Company: NOC
Filing Date: 2025-05-27
Form Type: 424B5
Source: 0001193125-25-126289
Chunk: 39

Company: NORTHROP GRUMMAN CORP /DE/
Filing Date: 2025-05-27
Form: 424B5
Chunk 39
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 read
this prospectus and any accompanying prospectus supplements carefully before you make your investment decision.

We may offer and sell the
securities on an immediate, continuous or delayed basis directly to investors or through underwriters, dealers or agents, or through a combination of these methods.

Northrop Grumman’s common stock is listed on The New York Stock Exchange under the symbol “NOC”.

Investing in these securities involves certain risks. See “ Risk Factors” included in any accompanying prospectus supplement and in the documents incorporated by reference in this prospectus for a discussion of the factors you should carefully consider before deciding to purchase these securities.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

The date of this prospectus is March 13, 2023.

TABLE OF CONTENTS

| ABOUT THIS PROSPECTUS                            |     |  1 |
| WHERE YOU CAN FIND MORE INFORMATION              |     |  1 |
| INCORPORATION BY REFERENCE                       |     |  1 |
| FORWARD-LOOKING STATEMENTS AND IMPORTANT FACTORS |     |  2 |
| RISK FACTORS                                     |     |  3 |
| NORTHROP GRUMMAN CORPORATION                     |     |  3 |
| USE OF PROCEEDS                                  |     |  3 |
| DESCRIPTION OF SENIOR DEBT SECURITIES            |     |  4 |
| DESCRIPTION OF COMMON STOCK                      |     | 10 |
| PLAN OF DISTRIBUTION                             |     | 11 |
| LEGAL MATTERS                                    |     | 14 |
| EXPERTS                                          |     | 14 |

ABOUT THIS PROSPECTUS

Unless otherwise stated or the context otherwise requires, references in this prospectus to “Northrop Grumman” are to Northrop
Grumman Corporation, and references to “we,” “our,” “us” or similar references are to Northrop Grumman and its consolidated subsidiaries.

This prospectus is part of a registration statement that we filed with the Securities and Exchange Commission, or the SEC, using a shelf
registration process. Under this shelf registration process, Northrop Grumman may from time to time sell, either separately or together, senior debt securities or common stock, in one or more offerings to the public. This prospectus provides you
with a general description of these securities.

Each time