Company: FCNCB
Filing Date: 2025-03-07
Form Type: 424B5
Source: 0001193125-25-049895
Chunk: 117

Company: FIRST CITIZENS BANCSHARES INC /DE/
Filing Date: 2025-03-07
Form: 424B5
Chunk 117
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 from us without charge. You can obtain documents incorporated by reference in this prospectus by requesting them in writing or by telephone from us at the following address: First Citizens BancShares, Inc. 4300 Six Forks Road Raleigh, North Carolina 27609 (919) 716-7000 Attn: Corporate Secretary 10

$500,000,000 5.231% Fixed-to-FloatingRate Senior Notes due 2031 $750,000,000 6.254% Fixed-to-FixedRate Subordinated Notes due 2040 Prospectus Supplement Joint Book-Running Managers

| Citigroup |     | J.P. Morgan |

Co-Managers

| Piper Sandler |     | US Bancorp |

March 6, 2025