6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of December 2025

Commission File Number: 001-42925

BOYD GROUP SERVICES INC.

(Translation of registrant’s name into English)

1745 Ellice Avenue, Unit C1

Winnipeg, Manitoba, Canada R3H 1A6

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☐   Form 40-F ☒

DOCUMENTS INCLUDED AS PART OF THIS FORM 6-K

Exhibits

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: December 9, 2025

EX-99.1

Exhibit 99.1

Boyd Group Services Inc. Amends Revolving Credit Facilities

Winnipeg, Manitoba – December 9, 2025 – Boyd Group Services Inc. (TSX:BYD; NYSE: BGSI) (“BGSI”, “the Boyd Group”, “Boyd” or the “Company”) today announced that it has amended its existing credit facilities to, among other things, (i) increase its revolving credit facilities to US$675 million, with an accordion feature which can increase the credit facilities to a maximum of US$1.075 billion (the “Facilities”), and (ii) facilitate the Company’s acquisition of Joe Hudson’s Collision Center (the “Acquisition”). The amendments provide more favorable pricing and flexibility while maintaining the existing maturity of August 2030. The existing US$125 million Term Loan A maturing in March 2027 remains unchanged.

The lending institutions participating in the Facilities include The Toronto-Dominion Bank, National Bank of Canada, and Royal Bank of Canada as co-lead arrangers and lenders, as well as Bank of America, The Bank of Nova Scotia and Canadian Imperial Bank of Commerce as lenders.

The Company intends to partially draw upon the amended Facilities, in combination with the proceeds from the Company’s recently completed common share and senior unsecured notes offerings, to finance the Acquisition. The Acquisition continues to progress through the customary closing conditions and regulatory requirements.

About Boyd Group Services Inc.

Boyd Group Services Inc. is a Canadian corporation and controls The Boyd Group Inc. and its subsidiaries. BGSI shares trade on the Toronto Stock Exchange under the symbol BYD and on the New York Stock Exchange under the symbol BGSI.

About The Boyd Group Inc.

The Boyd Group Inc. (“Boyd”) is one of the largest operators of non-franchised collision repair centres in North America in terms of number of locations and sales. Boyd operates locations in Canada under the trade names Boyd Autobody & Glass and Assured Automotive as well as in the U.S. under the trade name Gerber Collision & Glass. In addition, Boyd is a major retail auto glass operator in the U.S. with operations under the trade names Gerber Collision & Glass, Glass America, Auto Glass Service, Auto Glass Authority and Autoglassonly.com. Boyd also operates a third-party administrator, Gerber National Claims Services, that offers glass, emergency roadside and first notice of loss services. Boyd also operates a Mobile Auto Solutions (“MAS”) service that offers scanning and calibration services.

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For further information, please contact:

Investor Relations

Boyd Group

ir@boydgroup.com

Caution concerning forward-looking information

Statements made in this press release constitute “forward-looking information” and “forward-looking statements”within the meaning of applicable Canadian and United States securities laws, including the United States Private Securities Litigation Reform Act of 1995 (collectively, “forward-looking information”). Forward-looking information can begenerally identified by words such as “may”, “will”, “anticipate”, “estimate”, “expect”, “intend”, “continue”, “should”, “believe” or thenegatives thereof and similar variations. Specifically, forward-looking information in this press release includes, but is not limited to, statements regarding the financing and completion of the Acquisition, including the timing thereof. Statementscontaining forward-looking information are not historical facts but instead represent management’s expectations, estimates and projections regarding future events.

Forward-looking information is necessarily based on a number of opinions, assumptions and estimates that, while considered reasonable bythe Company as of the date of this press release, are subject to known and unknown risks, uncertainties and other factors that may cause the actual results or events to be materially different from those expressed or implied by such forward-lookinginformation, including but not limited to the risks and uncertainties detailed under the “Business Risks and Uncertainties” section of the Company’s current annual information form, the “Business Risks andUncertainties” and other sections of the Company’s management’s discussion and analysis of operating results and financial position and in the Company’s other periodic filings with the Canadian securities regulatoryauthorities and the SEC from time to time, available at www.sedarplus.com and www.sec.gov, respectively. These factors are not intended to represent a complete list of the factors that could affect the Company; however, these factors should beconsidered carefully. All forward-looking information presented herein should be considered in conjunction with such filings. Although the Company believes the expectations reflected in such forward-looking information and the assumptions upon whichit is based are reasonable, no assurance can be given that actual results will be consistent with such forward-looking information, and it should not be unduly relied upon. There can be no assurance that such expectations and assumptions will proveto be correct. The forward-looking information contained in this press release describes the expectations of the Company as of the date of this press release. Except as required by law, the Company does not undertake to update or revise anyforward-looking information contained herein, whether as a result of new information, future events or for any other reason. The forward-looking information contained herein is expressly qualified in its entirety by this cautionary statement.