Company: FCNCB
Filing Date: 2025-03-06
Form Type: 424B5
Source: 0001193125-25-047965
Chunk: 38

Company: FIRST CITIZENS BANCSHARES INC /DE/
Filing Date: 2025-03-06
Form: 424B5
Chunk 38
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From (and including) , 20 to (but excluding) the senior notes maturity date or the date of redemption (the “senior notes floating rate period”), the senior notes will bear interest at a rate equal to the Benchmark (as defined below) plus basis points per annum (the “Spread”). During the senior notes floating rate period, interest on the senior notes will be payable quarterly in arrears on , 20 , , 20 , , 20 and on the senior notes maturity date and any redemption date (each, a “senior notes floating rate interest payment date”). Senior Notes Fixed Rate Period:

| • |     | Interest will be computed on the basis of a 360-day year consisting of 
 twelve 30-day months.                                                  |

| • |     | If any scheduled senior notes fixed rate interest payment date (other than any redemption date) is not a Business                                                                                                                                    
 Day, any payment of principal and interest will be postponed to the next day that is a Business Day, but interest on that payment will not accrue during the period from and after the originally scheduled senior notes fixed rate interest payment 
 date.                                                                                                                                                                                                                                                |

Senior Notes Floating Rate Period:

| • |     | Interest will be computed for the period beginning on (and including) a senior notes floating rate interest                                                                                                                                
 payment date and ending on (but excluding) the next succeeding senior notes floating rate interest payment date or the senior notes maturity date or date of redemption (each, a “floating rate interest period”); provided that the first 
 floating rate interest period will begin on (and include)   , 20   and will end on (but exclude) the first senior notes floating rate interest payment date.                                                                               |

| • |     | The interest rate on the senior notes will be calculated quarterly on the second U.S. Government Securities                                            
 Business Day preceding the applicable senior notes floating rate interest payment date, except as described below (the “Interest Determination Date”). |

| • |     | In no event will the interest payable on the senior notes be less than zero. |

| • |     | Interest will be computed on the basis of the actual number of days in each floating rate interest period and a 360-day year. The amount of accrued interest payable on the senior notes for each floating rate interest period will be computed by multiplying (i) the outstanding principal amount of the senior notes by 
 (ii) the product of (a) the interest rate for the relevant floating rate interest period multiplied by