Company: NOC
Filing Date: 2025-05-28
Form Type: 424B5
Source: 0001193125-25-129530
Chunk: 42

Company: NORTHROP GRUMMAN CORP /DE/
Filing Date: 2025-05-28
Form: 424B5
Chunk 42
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the internet at http://www.sec.gov that contains reports, proxy statements and other information that we file electronically with the SEC. Copies of certain information filed by us with the SEC are also available on our website at
www.northropgrumman.com. Our website is not a part of, and is not incorporated by reference into, this prospectus.

This prospectus is
part of a registration statement we filed with the SEC. This prospectus omits some information contained in the registration statement in accordance with SEC rules and regulations. You should review the information in, and the exhibits to, the
registration statement for further information on us and our consolidated subsidiaries and the securities we are offering. Statements in this prospectus concerning any document we filed as an exhibit to the registration statement or that we
otherwise filed with the SEC are not intended to be comprehensive and are qualified by reference to these filings. You should review the complete document to evaluate these statements.

INCORPORATION BY REFERENCE

We are “incorporating by reference” information into this prospectus, which means that we can disclose important information to you
by referring you to another document that has been filed separately with the SEC.

1

The information incorporated by reference is considered to be part of this prospectus, and information that we file later with the SEC will automatically update and supersede the information contained in documents filed earlier with the SEC or contained in this prospectus. This means that you must look at all of the SEC filings that we incorporate by reference to determine if any of the statements in this prospectus or in any document previously incorporated by reference have been modified or superseded. We incorporate by reference in this prospectus the documents listed below (File No. 001-16411)and any future filings made by us with the SEC under Section 13(a), 13(c), 14 and 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), after the initial filing of the registration statement that contains this prospectus and prior to the time that the offering of the securities under the registration statement is terminated or completed (in each case, other than those documents or the portions of those documents not deemed to be filed):

You may obtain copies, without charge, of documents incorporated by reference in this prospectus, by requesting them in writing or by telephone from us as follows: Jennifer C. McGarey Corporate Vice President and Secretary 2980 Fairview Park Drive Falls Church, Virginia 22042 (703)