Page 1

0 EVERSOURCE UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , D.C. 20549 FORM 10 - K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ENERGY Registrant ; State of Incorporation ; Address ; Telephone Number ; Commission File Number ; and I.R.S. Employer Identification No. EVERSOURCE ENERGY ( a Massachusetts voluntary association ) 300 Cadwell Drive , Springfield , Massachusetts 01104 Telephone : ( 800 ) 286-5000 Commission File Number : 1-5324 I.R.S. Employer Identification No. 04-2147929 THE CONNECTICUT LIGHT AND POWER COMPANY ( a Connecticut corporation ) 107 Selden Street , Berlin , Connecticut 06037-1616 Telephone : ( 800 ) 286-5000 to share Commission File Number : 0-00404 I.R.S. Employer Identification No. 06-0303850 NSTAR ELECTRIC COMPANY ( a Massachusetts corporation ) 800 Boylston Street , Boston , Massachusetts 02199 Telephone : ( 800 ) 286-5000 Commission File Number : 1-02301 I.R.S. Employer Identification No. 04-1278810 PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE ( a New Hampshire corporation ) Energy Park 780 North Commercial Street , Manchester , New Hampshire 03101-1134 Telephone : ( 800 ) 286-5000 Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Common Shares , $ 5.00 par value per Commission File Number : 1-6392 I.R.S. Employer Identification No. 02-0181050 Securities registered pursuant to Section 12 ( g ) of the Act : Trading Symbol ( s ) ES Name of each exchange on which registered New York Stock Exchange