X0306 4 2017-11-30 0 0001091748 Argo Group International Holdings, Ltd. AGII 0000315021 BROWNE F SEDGWICK ARGO GROUP INTERNATIONAL HOLDINGS, LTD. 110 PITTS BAY ROAD PEMBROKE, HM 08 D0 BERMUDA 1 0 0 0 Common Stock 2017-11-30 4 M 0 6655 23.11 A 23169 D Common Stock 2017-11-30 4 D 0 1059 61.35 D 22110 D Common Stock 2017-11-30 4 D 0 1452 61.25 D 20658 D Common Stock 2017-11-30 4 S 0 4144 61.2356 D 16514 D Stock Appreciation Rights 23.11 2017-11-30 4 M 0 6655 0.00 D 2018-05-03 Common Stock 6655 0 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $61.20 to $61.30, 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. The stock appreciation rights vested on the calendar day immediately preceding Argo Group's 2012 annual general meeting of shareholders. /s/ Craig S. Comeaux, attorney-in-fact 2017-12-04