Company: NOC
Filing Date: 2025-05-27
Form Type: 424B5
Source: 0001193125-25-126289
Chunk: 4

Company: NORTHROP GRUMMAN CORP /DE/
Filing Date: 2025-05-27
Form: 424B5
Chunk 4
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 business conditions that could impact business investments and/or recorded goodwill or the value of 
 other long-lived assets, and other potential future liabilities                                                |

You are urged to consider the limitations on, and risks associated with, forward-looking statements and not unduly rely on the accuracy of forward-looking statements. These forward-looking statements speak only as of the date of this prospectus supplement or, in the case of any document incorporated by reference, the date of that document. We undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by applicable law. S-4

Summary

The following summary is provided solely for your convenience. It is not intended to be complete. You should read carefully this entire prospectus supplement, the accompanying prospectus and all the information included or incorporated by reference herein or therein, especially the risks discussed in the section titled “Risk factors” beginning on page S-8of this prospectus supplement and in the documents incorporated by reference herein.

Northrop Grumman Corporation

Northrop Grumman Corporation is a leading global aerospace and defense technology company. We deliver a broad range of products, services
and solutions to U.S. and international customers, and principally to the DoD and intelligence community. Our broad portfolio is aligned to support national security priorities and our solutions equip our customers with capabilities they need to
connect, protect and advance humanity.

We are a leading provider of space systems, military aircraft, missile defense, advanced weapons and long-range
fires capabilities, mission systems, networking and communications, strategic deterrence systems, and breakthrough technologies, such as advanced computing, microelectronics and cyber. We are focused on competing and winning programs that enable
continued growth, performing on our commitments and affordably delivering capability our customers need. With the investments we have made in advanced technologies, combined with our talented workforce and digital transformation capabilities, we are
well positioned to meet our customers’ needs today and in the future.

The principal executive offices of Northrop Grumman are located at 2980
Fairview Park Drive, Falls Church, Virginia 22042, and our telephone number is (703) 280-2900.

We maintain a
website at http://www.northropgrumman.com. The information contained at our website is not incorporated by reference in this prospectus supplement or the accompanying prospectus, and you should not consider it a part of this prospectus supplement or
the accompanying prospectus.

The information above concerning North