Company: POR
Filing Date: 2025-07-25
Form Type: S-3ASR
Source: 0001140361-25-027327
Chunk: 1

Company: PORTLAND GENERAL ELECTRIC CO /OR/
Filing Date: 2025-07-25
Form: S-3ASR
Chunk 1
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) under the Securities Act, check the following box. ☒ If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box.☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

| Large accelerated filer |     | ☒ |     | Accelerated filer         |     | ☐ |
| Non-accelerated filer   |     | ☐ |     | Smaller reporting company |     | ☐ |
|                         |     |   |     | 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 7(a)(2)(B) of the Securities Act.☐

#### TABLE OF CONTENTS

### PROSPECTUS

#### Portland General Electric Company

#### Common Stock

#### Debt Securities

#### Stock Purchase Contracts

#### Stock Purchase Units

#### and

#### First Mortgage Bonds
**Portland General Electric Company may offer and sell from time to time, in one or more offerings, shares of our common stock, debt securities, stock purchase contracts, stock purchase units and first mortgage bonds.

This prospectus describes some of the general terms that may apply to these securities. The specific terms of any securities to be offered will be described in a supplement to this prospectus. A prospectus supplement may also add, update or change information contained in this prospectus. You should read this prospectus and the applicable prospectus supplement carefully before you make your investment decision.

We may offer and sell these securities through one or more underwriters, dealers and agents, underwriting syndicates managed or co-managed by one or more underwriters, or directly to purchasers, on a continuous or delayed basis. The prospectus supplement for each offering of securities will describe in detail the plan of distribution for that offering. For general information about the distribution of securities offered, please see “Plan of Distribution” on