Safety Insurance Group, Inc.
DE ˙ DB ˙ US78648T1007
58,50 € ↑0,50 (0,86%)
2026-06-05
DEL PRIS
SecurityDE:SFN / Safety Insurance Group, Inc.
InstitutionRhumbline Advisers
Latest Disclosed Ownership41,060 shares
Latest Disclosed Value $ 2,982,581
Rhumbline Advisers reports 2.20% increase in ownership of SFN / Safety Insurance Group, Inc.

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 41,060 shares of Safety Insurance Group, Inc. (DE:SFN) valued at $2,545,720 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 40,177 shares of Safety Insurance Group, Inc.. This represents a change in shares of 2.20% during the quarter. The current value of the position is $2,402,010 USD.

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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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)
2026-05-12 2026-03-31 13F SAFETY INS GROUP INC COM COM 78648T100 41,060 883 2.20 2,983 -4.73 0.0026
2026-02-13 2025-12-31 13F SAFETY INS GROUP INC COM COM 78648T100 40,177 -3,702 -8.44 3,130 0.94 0.0025
2025-11-06 2025-09-30 13F SAFETY INS GROUP INC COM COM 78648T100 43,879 -1,696 -3.72 3,102 -14.29 0.0025
2025-08-12 2025-06-30 13F SAFETY INS GROUP INC COM COM 78648T100 45,575 1,435 3.25 3,618 3.94 0.0031
2025-05-29 2025-03-31 13F/A-1 SAFETY INS GROUP INC COM COM 78648T100 44,140 -2,067 -4.47 3,482 -8.56 0.0033
2025-04-08 2025-03-31 13F SAFETY INS GROUP INC COM COM 78648T100 44,140 -2,067 3,482 0.0033
2025-05-29 2024-12-31 13F/A-1 SAFETY INS GROUP INC COM COM 78648T100 46,207 413 0.90 3,807 1.66 0.0034
2025-01-30 2024-12-31 13F SAFETY INS GROUP INC COM COM 78648T100 46,207 413 3,807 0.0034
2024-11-12 2024-09-30 13F SAFETY INS GROUP INC COM COM 78648T100 45,794 -604 -1.30 3,745 7.58 0.0034
2024-08-01 2024-06-30 13F SAFETY INS GROUP INC COM COM 78648T100 46,398 -785 -1.66 3,481 -10.21 0.0033
2024-05-09 2024-03-31 13F SAFETY INS GROUP INC COM COM 78648T100 47,183 -111 -0.23 3,878 7.90 0.0037
2024-02-08 2023-12-31 13F SAFETY INS GROUP INC COM COM 78648T100 47,294 1,067 2.31 3,594 13.99 0.0038
2023-11-09 2023-09-30 13F SAFETY INS GROUP INC COM COM 78648T100 46,227 -579 -1.24 3,152 -6.08 0.0037
2023-08-08 2023-06-30 13F SAFETY INS GROUP INC COM COM 78648T100 46,806 38 0.08 3,357 111,766.67 0.0038
2023-05-11 2023-03-31 13F SAFETY INS GROUP INC COM COM 78648T100 46,768 2,732 6.20 3 -99.92 0.0043
2023-02-14 2022-12-31 13F SAFETY INS GROUP INC COM COM 78648T100 44,036 -899 -2.00 3,710 1.23 0.0050
2022-11-10 2022-09-30 13F SAFETY INS GROUP INC COM COM 78648T100 44,935 2,512 5.92 3,665 -11.02 0.0055
2022-08-11 2022-06-30 13F SAFETY INS GROUP INC COM COM 78648T100 42,423 695 1.67 4,119 8.65 0.0060
2022-05-12 2022-03-31 13F SAFETY INS GROUP INC COM COM 78648T100 41,728 -296 -0.70 3,791 6.10 0.0049
2022-02-10 2021-12-31 13F SAFETY INS GROUP INC COM COM 78648T100 42,024 -85 -0.20 3,573 7.07 0.0044
2021-11-12 2021-09-30 13F SAFETY INS GROUP INC COM COM 78648T100 42,109 -5,389 -11.35 3,337 -10.25 0.0045
2021-08-05 2021-06-30 13F SAFETY INS GROUP INC COM COM 78648T100 47,498 -2,139 -4.31 3,718 -11.10 0.0049
2021-05-06 2021-03-31 13F SAFETY INS GROUP INC COM COM 78648T100 49,637 113 0.23 4,182 8.40 0.0057
2021-02-10 2020-12-31 13F SAFETY INS GROUP INC COM COM 78648T100 49,524 5,115 11.52 3,858 25.75 0.0053
2020-11-12 2020-09-30 13F SAFETY INS GROUP INC COM COM 78648T100 44,409 -3,736 -7.76 3,068 -16.45 0.0048
2020-08-13 2020-06-30 13F SAFETY INS GROUP INC COM COM 78648T100 48,145 -4,390 -8.36 3,672 -17.22 0.0061
2020-05-06 2020-03-31 13F SAFETY INS GROUP INC COM COM 78648T100 52,535 2,243 4.46 4,436 -4.68 0.0093
2020-02-05 2019-12-31 13F SAFETY INS GROUP INC COM COM 78648T100 50,292 2,337 4.87 4,654 -4.22 0.0078
2019-10-23 2019-09-30 13F SAFETY INS GROUP INC COM COM 78648T100 47,955 2,855 6.33 4,859 13.26 0.0089
2019-08-14 2019-06-30 13F SAFETY INS GROUP INC COM COM 78648T100 45,100 1,317 3.01 4,290 12.45 0.0081
2019-05-01 2019-03-31 13F SAFETY INS GROUP INC COM COM 78648T100 43,783 603 1.40 3,815 7.98 0.0074
2019-01-31 2018-12-31 13F SAFETY INS GROUP INC COM COM 78648T100 43,180 7,479 20.95 3,533 10.44 0.0077
2018-11-07 2018-09-30 13F SAFETY INS GROUP INC COM COM 78648T100 35,701 -1,149 -3.12 3,199 1.65 0.0062
2018-08-06 2018-06-30 13F SAFETY INS GROUP INC COM COM 78648T100 36,850 881 2.45 3,147 13.86 0.0063
2018-05-02 2018-03-31 13F SAFETY INS GROUP INC COM COM 78648T100 35,969 -1,124 -3.03 2,764 -7.31 0.0058
2018-02-09 2017-12-31 13F SAFETY INS GROUP INC COM COM 78648T100 37,093 5,108 15.97 2,982 22.21 0.0061
2017-11-06 2017-09-30 13F SAFETY INS GROUP INC COM COM 78648T100 31,985 1,370 4.47 2,440 16.69 0.0053
2017-08-02 2017-06-30 13F SAFETY INS GROUP INC COM COM 78648T100 30,615 -710 -2.27 2,091 -4.78 0.0048
2017-05-02 2017-03-31 13F SAFETY INS GROUP INC COM COM 78648T100 31,325 8,404 36.67 2,196 30.02 0.0051
2017-01-27 2016-12-31 13F SAFETY INS GROUP INC COM COM 78648T100 22,921 -1,092 -4.55 1,689 4.65 0.0043
2016-11-08 2016-09-30 13F SAFETY INS GROUP INC COM COM 78648T100 24,013 920 3.98 1,614 13.50 0.0044
2016-08-11 2016-06-30 13F SAFETY INS GROUP INC COM COM 78648T100 23,093 -5,472 -19.16 1,422 -12.76 0.0042
2016-05-02 2016-03-31 13F SAFETY INSURANCE GROUP INC COM COM 78648T100 28,565 2,430 9.30 1,630 10.66 0.0051
2016-02-03 2015-12-31 13F SAFETY INSURANCE GROUP INC COM COM 78648T100 26,135 635 2.49 1,473 6.66 0.0047
2015-11-04 2015-09-30 13F SAFETY INSURANCE GROUP INC COM COM 78648T100 25,500 -6,298 -19.81 1,381 -24.74 0.0047
2015-08-04 2015-06-30 13F SAFETY INSURANCE GROUP INC COM COM 78648T100 31,798 370 1.18 1,835 -2.29 0.0058
2015-05-12 2015-03-31 13F SAFETY INSURANCE GROUP INC COM COM 78648T100 31,428 -2,400 -7.09 1,878 -13.26 0.0054
2015-02-06 2014-12-31 13F SAFETY INSURANCE GROUP INC COM COM 78648T100 33,828 1,675 5.21 2,165 24.93 0.0063
2014-11-12 2014-09-30 13F SAFETY INSURANCE GROUP INC COM COM 78648T100 32,153 -5,450 -14.49 1,733 -10.30 0.0052
2014-08-06 2014-06-30 13F SAFETY INSURANCE GROUP INC COM COM 78648T100 37,603 -1,510 -3.86 1,932 -8.26 0.0057
2014-05-06 2014-03-31 13F SAFETY INSURANCE GROUP INC COM COM 78648T100 39,113 2,430 6.62 2,106 1.99 0.0062
2014-02-03 2013-12-31 13F SAFETY INSURANCE GROUP INC COM COM 78648T100 36,683 -1,100 -2.91 2,065 3.20 0.0061
2013-11-05 2013-09-30 13F SAFETY INSURANCE GROUP INC COM COM 78648T100 37,783 1,181 3.23 2,001 12.67 0.0062
2013-08-07 2013-06-30 13F SAFETY INSURANCE GROUP INC COM COM 78648T100 36,602 36,602 1,776 0.0057
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.