ES

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): February 12, 2026

Commission

File Number

Registrant; State of Incorporation

Address; and Telephone Number

I.R.S. Employer

Identification No.

001-05324

EVERSOURCE

ENERGY

(a Massachusetts voluntary association)

300 Cadwell Drive

Springfield, Massachusetts 01104

Telephone: (800) 286-5000

04-2147929

000-00404 THE

CONNECTICUT LIGHT AND POWER COMPANY

(a Connecticut corporation)

107 Selden Street

Berlin, Connecticut 06037-1616

Telephone: (800) 286-5000

06-0303850

001-02301

NSTAR

ELECTRIC COMPANY

(a Massachusetts corporation)

800 Boylston Street

Boston, Massachusetts 02199

Telephone: (800) 286-5000

04-1278810

001-06392

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

02-0181050

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Registrant Title of each class Trading

Symbol(s)

Name of each exchange on

which registered

Eversource Energy Common Shares, $5.00 par value per share

ES New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth

company

Eversource Energy ¨

The Connecticut Light and Power Company ¨

NSTAR Electric Company ¨

Public Service Company of New Hampshire ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

Eversource Energy ¨

The Connecticut Light and Power Company ¨

NSTAR Electric Company ¨

Public Service Company of New Hampshire ¨

Document Type 8-K

Document Period End Date 2026-02-12

Amendment Flag false

CIK 0000023426

THE CONNECTICUT LIGHT_Written communications ¨

THE CONNECTICUT LIGHT_Soliciting material pursuant to ¨

THE CONNECTICUT LIGHT_Pre-commencement communications pursuant ¨

THE CONNECTICUT LIGHT_Pre-commencement communications pursuant ¨

Document Type 8-K

Document Period End Date 2026-02-12

Amendment Flag false

CIK 0000013372

NSTAR ELECTRIC_Written communications ¨

NSTAR ELECTRIC_Soliciting material pursuant to ¨

NSTAR ELECTRIC_Pre-commencement communications pursuant ¨

NSTAR ELECTRIC_Pre-commencement communications pursuant ¨

CIK 0000315256

Public Service Company_Written communications ¨

Document Type 8-K

Document Period End Date 2026-02-12

Amendment Flag false

Public Service Company_Soliciting material pursuant to ¨

Public Service Company_Pre-commencement communications pursuant ¨

Public Service Company_Pre-commencement communications pursuant ¨

Section 2Financial Information

Item 2.02Results of Operations and Financial Conditions.

On February 12, 2026, Eversource Energy issued a news release announcing its unaudited results of operations for the three- and twelve-month periods ended December 31, 2025 and related financial information for certain of its subsidiaries as of and for the same period. A copy of the news release and related unaudited financial reports are attached as Exhibits 99.1 and 99.2 and are incorporated herein by reference thereto.

The information contained in this Item 2.02, including Exhibits 99.1 and 99.2, shall not be deemed “filed” with the Securities and Exchange Commission (“SEC”) nor incorporated by reference in any registration statement filed by Eversource Energy or any subsidiary thereof under the Securities Act of

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2025-11-04 2025-11-04

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): November 4, 2025

Commission

File Number

Registrant; State of Incorporation

Address; and Telephone Number

I.R.S. Employer

Identification No.

1-5324

EVERSOURCE

ENERGY

(a Massachusetts voluntary association)

300 Cadwell Drive

Springfield, Massachusetts 01104

Telephone: (800) 286-5000

04-2147929

0-00404 THE

CONNECTICUT LIGHT AND POWER COMPANY

(a Connecticut corporation)

107 Selden Street

Berlin, Connecticut 06037-1616

Telephone: (800) 286-5000

06-0303850

1-02301

NSTAR

ELECTRIC COMPANY

(a Massachusetts corporation)

800 Boylston Street

Boston, Massachusetts 02199

Telephone: (800) 286-5000

04-1278810

1-6392

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

02-0181050

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Registrant Title of each class Trading

Symbol(s)

Name of each exchange on

which registered

Eversource Energy Common Shares, $5.00 par value per share

ES New York Stock Exchange

The Connecticut Light and Power Company None N/A N/A

NSTAR Electric Company None N/A N/A

Public Service Company of New Hampshire None N/A N/A

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth

company

Eversource Energy ¨

The Connecticut Light and Power Company ¨

NSTAR Electric Company ¨

Public Service Company of New Hampshire ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

Eversource Energy ¨

The Connecticut Light and Power Company ¨

NSTAR Electric Company ¨

Public Service Company of New Hampshire ¨

Document Type 8-K

Document Period End Date 2025-11-04

Amendment Flag false

CIK 0000023426

THE CONNECTICUT LIGHT_Written communications ¨

THE CONNECTICUT LIGHT_Soliciting material pursuant to ¨

THE CONNECTICUT LIGHT_Pre-commencement communications pursuant ¨

THE CONNECTICUT LIGHT_Pre-commencement communications pursuant ¨

Document Type 8-K

Document Period End Date 2025-11-04

Amendment Flag false

CIK 0000013372

NSTAR ELECTRIC_Written communications ¨

NSTAR ELECTRIC_Soliciting material pursuant to ¨

NSTAR ELECTRIC_Pre-commencement communications pursuant ¨

NSTAR ELECTRIC_Pre-commencement communications pursuant ¨

CIK 0000315256

Public Service Company_Written communications ¨

Document Type 8-K

Document Period End Date 2025-11-04

Amendment Flag false

Public Service Company_Soliciting material pursuant to ¨

Public Service Company_Pre-commencement communications pursuant ¨

Public Service Company_Pre-commencement communications pursuant ¨

Section 2 Financial Information

Item 2.02 Results of Operations and Financial Conditions.

On November 4, 2025, Eversource Energy issued a news release announcing its unaudited results of operations for the third quarter and first nine months ended September 30, 2025, and related financial information for certain of its subsidiaries as of and for the same period. A copy of the news release and related unaudited financial report are attached as Exhibits 99.1 and 99.2, respectively, and are incorporated herein by reference thereto.

The information contained in this Item 2.02, including Exhibits 99.1 and 99.2, shall not be deemed “filed” with the Securities and Exchange Commission (“SEC”) nor

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2025-10-14 2025-10-14

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): October 14, 2025

EVERSOURCE ENERGY

(Exact name of registrant as specified in its charter)

Massachusetts

001-05324

04-2147929

(State or other jurisdiction of incorporation)

(Commission

File Number)

(I.R.S. Employer Identification No.)

300 Cadwell Drive, Springfield, Massachusetts, 01104

(Address of principal executive offices, including zip code)

(800) 286-5000

Registrant’s telephone number, including area code

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol

Name of each exchange on which registered

Common Shares, $5.00 par value per share

ES

New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of the chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of the chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Section 2- Financial Information

Item 2.02 Results of Operations and Financial Condition.

On October 14, 2025, Eversource Energy (“Eversource”) issued a news release providing an update on offshore wind liability including certain unaudited financial information for the three-month period ended September 30, 2025. A copy of the news release is attached as Exhibit 99.1 and is incorporated herein by reference hereto.

The information contained in this Item 2.02, including Exhibit 99.1, shall not be deemed “filed” with the Securities and Exchange Commission (“SEC”) nor incorporated by reference in any registration statement filed by Eversource Energy or any subsidiary thereof under the Securities Act of 1933, as amended (the “Securities Act”), unless specified otherwise.

Section 8 - Other Events

Item 8.01 Other Events.

On September 30, 2024, Eversource sold its interests in in the 132-megawatt South Fork Wind project (“South Fork Wind”), which is operational, and the 704-megawatt Revolution Wind project (“Revolution Wind”), which is under construction, (collectively, the “Offshore Wind Projects”) to affiliates of Global Infrastructure Partners (“GIP”).

As part of the sale of the Offshore Wind Projects, Eversource and GIP agreed to make certain post-closing purchase price adjustments that will impact the final purchase price. Upon closing of the sale, Eversource recorded a $365 million contingent liability as of September 30, 2024, reflecting its estimate of the future obligations under the terms of the sale to GIP. These obligations included an expected cost overrun sharing obligation, an expected obligation to maintain GIP’s internal rate of return, and an obligation for other future costs. Certain payments made in 2025 reduced this liability, which was $296 million as of June 30, 2025. As the Offshore Wind Projects progress and final costs materialize, Eversource continues to review its obligations with respect to the project to determine if any changes to this liability are warranted as Revolution Wind project completes construction.

In the third quarter of 2025, Eversource received an updated report on the construction status of Revolution Wind from GIP that included revised projections of total construction costs. The revised cost projections reflect known and quantifiable cost overruns, including those associated with the impacts of damage to the wind turbine installation vessel, insurance costs and costs incurred as a result of the stop-work order for Revolution Wind received on August 22, 2025 from the Bureau of Ocean Energy Management (“BOEM”) that halted all offshore wind construction activities through September 22, 2025. The aggregate impact of these amounts is currently estimated to be approximately $285 million, which is expected to result in a charge to be recogniz