Company: NOC
Filing Date: 2025-05-27
Form Type: 424B5
Source: 0001193125-25-126289
Chunk: 56

Company: NORTHROP GRUMMAN CORP /DE/
Filing Date: 2025-05-27
Form: 424B5
Chunk 56
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 forth the terms of such offering, including:

| • |     | the name or names of any underwriters, dealers or agents; |

| • |     | the purchase price of the offered securities and the proceeds we will receive from the sale; |

| • |     | any underwriting discounts and commissions or agency fees and other items constituting underwriters’ or 
 agents’ compensation; and                                                                               |

| • |     | any initial public offering price, any discounts or concessions allowed or reallowed or paid to dealers and any 
 securities exchanges on which such offered securities may be listed.                                            |

Any initial public offering prices, discounts or concessions allowed or reallowed or paid to dealers may be changed from time to time. If underwriters are used in the sale, the underwriters will acquire the offered securities for their own account and may resell them from time to time in one or more transactions, including negotiated transactions, at a fixed public offering price or at varying prices determined at the time of sale. The offered securities may be offered either to the public through underwriting syndicates represented by one or more managing underwriters or by one or more underwriters without a syndicate. Unless otherwise set forth in a prospectus supplement, the obligations of the underwriters to purchase any series of securities will be subject to certain conditions precedent, and the underwriters will be obligated to purchase all of such series of securities, if any are purchased. In connection with underwritten offerings of the offered securities and in accordance with applicable law and industry practice, underwriters may over-allot or effect transactions that stabilize, maintain or otherwise affect the market price of the offered securities at levels above those that might otherwise prevail in the open market, including by entering stabilizing bids, effecting syndicate covering transactions or imposing penalty bids, each of which is described below.

| • |     | A stabilizing bid means the placing of any bid, or the effecting of any purchase, for the purpose of pegging, 
 fixing or maintaining the price of a security.                                                                |

| • |     | A syndicate covering transaction means the placing of any bid on behalf of the underwriting syndicate or the 
 effecting of any purchase to reduce a short position created in connection with the offering.                |

| • |     | A penalty bid means an arrangement that permits the managing underwriter to reclaim a selling concession from a                                                    
 syndicate member in connection with the offering when offered securities originally sold by the syndicate member are purchased in syndicate covering transactions. |