X0306 4/A 2018-12-12 2018-12-14 0 0001091748 Argo Group International Holdings, Ltd. ARGO 0001230556 JOSEPHSON MURAL R ARGO GROUP INTERNATIONAL HOLDINGS, LTD. 110 PITTS BAY ROAD PEMBROKE, HM 08 D0 BERMUDA 1 0 0 0 Common Stock 2018-12-12 4 M 0 7652 19.04 A 19676 D Common Stock 2018-12-12 4 D 0 2109 69.10 D 17567 D Common Stock 2018-12-12 4 S 0 5543 69.0189 D 12024 D Stock Appreciation Rights 19.04 2018-12-12 4 M 0 7652 0.00 D 2019-05-08 Common Stock 7652 0 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.59 to $69.54, inclusive. The reporting person undertakes to provide to Argo Group International Holdings, Ltd., any security holder of Argo Group International Holdings, Ltd., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4. Includes the effect of an adjustment for Argo Group's 10% stock dividends paid on June 17, 2013, March 16, 2015 and June 15, 2016, and Argo Group's 15% stock dividend paid on March 21, 2018 The stock appreciation rights vested on the calendar day immediately preceding Argo Group's 2013 annual general meeting of shareholders. The total reported in Column 5 bas been adjusted to correct an overstatement of total holdings in this and prior filings as a result of the 1:10 reverse share split on August 7, 2007. /s/ Craig S. Comeaux, attorney-in-fact 2019-04-11