# EDGAR Filing Document

**Accession Number:** 0000928576
**File Stem:** 0001193125-25-262760
**Filing Date:** 2025-11
**Character Count:** 5772
**Document Hash:** bee18deff4791230ccac3ebacdbf3cb5
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-262760.hdr.sgml**: 20251103

**ACCESSION NUMBER**: 0001193125-25-262760

**CONFORMED SUBMISSION TYPE**: FWP

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251103

**DATE AS OF CHANGE**: 20251103

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MIDAMERICAN ENERGY CO
- **CENTRAL INDEX KEY:** 0000928576
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRIC SERVICES [4911]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 421425214
- **STATE OF INCORPORATION:** IA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** FWP
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 333-291012
- **FILM NUMBER:** 251445112

**BUSINESS ADDRESS:**
- **STREET 1:** 1615 LOCUST STREET
- **CITY:** DES MOINES
- **STATE:** IA
- **ZIP:** 50309-3037
- **BUSINESS PHONE:** 515-242-4300

**MAIL ADDRESS:**
- **STREET 1:** PO BOX 657
- **CITY:** DES MOINES
- **STATE:** IA
- **ZIP:** 50306-0657
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MIDAMERICAN ENERGY CO
- **CENTRAL INDEX KEY:** 0000928576
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRIC SERVICES [4911]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 421425214
- **STATE OF INCORPORATION:** IA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** FWP

**BUSINESS ADDRESS:**
- **STREET 1:** 1615 LOCUST STREET
- **CITY:** DES MOINES
- **STATE:** IA
- **ZIP:** 50309-3037
- **BUSINESS PHONE:** 515-242-4300

**MAIL ADDRESS:**
- **STREET 1:** PO BOX 657
- **CITY:** DES MOINES
- **STATE:** IA
- **ZIP:** 50306-0657

**Issuer Free Writing Prospectus** 

**(Relating to Preliminary Prospectus Supplement** 

**Dated November 3, 2025)** 

**Filed Pursuant to Rule 433(d)** 

**Registration No. 333-291012** 

**MIDAMERICAN ENERGY COMPANY** 

**FINAL PRICING TERM SHEET** 

**November 3, 2025** 

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| | |
|:---|:---|
| Issuer: | MidAmerican Energy Company |
| Legal Format: | SEC-Registered |
| Issue: | 5.500% First Mortgage Bonds due 2056 |
| Offering Size: | $400,000,000 in aggregate principal amount |
| Net Proceeds (before expenses) to Issuer: | $393728000 |
| Coupon and Coupon Payment Dates: | 5.500% per annum, payable semi-annually on each May 15 and November 15, commencing May 15, 2026 |
| Trade Date: | November 3, 2025 |
| Settlement Date: | November 5, 2025 (T+2) |
| Maturity Date: | November 15, 2056 |
| Benchmark Treasury: | UST 4.750% due May 15, 2055 |
| Benchmark Treasury Yield: | 4.702% |
| Spread to Benchmark Treasury: | +85 basis points |
| Re-offer Yield: | 5.552% |
| Price to Public: | 99.232% of the principal amount |
| Expected Ratings<sup>1</sup>: | Aa2 (Stable) by Moody's Investors Service, Inc.<br> A (Stable) by S&P Global Ratings |

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<sup>1</sup> These expected securities ratings have been provided by Moody's Investors Service, Inc. and S&P Global Ratings. None of these ratings are a recommendation to buy, sell or hold these securities. Each rating may be subject to revision or withdrawal at any time, and should be evaluated independently of any other rating. No report of any rating agency is incorporated by reference herein. 

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| | |
|:---|:---|
| Optional Redemption: | Prior to May 15, 2056 (the date that is six months prior to their maturity date) (the "**Par Call Date**"), the First Mortgage Bonds will be redeemable, in whole or in part from time to time, at a redemption price (expressed as a percentage of principal amount and rounded to three decimal places) equal to the greater of (i) 100% of the principal amount of the First Mortgage Bonds being redeemed and (ii) (a) the sum of the present values of the remaining scheduled payments of principal and interest on the First Mortgage Bonds being redeemed discounted to the redemption date (assuming the First Mortgage Bonds matured on the Par Call Date) on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate plus 15 basis points, less (b) interest accrued to the date of redemption; plus, in either case, accrued and unpaid interest thereon to the redemption date. On or after the Par Call Date, the First Mortgage Bonds will be redeemable, in whole or in part, at any time and from time to time, at a redemption price equal to 100% of the principal amount of the First Mortgage Bonds being redeemed, plus accrued and unpaid interest thereon to the redemption date. |
| CUSIP / ISIN: | 595620 BA2 / US595620BA22 |
| Joint Book-Running Managers: | BMO Capital Markets Corp.<br> CIBC World Markets Corp.<br> SMBC Nikko Securities America, Inc.<br> Truist Securities, Inc.<br> U.S. Bancorp Investments, Inc.<br> KeyBanc Capital Markets Inc.<br> nabSecurities, LLC<br> Regions Securities LLC<br> Scotia Capital (USA) Inc.<br> TD Securities (USA) LLC |
| Co-Managers: | Huntington Securities, Inc.<br> Loop Capital Markets LLC |

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**The issuer has filed a registration statement (including a prospectus) with the SEC for the offering to which this communication relates. Before you invest, you should read the prospectus in that registration statement and other documents the issuer has filed with the SEC for more complete information about the issuer and this offering. You may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, the issuer, any underwriter or any dealer participating in the offering will arrange to send you the prospectus if you request it by calling BMO Capital Markets Corp. toll-free at 1 (888) 200-0266; CIBC World Markets Corp. toll-free at 1 (800) 282-0822; SMBC Nikko Securities America, Inc. toll-free at 1 (888) 868-6856; Truist Securities, Inc. toll-free at 1 (800) 685-4786; or U.S. Bancorp Investments, Inc. toll-free at 1 (877) 558-2607.**