| For the Nine Months Ended September 30, |
|---|
| (Thousands of Dollars) | 2025 | 2024 |
|---|
| Operating Activities: |
|---|
| Net Income | $429,511 | $401,844 |
|---|
| Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities: |
|---|
| Depreciation | 322,815 | 301,968 |
|---|
| Deferred Income Taxes | (84,604) | 149,682 |
|---|
| Uncollectible Expense | 16,105 | 11,432 |
|---|
| Pension, SERP, and PBOP Income, Net | (10,551) | (9,199) |
|---|
| Regulatory Over/(Under) Recoveries, Net | 78,426 | (80,598) |
|---|
| Amortization of Regulatory Assets/(Liabilities), Net | 529,240 | (73,583) |
|---|
| Cost of Removal Expenditures | (44,989) | (46,118) |
|---|
| Other | 33,904 | (41,726) |
|---|
| Changes in Current Assets and Liabilities: |
|---|
| Receivables and Unbilled Revenues, Net | 626 | (134,987) |
|---|
| Taxes Receivable/Accrued, Net | 77,239 | 167,119 |
|---|
| Accounts Payable | (150,690) | (148,366) |
|---|
| Other Current Assets and Liabilities, Net | (69,230) | (107,303) |
|---|
| Net Cash Flows Provided by Operating Activities | 1,127,802 | 390,165 |
|---|
| Investing Activities: |
|---|
| Investments in Property, Plant and Equipment | (657,416) | (759,006) |
|---|
| Net Cash Flows Used in Investing Activities | (657,416) | (759,006) |
|---|
| Financing Activities: |
|---|
| Cash Dividends on Common Stock | (430,000) | (247,600) |
|---|
| Cash Dividends on Preferred Stock | (4,169) | (4,169) |
|---|
| Capital Contributions from Eversource Parent | — | 300,000 |
|---|
| Issuance of Long-Term Debt | 400,000 | 650,000 |
|---|
| Decrease in Notes Payable to Eversource Parent | (280,000) | (322,000) |
|---|
| Other Financing Activities | (4,892) | (8,516) |
|---|
| Net Cash Flows (Used in)/Provided by Financing Activities | (319,061) | 367,715 |
|---|
| Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash | 151,325 | (1,126) |
|---|
| Cash and Restricted Cash - Beginning of Period | 2,109 | 12,243 |
|---|
| Cash, Cash Equivalents and Restricted Cash - End of Period | $153,434 | $11,117 |
|---|
| (Thousands of Dollars) | As of September 30, 2025 | As of December 31, 2024 |
|---|
| ASSETS |
|---|
| Current Assets: |
|---|
| Cash | $18,558 | $911 |
|---|
| Receivables, Net (net of allowance for uncollectible accounts of $117,780 and $114,910 as of September 30, 2025 and December 31, 2024, respectively) | 665,964 | 614,563 |
|---|
| Accounts Receivable from Affiliated Companies | 211,456 | 82,921 |
|---|
| Unbilled Revenues | 48,283 | 59,079 |
|---|
| Materials, Supplies and REC Inventory | 189,111 | 220,621 |
|---|
| Regulatory Assets | 912,343 | 902,770 |
|---|
| Prepayments and Other Current Assets | 55,051 | 72,986 |
|---|
| Total Current Assets | 2,100,766 | 1,953,851 |
|---|
| Property, Plant and Equipment, Net | 14,910,449 | 14,037,828 |
|---|
| Deferred Debits and Other Assets: |
|---|
| Regulatory Assets | 1,117,130 | 1,204,337 |
|---|
| Prepaid Pension and PBOP | 766,906 | 724,661 |
|---|
| Other Long-Term Assets | 253,297 | 154,571 |
|---|
| Total Deferred Debits and Other Assets | 2,137,333 | 2,083,569 |
|---|
| Total Assets | $19,148,548 | $18,075,248 |
|---|
| LIABILITIES AND CAPITALIZATION |
|---|
| Current Liabilities: |
|---|
| Notes Payable | $479,000 | $504,782 |
|---|
| Long-Term Debt – Current Portion | 244,597 | 250,000 |
|---|
| Accounts Payable | 487,385 | 534,868 |
|---|
| Accounts Payable to Affiliated Companies | 163,623 | 153,672 |
|---|
| Obligations to Third Party Suppliers | 158,615 | 163,711 |
|---|
| Regulatory Liabilities | 543,194 | 436,312 |
|---|
| Other Current Liabilities | 157,570 | 202,197 |
|---|
| Total Current Liabilities | 2,233,984 | 2,245,542 |
|---|
| Deferred Credits and Other Liabilities: |
|---|
| Accumulated Deferred Income Taxes | 2,050,260 | 2,005,439 |
|---|
| Regulatory Liabilities | 1,670,310 | 1,643,079 |
|---|
| Other Long-Term Liabilities | 398,444 | 377,462 |
|---|
| Total Deferred Credits and Other Liabilities | 4,119,014 | 4,025,980 |
|---|
| Long-Term Debt | 5,644,983 | 4,844,920 |
|---|
| Preferred Stock Not Subject to Mandatory Redemption | 43,000 | 43,000 |
|---|
| Common Stockholder's Equity: |
|---|
| Common Stock | — | — |
|---|
| Capital Surplus, Paid In | 3,888,842 | 3,788,842 |
|---|
| Retained Earnings | 3,218,867 | 3,127,105 |
|---|
| Accumulated Other Comprehensive Loss | (142) | (141) |
|---|
| Common Stockholder's Equity | 7,107,567 | 6,915,806 |
|---|
| Commitments and Contingencies (Note 9) |
|---|
| Total Liabilities and Capitalization | $19,148,548 | $18,075,248 |
|---|
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
| For the Three Months Ended September 30, | For the Nine Months Ended September 30, |
|---|
| (Thousands of Dollars) | 2025 | 2024 | 2025 | 2024 |
|---|
| Operating Revenues | $1,129,537 | $1,077,523 | $3,012,688 | $2,870,206 |
|---|
| Operating Expenses: |
|---|
| Purchased Power and Transmission | 334,104 | 335,335 | 868,765 | 817,988 |
|---|
| Operations and Maintenance | 195,958 | 189,012 | 538,461 | 526,263 |
|---|
| Depreciation | 113,018 | 104,623 | 330,364 | 301,831 |
|---|
| Amortization of Regulatory Assets, Net | 29,714 | 51,187 | 97,433 | 120,814 |
|---|
| Energy Efficiency Programs | 97,735 | 73,255 | 205,431 | 222,218 |
|---|
| Taxes Other Than Income Taxes | 84,637 | 74,758 | 236,661 | 205,818 |
|---|
| Total Operating Expenses | 855,166 | 828,170 | 2,277,115 | 2,194,932 |
|---|
| Operating Income | 274,371 | 249,353 | 735,573 | 675,274 |
|---|
| Interest Expense | 69,087 | 60,783 | 183,714 | 164,896 |
|---|
| Other Income, Net | 47,074 | 47,489 | 141,082 | 143,024 |
|---|
| Income Before Income Tax Expense | 252,358 | 236,059 | 692,941 | 653,402 |
|---|
| Income Tax Expense | 59,230 | 51,510 | 163,709 | 151,273 |
|---|
| Net Income | $193,128 | $184,549 | $529,232 | $502,129 |
|---|
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
| For the Three Months Ended September 30, | For the Nine Months Ended September 30, |
|---|
| (Thousands of Dollars) | 2025 | 2024 | 2025 | 2024 |
|---|
| Net Income | $193,128 | $184,549 | $529,232 | $502,129 |
|---|
| Other Comprehensive Income/(Loss), Net of Tax: |
|---|
| Changes in Funded Status of SERP Benefit Plan | (4) | (23) | (16) | (67) |
|---|
| Qualified Cash Flow Hedging Instruments | 5 | 5 | 15 | 15 |
|---|
| Other Comprehensive Income/(Loss), Net of Tax | 1 | (18) | (1) | (52) |
|---|
| Comprehensive Income | $193,129 | $184,531 | $529,231 | $502,077 |
|---|
CONDENSED CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
| For the Nine Months Ended September 30, 2025 |
|---|
| Common Stock · CapitalSurplus,Paid In · RetainedEarnings · AccumulatedOtherComprehensiveLoss · TotalCommonStockholder'sEquity |
|---|
| (Thousands of Dollars, Except Stock Information) · Stock · Amount |
|---|
| Balance as of January 1, 2025 | 200 | $— | | $3,788,842 | | $3,127,105 | | $(141) | $6,915,806 |
|---|
| Net Income | | 167,175 | | 167,175 | |
|---|
| Dividends on Preferred Stock | | (490) | | (490) | |
|---|
| Dividends on Common Stock | | (436,000) | | (436,000) | |
|---|
| Capital Contributions from Eversource Parent | | 100,000 | | 100,000 | |
|---|
| Other Comprehensive Loss | | (2) | | (2) | |
|---|
| Balance as of March 31, 2025 | 200 | — | | 3,888,842 | | 2,857,790 | | (143) | 6,746,489 |
|---|
| Net Income | | 168,929 | | 168,929 | |
|---|
| Dividends on Preferred Stock | | (490) | | (490) | |
|---|
| Balance as of June 30, 2025 | 200 | — | | 3,888,842 | | 3,026,229 | | (143) | 6,914,928 |
|---|
| Net Income | | 193,128 | | 193,128 | |
|---|
| Dividends on Preferred Stock | | (490) | | (490) | |
|---|
| Other Comprehensive Income | | 1 | | 1 | |
|---|
| Balance as of September 30, 2025 | 200 | $— | | $3,888,842 | | $3,218,867 | | $(142) | $7,107,567 |
|---|
| For the Nine Months Ended September 30, 2024 |
|---|
| Common Stock · CapitalSurplus,Paid In · RetainedEarnings · AccumulatedOtherComprehensiveIncome/(Loss) · TotalCommonStockholder'sEquity |
|---|
| (Thousands of Dollars, Except Stock Information) · Stock · Amount |
|---|
| Balance as of January 1, 2024 | 200 | $— | | $3,013,842 | | $3,136,612 | | $44 | $6,150,498 |
|---|
| Net Income | | 159,977 | | 159,977 | |
|---|
| Dividends on Preferred Stock | | (490) | | (490) | |
|---|
| Dividends on Common Stock | | (96,700) | | (96,700) | |
|---|
| Capital Contributions from Eversource Parent | | 300,000 | | 300,000 | |
|---|
| Other Comprehensive Loss | | (16) | | (16) | |
|---|
| Balance as of March 31, 2024 | 200 | — | | 3,313,842 | | 3,199,399 | | 28 | 6,513,269 |
|---|
| Net Income | | 157,603 | | 157,603 | |
|---|
| Dividends on Preferred Stock | | (490) | | (490) | |
|---|
| Dividends on Common Stock | | (297,200) | | (297,200) | |
|---|
| Other Comprehensive Loss | | (18) | | (18) | |
|---|
| Balance as of June 30, 2024 | 200 | — | | 3,313,842 | | 3,059,312 | | 10 | 6,373,164 |
|---|
| Net Income | | 184,549 | | 184,549 | |
|---|
| Dividends on Preferred Stock | | (490) | | (490) | |
|---|
| Dividends on Common Stock | | (250,000) | | (250,000) | |
|---|
| Capital Contributions from Eversource Parent | | 75,000 | | 75,000 | |
|---|
| Other Comprehensive Loss | | (18) | | (18) | |
|---|
| Balance as of September 30, 2024 | 200 | $— | | $3,388,842 | | $2,993,371 | | $(8) | $6,382,205 |
|---|
| For the Nine Months Ended September 30, |
|---|
| (Thousands of Dollars) | 2025 | 2024 |
|---|
| Operating Activities: |
|---|
| Net Income | $529,232 | $502,129 |
|---|
| Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities: |
|---|
| Depreciation | 330,364 | 301,831 |
|---|
| Deferred Income Taxes | 12,724 | 55,795 |
|---|
| Uncollectible Expense | 22,176 | 27,746 |
|---|
| Pension, SERP and PBOP Income, Net | (29,734) | (27,053) |
|---|
| Regulatory Over/(Under) Recoveries, Net | 115,301 | (155,869) |
|---|
| Amortization of Regulatory Assets, Net | 97,433 | 120,814 |
|---|
| Cost of Removal Expenditures | (53,517) | (39,590) |
|---|
| Other | (13,957) | (25,224) |
|---|
| Changes in Current Assets and Liabilities: |
|---|
| Receivables and Unbilled Revenues, Net | (160,917) | (152,656) |
|---|
| Taxes Receivable/Accrued, Net | 44,410 | 33,883 |
|---|
| Accounts Payable | (44,814) | (83,599) |
|---|
| Other Current Assets and Liabilities, Net | (27,387) | 14,030 |
|---|
| Net Cash Flows Provided by Operating Activities | 821,314 | 572,237 |
|---|
| Investing Activities: |
|---|
| Investments in Property, Plant and Equipment | (1,210,112) | (1,074,260) |
|---|
| Net Cash Flows Used in Investing Activities | (1,210,112) | (1,074,260) |
|---|
| Financing Activities: |
|---|
| Cash Dividends on Common Stock | (436,000) | (643,900) |
|---|
| Cash Dividends on Preferred Stock | (1,470) | (1,470) |
|---|
| Issuance of Long-Term Debt | 800,000 | 600,000 |
|---|
| Capital Contributions from Eversource Parent | 100,000 | 375,000 |
|---|
| (Decrease)/Increase in Notes Payable | (25,782) | 171,653 |
|---|
| Other Financing Activities | (9,106) | (6,077) |
|---|
| Net Cash Flows Provided by Financing Activities | 427,642 | 495,206 |
|---|
| Net Increase/(Decrease) in Cash and Restricted Cash | 38,844 | (6,817) |
|---|
| Cash and Restricted Cash - Beginning of Period | 9,023 | 22,785 |
|---|
| Cash and Restricted Cash - End of Period | $47,867 | $15,968 |
|---|
| (Thousands of Dollars) | As of September 30, 2025 | As of December 31, 2024 |
|---|
| ASSETS |
|---|
| Current Assets: |
|---|
| Cash | $1,810 | $1,431 |
|---|
| Receivables, Net (net of allowance for uncollectible accounts of $15,507 and $14,090 as of September 30, 2025 and December 31, 2024, respectively) | 205,156 | 163,063 |
|---|
| Accounts Receivable from Affiliated Companies | 30,032 | 27,285 |
|---|
| Unbilled Revenues | 44,087 | 57,226 |
|---|
| Materials, Supplies and REC Inventory | 61,432 | 75,778 |
|---|
| Regulatory Assets | 118,896 | 173,267 |
|---|
| Special Deposits | 19,660 | 32,668 |
|---|
| Prepayments and Other Current Assets | 1,309 | 15,916 |
|---|
| Total Current Assets | 482,382 | 546,634 |
|---|
| Property, Plant and Equipment, Net | 5,401,185 | 5,089,943 |
|---|
| Deferred Debits and Other Assets: |
|---|
| Regulatory Assets | 865,073 | 892,411 |
|---|
| Prepaid Pension and PBOP | 103,081 | 91,005 |
|---|
| Other Long-Term Assets | 20,452 | 21,948 |
|---|
| Total Deferred Debits and Other Assets | 988,606 | 1,005,364 |
|---|
| Total Assets | $6,872,173 | $6,641,941 |
|---|
| LIABILITIES AND CAPITALIZATION |
|---|
| Current Liabilities: |
|---|
| Notes Payable to Eversource Parent | $8,100 | $131,100 |
|---|
| Rate Reduction Bonds – Current Portion | 43,210 | 43,210 |
|---|
| Accounts Payable | 161,101 | 226,074 |
|---|
| Accounts Payable to Affiliated Companies | 47,478 | 45,141 |
|---|
| Obligations to Third Party Suppliers | 35,417 | 1,314 |
|---|
| Accrued Interest | 31,941 | 29,062 |
|---|
| Regulatory Liabilities | 103,599 | 121,058 |
|---|
| Other Current Liabilities | 53,074 | 61,642 |
|---|
| Total Current Liabilities | 483,920 | 658,601 |
|---|
| Deferred Credits and Other Liabilities: |
|---|
| Accumulated Deferred Income Taxes | 803,344 | 781,559 |
|---|
| Regulatory Liabilities | 409,842 | 394,982 |
|---|
| Other Long-Term Liabilities | 45,149 | 43,859 |
|---|
| Total Deferred Credits and Other Liabilities | 1,258,335 | 1,220,400 |
|---|
| Long-Term Debt | 2,030,819 | 1,732,066 |
|---|
| Rate Reduction Bonds | 280,862 | 324,072 |
|---|
| Common Stockholder's Equity: |
|---|
| Common Stock | — | — |
|---|
| Capital Surplus, Paid In | 1,973,134 | 1,898,134 |
|---|
| Retained Earnings | 845,103 | 808,668 |
|---|
| Common Stockholder's Equity | 2,818,237 | 2,706,802 |
|---|
| Commitments and Contingencies (Note 9) |
|---|
| Total Liabilities and Capitalization | $6,872,173 | $6,641,941 |
|---|
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
| For the Three Months Ended September 30, | For the Nine Months Ended September 30, |
|---|
| (Thousands of Dollars) | 2025 | 2024 | 2025 | 2024 |
|---|
| Operating Revenues | $351,219 | $342,027 | $1,002,332 | $955,453 |
|---|
| Operating Expenses: |
|---|
| Purchased Power and Transmission | 67,796 | 44,828 | 187,072 | 169,761 |
|---|
| Operations and Maintenance | 73,755 | 68,981 | 211,760 | 207,336 |
|---|
| Depreciation | 44,049 | 38,865 | 125,820 | 114,401 |
|---|
| Amortization of Regulatory (Liabilities)/Assets, Net | (2,178) | 51,881 | 45,487 | 101,874 |
|---|
| Energy Efficiency Programs | 12,605 | 12,155 | 35,350 | 33,026 |
|---|
| Taxes Other Than Income Taxes | 27,835 | 24,041 | 80,832 | 71,821 |
|---|
| Total Operating Expenses | 223,862 | 240,751 | 686,321 | 698,219 |
|---|
| Operating Income | 127,357 | 101,276 | 316,011 | 257,234 |
|---|
| Interest Expense | 24,098 | 23,223 | 65,171 | 62,676 |
|---|
| Other Income, Net | 9,032 | 8,097 | 33,515 | 22,919 |
|---|
| Income Before Income Tax Expense | 112,291 | 86,150 | 284,355 | 217,477 |
|---|
| Income Tax Expense | 31,050 | 22,353 | 72,920 | 53,880 |
|---|
| Net Income | $81,241 | $63,797 | $211,435 | $163,597 |
|---|
CONDENSED CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
| For the Nine Months Ended September 30, 2025 |
|---|
| Common Stock · CapitalSurplus,Paid In · RetainedEarnings · TotalCommonStockholder'sEquity |
|---|
| (Thousands of Dollars, Except Stock Information) · Stock · Amount |
|---|
| Balance as of January 1, 2025 | 301 | $— | | $1,898,134 | $808,668 | $2,706,802 |
|---|
| Net Income | | 66,279 | 66,279 | |
|---|
| Capital Contributions from Eversource Parent | | 75,000 | | 75,000 | |
|---|
| Balance as of March 31, 2025 | 301 | — | | 1,973,134 | 874,947 | 2,848,081 |
|---|
| Net Income | | 63,915 | 63,915 | |
|---|
| Dividends on Common Stock | | (175,000) | (175,000) | |
|---|
| Balance as of June 30, 2025 | 301 | — | | 1,973,134 | 763,862 | 2,736,996 |
|---|
| Net Income | | 81,241 | 81,241 | |
|---|
| Balance as of September 30, 2025 | 301 | $— | | $1,973,134 | $845,103 | $2,818,237 |
|---|
| For the Nine Months Ended September 30, 2024 |
|---|
| Common Stock · CapitalSurplus,Paid In · RetainedEarnings · TotalCommonStockholder'sEquity |
|---|
| (Thousands of Dollars, Except Stock Information) · Stock · Amount |
|---|
| Balance as of January 1, 2024 | 301 | $— | | $1,698,134 | $655,785 | $2,353,919 |
|---|
| Net Income | | 48,356 | 48,356 | |
|---|
| Capital Contributions from Eversource Parent | | 100,000 | | 100,000 | |
|---|
| Balance as of March 31, 2024 | 301 | — | | 1,798,134 | 704,141 | 2,502,275 |
|---|
| Net Income | | 51,444 | 51,444 | |
|---|
| Dividends on Common Stock | | (62,000) | (62,000) | |
|---|
| Balance as of June 30, 2024 | 301 | — | | 1,798,134 | 693,585 | 2,491,719 |
|---|
| Net Income | | 63,797 | 63,797 | |
|---|
| Capital Contributions from Eversource Parent | | 100,000 | | 100,000 | |
|---|
| Balance as of September 30, 2024 | 301 | $— | | $1,898,134 | $757,382 | $2,655,516 |
|---|
| For the Nine Months Ended September 30, |
|---|
| (Thousands of Dollars) | 2025 | 2024 |
|---|
| Operating Activities: |
|---|
| Net Income | $211,435 | $163,597 |
|---|
| Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities: |
|---|
| Depreciation | 125,820 | 114,401 |
|---|
| Deferred Income Taxes | 15,250 | 72,924 |
|---|
| Uncollectible Expense | 3,871 | 3,420 |
|---|
| Pension, SERP and PBOP Income, Net | (6,679) | (6,614) |
|---|
| Regulatory Under Recoveries, Net | (8,466) | (198,781) |
|---|
| Amortization of Regulatory Assets, Net | 45,487 | 101,874 |
|---|
| Cost of Removal Expenditures | (21,249) | (29,473) |
|---|
| Other | (8,776) | 335 |
|---|
| Changes in Current Assets and Liabilities: |
|---|
| Receivables and Unbilled Revenues, Net | (12,479) | (36,877) |
|---|
| Taxes Receivable/Accrued, Net | (1,638) | 28,721 |
|---|
| Accounts Payable | (15,306) | (21,273) |
|---|
| Other Current Assets and Liabilities, Net | 31,001 | 12,912 |
|---|
| Net Cash Flows Provided by Operating Activities | 358,271 | 205,166 |
|---|
| Investing Activities: |
|---|
| Investments in Property, Plant and Equipment | (402,789) | (461,427) |
|---|
| Net Cash Flows Used in Investing Activities | (402,789) | (461,427) |
|---|
| Financing Activities: |
|---|
| Cash Dividends on Common Stock | (175,000) | (62,000) |
|---|
| Capital Contributions from Eversource Parent | 75,000 | 200,000 |
|---|
| Issuance of Long-Term Debt | 300,000 | 300,000 |
|---|
| Repayment of Rate Reduction Bonds | (43,210) | (43,210) |
|---|
| Decrease in Notes Payable to Eversource Parent | (123,000) | (143,700) |
|---|
| Other Financing Activities | (1,867) | (3,140) |
|---|
| Net Cash Flows Provided by Financing Activities | 31,923 | 247,950 |
|---|
| Net Decrease in Cash and Restricted Cash | (12,595) | (8,311) |
|---|
| Cash and Restricted Cash - Beginning of Period | 37,243 | 35,004 |
|---|
| Cash and Restricted Cash - End of Period | $24,648 | $26,693 |
|---|