Company: FCNCB
Filing Date: 2025-11-14
Form Type: 424B5
Source: 0001193125-25-283229
Chunk: 2

Company: FIRST CITIZENS BANCSHARES INC /DE/
Filing Date: 2025-11-14
Form: 424B5
Chunk 2
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 D Preferred Stock is subject to our receipt of any required prior approval by the Board of Governors of the Federal Reserve System or other successor regulatory authority (the “Federal Reserve”) and to the satisfaction of any conditions set forth in the capital standards, guidelines or regulations of the Federal Reserve applicable to redemption of the Series D Preferred Stock. The Series D Preferred Stock will not have any voting rights, except as set forth under “Description of the Series D Preferred Stock—Voting Rights” on page S-20. The depositary shares are a new issue of securities with no established trading market. We do not intend to apply for listing of the depositary shares on any securities exchange or for inclusion of the depositary shares in any automated dealer quotation system. Investing in the depositary shares involves risks. See “ Risk Factors” beginning on page S-7of this prospectus supplement and in “Item 1A. Risk Factors” of our Annual Report on Form 10-Kfor the year ended December 31, 2024, as updated by our Quarterly Reports on Form 10-Q,each as filed with the U.S. Securities and Exchange Commission (the “SEC”) to read about factors you should consider before investing in the depositary shares.

|                      |     | Price to  
 Public(1) |             |     | Underwriting 
 Discount     |           |     | Proceeds, Before 
 Expenses, to     
 BancShares       |             |
|:---------------------|:----|:----------|------------:|:----|:-------------|----------:|:----|:-----------------|------------:|
| Per Depositary Share |     | $         |       1,000 |     | $            |        10 |     | $                |         990 |
| Total                |     | $         | 500,000,000 |     | $            | 5,000,000 |     | $                | 495,000,000 |

| (1) | The price to the public does not include dividends, if any, that may be declared. Dividends, if declared, will 
 accrue from the date of initial issuance, which is expected to be November 18, 2025.                           |

The depositary shares are not savings accounts, deposits, or other obligations of any of our bank or non-banksubsidiaries and are not insured or guaranteed by the Federal Deposit Insurance Corporation (the “FDIC”) or any other governmental agency or instrumentality. The depositary