Argo Group International (ARGO-PA) 10-Q 2020 Q3 Quarterly report

Exhibit 32.1

Certification of CEO Pursuant to

18 U.S.C. Section 1350,

as Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report on Form 10-Q of Argo Group International Holdings, Ltd. (the “Company”) for the quarterly period ended September 30, 2020 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Kevin J. Rehnberg, as President and Chief Executive Officer of the Company, hereby certifies, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that, to the best of his knowledge:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

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Certified this 4th day of November 2020	/s/ Kevin J. Rehnberg
	Kevin J. Rehnberg
	President and Chief Executive Officer