Company: NOC
Filing Date: 2025-05-28
Form Type: 424B5
Source: 0001193125-25-129530
Chunk: 41

Company: NORTHROP GRUMMAN CORP /DE/
Filing Date: 2025-05-28
Form: 424B5
Chunk 41
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ERTS                                          |     | 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 we sell securities, we will provide a prospectus supplement containing specific
information about the terms of that offering. That prospectus supplement may include or incorporate by reference a discussion of any risk factors and may discuss special considerations applicable to those securities. The prospectus supplement may
also add, update or change information contained in this prospectus. You should read both this prospectus and any accompanying prospectus supplement together with additional information described under the heading “Where You Can Find More
Information” and “Incorporation by Reference.” If there is any inconsistency between the information in this prospectus and any prospectus supplement, you should rely on the information contained in that prospectus supplement.

You should rely on the information contained in or incorporated by reference in this prospectus, any accompanying prospectus supplement or in
any related free writing prospectus filed by us with the SEC. We have not authorized anyone to provide you with different information. If any third party provides you with different or inconsistent information, you should not rely on it. We are not
making an offer to sell these securities in any jurisdiction where the offer or sale is not permitted. You should read this prospectus, including the documents incorporated by reference in this prospectus, when making your investment decision. You
should assume that the information appearing in this prospectus, any prospectus supplement, the documents incorporated by reference and any related free writing prospectus is accurate only as of their respective dates. Our business, financial
condition, results of operations, cash flows and/or prospects may have changed materially since those dates.

WHERE YOU CAN FIND MORE INFORMATION

Northrop Grumman files annual, quarterly and current reports, proxy statements and other information with the SEC. The SEC maintains a site on