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NSTAR Electric Company, doing business as Eversource Energy, issued an additional $300,000,000 aggregate principal amount of its 5.20% Debentures due 2035 under an underwriting agreement with a syndicate led by BofA Securities, J.P. Morgan, Morgan Stanley, PNC Capital Markets, RBC Capital Markets, and U.S. Bancorp Investments. Following closing, the total outstanding for this series rose to $700,000,000.
The debentures were issued under a 1988 indenture and are registered on Form S-3 (File No. 333-286362-03). They mature on March 1, 2035 and bear interest at 5.20%, payable semi-annually on March 1 and September 1, with the first payment for the additional issuance on March 1, 2026.
NSTAR Electric Company (Eversource Energy) is offering $300,000,000 of 5.20% Debentures due 2035 in a reopening that will be fungible with the $400,000,000 issued on February 26, 2025, bringing total outstanding for this series to $700,000,000. The debentures priced at 102.451% with a 0.650% underwriting discount, generating estimated net proceeds of $305,403,000 (plus accrued interest if settled on October 17, 2025).
The notes are unsecured, rank equally with other unsubordinated debt, and pay interest semi-annually on March 1 and September 1, starting March 1, 2026. They mature on March 1, 2035, and are redeemable at the greater of make‑whole (Treasury Rate + 15 bps) or 100% before the Par Call Date of December 1, 2034, and at 100% thereafter, in each case plus accrued interest.
Use of proceeds: approximately $305.4 million will be used to refinance short‑term debt and to fund capital expenditures and working capital. As of October 9, 2025, short‑term debt outstanding was $399.0 million with a 4.26% weighted‑average annual interest rate. The debentures will not be listed on an exchange; settlement is expected on October 17, 2025.
NSTAR Electric Company (doing business as Eversource Energy) plans a reopening of its 5.20% Debentures due 2035 via a preliminary prospectus supplement. The new notes will be part of the same series as the $400,000,000 issued on February 26, 2025, share the same CUSIP, and be fully fungible. The debentures mature on March 1, 2035, pay interest semi-annually on March 1 and September 1 (commencing March 1, 2026 for this tranche), and are unsecured, ranking equally with the company’s other unsecured and unsubordinated debt.
The notes are redeemable at the company’s option at a make-whole price prior to the Par Call Date and at 100% of principal on or after the Par Call Date of December 1, 2034. The offering is expected to qualify as a “qualified reopening” for U.S. federal income tax purposes. NSTAR Electric does not intend to list the debentures. The company expects to use net proceeds to refinance short-term debt and to fund capital expenditures and working capital. As of October 9, 2025, short-term debt was approximately $399.0 million with a 4.26% weighted-average annual interest rate.
