Safety Insurance Group, Inc. reporting persons SRB Corporation, The Plymouth Rock Company Incorporated and Palisades Safety and Insurance Association filed an amended Schedule 13G/A disclosing shared voting and dispositive power over listed common shares. SRB Corporation reports shared power over 1,794,655 shares (12.27%); Palisades Safety and Insurance Association reports 1,017,679 shares (6.96%); The Plymouth Rock Company Incorporated reports 776,976 shares (5.31%). These percentages are based on 14,631,684 shares outstanding as of February 13, 2026, as reported in the issuer's Form 10-K. The filing is a joint statement and notes the parties "may be deemed to be a 'group'" while disavowing affirmative group beneficial ownership.
Positive
None.
Negative
None.
Insights
Joint filing discloses meaningful shared stakes by SRB and affiliated entities in Safety Insurance (SAFT).
The filing lists exact shared voting and dispositive counts for three related reporting persons and ties percentages to February 13, 2026 outstanding shares. The reporting structure shows layered ownership through subsidiaries and an attorney‑in‑fact arrangement.
Key dependencies include whether the Reporting Persons will act in concert; the filing states they "may be deemed to be a 'group'" but disclaims affirmative group ownership. Subsequent disclosures would clarify any coordinated actions.
Key Figures
SRB shared holdings:1,794,655 sharesPalisades holdings:1,017,679 sharesPlymouth Rock holdings:776,976 shares+4 more
7 metrics
SRB shared holdings1,794,655 sharesshared voting/dispositive power reported for SRB Corporation
Palisades holdings1,017,679 sharesshared voting/dispositive power reported for Palisades Safety and Insurance Association
Plymouth Rock holdings776,976 sharesshared voting/dispositive power reported for The Plymouth Rock Company Incorporated
Shares outstanding used14,631,684 sharesshares outstanding as of <date>February 13, 2026</date> (source: issuer's Form 10-K)
SRB percentage12.27%SRB share of class based on outstanding shares as of <date>February 13, 2026</date>
Palisades percentage6.96%Palisades share of class based on outstanding shares as of <date>February 13, 2026</date>
Plymouth Rock percentage5.31%Plymouth Rock share of class based on outstanding shares as of <date>February 13, 2026</date>
What stake does SRB Corporation report in Safety Insurance (SAFT)?
SRB Corporation reports shared voting and dispositive power over 1,794,655 shares, equal to 12.27% of the class. This percentage uses 14,631,684 shares outstanding as of February 13, 2026, per the issuer's Form 10-K.
How much does The Plymouth Rock Company (related) hold in SAFT?
The Plymouth Rock Company Incorporated reports shared voting and dispositive power over 776,976 shares, representing 5.31% of the class based on 14,631,684 shares outstanding as of February 13, 2026.
What does Palisades Safety and Insurance Association disclose in the filing?
Palisades Safety and Insurance Association reports shared voting and dispositive power over 1,017,679 shares, or 6.96% of the class, using the same outstanding‑shares basis of 14,631,684 as of February 13, 2026.
Do the filers state they act as a group for SAFT holdings?
The filing says the Reporting Persons "may be deemed to be a 'group'" under Section 13(d)(3) but expressly disclaims that this joint filing is an affirmation that such a group exists for any purpose.
What basis was used to calculate the ownership percentages?
Percentages are calculated using 14,631,684 shares outstanding as of February 13, 2026, cited from Safety Insurance Group's Form 10-K for the period ended December 31, 2025.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 15)
Safety Insurance Group, Inc.
(Name of Issuer)
Common Stock, par value $0.01 per share
(Title of Class of Securities)
78648T100
(CUSIP Number)
03/31/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
78648T100
1
Names of Reporting Persons
SRB Corporation
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
MASSACHUSETTS
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,794,655.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,794,655.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,794,655.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
12.27 %
12
Type of Reporting Person (See Instructions)
CO
Comment for Type of Reporting Person: *Based on 14,631,684 shares of Common Stock outstanding as of February 13, 2026, as reported in the Issuer's Report on Form 10-K for the period ended December 31, 2025, filed with the Securities and Exchange Commission on February 27, 2026.
SCHEDULE 13G
CUSIP Number(s):
78648T100
1
Names of Reporting Persons
The Plymouth Rock Company Incorporated
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
MASSACHUSETTS
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
776,976.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
776,976.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
776,976.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
5.31 %
12
Type of Reporting Person (See Instructions)
CO
Comment for Type of Reporting Person: *Based on 14,631,684 shares of Common Stock outstanding as of February 13, 2026, as reported in the Issuer's Report on Form 10-K for the period ended December 31, 2025, filed with the Securities and Exchange Commission on February 27, 2026.
SCHEDULE 13G
CUSIP Number(s):
78648T100
1
Names of Reporting Persons
Palisades Safety and Insurance Association
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
NEW JERSEY
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,017,679.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,017,679.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,017,679.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
6.96 %
12
Type of Reporting Person (See Instructions)
OO
Comment for Type of Reporting Person: *Based on 14,631,684 shares of Common Stock outstanding as of February 13, 2026, as reported in the Issuer's Report on Form 10-K for the period ended December 31, 2025, filed with the Securities and Exchange Commission on February 27, 2026.
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Safety Insurance Group, Inc.
(b)
Address of issuer's principal executive offices:
20 Custom House Street, Boston, MA 02110
Item 2.
(a)
Name of person filing:
This statement relates to shares of Common Stock of the Issuer held by the following:
(1) SRB Corporation, a Massachusetts corporation ("SRB"), which is a direct wholly owned subsidiary of The Plymouth Rock Company Incorporated, a Massachusetts corporation ("PRC"). SRB serves as investment manager to each of PRSC, PRAC, PIC, PRHAC, PSIA, HPSIC, HPPCIC and HPPIC (as defined below) and, in such capacity, may be deemed to have voting and dispositive power over the shares held for the accounts of these entities.
(2) PRC, for the accounts of the following entities:
(i) Plymouth Rock Security Corporation, a Massachusetts corporation ("PRSC");
(ii) Plymouth Rock Assurance Corporation, a Massachusetts corporation ("PRAC");
(iii) Pilgrim Insurance Company, a Massachusetts corporation ("PIC"); and
(iv) Plymouth Rock Home Assurance Corporation, a Massachusetts corporation ("PRHAC").
PRSC, PRAC and PRHAC are direct wholly-owned subsidiaries of PRC. PIC is a direct wholly-owned subsidiary of SRB.
(3) Palisades Safety and Insurance Association, a New Jersey reciprocal insurance exchange ("PSIA"), for its own account and for the accounts of the following entities owned by it:
(i)High Point Safety and Insurance Company, a New Jersey corporation ("HPSIC");
(ii)High Point Property and Casualty Insurance Company, a New Jersey corporation ("HPPCIC"); and
(iii) High Point Preferred Insurance Company, a New Jersey corporation ("HPPIC").
HPSIC and HPPIC are direct wholly owned subsidiaries of HPPCIC, which is a direct wholly owned subsidiary of PSIA. Plymouth Rock Management Company of New Jersey, a New Jersey corporation ("PRNJ"), is the attorney-in-fact for PSIA. PRNJ is an indirect wholly owned subsidiary of SRB. SRB, PRC, and PSIA are referred to herein collectively as the "Reporting Persons." The Reporting Persons are making this single, joint filing because they may be deemed to be a "group" within the meaning of Section 13(d)(3) of the Securities Exchange Act of 1934, as amended (the "Act"); this filing shall not, however, be deemed an affirmation that such a group exists for the purposes of the Act or for any other purpose, and each Reporting Person expressly disclaims beneficial ownership of any securities beneficially owned by any other person. The agreement among the Reporting Persons to file jointly is attached hereto as Exhibit A.
(b)
Address or principal business office or, if none, residence:
SRB: 695 Atlantic Avenue, 10th Floor, Boston, MA 02111
PRC: 695 Atlantic Avenue, 6th Floor, Boston, MA 02111
PSIA: 581 Main Street, 4th Floor, Woodbridge, NJ 07095
(c)
Citizenship:
SRB: Massachusetts
PRC: Massachusetts
PSIA: New Jersey
(d)
Title of class of securities:
Common Stock, par value $0.01 per share
(e)
CUSIP No.:
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
The information set forth in Rows 5 through 11 of the cover pages to this Schedule 13G is incorporated herein by reference for each Reporting Person.
(b)
Percent of class:
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
(ii) Shared power to vote or to direct the vote:
(iii) Sole power to dispose or to direct the disposition of:
(iv) Shared power to dispose or to direct the disposition of:
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
Not Applicable
See item 2(a)
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
SRB Corporation
Signature:
/s/ Frederick C. Childs
Name/Title:
Frederick C. Childs, Vice President
Date:
04/13/2026
The Plymouth Rock Company Incorporated
Signature:
/s/ Andrew A. McElwee, Jr.
Name/Title:
Andrew A. McElwee, Jr., President
Date:
04/13/2026
Palisades Safety and Insurance Association
Signature:
By: Plymouth Rock Management Company of New Jersey, its Attorney-in-Fact
