Plymouth Rock Assurance Corporation

BestLink

AMB #: 001831 NAIC #: 14737 FEIN #: 042800590

Mailing Address
695 Atlantic Avenue
Boston, Massachusetts 02111-2217

United States

Web: www.plymouthrock.com

Phone: 617-720-1620

Fax: 617-951-1662

View Additional Address Information

Administrative Office
695 Atlantic Avenue
Boston, Massachusetts 02111-2217
United States

Domiciliary Address
695 Atlantic Avenue
Boston, Massachusetts 02111-2217
United States

AM Best Rating Unit: AMB #: 018527 - Plymouth Rock Assurance Group

Assigned to insurance companies that have, in our opinion, an excellent ability to meet their ongoing insurance obligations.

View additional news, reports and products for this company.

Based on AM Best's analysis, 050360 - The Plymouth Rock Company Incorporated is the AMB Ultimate Parent and identifies the topmost entity of the corporate structure. View a list of operating insurance entities in this structure.

Best's Credit Ratings

Financial Strength View Definition

Rating (Rating Category): Affiliation Code:	A- (Excellent) p (Pooled)
Outlook (or Implication):	Positive
Action:	Affirmed
Effective Date:	March 03, 2026
Initial Rating Date:	June 30, 1991

Long-Term Issuer Credit View Definition

Rating (Rating Category):	a- (Excellent)
Outlook (or Implication):	Positive
Action:	Affirmed
Effective Date:	March 03, 2026
Initial Rating Date:	June 18, 2007

Financial Size Category View Definition

Financial Size Category:

X (USD 500 Million to Less than 750 Million)

u Denotes Under Review Best's Rating

Best's Credit Rating Analyst

Rating Office: A.M. Best Rating Services, Inc.

Senior Financial Analyst: Lauren Magro

Director: Christopher Draghi, CPCU

Note: See the Disclosure information Form or Press Release below for the office and analyst at the time of the rating event.

Disclosure Information

Disclosure Information Form
View AM Best's Rating Disclosure Form

Press Release
AM Best Revises Outlooks to Positive for Members of Plymouth Rock Assurance Group
March 03, 2026

Rating History

A.M. Best has provided ratings & analysis on this company since 1991.

Financial Strength Rating

Effective Date	Rating
March 03, 2026	A-
January 31, 2025	A-
December 14, 2023	A-
November 17, 2022	A-
October 20, 2021	A-

Long-Term Issuer Credit Rating

Effective Date	Rating
March 03, 2026	a-
January 31, 2025	a-
December 14, 2023	a-
November 17, 2022	a-
October 20, 2021	a-

Best's Credit & Financial Reports

Best's Credit Report - financial data included in Best's Credit Report reflects the data used in determining the current credit rating(s) for AM Best Rating Unit: AMB #: 018527 - Plymouth Rock Assurance Group.

Best's Credit Report - Archive - reports which were released prior to the current Best's Credit Report.

Best's Financial Report - financial data included in Best's Financial Report reflects the most current data available to AM Best, including updated financial exhibits and additional company information, and is available to subscribers of Best's Insurance Reports.

Best's Financial Report - Archive - reports which were released prior to the current Best's Financial Report.

View additional news, reports and products for this company.

Press Releases

Date	Title


Mar 03, 2026	AM Best Revises Outlooks to Positive for Members of Plymouth Rock Assurance Group
Jan 29, 2019	AM Best Removes From Under Review With Negative Implications, Downgrades Credit Ratings of MAPFRE Insurance Company of New York
Nov 13, 2018	A.M. Best Removes from Under Review and Affirms Credit Ratings of 21st Century National Insurance Company
Aug 10, 2018	A.M. Best Upgrades Credit Ratings of Bunker Hill Insurance Group Members
Jun 15, 2018	A.M. Best Places Credit Ratings of MAPFRE Insurance Company of New York Under Review With Negative Implications
Apr 18, 2018	A.M. Best Downgrades Credit Ratings of 21st Century National Insurance Company; Places Under Review With Developing Implications
Jul 13, 2017	A.M. Best Revises Issuer Credit Rating Outlook to Positive for Bunker Hill Ins Group; Assigns Credit Ratings to New Members
Jun 18, 2012	A.M. Best Affirms Ratings of the Members of Plymouth Rock Assurance Group
May 31, 2011	A.M. Best Revises Outlook to Stable for Plymouth Rock Assurance Group and its Members
Jun 09, 2010	A.M. Best Assigns Ratings to Plymouth Rock Assurance Casualty Company

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