Midamerican Energy Co – Indentures Watch

from 10-K 11 pages Northern Powergrid (Yorkshire) PLC £1,000,000,000 Euro Medium Term Note Programme £300,000,000 5.875% Fixed Rate Notes Due 2055 Subscription Agreement Contents

from 10-K 12 pages Northern Powergrid (Northeast) PLC £1,000,000,000 Euro Medium Term Note Programme £250,000,000 5.375 Per Cent. Fixed Rate Notes Due 2037 Subscription Agreement

from 8-K 19 pages Midamerican Energy Company and the Bank of New York Mellon Trust Company, N.A., as Trustee Thirteenth Supplemental Indenture Dated as of November 5, 2025 Establishing and Creating 5.500% First Mortgage Bonds Due 2056

from 10-Q 26 pages Sierra Pacific Power Company D/B/a NV Energy and the Bank of New York Mellon Trust Company, N.A., as Trustee First Supplemental Indenture Dated as of September 8, 2025 to Indenture Dated as of September 8, 2025 6.200% Fixed-To-Fixed Reset Rate Junior Subordinated Notes, Sppc Jsn Series 2025a, Due 2055

from 10-Q 59 pages Sierra Pacific Power Company D/B/a NV Energy and the Bank of New York Mellon Trust Company, N.A., as Trustee Indenture Dated as of September 8, 2025 Subordinated Debt Securities Reconciliation and Tie Between the Trust Indenture Act of 1939 and Indenture, Dated as of September 8, 2025 *

from S-3ASR 81 pages Midamerican Energy Company and , as Trustee Indenture Dated as of , 20 Subordinated Debt Securities Reconciliation and Tie Between the Trust Indenture Act of 1939 and Indenture, Dated as of , 20 *

from 10-Q 10 pages Northern Powergrid (Yorkshire) PLC £1,000,000,000 Euro Medium Term Note Programme £250,000,000 6.125% Fixed Rate Notes Due 2050 Subscription Agreement

from 10-Q 160 pages Clifford Chance

from 10-Q 18 pages Altalink, L.P. Capital Markets Platform

from 10-K 75 pages Fiscal Agency Agreement Between Northern Natural Gas Company, as Issuer and the Bank of New York Mellon Trust Company, N.A., as Fiscal Agent Dated as of January 31, 2024 5.625% Senior Bonds Due 2054

from 10-K 81 pages Clifford Clifford Chance Llp Chance

from 8-K 19 pages Midamerican Energy Company and the Bank of New York Mellon Trust Company, N.A., as Trustee Twelfth Supplemental Indenture Dated as of January 24, 2024 Establishing and Creating 5.300% First Mortgage Bonds Due 2055

from 10-Q 18 pages Altalink, L.P. Capital Markets Platform

from 8-K 30 pages Midamerican Energy Company and the Bank of New York Mellon Trust Company, N.A., as Trustee Eleventh Supplemental Indenture Dated as of September 7, 2023 Establishing and Creating 5.350% First Mortgage Bonds Due 2034 5.850% First Mortgage Bonds Due 2054

from 10-K 20 pages Twenty-Fourth Supplemental Indenture Dated as of November 28, 2022 Altalink, L.P. Twenty-Fourth Supplemental Indenture

from 10-Q 80 pages This Trust Deed Is Made on 1 April 2022 Between: (1)northern Powergrid (Northeast) PLC (The "Issuer"), a Public Company Incorporated in England and Wales With Limited Liability Under Registered Number 02906593; and (2)hsbc Corporate Trustee Company (Uk) Limited (The "Trustee", Which Expression Shall, Where the Content So Admits, Include All Persons for the Time Being the Trustee or Trustees of This Trust Deed (As Defined Below) (Including Any Successors)). Whereas (A)the Issuer Has Authorised the Issue of £350,000,000 in Aggregate Principal Amount of 3.250 Per Cent. Bonds Due 2052 to Be Constituted by This Trust Deed. (B)the Trustee Has Agreed to Act as Trustee of This Trust Deed on the Following Terms and Conditions. Now This Deed Witnesses and It Is Hereby Declared as Follows

from 10-Q 38 pages Fifth Supplemental Indenture

from 10-Q 38 pages Fourth Supplemental Indenture

from 10-Q 38 pages Third Supplemental Indenture

from 10-Q 38 pages Second Supplemental Indenture