Safety Insurance Group (SAFT) holders disclose sub-5% positions in 13G/A

Rhea-AI Filing Summary

Safety Insurance Group, Inc. received an amended Schedule 13G filing (Amendment No. 16) from SRB Corporation, The Plymouth Rock Company Incorporated, and Palisades Safety and Insurance Association, reporting beneficial ownership of its common stock. Each reporting person states beneficial ownership of less than 5% of the outstanding shares.

SRB Corporation reports shared voting and dispositive power over 257,164 shares, or 1.75% of the common stock. The Plymouth Rock Company Incorporated reports shared power over 114,367 shares, or 0.78%. Palisades Safety and Insurance Association reports shared power over 142,797 shares, or 0.97%, all calculated against 14,683,434 shares outstanding as of May 1, 2026. The parties make a joint filing and state that it should not be deemed an affirmation that a Section 13(d) “group” exists.

Key Figures

SRB Corporation beneficial ownership: 257,164 shares (1.75%) Plymouth Rock Company beneficial ownership: 114,367 shares (0.78%) Palisades Safety and Insurance Association ownership: 142,797 shares (0.97%) +2 more

5 metrics

SRB Corporation beneficial ownership 257,164 shares (1.75%) Shared voting and dispositive power over common stock

Plymouth Rock Company beneficial ownership 114,367 shares (0.78%) Shared voting and dispositive power over common stock

Palisades Safety and Insurance Association ownership 142,797 shares (0.97%) Shared voting and dispositive power over common stock

Shares outstanding 14,683,434 shares Common stock outstanding as of May 1, 2026

Sole voting power (each reporting person) 0 shares No sole voting or dispositive power reported

Key Terms

Schedule 13G, beneficial ownership, shared voting power, shared dispositive power, +1 more

5 terms

Schedule 13G regulatory

"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)"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

beneficial ownership regulatory

"each Reporting Person expressly disclaims beneficial ownership of any securities beneficially owned by any other person"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

shared voting power financial

"Shared Voting Power 257,164.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

shared dispositive power financial

"Shared Dispositive Power 257,164.00"

Attorney-in-Fact regulatory

"By: Plymouth Rock Management Company of New Jersey, its Attorney-in-Fact"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 07/29/2026 - 07:03 PM Accepted by SEC EDGAR 07/29/2026 - 07:02 PM Learn about SEC filing dates

FAQ

What does the Schedule 13G/A filing report for Safety Insurance Group (SAFT)?

The filing reports that three related entities collectively report beneficial ownership of Safety Insurance Group common stock, with each holding below 5% of the outstanding shares, and providing detailed voting and dispositive power information.

How many SAFT shares does SRB Corporation report owning in this Schedule 13G/A?

SRB Corporation reports shared voting and dispositive power over 257,164 shares of Safety Insurance Group common stock, representing 1.75% of the class, based on 14,683,434 shares outstanding as of May 1, 2026.

What is The Plymouth Rock Company Incorporated’s reported stake in SAFT?

The Plymouth Rock Company Incorporated reports shared voting and dispositive power over 114,367 shares of Safety Insurance Group common stock, equal to 0.78% of the class, calculated against 14,683,434 shares outstanding as of May 1, 2026.

What percentage of Safety Insurance Group (SAFT) does Palisades Safety and Insurance Association report?

Palisades Safety and Insurance Association reports shared voting and dispositive power over 142,797 shares of Safety Insurance Group common stock, representing 0.97% of the outstanding class, using 14,683,434 shares outstanding as the reference.

Do the reporting persons in this SAFT Schedule 13G/A claim to be a group under Section 13(d)?

They file jointly and state they may be deemed a “group” under Section 13(d)(3), but expressly disclaim that this joint filing is an affirmation that such a group exists for any purpose.

What is the total number of SAFT shares outstanding used to calculate ownership percentages?

All reported ownership percentages are based on 14,683,434 shares of Safety Insurance Group common stock outstanding as of May 1, 2026, as referenced from the company’s Form 10-Q for the quarter ended March 31, 2026.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 16)

Safety Insurance Group, Inc.

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

78648T100

(CUSIP Number)

07/27/2026

(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 257,164.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 257,164.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

257,164.00

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)

1.75 %

12

Type of Reporting Person (See Instructions)

CO

Comment for Type of Reporting Person: *Based on 14,683,434 shares of Common Stock outstanding as of May 1, 2026, as reported in the Issuer's Report on Form 10-Q for the period ended March 31, 2026, filed with the Securities and Exchange Commission on May 8, 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 114,367.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 114,367.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

114,367.00

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)

0.78 %

12

Type of Reporting Person (See Instructions)

CO

Comment for Type of Reporting Person: *Based on 14,683,434 shares of Common Stock outstanding as of May 1, 2026, as reported in the Issuer's Report on Form 10-Q for the period ended March 31, 2026, filed with the Securities and Exchange Commission on May 8, 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 142,797.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 142,797.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

142,797.00

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)

0.97 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: *Based on 14,683,434 shares of Common Stock outstanding as of May 1, 2026, as reported in the Issuer's Report on Form 10-Q for the period ended March 31, 2026, filed with the Securities and Exchange Commission on May 8, 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.: 78648T100
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.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
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:	07/29/2026

The Plymouth Rock Company Incorporated

Signature:	/s/ Andrew A. McElwee, Jr.
Name/Title:	Andrew A. McElwee, Jr., President
Date:	07/29/2026

Palisades Safety and Insurance Association

Signature:	By: Plymouth Rock Management Company of New Jersey, its Attorney-in-Fact
Name/Title:	Stephen G. Kalinsky, President
Date:	07/29/2026

Signature:	/s/ Stephen G. Kalinsky
Name/Title:	Stephen G. Kalinsky, President
Date:	07/29/2026

Exhibit Information

Exhibit A - Joint Filing Agreement