Company: NOC
Filing Date: 2025-05-28
Form Type: 424B5
Source: 0001193125-25-129530
Chunk: 11

Company: NORTHROP GRUMMAN CORP /DE/
Filing Date: 2025-05-28
Form: 424B5
Chunk 11
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 on any securities exchange. As a result, we cannot provide any assurance that a market will develop for the notes or that you will be able to sell your notes. If the notes are traded after their initial issuance, they may trade at a discount from their initial offering price. Future trading prices of the notes will depend on many factors, including prevailing interest rates, the market for similar securities, general economic conditions and our financial condition, performance and prospects. The condition of the financial markets and prevailing interest rates have fluctuated in the past and are likely to fluctuate in the future, which could have an adverse effect on the market prices of the notes. Accordingly, you may be required to bear the financial risk of an investment in the notes for an indefinite period of time. Any trading market that might develop for any series of notes would be affected by many factors independent of and in addition to the foregoing, including:

| • |     | the time remaining to the maturity of the notes of such series; |

| • |     | the outstanding amount of the notes of such series; |

| • |     | the terms related to optional redemption of the notes of such series; and |

| • |     | the level, direction and volatility of market interest rates generally. |

Changes in our credit rating may adversely affect your investment in the notes. Actual or anticipated changes or downgrades in our credit ratings, including any announcement that our ratings are under further review for a downgrade, could increase our corporate borrowing costs and affect the market value of the notes. Also, our credit ratings may not reflect the potential impact of risks related to structure, market or other factors related to the value of the notes. Holders of the notes will have no recourse against us or any other parties in the event of a change in, or suspension or withdrawal of, any such rating. S-9

Use of proceeds

We expect the net proceeds of this offering to be approximately $994,495,000, after deducting underwriting discounts but before deducting our estimated
expenses of this offering. We intend to use the net proceeds of this offering for general corporate purposes, which may include debt repayment (including our 7.875% and 7.750% senior notes due 2026), share repurchases and working capital.

S-10

Description of notes

The following description of the notes offered by this prospectus supplement is intended to supplement and to the extent inconsistent to replace, the more general terms and provisions of the senior debt securities described in the accompanying prospect