The Hanover Insurance Group, Inc.
US ˙ NYSE ˙ US4108671052

SecurityTHG / The Hanover Insurance Group, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership72,803 shares
Latest Disclosed Value $ 13,306,708
Sei Investments Co ownership in THG / The Hanover Insurance Group, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 72,803 shares of The Hanover Insurance Group, Inc. (US:THG) valued at $13,306,204 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 62,972 shares of The Hanover Insurance Group, Inc.. This represents a change in shares of 15.61% during the quarter. The current value of the position is $13,566,839 USD.

Sei Investments Co has a history of taking positions in derivatives of the underlying security (THG) in the form of stock options.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

THG / The Hanover Insurance Group, Inc. Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-02-13 2025-12-31 13F HANOVER INS GROUP COM 410867105 72,803 9,831 15.61 13,307 16.36 0.0131
2025-11-13 2025-09-30 13F HANOVER INS GROUP COM 410867105 62,972 -184 -0.29 11,436 6.57 0.0123
2025-08-14 2025-06-30 13F HANOVER INS GROUP COM 410867105 63,156 -49,133 -43.76 10,730 -45.06 0.0124
2025-05-14 2025-03-31 13F/A-1 HANOVER INS GROUP COM 410867105 112,289 -40,200 -26.36 19,533 -17.17 0.0251
2025-05-13 2025-03-31 13F HANOVER INS GROUP COM 410867105 156,779 4,290 24,832 0.0270
2025-02-11 2024-12-31 13F HANOVER INS GROUP COM 410867105 152,489 -6,169 -3.89 23,582 0.36 0.0303
2024-11-12 2024-09-30 13F HANOVER INS GROUP COM 410867105 158,658 9,919 6.67 23,498 25.93 0.0305
2024-08-13 2024-06-30 13F HANOVER INS GROUP COM 410867105 148,739 10,401 7.52 18,659 -0.94 0.0264
2024-05-07 2024-03-31 13F HANOVER INS GROUP COM 410867105 138,338 3,689 2.74 18,837 15.21 0.0276
2024-02-14 2023-12-31 13F HANOVER INS GROUP COM 410867105 134,649 -25,246 -15.79 16,351 -7.86 0.0262
2023-11-14 2023-09-30 13F HANOVER INS GROUP COM 410867105 159,895 17,022 11.91 17,744 9.88 0.0319
2023-08-11 2023-06-30 13F HANOVER INS GROUP COM 410867105 142,873 -6,602 -4.42 16,150 -15.92 0.0282
2023-05-12 2023-03-31 13F HANOVER INS GROUP COM 410867105 149,475 36,161 31.91 19,208 25.43 0.0357
2023-02-10 2022-12-31 13F HANOVER INS GROUP COM 410867105 113,314 -6,938 -5.77 15,314 -0.62 0.0340
2022-11-14 2022-09-30 13F HANOVER INS GROUP COM 410867105 120,252 8,299 7.41 15,408 -5.87 0.0344
2022-08-15 2022-06-30 13F HANOVER INS GROUP COM 410867105 111,953 58,365 108.91 16,368 104.60 0.0353
2022-05-13 2022-03-31 13F HANOVER INS GROUP COM 410867105 53,588 -131 -0.24 8,000 12.98 0.0161
2022-02-14 2021-12-31 13F HANOVER INS GROUP COM 410867105 53,719 21,444 66.44 7,081 67.80 0.0133
2021-11-12 2021-09-30 13F HANOVER INS GROUP COM 410867105 32,275 -21,979 -40.51 4,220 -42.77 0.0089
2021-08-06 2021-06-30 13F HANOVER INS GROUP COM 410867105 54,254 -1,820 -3.25 7,374 2.86 0.0164
2021-05-12 2021-03-31 13F HANOVER INS GROUP COM 410867105 56,074 -14,300 -20.32 7,169 -13.31 0.0181
2021-02-08 2020-12-31 13F HANOVER INS GROUP COM 410867105 70,374 -10,277 -12.74 8,270 9.17 0.0214
2020-12-04 2020-09-30 13F/A-1 HANOVER INS GROUP COM 410867105 80,651 -8,466 -9.50 7,575 -16.76 0.0219
2020-11-06 2020-09-30 13F HANOVER INS GROUP COM 410867105 86,806 -2,311 8,149 19,620.9802
2020-08-17 2020-06-30 13F/A-1 HANOVER INS GROUP COM 410867105 89,117 1,224 1.39 9,100 14.01 0.0282
2020-08-11 2020-06-30 13F HANOVER INS GROUP COM 410867105 97,964 10,071 12,813 34,755.9445
2020-05-14 2020-03-31 13F HANOVER INS GROUP COM 410867105 87,893 -5,786 -6.18 7,982 -37.60 0.0293
2020-02-06 2019-12-31 13F HANOVER INS GROUP COM 410867105 93,679 -689 -0.73 12,791 0.05 0.0382
2019-11-12 2019-09-30 13F HANOVER INS GROUP COM 410867105 94,368 -6,766 -6.69 12,785 -1.56 0.0327
2019-08-14 2019-06-30 13F HANOVER INS GROUP COM 410867105 101,134 22,657 28.87 12,987 45.32 0.0424
2019-05-15 2019-03-31 13F HANOVER INS GROUP COM 410867105 78,477 8,479 12.11 8,937 3.79 0.0300
2019-02-13 2018-12-31 13F HANOVER INS GROUP COM 410867105 69,998 -9,324 -11.75 8,611 -11.94 0.0307
2018-11-08 2018-09-30 13F HANOVER INS GROUP COM 410867105 79,322 -1,695 -2.09 9,779 0.96 0.0354
2018-08-03 2018-06-30 13F HANOVER INS GROUP COM 410867105 81,017 -666 -0.82 9,686 0.58 0.0329
2018-05-11 2018-03-31 13F HANOVER INS GROUP COM 410867105 81,683 15,845 24.07 9,630 35.33 0.0369
2018-02-08 2017-12-31 13F HANOVER INS GROUP COM 410867105 65,838 -8,922 -11.93 7,116 -1.81 0.0247
2017-11-06 2017-09-30 13F HANOVER INS GROUP COM 410867105 74,760 -7 -0.01 7,247 9.37 0.0258
2017-07-31 2017-06-30 13F HANOVER INS GROUP COM 410867105 74,767 -21,067 -21.98 6,626 -23.22 0.0264
2017-05-05 2017-03-31 13F HANOVER INS GROUP COM 410867105 95,834 -109 -0.11 8,630 -1.17 0.0378
2017-02-02 2016-12-31 13F HANOVER INS GROUP COM 410867105 95,943 15,594 19.41 8,732 44.12 0.0423
2016-11-04 2016-09-30 13F HANOVER INS GROUP COM 410867105 80,349 2,644 3.40 6,059 -7.85 0.0308
2016-08-11 2016-06-30 13F HANOVER INS GROUP COM 410867105 77,705 -10,456 -11.86 6,575 -17.33 0.0394
2016-05-10 2016-03-31 13F/A-1 HANOVER INS GROUP COM 410867105 88,161 -274 -0.31 7,953 10.57 0.0495
2016-02-03 2015-12-31 13F HANOVER INS GROUP COM 410867105 88,435 34,815 64.93 7,193 72.66 0.0438
2015-11-02 2015-09-30 13F/A-1 HANOVER INS GROUP COM 410867105 53,620 -6,206 -10.37 4,166 -5.92 0.0382
2015-10-30 2015-09-30 13F HANOVER INS GROUP COM 410867105 53,620 4,167
2015-08-07 2015-06-30 13F/A-1 HANOVER INS GROUP COM 410867105 59,826 -7,568 -11.23 4,428 -9.45 0.0400
2015-08-04 2015-06-30 13F HANOVER INS GROUP COM 410867105 59,826 -7,568 4,428 0.0400
2015-05-14 2015-03-31 13F/A-1 HANOVER INS GROUP COM 410867105 67,394 434 0.65 4,890 2.39 0.0425
2015-05-01 2015-03-31 13F HANNON ARMSTRONG SUST INFR C PUT 410867105 67,394 67,394 4,890 0.0425
2015-02-10 2014-12-31 13F HANOVER INS GROUP COM 410867105 66,960 66,960 4,776 0.0422
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2015-05-01 2015-03-31 13F HANNON ARMSTRONG SUST INFR C PUT 67,394 4,890 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.