SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION	3 Months Ended
Mar. 31, 2026
Accounting Policies [Abstract]
SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION	NOTE 1 — SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION Nature of Operations First Citizens BancShares, Inc. (the “Parent Company” and, when including all of its subsidiaries on a consolidated basis, “we,” “us,” “our,” “BancShares”) is a financial holding company organized under the laws of Delaware that conducts operations through its banking subsidiary, First-Citizens Bank & Trust Company (“FCB”), which is headquartered in Raleigh, North Carolina. BancShares operates a network of branches and offices, predominantly located in the Southeast, Mid-Atlantic, Midwest and Western United States. BancShares provides various types of commercial and consumer banking services, including lending, leasing, and wealth management services. Deposit services include checking, savings, money market, and time deposit accounts. BASIS OF PRESENTATION Principles of Consolidation and Basis of Presentation These consolidated financial statements and notes thereto are presented in accordance with instructions for Form 10-Q and Article 10 of Regulation S-X and, therefore, do not include all information and notes necessary for a complete presentation of financial position, results of operations and cash flow activity required in accordance with accounting principles generally accepted in the United States of America (“GAAP”). In the opinion of management, all normal recurring adjustments necessary for a fair presentation of the consolidated financial position and consolidated results of operations have been made. The unaudited interim consolidated financial statements included in this Quarterly Report on Form 10-Q (this “Form 10-Q”) should be read in conjunction with the Consolidated Financial Statements and Notes to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2025 (the “2025 Form 10-K”). Interim results are not necessarily indicative of results for a full year. The consolidated financial statements of BancShares include the accounts of BancShares and its subsidiaries, certain partnership interests, and variable interest entities (“VIEs”) where BancShares is the primary beneficiary, if applicable. All significant intercompany accounts and transactions are eliminated upon consolidation. Assets held in agency or fiduciary capacity are not included in the consolidated financial statements. Refer to Note 9—Variable Interest Entities for additional information regarding VIEs. Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions based on available information. These estimates and assumptions impact the amounts reported in the consolidated financial statements and accompanying notes and the disclosures provided, and actual results could differ from those estimates. The significant estimate related to the determination of the allowance for loan and lease losses (“ALLL”) is considered a critical accounting estimate. SIGNIFICANT ACCOUNTING POLICIES Significant accounting policies are described in the 2025 Form 10-K. There were no material changes to these policies during the three months ended March 31, 2026. Newly Adopted Accounting Standards As of January 1, 2026, BancShares adopted the following Accounting Standards Updates (“ASUs”) issued by the Financial Accounting Standards Board: ASU 2025-08—Financial Instruments — Credit Losses (Topic 326): Purchased Loans, Issued November 2025 Under this ASU, purchased seasoned loans (“PSLs” as described below) must be recognized at the purchase price, plus the ALLL at the acquisition date (the “Gross-Up Approach”). Since the ALLL at the acquisition date is established through the Gross-Up Approach, there is no corresponding increase to the provision for loan and lease losses (“Day 2 Provision for Loan and Lease Losses”). Prior to this ASU, the Gross-Up Approach was only permitted for purchased credit deteriorated (“PCD”) loans, while the initial ALLL for Non-PCD loans was established through the Day 2 Provision for Loan and Lease Losses. Under this ASU, the Gross-Up Approach applies to PCD loans and the following Non-PCD loans which qualify as PSLs: (i) non-credit card loans acquired in a business combination and (ii) non-credit card loans purchased more than 90 days after origination in a non-business combination transaction, provided the acquirer was not involved in the original lending. This ASU specifically excludes credit card loans from the definition of PSLs. This ASU is required to be applied prospectively upon adoption. We early adopted this ASU as of January 1, 2026 (the “Adoption Date”) on a prospective basis. For PSLs acquired on or after the Adoption Date, this ASU could reduce the Day 2 Provision for Loan and Lease Losses, and the subsequent credit-related loan purchase accounting accretion or amortization that was prevalent for Non-PCD loans acquired prior the Adoption Date. This ASU did not have a material impact on our consolidated financial statements or related disclosures for the three month period ended March 31, 2026. ASU 2025-05—Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets, Issued July 2025 This ASU provides an optional practical expedient which permits an entity to assume that current conditions as of the balance sheet date do not change for the remaining life of the asset when estimating the ALLL for accounts receivable. We adopted this ASU as of January 1, 2026. We did not elect the optional practical expedient and adoption of this ASU did not impact our consolidated financial statements or disclosures.

First Citizens BancShares, Inc. (the “Parent Company” and, when including all of its subsidiaries on a consolidated basis, “we,” “us,” “our,” “BancShares”) is a financial holding company organized under the laws of Delaware that conducts operations through its banking subsidiary, First-Citizens Bank & Trust Company (“FCB”), which is headquartered in Raleigh, North Carolina. BancShares operates a network of branches and offices, predominantly located in the Southeast, Mid-Atlantic, Midwest and Western United States. BancShares provides various types of commercial and consumer banking services, including lending, leasing, and wealth management services. Deposit services include checking, savings, money market, and time deposit accounts.

These consolidated financial statements and notes thereto are presented in accordance with instructions for Form 10-Q and Article 10 of Regulation S-X and, therefore, do not include all information and notes necessary for a complete presentation of financial position, results of operations and cash flow activity required in accordance with accounting principles generally accepted in the United States of America (“GAAP”). In the opinion of management, all normal recurring adjustments necessary for a fair presentation of the consolidated financial position and consolidated results of operations have been made. The unaudited interim consolidated financial statements included in this Quarterly Report on Form 10-Q (this “Form 10-Q”) should be read in conjunction with the Consolidated Financial Statements and Notes to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2025 (the “2025 Form 10-K”). Interim results are not necessarily indicative of results for a full year.

The consolidated financial statements of BancShares include the accounts of BancShares and its subsidiaries, certain partnership interests, and variable interest entities (“VIEs”) where BancShares is the primary beneficiary, if applicable. All significant intercompany accounts and transactions are eliminated upon consolidation. Assets held in agency or fiduciary capacity are not included in the consolidated financial statements.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions based on available information. These estimates and assumptions impact the amounts reported in the consolidated financial statements and accompanying notes and the disclosures provided, and actual results could differ from those estimates. The significant estimate related to the determination of the allowance for loan and lease losses (“ALLL”) is considered a critical accounting estimate.

Under this ASU, purchased seasoned loans (“PSLs” as described below) must be recognized at the purchase price, plus the ALLL at the acquisition date (the “Gross-Up Approach”). Since the ALLL at the acquisition date is established through the Gross-Up Approach, there is no corresponding increase to the provision for loan and lease losses (“Day 2 Provision for Loan and Lease Losses”).

Prior to this ASU, the Gross-Up Approach was only permitted for purchased credit deteriorated (“PCD”) loans, while the initial ALLL for Non-PCD loans was established through the Day 2 Provision for Loan and Lease Losses. Under this ASU, the Gross-Up Approach applies to PCD loans and the following Non-PCD loans which qualify as PSLs: (i) non-credit card loans acquired in a business combination and (ii) non-credit card loans purchased more than 90 days after origination in a non-business combination transaction, provided the acquirer was not involved in the original lending. This ASU specifically excludes credit card loans from the definition of PSLs. This ASU is required to be applied prospectively upon adoption.

We early adopted this ASU as of January 1, 2026 (the “Adoption Date”) on a prospective basis. For PSLs acquired on or after the Adoption Date, this ASU could reduce the Day 2 Provision for Loan and Lease Losses, and the subsequent credit-related loan purchase accounting accretion or amortization that was prevalent for Non-PCD loans acquired prior the Adoption Date. This ASU did not have a material impact on our consolidated financial statements or related disclosures for the three month period ended March 31, 2026.

This ASU provides an optional practical expedient which permits an entity to assume that current conditions as of the balance sheet date do not change for the remaining life of the asset when estimating the ALLL for accounts receivable.