Organization and Basis of Presentation	6 Months Ended
Jun. 30, 2026
Accounting Policies [Abstract]
Organization and Basis of Presentation	Organization and Basis of Presentation Nature of Operations - The consolidated financial statements include the accounts of FirstSun Capital Bancorp (“FirstSun” or “Parent Company”) and its wholly-owned subsidiaries, Sunflower Bank, N.A. (the “Bank”), First Foundation Advisors (which also operates as FirstSun Advisors and Sunflower Wealth Advisors), and FEIF Capital Partners, LLC, and have been prepared using U.S. generally accepted accounting principles (“GAAP”) and prevailing practices in the banking industry. All significant intercompany balances and transactions have been eliminated. These entities are collectively referred to as “our”, “us”, “we”, or “the Company”. Basis of Presentation - The consolidated financial statements in this Quarterly Report on Form 10-Q have been prepared in accordance with GAAP for interim financial information, but do not include all of the information and footnotes required by GAAP for a full year presentation and certain disclosures have been condensed or omitted in accordance with rules and regulations of the SEC. These interim financial statements are unaudited, and include, in our opinion, all adjustments necessary for a fair statement of the results for the periods indicated, which are not necessarily indicative of results which may be expected for the full year. These unaudited consolidated financial statements and notes should be read in conjunction with FirstSun’s audited consolidated financial statements and footnotes thereto for the year ended December 31, 2025, included in our 2025 Annual Report. See Note 1 - Basis of Presentation, Description of Business and Summary of Significant Accounting Policies in the Notes to the Consolidated Financial Statements contained in Item 8, Financial Statements and Supplementary Data, in the Company’s 2025 Form 10-K and this Note 1 for additional information on the Company’s significant accounting policies. There have not been any significant changes to the Company’s accounting policies from those disclosed in the Company’s 2025 Form 10-K that could have a material effect on the Company’s financial statements, except as discussed below. The accounting policy on Loans Receivable, specifically with respect to acquired loans, is updated below to include additional guidance following the Company’s early adoption of ASU 2025‑08, “Financial Instruments - Credit Losses (Topic 326): Purchased Loans” in connection with its acquisition of First Foundation Inc. Business Combination - On April 1, 2026, FirstSun completed its previously announced acquisition of First Foundation Inc. (“First Foundation”), pursuant to the Agreement and Plan of Merger dated October 27, 2025, by and between FirstSun and First Foundation, as amended (the “Merger Agreement”). At the effective time of the merger (the “Effective Time”), First Foundation merged with and into FirstSun, with FirstSun surviving the merger. Immediately following the merger, First Foundation Bank, a California-chartered banking corporation and wholly owned subsidiary of First Foundation, merged with and into the Bank, with the Bank continuing as the surviving bank. Further information is presented in Note 2 - Acquisition of First Foundation Inc. Use of Estimates - The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions based on available information. These estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. These estimates are based on historical experience and on various assumptions about the future that are believed to be reasonable based on all available information. Our reported financial position or results of operations may be materially different under changed conditions or when using different estimates and assumptions, particularly with respect to critical accounting policies. In the event that estimates or assumptions prove to differ from actual results, adjustments are made in subsequent periods to reflect more current information. Reclassifications - Some items in the prior year financial statements were reclassified to conform to the current presentation. Previously, deposit amounts related to certain NOW accounts with limited monthly transaction activity were able to be reclassified to money market accounts to reduce reserve requirements at the Federal Reserve. As there is no longer any impact to reserve requirements across different deposit products, we have discontinued this product reclassification practice and have revised the presentation of those deposits to conform to the current presentation for periods prior to March 31, 2026. Reclassifications had no effect on prior years net income or stockholders’ equity. Accounting Pronouncements Recently Adopted - As an “emerging growth company” under Section 107 of the JOBS Act, we can take advantage of the extended transition period provided in Section 7(a)(2)(B) of the Securities Act for complying with new or revised accounting standards. Therefore, we can delay the adoption of certain accounting standards until those standards would otherwise apply to non-public business entities. We intend to take advantage of the benefits of this extended transition period for an “emerging growth company” for as long as it is available to us. For standards that we have delayed adoption, we may lack comparability to other companies who have adopted such standards. ASU No. 2025-05, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets.” ASU 2025-05 provides all entities, when developing reasonable and supportable forecasts as part of estimating expected credit losses on current accounts receivable and/or current contract assets arising from transactions under ASC Topic 606 - Revenue from Contracts with Customers, a practical expedient whereby entities can assume that current conditions as of the balance sheet date do not change for the remaining life of the asset. ASU 2025-05 became effective for us in 2026 and did not have a significant impact on our financial statements. ASU 2025‑08, “Financial Instruments - Credit Losses (Topic 326): Purchased Loans.” The amendments in ASU 2025-08 amend the guidance in ASC 326 to expand and clarify the accounting for acquired loans, including “purchased seasoned loans,” with the objective of addressing concerns about complexity and potential double counting of expected credit losses in acquisition accounting. ASU 2025-08 requires entities to apply the amendments prospectively to loans acquired on or after the initial application date and does not require retrospective restatement of prior periods. The amendments in this update are effective for annual reporting periods beginning after December 15, 2026, including interim periods within those annual periods, and early adoption is permitted in an interim or annual reporting period in which financial statements have not yet been issued or made available for issuance. The Company early adopted the provisions of ASU 2025-08 in connection with its acquisition of First Foundation, which was completed on April 1, 2026. The Company applied the guidance prospectively to loans acquired in the transaction and will apply the updated guidance to any subsequent acquisitions occurring on or after initial adoption. Early adoption of the ASU 2025-08 affected the timing and measurement of expected credit losses for acquired performing loans. The impact from adoption is included in the accompanying footnotes. Updates to our Significant Accounting Policies a. Loans Receivable Acquired Loans – Loans acquired through a purchase or a business combination are recorded at their fair value as of the acquisition date. Purchased Credit Deteriorated (“PCD”) Loans. Management performs an assessment of acquired loans to first determine if such loans have experienced a more than insignificant deterioration in credit quality since their origination and thus should be classified and accounted for as PCD loans using a gross-up method where the sum of the loan’s purchase price and allowance for credit losses (“ACL”) becomes its initial amortized cost basis. At acquisition, the ACL for PCD loans is measured in accordance with the Company’s credit loss methodology and is added to the purchase price to establish the initial amortized cost basis under the gross-up approach. Any difference between the amortized cost basis and the unpaid principal balance of the loans is considered to be a non-credit discount or premium. This non-credit discount or premium is accreted or amortized into interest income using the interest method. Subsequent to acquisition, the ACL for PCD loans is determined pursuant to the Bank ACL methodology in the same manner as all other loans. Characteristics of PCD loans include the following: delinquency, payment history since origination, credit scores migration and/or other factors the Bank may become aware of through its initial analysis of acquired loans that may indicate there has been a more than insignificant deterioration in credit quality since a loan’s origination. Purchased Seasoned Loans. Loans acquired that have not experienced a more than insignificant deterioration in credit quality since origination are deemed purchased seasoned loans (“PSLs”) and are accounted for using the gross-up approach at acquisition described above for PCD loans. All non-PCD loans that are acquired in a business combination are deemed PSLs. Other non-PCD loans are PSLs if they were purchased at least 90 days after origination and the acquirer was not involved in the origination of the loans. At acquisition, the ACL for PSLs is measured in accordance with the Company’s credit-loss methodology and is added to the purchase price to establish the initial amortized cost basis under the gross-up approach. Any difference between the amortized cost basis and the unpaid principal balance of the loans is considered to be a non-credit discount or premium. This non-credit discount or premium is accreted or amortized into interest income using the interest method. Subsequent to acquisition, the ACL for PSLs is determined pursuant to the Bank’s ACL methodology in the same manner as all other loans. Non-Purchased Credit Deteriorated (non-PCD) Loans. Before the Company’s adoption of ASU 2025-08, Financial Instruments - Credit Losses (Topic 326): Purchased Loans in connection with the First Foundation acquisition on April 1, 2026, acquired loans that are not deemed to have experienced a more-than-insignificant credit deterioration since origination are considered non-PCD. Non-PCD loans are recorded at fair value, with any resulting discount or premium accreted or amortized into interest income over the remaining life of the loan using the interest method. Additionally, upon the purchase or acquisition of non-PCD loans, management measures and records an allowance for credit losses based on the Bank’s methodology for determining the ACL. The ACL for non-PCD loans is recorded through a charge to the provision for credit losses in the period in which the loans are purchased or acquired. Subsequent to acquisition, the allowance for credit losses for non-PCD loans is determined pursuant to the Bank’s ACL methodology in the same manner as all other loans. Recent Accounting Pronouncements Not Yet Adopted - ASU No. 2024-03, “Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses.” ASU 2024-03 requires disaggregated disclosure of income statement expenses for public business entities. ASU 2024-03 requires new financial statement disclosures in tabular format, disaggregating information about prescribed categories underlying any relevant income statement expense caption. The prescribed categories include, among other things, employee compensation, depreciation, and intangible asset amortization. Additionally, entities must disclose the total amount of selling expenses and, in annual reporting periods, an entity’s definition of selling expenses. ASU 2024-03 will be effective for us, on a prospective basis, for annual periods beginning in 2027, and interim periods within fiscal years beginning in 2028, though early adoption and retrospective application is permitted. ASU 2024-03 is not expected to have a significant impact on our financial statements. ASU No. 2025-06, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software.” ASU 2025-06 simplifies and modernizes the accounting for internal-use software by removing prescriptive project stage guidance and introducing a new capitalization threshold. Under the revised standard, software development costs are capitalized when management authorizes and commits funding for the project and it is probable the software will be completed and used as intended. ASU 2025-06 will be effective in 2028 and is not expected to have a significant impact on our financial statements. ASU 2025‑09, “Derivatives and Hedging (Topic 815): Hedge Accounting Improvements.” ASU 2025-09 amends ASC 815 to align hedge accounting more closely with an entity’s economic risk management practices. Key amendments include (i) to allow designating a variable price component of a nonfinancial forecasted purchase or sale as the hedged risk, (ii) to allow grouping individual forecasted transactions with similar (not identical) risk exposures, (iii) a new model for hedging forecasted interest on variable-rate debt, enabling changes in index or tenor without dedesignation, subject to simplifying assumptions, and (iv) additional clarifications related to hedge accounting of nonfinancial components, net written options, and dual-hedge strategies. ASU 2025-09 will be effective for us beginning in 2027, though early adoption is permitted. ASU 2025-09 is not expected to have a significant impact on our financial statements. ASU 2025‑11, “Interim Reporting (Topic 270): Narrow‑Scope Improvements.” ASU 2025-11 clarifies and enhances guidance under ASC 270 on interim financial reporting by (i) clarifying the scope of ASC 270 such that it now explicitly applies only to entities that issue complete interim financial statements and related notes under U.S. GAAP, (ii) establishing clear guidance on the form of interim statements and notes, incorporating a comprehensive list of required interim disclosures drawn from across the ASC, and (iii) introducing a requirement to disclose material events and changes occurring after the end of the last annual period that could impact interim results. ASU 2025-11 will be effective for us for interim periods beginning in 2028, though early adoption is permitted. ASU 2025-11 is not expected to have a significant impact on our financial statements.

Nature of Operations - The consolidated financial statements include the accounts of FirstSun Capital Bancorp (“FirstSun” or “Parent Company”) and its wholly-owned subsidiaries, Sunflower Bank, N.A. (the “Bank”), First Foundation Advisors (which also operates as FirstSun Advisors and Sunflower Wealth Advisors), and FEIF Capital Partners, LLC, and have been prepared using U.S. generally accepted accounting principles (“GAAP”) and prevailing practices in the banking industry. All significant intercompany balances and transactions have been eliminated. These entities are collectively referred to as “our”, “us”, “we”, or “the Company”.

Basis of Presentation - The consolidated financial statements in this Quarterly Report on Form 10-Q have been prepared in accordance with GAAP for interim financial information, but do not include all of the information and footnotes required by GAAP for a full year presentation and certain disclosures have been condensed or omitted in accordance with rules and regulations of the SEC. These interim financial statements are unaudited, and include, in our opinion, all adjustments necessary for a fair statement of the results for the periods indicated, which are not necessarily indicative of results which may be expected for the full year. These unaudited consolidated financial statements and notes should be read in conjunction with FirstSun’s audited consolidated financial statements and footnotes thereto for the year ended December 31, 2025, included in our 2025 Annual Report. See Note 1 - Basis of Presentation, Description of Business and Summary of Significant Accounting Policies in the Notes to the Consolidated Financial Statements contained in Item 8, Financial Statements and Supplementary Data, in the Company’s 2025 Form 10-K and this Note 1 for additional information on the Company’s significant accounting policies. There have not been any significant changes to the Company’s accounting policies from those disclosed in the Company’s 2025 Form 10-K that could have a material effect on the Company’s financial statements, except as discussed below. The accounting policy on Loans Receivable, specifically with respect to acquired loans, is updated below to include additional guidance following the Company’s early adoption of ASU 2025‑08, “Financial Instruments - Credit Losses (Topic 326): Purchased Loans” in connection with its acquisition of First Foundation Inc.

Business Combination - On April 1, 2026, FirstSun completed its previously announced acquisition of First Foundation Inc. (“First Foundation”), pursuant to the Agreement and Plan of Merger dated October 27, 2025, by and between FirstSun and First Foundation, as amended (the “Merger Agreement”). At the effective time of the merger (the “Effective Time”), First Foundation merged with and into FirstSun, with FirstSun surviving the merger. Immediately following the merger, First Foundation Bank, a California-chartered banking corporation and wholly owned subsidiary of First Foundation, merged with and into the Bank, with the Bank continuing as the surviving bank. Further information is presented in Note 2 - Acquisition of First Foundation Inc.

Use of Estimates - The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions based on available information. These estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

These estimates are based on historical experience and on various assumptions about the future that are believed to be reasonable based on all available information. Our reported financial position or results of operations may be materially different under changed conditions or when using different estimates and assumptions, particularly with respect to critical accounting policies. In the event that estimates or assumptions prove to differ from actual results, adjustments are made in subsequent periods to reflect more current information.

Reclassifications - Some items in the prior year financial statements were reclassified to conform to the current presentation. Previously, deposit amounts related to certain NOW accounts with limited monthly transaction activity were able to be reclassified to money market accounts to reduce reserve requirements at the Federal Reserve. As there is no longer any impact to reserve requirements across different deposit products, we have discontinued this product reclassification practice and have revised the presentation of those deposits to conform to the current presentation for periods prior to March 31, 2026. Reclassifications had no effect on prior years net income or stockholders’ equity.

Accounting Pronouncements Recently Adopted - As an “emerging growth company” under Section 107 of the JOBS Act, we can take advantage of the extended transition period provided in Section 7(a)(2)(B) of the Securities Act for complying with new or revised accounting standards. Therefore, we can delay the adoption of certain accounting standards until those standards would otherwise apply to non-public business entities. We intend to take advantage of the benefits of this extended transition period for an “emerging growth company” for as long as it is available to us. For standards that we have delayed adoption, we may lack comparability to other companies who have adopted such standards.

ASU No. 2025-05, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets.” ASU 2025-05 provides all entities, when developing reasonable and supportable forecasts as part of estimating expected credit losses on current accounts receivable and/or current contract assets arising from transactions under ASC Topic 606 - Revenue from Contracts with Customers, a practical expedient whereby entities can assume that current conditions as of the balance sheet date do not change for the remaining life of the asset. ASU 2025-05 became effective for us in 2026 and did not have a significant impact on our financial statements.

ASU 2025‑08, “Financial Instruments - Credit Losses (Topic 326): Purchased Loans.” The amendments in ASU 2025-08 amend the guidance in ASC 326 to expand and clarify the accounting for acquired loans, including “purchased seasoned loans,” with the objective of addressing concerns about complexity and potential double counting of expected credit losses in acquisition accounting. ASU 2025-08 requires entities to apply the amendments prospectively to loans acquired on or after the initial application date and does not require retrospective restatement of prior periods. The amendments in this update are effective for annual reporting periods beginning after December 15, 2026, including interim periods within those annual periods, and early adoption is permitted in an interim or annual reporting period in which financial statements have not yet been issued or made available for issuance. The Company early adopted the provisions of ASU 2025-08 in connection with its acquisition of First Foundation, which was completed on April 1, 2026. The Company applied the guidance prospectively to loans acquired in the transaction and will apply the updated guidance to any subsequent acquisitions occurring on or after initial adoption. Early adoption of the ASU 2025-08 affected the timing and measurement of expected credit losses for acquired performing loans. The impact from adoption is included in the accompanying footnotes.

Purchased Credit Deteriorated (“PCD”) Loans. Management performs an assessment of acquired loans to first determine if such loans have experienced a more than insignificant deterioration in credit quality since their origination and thus should be classified and accounted for as PCD loans using a gross-up method where the sum of the loan’s purchase price and allowance for credit losses (“ACL”) becomes its initial amortized cost basis. At acquisition, the ACL for PCD loans is measured in accordance with the Company’s credit loss methodology and is added to the purchase price to establish the initial amortized cost basis under the gross-up approach. Any difference between the amortized cost basis and the unpaid principal balance of the loans is considered to be a non-credit discount or premium. This non-credit discount or premium is accreted or amortized into interest income using the interest method. Subsequent to acquisition, the ACL for PCD loans is determined pursuant to the Bank ACL methodology in the same manner as all other loans. Characteristics of PCD loans include the following: delinquency, payment history since origination, credit scores migration and/or other factors the Bank may become aware of through its initial analysis of acquired loans that may indicate there has been a more than insignificant deterioration in credit quality since a loan’s origination.

Purchased Seasoned Loans. Loans acquired that have not experienced a more than insignificant deterioration in credit quality since origination are deemed purchased seasoned loans (“PSLs”) and are accounted for using the gross-up approach at acquisition described above for PCD loans. All non-PCD loans that are acquired in a business combination are deemed PSLs. Other non-PCD loans are PSLs if they were purchased at least 90 days after origination and the acquirer was not involved in the origination of the loans. At acquisition, the ACL for PSLs is measured in accordance with the Company’s credit-loss methodology and is added to the purchase price to establish the initial amortized cost basis under the gross-up approach. Any difference between the amortized cost basis and the unpaid principal balance of the loans is considered to be a non-credit discount or premium. This non-credit discount or premium is accreted or amortized into interest income using the interest method. Subsequent to acquisition, the ACL for PSLs is determined pursuant to the Bank’s ACL methodology in the same manner as all other loans.

Non-Purchased Credit Deteriorated (non-PCD) Loans. Before the Company’s adoption of ASU 2025-08, Financial Instruments - Credit Losses (Topic 326): Purchased Loans in connection with the First Foundation acquisition on April 1, 2026, acquired loans that are not deemed to have experienced a more-than-insignificant credit deterioration since origination are considered non-PCD. Non-PCD loans are recorded at fair value, with any resulting discount or premium accreted or amortized into interest income over the remaining life of the loan using the interest method. Additionally, upon the purchase or acquisition of non-PCD loans, management measures and records an allowance for credit losses based on the Bank’s methodology for determining the ACL. The ACL for non-PCD loans is recorded through a charge to the provision for credit losses in the period in which the loans are purchased or acquired. Subsequent to acquisition, the allowance for credit losses for non-PCD loans is determined pursuant to the Bank’s ACL methodology in the same manner as all other loans.

Recent Accounting Pronouncements Not Yet Adopted - ASU No. 2024-03, “Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses.” ASU 2024-03 requires disaggregated disclosure of income statement expenses for public business entities. ASU 2024-03 requires new financial statement disclosures in tabular format, disaggregating information about prescribed categories underlying any relevant income statement expense caption. The prescribed categories include, among other things, employee compensation, depreciation, and intangible asset amortization. Additionally, entities must disclose the total amount of selling expenses and, in annual reporting periods, an entity’s definition of selling expenses. ASU 2024-03 will be effective for us, on a prospective basis, for annual periods beginning in 2027, and interim periods within fiscal years beginning in 2028, though early adoption and retrospective application is permitted. ASU 2024-03 is not expected to have a significant impact on our financial statements.

ASU No. 2025-06, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software.” ASU 2025-06 simplifies and modernizes the accounting for internal-use software by removing prescriptive project stage guidance and introducing a new capitalization threshold. Under the revised standard, software development costs are capitalized when management authorizes and commits funding for the project and it is probable the software will be completed and used as intended. ASU 2025-06 will be effective in 2028 and is not expected to have a significant impact on our financial statements.

ASU 2025‑09, “Derivatives and Hedging (Topic 815): Hedge Accounting Improvements.” ASU 2025-09 amends ASC 815 to align hedge accounting more closely with an entity’s economic risk management practices. Key amendments include (i) to allow designating a variable price component of a nonfinancial forecasted purchase or sale as the hedged risk, (ii) to allow grouping individual forecasted transactions with similar (not identical) risk exposures, (iii) a new model for hedging forecasted interest on variable-rate debt, enabling changes in index or tenor without dedesignation, subject to simplifying assumptions, and (iv) additional clarifications related to hedge accounting of nonfinancial components, net written options, and dual-hedge strategies. ASU 2025-09 will be effective for us beginning in 2027, though early adoption is permitted. ASU 2025-09 is not expected to have a significant impact on our financial statements.

ASU 2025‑11, “Interim Reporting (Topic 270): Narrow‑Scope Improvements.” ASU 2025-11 clarifies and enhances guidance under ASC 270 on interim financial reporting by (i) clarifying the scope of ASC 270 such that it now explicitly applies only to entities that issue complete interim financial statements and related notes under U.S. GAAP, (ii) establishing clear guidance on the form of interim statements and notes, incorporating a comprehensive list of required interim disclosures drawn from across the ASC, and (iii) introducing a requirement to disclose material events and changes occurring after the end of the last annual period that could impact interim results. ASU 2025-11 will be effective for us for interim periods beginning in 2028, though early adoption is permitted. ASU 2025-11 is not expected to have a significant impact on our financial statements.