THG Institutional Ownership & Shareholders
HANOVER INSURANCE GROUP INC/ (THG) is currently held by 555 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $6.77B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
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 $882.99M, representing an estimated gain of +16.72% 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
555
Total Reported Value
$6.77B
Largest Holder
Blackrock, Inc.
Largest Position
$756.47M
Insider Transactions (90d)
33
Latest Filing Quarter
Q2 2026
New Institutional Positions
65
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 | $882,985,695 | +$126,514,234 | +16.72% | |
| Vanguard Portfolio Management Llc | 0.02% | 1,919,628 | $411,030,747 | $479,772,626 | +$68,741,879 | +16.72% | |
| Price T Rowe Associates Inc | 0.04% | 1,831,579 | $392,179,000 | $457,766,539 | +$65,587,539 | +16.72% | |
| State Street Corp | 0.01% | 1,627,020 | $348,377,522 | $406,641,109 | +$58,263,587 | +16.72% | |
| Vanguard Capital Management Llc | 0.01% | 1,458,761 | $312,349,905 | $364,588,137 | +$52,238,232 | +16.72% | |
| Aqr Capital Management Llc | 0.10% | 1,341,075 | $287,151,055 | $335,174,875 | +$48,023,820 | +16.72% | |
| Dimensional Fund Advisors Lp | 0.04% | 1,119,928 | $239,810,156 | $279,903,605 | +$40,093,449 | +16.72% | |
| Fuller & Thaler Asset Management, Inc. | 0.64% | 1,089,705 | $233,327,577 | $272,349,971 | +$39,022,394 | +16.72% | |
| American Century Companies Inc | 0.10% | 1,078,105 | $230,844,336 | $269,450,783 | +$38,606,447 | +16.72% | |
| First Trust Advisors Lp | 0.10% | 824,257 | $176,489,894 | $206,006,552 | +$29,516,658 | +16.72% | |
| Alliancebernstein L.P. | 0.05% | 909,130 | $157,597,686 | $227,218,861 | +$69,621,175 | +44.18% | |
| Geode Capital Management, Llc | 0.01% | 729,091 | $156,147,550 | $182,221,714 | +$26,074,164 | +16.70% | |
| Ameriprise Financial Inc | 0.03% | 699,163 | $149,705,058 | $174,741,809 | +$25,036,751 | +16.72% | |
| Massachusetts Financial Services Co | 0.04% | 595,647 | $127,539,936 | $148,870,055 | +$21,330,119 | +16.72% | |
| Charles Schwab Investment Management Inc | 0.01% | 453,309 | $97,062,523 | $113,295,518 | +$16,232,995 | +16.72% | |
| Invesco Ltd. | 0.01% | 452,418 | $96,871,743 | $113,072,831 | +$16,201,088 | +16.72% | |
| Morgan Stanley | 0.01% | 450,920 | $96,551,448 | $112,698,436 | +$16,146,988 | +16.72% | |
| Norges Bank | 0.01% | 447,262 | $95,767,739 | $111,784,192 | +$16,016,453 | +16.72% | |
| Vaughan Nelson Investment Management, L.P. | 0.71% | 372,514 | $79,762,698 | $93,102,424 | +$13,339,726 | +16.72% | |
| London Co Of Virginia | 0.44% | 360,801 | $77,257,243 | $90,174,994 | +$12,917,751 | +16.72% | |
| Northern Trust Corp | 0.01% | 342,036 | $73,236,748 | $85,485,057 | +$12,248,309 | +16.72% | |
| Goldman Sachs Group Inc | 0.01% | 329,424 | $70,536,251 | $82,332,940 | +$11,796,689 | +16.72% | |
| Woodline Partners Lp | 0.21% | 321,972 | $68,940,645 | $80,470,462 | +$11,529,817 | +16.72% | |
| Bank Of New York Mellon Corp | 0.01% | 311,535 | $66,705,853 | $77,861,943 | +$11,156,090 | +16.72% | |
| Qube Research & Technologies Ltd | 0.07% | 310,785 | $66,545,284 | $77,674,495 | +$11,129,211 | +16.72% | |
| Principal Financial Group Inc | 0.03% | 303,760 | $65,046,453 | $75,918,737 | +$10,872,284 | +16.71% | |
| Quantinno Capital Management Lp | 0.07% | 288,499 | $61,773,589 | $72,104,555 | +$10,330,966 | +16.72% | |
| Markel Group Inc. | Thomas Gayner | 0.47% | 281,000 | $60,167,720 | $70,230,330 | +$10,062,610 | +16.72% |
| Nomura Asset Management International Inc. | 0.09% | 272,738 | $58,399,000 | $68,165,408 | +$9,766,408 | +16.72% | |
| Bank Of America Corp | 0.00% | 222,931 | $47,733,885 | $55,717,145 | +$7,983,260 | +16.72% | |
| Vanguard Fiduciary Trust Co | 0.01% | 218,547 | $46,795,284 | $54,621,452 | +$7,826,168 | +16.72% | |
| Allspring Global Investments Holdings, Llc | 0.07% | 202,795 | $43,994,347 | $50,684,554 | +$6,690,207 | +15.21% | |
| Two Sigma Investments, Lp | 0.03% | 180,817 | $38,716,536 | $45,191,593 | +$6,475,057 | +16.72% | |
| Primecap Management Co/Ca/ | 0.02% | 176,740 | $37,843,569 | $44,172,628 | +$6,329,059 | +16.72% | |
| Brown Advisory Inc | 0.06% | 170,252 | $36,454,244 | $42,551,082 | +$6,096,838 | +16.72% | |
| William Blair Investment Management, Llc | 0.10% | 154,277 | $33,033,791 | $38,558,451 | +$5,524,660 | +16.72% | |
| Fmr Llc | 0.00% | 178,622 | $31,071,363 | $44,642,996 | +$13,571,633 | +43.68% | |
| Gotham Asset Management, Llc | 0.07% | 140,954 | $30,181,070 | $35,228,633 | +$5,047,563 | +16.72% | |
| Boston Trust Walden Corp | 0.23% | 135,506 | $29,014,545 | $33,867,015 | +$4,852,470 | +16.72% | |
| Public Employees Retirement Association Of Colorado | 0.10% | 128,613 | $27,539,000 | $32,144,247 | +$4,605,247 | +16.72% | |
| Proshare Advisors Llc | 0.04% | 128,450 | $27,503,713 | $32,103,509 | +$4,599,796 | +16.72% | |
| Interval Partners, Lp | 0.86% | 124,856 | $26,734,167 | $31,205,260 | +$4,471,093 | +16.72% | |
| Altrinsic Global Advisors Llc | 0.94% | 119,083 | $25,498,052 | $29,762,414 | +$4,264,362 | +16.72% | |
| Jpmorgan Chase & Co | 0.00% | 116,100 | $25,244,980 | $29,016,873 | +$3,771,893 | +14.94% | |
| Envestnet Asset Management Inc | 0.01% | 116,460 | $24,936,368 | $29,106,848 | +$4,170,480 | +16.72% | |
| Allianz Asset Management Gmbh | 0.02% | 114,473 | $24,510,959 | $28,610,237 | +$4,099,278 | +16.72% | |
| Ubs Group Ag | 0.00% | 110,164 | $23,588,315 | $27,533,289 | +$3,944,974 | +16.72% | |
| Arbejdsmarkedets Tillaegspension | 0.59% | 107,900 | $23,103,548 | $26,967,447 | +$3,863,899 | +16.72% | |
| Rhumbline Advisers | 0.02% | 99,291 | $21,260,138 | $24,815,800 | +$3,555,662 | +16.72% | |
| Janus Henderson Group Plc | 0.01% | 116,871 | $20,260,959 | $29,209,569 | +$8,948,610 | +44.17% |
Frequently asked questions about THG
Who are the largest institutional holders of THG?
The largest institutional holders of THG reported in the latest SEC Form 13F filings include Blackrock, Inc., Vanguard Portfolio Management Llc, Price T Rowe Associates Inc, State Street Corp, and Vanguard Capital Management Llc. InsiderSet ranks institutional holders by their latest reported THG position.
What is THG institutional ownership?
This page tracks THG positions reported by institutional investment managers through SEC Form 13F. HANOVER INSURANCE GROUP INC/ (THG) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own THG?
InsiderSet currently tracks 555 institutional managers reporting THG holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of THG shareholders.
How much THG stock do institutions own?
Institutional investment managers disclosed approximately $6.77B in THG holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was THG institutional ownership last updated?
The latest THG institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional THG holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its THG position after the reporting date.
Are institutions buying or selling THG?
Institutional buying and selling can be analyzed by comparing THG positions across consecutive 13F reporting periods. InsiderSet's THG Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View THG ownership changes.
How has THG institutional ownership changed over time?
InsiderSet tracks THG institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.