Exhibit 3.1

CERTIFICATE OF ELIMINATION

OF

7.00% RESETTABLE FIXED RATE PREFERRED STOCK, SERIES A

(REPRESENTED BY DEPOSITARY SHARES, EACH REPRESENTING A 1/1,000TH INTEREST IN A SHARE OF SUCH PREFERRED STOCK)

OF

ARGO GROUP INTERNATIONAL HOLDINGS, INC.

Pursuant to Section 151(g) of the

Delaware General Corporation Law

Argo Group International Holdings, Inc. (the “Company”), a corporation organized and existing under the General Corporation Law of the State of Delaware (the "DGCL"), does hereby certify as follows:

First: Pursuant to the authority expressly vested in the Board of Directors of the Company (the “Board”) by the Amended and Restated Certificate of Incorporation of the Company, as amended and as effective as of the date hereof  (the “Certificate of Incorporation”), the Board previously adopted resolutions creating and authorizing 6,000 shares of 7.00% Resettable Fixed Rate Preferred Stock, Series A of the Company (the “Series A Preferred Stock”), as represented by 6,000,000 depositary shares, each representing a 1/1,000th interest in a share of Series A Preferred Stock (the “Depositary Shares”), subject to the Certificate of Designations of the Series A Preferred Stock (the “Certificate of Designations”), as filed with the Secretary of State of the State of Delaware on September 25, 2024.

Second: None of the authorized shares of the Series A Preferred Stock are outstanding and none will be issued subject to the Certificate of Designations.

Third: Pursuant to the authority conferred upon the Board pursuant to the Certificate of Incorporation, the Board adopted resolutions on September 15, 2025, approving the elimination of the Series A Preferred Stock as set forth herein:

“RESOLVED, that none of the authorized shares of the Series A Preferred Stock are outstanding and none will be issued subject to the Certificate of Designations; and be it further

RESOLVED, that, upon filing the Certificate of Elimination with the Secretary of State of the State of Delaware, all matters set forth in the Certificate of Designations shall be eliminated from the Certificate of Incorporation with respect to the Series A Preferred Stock and the corresponding Depositary Shares; and be it further

RESOLVED, that each of the directors and officers of the Company is hereby authorized and directed, in the name and on behalf of the Company, to prepare, execute, and deliver to the Secretary of State of the State of Delaware the Certificate of Elimination as required by the DGCL in order to effect the cancellation and elimination of the Series A Preferred Stock, and any and all additional documents required to be filed therewith.”

Fourth: In accordance with Section 151(g) of the DGCL, the Certificate of Incorporation as effective immediately prior to the filing of this Certificate of Elimination is hereby amended to eliminate all references to the Series A Preferred Stock.

[Signature page follows.]

IN WITNESS WHEREOF, the Company has caused this Certificate of Elimination to be acknowledged as true in its corporate name under the penalties of perjury and executed by its duly authorized officer this 15th day of September, 2025.

ARGO GROUP INTERNATIONAL HOLDINGS, INC.
By:	/s/ David Chan
	Name: David Chan
	Title:   Chief Financial Officer

[Signature Page to the Certificate of Elimination]