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Koppers Holdings Inc.

KOP
Exchange
NYSE
Industry
Lumber & Wood Products (No Furniture)
SEC CIK
0001315257

In the last 90 days, Koppers Holdings Inc. insiders filed 0 open-market purchases and 3 sales; 217 institutions reported holding it in 13F filings for Q2 2026, worth $871.2M 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
719.5K
Shares, settlement Oct 30, 2026
Change
−20.2K
−2.7% vs. Oct 15, 2026
Days to cover
4.73
Short interest ÷ average daily volume
Average daily volume
152.3K
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 296,210 sharesNov 15, 2024: 362,182 sharesNov 29, 2024: 349,715 sharesDec 13, 2024: 396,864 sharesDec 31, 2024: 378,730 sharesJan 15, 2025: 466,072 sharesJan 31, 2025: 518,610 sharesFeb 14, 2025: 600,443 sharesFeb 28, 2025: 618,716 sharesMar 14, 2025: 722,337 sharesMar 31, 2025: 632,083 sharesApr 15, 2025: 629,120 sharesApr 30, 2025: 642,233 sharesMay 15, 2025: 760,575 sharesMay 30, 2025: 941,159 sharesJun 13, 2025: 738,743 sharesJun 30, 2025: 622,462 sharesJul 15, 2025: 515,121 sharesJul 31, 2025: 482,925 sharesAug 15, 2025: 592,610 sharesAug 29, 2025: 905,745 sharesSep 15, 2025: 769,699 sharesSep 30, 2025: 591,320 sharesOct 15, 2025: 609,991 sharesOct 31, 2025: 736,526 sharesNov 14, 2025: 839,509 sharesNov 28, 2025: 1,271,306 sharesDec 15, 2025: 808,495 sharesDec 31, 2025: 848,204 sharesJan 15, 2026: 1,029,377 sharesJan 30, 2026: 1,133,304 sharesFeb 13, 2026: 1,046,320 sharesFeb 27, 2026: 933,491 sharesMar 13, 2026: 945,738 sharesMar 31, 2026: 710,835 sharesApr 15, 2026: 743,863 sharesApr 30, 2026: 861,708 sharesMay 15, 2026: 842,942 sharesMay 29, 2026: 1,066,235 sharesJun 15, 2026: 836,076 sharesJun 30, 2026: 825,039 sharesJul 15, 2026: 753,012 sharesJul 31, 2026: 713,171 sharesAug 14, 2026: 781,631 sharesAug 31, 2026: 950,642 sharesSep 15, 2026: 769,075 sharesSep 30, 2026: 800,969 sharesOct 15, 2026: 739,634 sharesOct 30, 2026: 719,458 shares
Short interest in KOP by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 2026719.5K−20.2K−2.7%152.3K4.73
Oct 15, 2026739.6K−61.3K−7.7%155.0K4.77
Sep 30, 2026801.0K+31.9K+4.2%179.3K4.47
Sep 15, 2026769.1K−181.6K−19.1%162.1K4.75
Aug 31, 2026950.6K+169.0K+21.6%162.8K5.84
Aug 14, 2026781.6K+68.5K+9.6%253.3K3.09
Jul 31, 2026713.2K−39.8K−5.3%156.9K4.55
Jul 15, 2026753.0K−72.0K−8.7%149.4K5.04
Jun 30, 2026825.0K−11.0K−1.3%206.6K3.99
Jun 15, 2026836.1K−230.2K−21.6%168.7K4.96
May 29, 20261.07M+223.3K+26.5%168.0K6.35
May 15, 2026842.9K−18.8K−2.2%227.9K3.70
Apr 30, 2026861.7K+117.8K+15.8%137.7K6.26
Apr 15, 2026743.9K+33.0K+4.7%163.2K4.56
Mar 31, 2026710.8K−234.9K−24.8%309.9K2.29
Mar 13, 2026945.7K+12.2K+1.3%302.9K3.12
Feb 27, 2026933.5K−112.8K−10.8%172.0K5.43
Feb 13, 20261.05M−87.0K−7.7%172.0K6.08
Jan 30, 20261.13M+103.9K+10.1%120.4K9.42
Jan 15, 20261.03M+181.2K+21.4%136.9K7.52
Dec 31, 2025848.2K+39.7K+4.9%145.9K5.81
Dec 15, 2025808.5K−462.8K−36.4%131.3K6.16
Nov 28, 20251.27M+431.8K+51.4%160.5K7.92
Nov 14, 2025839.5K+103.0K+14.0%189.3K4.43
Oct 31, 2025736.5K+126.5K+20.7%141.0K5.22
Oct 15, 2025610.0K+18.7K+3.2%144.5K4.22
Sep 30, 2025591.3K−178.4K−23.2%210.5K2.81
Sep 15, 2025769.7K−136.0K−15.0%170.3K4.52
Aug 29, 2025905.7K+313.1K+52.8%156.2K5.80
Aug 15, 2025592.6K+109.7K+22.7%183.9K3.22
Jul 31, 2025482.9K−32.2K−6.3%118.6K4.07
Jul 15, 2025515.1K−107.3K−17.2%136.0K3.79
Jun 30, 2025622.5K−116.3K−15.7%132.0K4.72
Jun 13, 2025738.7K−202.4K−21.5%113.6K6.51
May 30, 2025941.2K+180.6K+23.7%145.2K6.48
May 15, 2025760.6K+118.3K+18.4%179.7K4.23
Apr 30, 2025642.2K+13.1K+2.1%175.2K3.67
Apr 15, 2025629.1K−2.96K−0.5%165.2K3.81
Mar 31, 2025632.1K−90.3K−12.5%232.9K2.71
Mar 14, 2025722.3K+103.6K+16.8%213.0K3.39
Feb 28, 2025618.7K+18.3K+3.0%199.1K3.11
Feb 14, 2025600.4K+81.8K+15.8%83.8K7.17
Jan 31, 2025518.6K+52.5K+11.3%94.9K5.46
Jan 15, 2025466.1K+87.3K+23.1%136.9K3.40
Dec 31, 2024378.7K−18.1K−4.6%213.3K1.78
Dec 13, 2024396.9K+47.1K+13.5%116.6K3.40
Nov 29, 2024349.7K−12.5K−3.4%126.2K2.77
Nov 15, 2024362.2K+66.0K+22.3%130.1K2.78
Oct 31, 2024296.2K+7.74K+2.7%78.8K3.76

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 KOP by settlement date
Settlement dateSharesPriceValue
Oct 8, 202618$43.88$789.84
Sep 21, 202621,801$45.33$988.2K
Aug 26, 2026618$46.13$28.5K
Aug 25, 20262,292$45.83$105.0K
Aug 12, 2026196$46.01$9.02K
Aug 5, 20261$51.99$51.99
Aug 4, 2026511$50.73$25.9K
Jul 23, 2026169$51.17$8.65K
Jul 22, 2026290$51.47$14.9K
Jul 20, 2026456$49.14$22.4K
Jul 16, 202668$48.47$3.30K
Jul 6, 2026206$46.21$9.52K
Jun 30, 2026840$45.36$38.1K
Jun 29, 20265,630$45.12$254.0K
Jun 17, 20261,949$44.50$86.7K
Jun 15, 20261,068$43.41$46.4K
Jun 11, 202657$41.68$2.38K
Jun 5, 2026145$42.16$6.11K
May 19, 2026679$40.39$27.4K
Apr 17, 2026137$36.98$5.07K
Apr 1, 2026186$38.68$7.19K
Mar 17, 202612,026$38.39$461.7K
Mar 13, 202623,218$37.36$867.4K
Mar 4, 2026282$36.73$10.4K
Mar 2, 2026324$37.80$12.2K
Feb 27, 20261,050$37.24$39.1K
Feb 25, 20262$34.42$68.84
Feb 24, 202633$33.72$1.11K
Feb 23, 2026414$35.11$14.5K
Feb 18, 202611$35.07$385.77

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 KOP by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 202679,901313155,85251.3%
Nov 9, 202672,0651,241120,98259.6%
Nov 6, 2026106,5262,175164,40564.8%
Nov 5, 202622,577039,16557.6%
Nov 4, 202620,718031,49765.8%
Nov 3, 202628,850044,47964.9%
Nov 2, 202623,151034,67766.8%
Oct 30, 202615,276029,90651.1%
Oct 29, 202618,130032,14856.4%
Oct 28, 202629,47121445,13165.3%
Oct 27, 202639,842060,45965.9%
Oct 26, 202621,490030,42470.6%
Oct 23, 202624,944065,53838.1%
Oct 22, 202620,552053,81438.2%
Oct 21, 202637,1340146,71025.3%
Oct 20, 202615,180034,05644.6%
Oct 19, 202622,84921228,58779.9%
Oct 16, 202620,623030,96866.6%
Oct 15, 202621,5026535,49360.6%
Oct 14, 202619,938031,09464.1%
Oct 13, 202622,517038,08359.1%
Oct 12, 202619,363039,02449.6%
Oct 9, 202621,408050,88542.1%
Oct 8, 202630,466055,95354.4%
Oct 7, 202621,051046,71045.1%
Oct 6, 202620,388043,97746.4%
Oct 5, 202623,757071,89433.0%
Oct 2, 202634,132081,00842.1%
Oct 1, 202639,008081,86347.7%
Sep 30, 202625,153038,42765.5%

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 KOP
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T2220,2908,490132,9071,93062.4%
Sep 28, 2026T2207,27310,53877,3061,94872.8%
Sep 21, 2026T2156,1819,80868,9961,58369.4%
Sep 14, 2026T2248,34913,639223,5502,51352.6%
Sep 7, 2026T2128,5599,24498,9161,96156.5%
Aug 31, 2026T2207,59610,579154,4162,44757.3%
Aug 24, 2026T2182,9329,89875,3982,56470.8%
Aug 17, 2026T2211,96511,468159,2041,72157.1%
Aug 10, 2026T2275,65213,699281,8362,59949.4%
Aug 3, 2026T2262,93113,276126,5932,82267.5%
Jul 27, 2026T2140,1919,27282,3571,64863.0%
Jul 20, 2026T2174,8769,87890,4822,32165.9%