X0306 4 2020-02-26 1 0001172052 SAFETY INSURANCE GROUP INC SAFT 0001214337 BEGLEY WILLIAM J JR 20 CUSTOM HOUSE STREET BOSTON MA 02110 0 1 0 0 VP, CFO and Secretary Common Stock 2020-02-26 4 J 0 1407 0 A 13668 D Common Stock 2020-02-26 4 F 0 390 89.899 D 13278 D Common Stock 2020-02-26 4 F 0 131 90.843 D 13147 D Common Stock 2020-02-27 4 F 0 86 85.418 D 13061 D Common Stock 2020-02-27 4 F 0 163 86.839 D 12898 D Common Stock 2020-02-27 4 F 0 143 87.771 D 12755 D Common Stock 2020-02-27 4 F 0 156 88.843 D 12599 D Common Stock 2020-03-02 4 F 0 1137 79.250 D 11462 D Common Stock 2020-03-02 4 F 0 1204 80.916 D 10258 D Common Stock 2020-03-02 4 F 0 746 81.811 D 9512 D Common Stock 2020-03-02 4 F 0 80 82.52 A 9432 D Common Stock 2020-02-28 4 J 0 1868 0 D 7564 D Common Stock 40187 I See Common Stock 35000 I See Represents the difference between performance shares, with a three year performance period, that were granted on February 22, 2017 and actual shares earned at the end of the performance period on December 31, 2019. Final shares were approved by the Compensation Committee on February 26, 2020. Represents securities delivered in payment of a tax liability with respect to vesting of securities issued in accordance with Rule 16b-3. Represents the weighted average sale price of multiple open market same day sales with prices ranging from $89.480 to $90.290 per share. Full information regarding the number of shares sold at each separate price will be provided to the Securities and Exchange Commission or a security holder of the issuer upon request. Represents the weighted average sale price of multiple open market same day sales with prices ranging from $90.550 to $91.070 per share. Full information regarding the number of shares sold at each separate price will be provided to the Securities and Exchange Commission or a security holder of the issuer upon request. Represents the weighted average sale price of multiple open market same day sales with prices ranging from $85.110 to $85.630 per share. Full information regarding the number of shares sold at each separate price will be provided to the Securities and Exchange Commission or a security holder of the issuer upon request. Represents the weighted average sale price of multiple open market same day sales with prices ranging from $86.440 to $87.150 per share. Full information regarding the number of shares sold at each separate price will be provided to the Securities and Exchange Commission or a security holder of the issuer upon request. Represents the weighted average sale price of multiple open market same day sales with prices ranging from $87.570 to $87.840 per share. Full information regarding the number of shares sold at each separate price will be provided to the Securities and Exchange Commission or a security holder of the issuer upon request. Represents the weighted average sale price of multiple open market same day sales with prices ranging from $88.670 to $89.290 per share. Full information regarding the number of shares sold at each separate price will be provided to the Securities and Exchange Commission or a security holder of the issuer upon request. Represents the weighted average sale price of multiple open market same day sales with prices ranging from $79.086 to $80.050 per share. Full information regarding the number of shares sold at each separate price will be provided to the Securities and Exchange Commission or a security holder of the issuer upon request. Represents the weighted average sale price of multiple open market same day sales with prices ranging from $80.380 to $81.310 per share. Full information regarding the number of shares sold at each separate price will be provided to the Securities and Exchange Commission or a security holder of the issuer upon request. Represents the weighted average sale price of multiple open market same day sales with prices ranging from $81.400 to $82.370 per share. Full information regarding the number of shares sold at each separate price will be provided to the Securities and Exchange Commission or a security holder of the issuer upon request. Shares are owned by a trust of which the reporting person is a trustee. Shares are owned by a trust of which the reporting person's spouse is a trustee. Represents shares forefeited upon termination of employment. /s/William J. Begley, Jr. 2020-03-03