,67642.5%
Nov 6, 202684,8240213,56439.7%
Nov 5, 2026117,1982,014254,85946.0%
Nov 4, 202672,742236213,77334.0%
Nov 3, 202694,3791,713225,32041.9%
Nov 2, 2026107,34534280,98738.2%
Oct 30, 202684,2520210,91539.9%
Oct 29, 202675,813201208,93836.3%
Oct 28, 202690,67714174,48952.0%
Oct 27, 202674,14228185,32840.0%
Oct 26, 202648,7534122,04839.9%
Oct 23, 202669,1180205,38933.7%
Oct 22, 2026115,197461211,25054.5%
Oct 21, 202665,233152121,55553.7%
Oct 20, 202656,169965128,61843.7%
Oct 19, 202650,5810131,88938.4%
Oct 16, 202665,2810147,82644.2%
Oct 15, 2026101,2900307,74932.9%
Oct 14, 202686,049163176,25448.8%
Oct 13, 202668,41611,192123,45355.4%
Oct 12, 202669,649117131,61052.9%
Oct 9, 202683,104140177,69746.8%
Oct 8, 2026119,5236243,06549.2%
Oct 7, 2026149,7940210,28171.2%
Oct 6, 202682,72294166,17849.8%
Oct 5, 2026122,745431228,58753.7%
Oct 2, 2026111,4791,519220,29450.6%
Oct 1, 2026125,294740243,94751.4%
Sep 30, 202687,5260155,40756.3%

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 DCI
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 19, 2026T1586,60723,222344,9467,21763.0%
Oct 12, 2026T1632,33022,234462,4267,18057.8%
Oct 5, 2026T1731,24629,028471,1768,77460.8%
Sep 28, 2026T1713,40431,084464,1318,38660.6%
Sep 21, 2026T1630,78124,849534,7558,97954.1%
Sep 14, 2026T1960,46829,635794,9978,90354.7%
Sep 7, 2026T1658,42925,003476,1876,97558.0%
Aug 31, 2026T1751,48329,684405,4279,05365.0%
Aug 24, 2026T11,231,33432,629371,8187,77076.8%
Aug 17, 2026T1901,93928,999414,6977,75168.5%
Aug 10, 2026T1681,93025,781226,3585,72875.1%
Aug 3, 2026T11,091,01531,575452,1525,48770.7%