Company: NOC
Filing Date: 2025-05-28
Form Type: 424B5
Source: 0001193125-25-129530
Chunk: 61

Company: NORTHROP GRUMMAN CORP /DE/
Filing Date: 2025-05-28
Form: 424B5
Chunk 61
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 Company’s internal control over financial reporting have been audited by Deloitte &
Touche LLP, an independent registered public accounting firm, as stated in their reports. Such financial statements are incorporated by reference in reliance upon the reports of such firm given their authority as experts in accounting and auditing.

14

$500,000,000 4.650% Senior Notes due 2030 $500,000,000 5.250% Senior Notes due 2035 Prospectus supplement Joint Book-Running Managers

| Mizuho |     | Goldman Sachs & Co. LLC |     | Morgan Stanley |

| BofA Securities |     | J.P. Morgan |     | US Bancorp |     | Wells Fargo Securities |

Senior Co-Managers

| BNP PARIBAS |     | SMBC Nikko |     | TD Securities |

Co-Managers

| ANZ Securities UniCredit                  
 Capital Markets Drexel Hamilton Ramirez & 
 Co., Inc.                                 |     | BNY Mellon Capital Markets, LLC 
 Academy Securities              |     | Scotiabank                     
 CastleOak Securities, L.P.     
 Mischler Financial Group, Inc. 
 Siebert Williams Shank         |

May 27, 2025