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Hanover Insurance Group, Inc.

THG
Exchange
NYSE
Industry
Fire, Marine & Casualty Insurance
SEC CIK
0000944695

In the last 90 days, Hanover Insurance Group, Inc. insiders filed 0 open-market purchases and 2 sales; 550 institutions reported holding it in 13F filings for Q2 2026, worth $6.84B in total; Markel Group is the only superinvestor holding 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
937.7K
Shares, settlement Oct 30, 2026
Change
−71.2K
−7.1% vs. Oct 15, 2026
Days to cover
3.17
Short interest ÷ average daily volume
Average daily volume
296.0K
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 248,285 sharesNov 15, 2024: 315,456 sharesNov 29, 2024: 211,230 sharesDec 13, 2024: 245,347 sharesDec 31, 2024: 306,839 sharesJan 15, 2025: 363,923 sharesJan 31, 2025: 336,623 sharesFeb 14, 2025: 376,603 sharesFeb 28, 2025: 361,592 sharesMar 14, 2025: 549,843 sharesMar 31, 2025: 469,780 sharesApr 15, 2025: 405,645 sharesApr 30, 2025: 476,900 sharesMay 15, 2025: 427,654 sharesMay 30, 2025: 574,837 sharesJun 13, 2025: 634,765 sharesJun 30, 2025: 639,433 sharesJul 15, 2025: 579,642 sharesJul 31, 2025: 498,696 sharesAug 15, 2025: 569,517 sharesAug 29, 2025: 548,305 sharesSep 15, 2025: 599,832 sharesSep 30, 2025: 659,620 sharesOct 15, 2025: 660,007 sharesOct 31, 2025: 649,788 sharesNov 14, 2025: 677,337 sharesNov 28, 2025: 658,321 sharesDec 15, 2025: 641,942 sharesDec 31, 2025: 673,250 sharesJan 15, 2026: 710,642 sharesJan 30, 2026: 773,593 sharesFeb 13, 2026: 823,844 sharesFeb 27, 2026: 833,866 sharesMar 13, 2026: 836,458 sharesMar 31, 2026: 830,528 sharesApr 15, 2026: 896,793 sharesApr 30, 2026: 818,871 sharesMay 15, 2026: 1,039,109 sharesMay 29, 2026: 1,020,451 sharesJun 15, 2026: 1,112,102 sharesJun 30, 2026: 1,105,692 sharesJul 15, 2026: 1,181,059 sharesJul 31, 2026: 766,139 sharesAug 14, 2026: 688,941 sharesAug 31, 2026: 714,354 sharesSep 15, 2026: 742,877 sharesSep 30, 2026: 1,032,841 sharesOct 15, 2026: 1,008,916 sharesOct 30, 2026: 937,684 shares
Short interest in THG by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 2026937.7K−71.2K−7.1%296.0K3.17
Oct 15, 20261.01M−23.9K−2.3%242.3K4.16
Sep 30, 20261.03M+290.0K+39.0%366.1K2.82
Sep 15, 2026742.9K+28.5K+4.0%255.2K2.91
Aug 31, 2026714.4K+25.4K+3.7%284.1K2.51
Aug 14, 2026688.9K−77.2K−10.1%262.1K2.63
Jul 31, 2026766.1K−414.9K−35.1%370.0K2.07
Jul 15, 20261.18M+75.4K+6.8%332.6K3.55
Jun 30, 20261.11M−6.41K−0.6%371.5K2.98
Jun 15, 20261.11M+91.7K+9.0%312.6K3.56
May 29, 20261.02M−18.7K−1.8%290.5K3.51
May 15, 20261.04M+220.2K+26.9%292.5K3.55
Apr 30, 2026818.9K−77.9K−8.7%263.3K3.11
Apr 15, 2026896.8K+66.3K+8.0%322.4K2.78
Mar 31, 2026830.5K−5.93K−0.7%332.3K2.50
Mar 13, 2026836.5K+2.59K+0.3%267.1K3.13
Feb 27, 2026833.9K+10.0K+1.2%230.1K3.62
Feb 13, 2026823.8K+50.3K+6.5%421.6K1.95
Jan 30, 2026773.6K+63.0K+8.9%460.8K1.68
Jan 15, 2026710.6K+37.4K+5.6%375.8K1.89
Dec 31, 2025673.3K+31.3K+4.9%259.9K2.59
Dec 15, 2025641.9K−16.4K−2.5%242.1K2.65
Nov 28, 2025658.3K−19.0K−2.8%191.8K3.43
Nov 14, 2025677.3K+27.5K+4.2%178.2K3.80
Oct 31, 2025649.8K−10.2K−1.6%252.0K2.58
Oct 15, 2025660.0K+387+0.1%214.6K3.07
Sep 30, 2025659.6K+59.8K+10.0%271.0K2.43
Sep 15, 2025599.8K+51.5K+9.4%208.4K2.88
Aug 29, 2025548.3K−21.2K−3.7%173.0K3.17
Aug 15, 2025569.5K+70.8K+14.2%230.1K2.47
Jul 31, 2025498.7K−80.9K−14.0%300.4K1.66
Jul 15, 2025579.6K−59.8K−9.4%266.5K2.18
Jun 30, 2025639.4K+4.67K+0.7%270.6K2.36
Jun 13, 2025634.8K+59.9K+10.4%201.7K3.15
May 30, 2025574.8K+147.2K+34.4%225.1K2.55
May 15, 2025427.7K−49.2K−10.3%225.4K1.90
Apr 30, 2025476.9K+71.3K+17.6%277.9K1.72
Apr 15, 2025405.6K−64.1K−13.7%329.6K1.23
Mar 31, 2025469.8K−80.1K−14.6%223.7K2.10
Mar 14, 2025549.8K+188.3K+52.1%298.5K1.84
Feb 28, 2025361.6K−15.0K−4.0%230.9K1.57
Feb 14, 2025376.6K+40.0K+11.9%301.0K1.25
Jan 31, 2025336.6K−27.3K−7.5%190.5K1.77
Jan 15, 2025363.9K+57.1K+18.6%180.6K2.01
Dec 31, 2024306.8K+61.5K+25.1%168.9K1.82
Dec 13, 2024245.3K+34.1K+16.2%174.0K1.41
Nov 29, 2024211.2K−104.2K−33.0%190.2K1.11
Nov 15, 2024315.5K+67.2K+27.1%188.7K1.67
Oct 31, 2024248.3K−72.4K−22.6%184.0K1.35

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 THG by settlement date
Settlement dateSharesPriceValue
Oct 13, 2026171$221.65$37.9K
Oct 9, 202656$221.93$12.4K
Sep 25, 2026280$217.93$61.0K
Sep 15, 2026419$231.19$96.9K
Sep 3, 20261$227.12$227.12
Aug 24, 2026200$223.16$44.6K
Aug 20, 20264$218.91$875.64
Jul 21, 202675$214.35$16.1K
Jul 20, 202674$213.23$15.8K
Jun 12, 20269,008$196.07$1.77M
Jun 11, 20266,024$197.39$1.19M
Jun 5, 20268,863$186.99$1.66M
May 29, 202622,992$187.39$4.31M
May 28, 202610,361$191.75$1.99M
May 27, 20269,063$195.87$1.78M
May 15, 202615$191.87$2.88K
May 13, 202651$189.59$9.67K
Apr 6, 20262$176.10$352.2
Mar 17, 20261$173.75$173.75
Mar 13, 20261$174.28$174.28
Feb 9, 202632,156$175.97$5.66M
Feb 2, 202644,000$174.14$7.66M
Dec 16, 202559$186.22$11.0K
Nov 13, 2025249$182.39$45.4K
Oct 31, 2025138$170.26$23.5K
Oct 30, 202517$168.39$2.86K
Oct 3, 202525$182.12$4.55K
Sep 12, 2025101$182.10$18.4K
Aug 18, 2025392$169.60$66.5K
Aug 4, 20258$168.83$1.35K

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 THG by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 202674,395094,69978.6%
Nov 9, 202655,453083,22066.6%
Nov 6, 202663,3075087,41272.4%
Nov 5, 2026133,3490170,73278.1%
Nov 4, 202684,9510114,68974.1%
Nov 3, 2026101,8650154,11166.1%
Nov 2, 2026112,4580186,32160.4%
Oct 30, 202694,9690125,82775.5%
Oct 29, 202697,0780168,37857.7%
Oct 28, 202643,408076,04057.1%
Oct 27, 202670,299426117,81759.7%
Oct 26, 202638,7081658,23866.5%
Oct 23, 202649,095069,56470.6%
Oct 22, 202691,448303161,85456.5%
Oct 21, 202645,346078,92057.5%
Oct 20, 202638,054088,86142.8%
Oct 19, 202632,017050,03664.0%
Oct 16, 202653,017170,40475.3%
Oct 15, 202660,221786,72469.4%
Oct 14, 202648,3641259,97780.6%
Oct 13, 202628,020339,08871.7%
Oct 12, 202631,843042,39375.1%
Oct 9, 202638,758071,03954.6%
Oct 8, 202642,364054,12878.3%
Oct 7, 202670,939085,49383.0%
Oct 6, 202676,246087,20587.4%
Oct 5, 202678,3670106,61773.5%
Oct 2, 202676,5931,569103,73873.8%
Oct 1, 202669,7156100,57069.3%
Sep 30, 202669,7775086,92980.3%

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 THG
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 19, 2026T1360,55618,740182,7516,02066.4%
Oct 12, 2026T1231,54614,12195,7795,52370.7%
Oct 5, 2026T1323,99816,943135,6485,81570.5%
Sep 28, 2026T1323,29021,819145,1116,44069.0%
Sep 21, 2026T1386,62321,825273,0666,45958.6%
Sep 14, 2026T1532,91425,323324,9237,44962.1%
Sep 7, 2026T1282,03916,531104,8564,27772.9%
Aug 31, 2026T1271,75316,574135,7905,30366.7%
Aug 24, 2026T1366,05115,030302,0295,09254.8%
Aug 17, 2026T1402,64918,764207,2705,43966.0%
Aug 10, 2026T1431,12820,272140,6205,09175.4%
Aug 3, 2026T1345,35619,060151,3207,51969.5%