X0306 4 2019-02-22 0000072741 EVERSOURCE ENERGY ES 0001544884 Williams Frederica M C/O EVERSOURCE ENERGY 300 CADWELL DRIVE SPRINGFIELD MA 01104 1 Trustee Common Shares, $5.00 par value 2019-02-22 4 S 0 2501 70.463 D 16825 D Phantom Shares Common Shares, $5.00 par value 1267 1267 D The transaction was executed in multiple trades at prices ranging from $70.450 to $70.470. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. Reporting Person's deferred compensation under the Eversource Deferred Compensation Plan, a non-qualified deferred compensation plan, that is nominally invested as common shares. Each phantom share represents the right to receive one Eversource Energy common share upon a distribution event, following vesting. Additional phantom shares are issued upon the automatic reinvestment of dividend-equivalents exempt from line item reporting under SEC Rule 16a-11. /s/ Kerry J. Tomasevich, attorney-in-fact for Ms. Williams 2019-02-25