HANOVER INSURANCE GROUP INC/ (THG) Institutional Shareholders
HANOVER INSURANCE GROUP INC/ (THG) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $6.79B in THG holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of THG tracked by InsiderSet, reporting ownership valued at approximately $756.47M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $803.07M, representing an estimated gain of +6.16% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 50% of the total disclosed THG value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Portfolio Management Llc, Price T Rowe Associates Inc, and several other long-term asset managers with concentrated positions in HANOVER INSURANCE GROUP INC/ (THG).
This page ranks the largest institutional THG shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
529
Total Reported Value
$6.79B
Largest Holder
Blackrock, Inc.
Largest Position
$756.47M
Insider Transactions (90d)
32
Latest Filing Quarter
Q2 2026
New Institutional Positions
51
Funds Exiting Positions
1
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 3,532,932 | $756,471,461 | $803,070,773 | +$46,599,312 | +6.16% | |
| Vanguard Portfolio Management Llc | 0.02% | 1,919,628 | $411,030,747 | $436,350,641 | +$25,319,894 | +6.16% | |
| Price T Rowe Associates Inc | 0.04% | 1,831,579 | $392,179,000 | $416,336,222 | +$24,157,222 | +6.16% | |
| State Street Corp | 0.01% | 1,627,020 | $348,377,522 | $369,837,916 | +$21,460,394 | +6.16% | |
| Vanguard Capital Management Llc | 0.01% | 1,458,761 | $312,349,905 | $331,590,963 | +$19,241,058 | +6.16% | |
| Aqr Capital Management Llc | 0.10% | 1,341,075 | $287,151,055 | $304,839,758 | +$17,688,703 | +6.16% | |
| Fuller & Thaler Asset Management, Inc. | 0.64% | 1,089,705 | $233,327,577 | $247,700,844 | +$14,373,267 | +6.16% | |
| American Century Companies Inc | 0.10% | 1,078,105 | $230,844,336 | $245,064,048 | +$14,219,712 | +6.16% | |
| Dimensional Fund Advisors Lp | 0.04% | 1,030,544 | $220,662,316 | $234,252,957 | +$13,590,641 | +6.16% | |
| First Trust Advisors Lp | 0.10% | 824,257 | $176,489,894 | $187,361,859 | +$10,871,965 | +6.16% | |
| Alliancebernstein L.P. | 0.05% | 909,130 | $157,597,686 | $206,654,340 | +$49,056,654 | +31.13% | |
| Geode Capital Management, Llc | 0.01% | 729,091 | $156,147,550 | $165,729,675 | +$9,582,125 | +6.14% | |
| Ameriprise Financial Inc | 0.03% | 699,163 | $149,705,058 | $158,926,742 | +$9,221,684 | +6.16% | |
| Massachusetts Financial Services Co | 0.04% | 595,647 | $127,539,936 | $135,396,520 | +$7,856,584 | +6.16% | |
| Charles Schwab Investment Management Inc | 0.01% | 453,309 | $97,062,523 | $103,041,669 | +$5,979,146 | +6.16% | |
| Invesco Ltd. | 0.01% | 452,418 | $96,871,743 | $102,839,136 | +$5,967,393 | +6.16% | |
| Morgan Stanley | 0.01% | 450,920 | $96,551,448 | $102,498,625 | +$5,947,177 | +6.16% | |
| Norges Bank | 0.01% | 447,262 | $95,767,739 | $101,667,125 | +$5,899,386 | +6.16% | |
| Vaughan Nelson Investment Management, L.P. | 0.71% | 372,514 | $79,762,698 | $84,676,157 | +$4,913,459 | +6.16% | |
| London Co Of Virginia | 0.44% | 360,801 | $77,257,243 | $82,013,675 | +$4,756,432 | +6.16% | |
| Northern Trust Corp | 0.01% | 342,036 | $73,236,748 | $77,748,203 | +$4,511,455 | +6.16% | |
| Allspring Global Investments Holdings, Llc | 0.11% | 333,520 | $72,293,796 | $75,812,431 | +$3,518,635 | +4.87% | |
| Goldman Sachs Group Inc | 0.01% | 329,424 | $70,536,251 | $74,881,369 | +$4,345,118 | +6.16% | |
| Bank Of New York Mellon Corp | 0.01% | 324,496 | $69,481,152 | $73,761,186 | +$4,280,034 | +6.16% | |
| Woodline Partners Lp | 0.21% | 321,972 | $68,940,645 | $73,187,455 | +$4,246,810 | +6.16% | |
| Qube Research & Technologies Ltd | 0.07% | 310,785 | $66,545,284 | $70,644,538 | +$4,099,254 | +6.16% | |
| Quantinno Capital Management Lp | 0.07% | 288,499 | $61,773,589 | $65,578,708 | +$3,805,119 | +6.16% | |
| Principal Financial Group Inc | 0.03% | 284,718 | $60,968,712 | $64,719,249 | +$3,750,537 | +6.15% | |
| Markel Group Inc. | 0.46% | 281,000 | $60,167,720 | $63,874,110 | +$3,706,390 | +6.16% | |
| Nomura Asset Management International Inc. | 0.09% | 272,738 | $58,399,000 | $61,996,075 | +$3,597,075 | +6.16% | |
| Bank Of America Corp | 0.00% | 222,931 | $47,733,885 | $50,674,446 | +$2,940,561 | +6.16% | |
| Vanguard Fiduciary Trust Co | 0.01% | 218,547 | $46,795,284 | $49,677,919 | +$2,882,635 | +6.16% | |
| Two Sigma Investments, Lp | 0.03% | 180,817 | $38,716,536 | $41,101,512 | +$2,384,976 | +6.16% | |
| Primecap Management Co/Ca/ | 0.02% | 176,740 | $37,843,569 | $40,174,769 | +$2,331,200 | +6.16% | |
| Brown Advisory Inc | 0.06% | 170,252 | $36,454,244 | $38,699,982 | +$2,245,738 | +6.16% | |
| William Blair Investment Management, Llc | 0.10% | 154,277 | $33,033,791 | $35,068,705 | +$2,034,914 | +6.16% | |
| Arbejdsmarkedets Tillaegspension | 0.69% | 147,109 | $31,498,979 | $33,439,347 | +$1,940,368 | +6.16% | |
| Proshare Advisors Llc | 0.05% | 146,672 | $31,405,408 | $33,340,012 | +$1,934,604 | +6.16% | |
| Gotham Asset Management, Llc | 0.07% | 140,954 | $30,181,070 | $32,040,254 | +$1,859,184 | +6.16% | |
| Boston Trust Walden Corp | 0.23% | 138,180 | $29,587,101 | $31,409,696 | +$1,822,595 | +6.16% | |
| Public Employees Retirement Association Of Colorado | 0.10% | 128,613 | $27,539,000 | $29,235,021 | +$1,696,021 | +6.16% | |
| Interval Partners, Lp | 0.86% | 124,856 | $26,734,167 | $28,381,017 | +$1,646,850 | +6.16% | |
| Altrinsic Global Advisors Llc | 0.94% | 119,083 | $25,498,052 | $27,068,757 | +$1,570,705 | +6.16% | |
| Jpmorgan Chase & Co | 0.00% | 116,100 | $25,244,980 | $26,390,691 | +$1,145,711 | +4.54% | |
| Envestnet Asset Management Inc | 0.01% | 116,460 | $24,936,368 | $26,472,523 | +$1,536,155 | +6.16% | |
| Allianz Asset Management Gmbh | 0.02% | 114,473 | $24,510,959 | $26,020,858 | +$1,509,899 | +6.16% | |
| Ubs Group Ag | 0.00% | 110,164 | $23,588,315 | $25,041,379 | +$1,453,064 | +6.16% | |
| Rhumbline Advisers | 0.02% | 99,291 | $21,260,138 | $22,569,837 | +$1,309,699 | +6.16% | |
| Janus Henderson Group Plc | 0.01% | 116,871 | $20,260,959 | $26,565,947 | +$6,304,988 | +31.12% | |
| Aptus Capital Advisors, Llc | 0.14% | 91,287 | $19,546,373 | $20,750,448 | +$1,204,075 | +6.16% |
Frequently asked questions about THG
Who owns the most THG stock?
The largest holders of THG are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for HANOVER INSURANCE GROUP INC/ (THG).
Is THG widely held by superinvestors?
Many widely followed stocks like THG appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly THG is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.