FirstSun Capital Bancorp (FSUN) 8-KStrategic Merger Update a P R I L 3 0 , 2 0 2 4

Exhibit 2.1

EXECUTION FORM

AMENDMENT NO. 1 TO

AGREEMENT AND PLAN OF MERGER

This AMENDMENT NO. 1, dated April 30, 2024 (this “Amendment”), amends the Agreement and Plan of Merger, dated January 16, 2024 (the “Agreement”), by and among HomeStreet, Inc., a Washington corporation (“Company”), FirstSun Capital Bancorp, a Delaware corporation (“Parent”), and Dynamis Subsidiary, Inc., a Washington corporation and a direct and wholly owned subsidiary of Parent (“Merger Sub”). Capitalized terms used and not defined herein have the meanings ascribed to such terms in the Agreement.

RECITAL:

WHEREAS, the parties to the Agreement now desire to amend the Agreement in accordance with Section 9.1 of the Agreement as set forth herein.

NOW, THEREFORE, in consideration of the mutual covenants, representations, warranties and agreements contained in this Amendment, and intending to be legally bound by this Amendment, the Parties agree as follows:

“WHEREAS, concurrently with the execution and delivery of this Agreement or the Amendment, as applicable, and as a condition to Company’s willingness to enter into this Agreement and the Amendment, Parent has entered into separate investment agreements (each, an “Investment Agreement”) by and between Parent and the investors named therein (the “Investors” and each, an “Investor”), whereby the Investors will make an equity investment in Parent of $80 million concurrently with the execution and delivery of this Agreement in exchange for 2,461,538 shares of Parent Common Stock (the “Initial Investment”) and $140 million concurrently with the Closing of the Merger in exchange for 4,307,692 shares of Parent Common Stock (the “Equity Financing”).

“WHEREAS, no later than the Second Step Effective Time, (i) Sunflower Bank, N.A., a national banking association and a wholly owned Subsidiary of Parent (“Parent Bank”) will convert from a national banking association into a Texas state chartered bank that will be a member of the Federal Reserve System (such resulting entity, the “New Parent Bank” or “Sunflower Bank” and such conversion and admission to the Federal Reserve System, collectively, the “Conversion”) and (ii) immediately following the Second Step Merger, HomeStreet Bank, a Washington state-chartered bank and a wholly owned Subsidiary of Company (“Company Bank”) will merge with and into New Parent Bank (the “Bank Merger”) so that New Parent Bank is the surviving entity (the “Surviving Bank”) in the Bank Merger.”

“Conversion and Bank Merger. No later than the Second Step Effective Time, subject to the terms and conditions of this Agreement, as amended, Parent Bank shall convert from a national banking association into New Parent Bank, a Texas state chartered bank, that will be a member of the Federal Reserve System. Immediately following the Second Step Merger, Company Bank will merge with and into New Parent Bank, with New Parent Bank being the surviving entity in the Bank Merger, and following the Bank Merger, the separate corporate existence of Company Bank shall cease. The parties agree that the Bank Merger shall become effective immediately after the Second Step Effective Time. The Bank Merger shall be implemented pursuant to an agreement and plan of merger, in a form to be mutually agreed upon by the Parties (the “Bank Merger Agreement”). The Company shall cause Company Bank, and Parent shall cause New Parent Bank, to execute such certificates or articles of merger and such other documents and certificates as are necessary to make the Bank Merger effective (“Bank Merger Certificates”) immediately following the Second Step Effective Time. The Bank Merger shall become effective at such time and date as specified in the Bank Merger Agreement in accordance with applicable law, or at such other time as shall be provided by applicable law.”

“and as is necessary for the Conversion (after providing reasonable advance notice of the proposed amendment to the Company)”

“As used in this Agreement, the term “Requisite Regulatory Approvals” shall mean all regulatory authorizations, consents, orders and approvals (and the expiration or termination of all statutory waiting periods in respect thereof) (i) from the Federal Reserve Board (in respect of the Conversion, the Mergers, and the Bank Merger), and the Texas Department of Banking (in respect of the Conversion and the Bank Merger), and (ii) set forth in Section 3.4 or Section 4.4 that are necessary to consummate the transactions contemplated by this Agreement (including the Conversion, the Mergers and the Bank Merger) or those the failure of which to be obtained would reasonably be expected to have a Material Adverse Effect on the Surviving Entity.”

Additional Common Equity Raise. Parent shall use its reasonable best efforts to enter into, within fifty (50) days after the date of the Amendment, an amendment to the Acquisition Finance Securities Purchase Agreement, by and among Parent and the other signatories thereto, dated January 16, 2024 (the “Acquisition Finance SPA”), by which Parent will agree to issue, at the Closing as part of the Equity Financing, an additional 461,539 shares of Parent Common Stock in exchange for an equity investment in Parent of $15 million (or such greater amount as the Parties may agree) to one or more Investors or such other investors that execute joinders to the Acquisition Finance SPA (in a form reasonably acceptable to Company).

Subordinated Debt Issuance. Parent shall use its reasonable best efforts to enter into, prior to or as of the Closing, one or more definitive agreements, each of which will close contemporaneously with the Closing, whereby Parent will issue, at the Closing, an aggregate principal amount of at least $48,500,000 in subordinated debt that qualifies as Tier 2 capital.

Company Commercial Real Estate Loan Sale. Each of Company and Parent shall reasonably cooperate with each other to identify approximately $300,000,000 (based on the principal balance), or such other amounts as the Parties may reasonably determine are deemed necessary to obtain the Requisite Regulatory Approvals, of Company’s or its Subsidiaries’ Commercial Real Estate Loans (as hereinafter defined) to be disposed of by Company or its Subsidiaries, such disposition to be contingent upon the Closing and either, as the Parties hereto reasonably determine, effective as of, or as soon as reasonably practicable after, the Closing, in all cases to ensure that such Loan Sale (as hereinafter defined) is accounted for in the immediate post-closing balance sheet of Parent and/or its Subsidiaries. In addition, Company shall use its reasonable best efforts to, and cause its Subsidiaries to use reasonable best efforts to, so dispose of, and enter into one or more Loan Sale Agreements (as hereinafter defined) providing for the dispositions of, such Commercial Real Estate Loans for the best commercially reasonable available price (the “Loan Sale”). In furtherance of the foregoing, Company shall, and shall cause its Subsidiaries to, (i) reasonably cooperate with Parent in connection with the Loan Sale, (ii) consult with and keep Parent apprised of the status of the Loan Sale, (iii) provide Parent with drafts of any contract, agreement or arrangement (if any) relating to the Loan Sale (a “Loan Sale Agreement”) and (iv) provide Parent with a reasonable opportunity to review and comment on any such Loan Sale Agreements, and consider in good faith any reasonable comments made by Parent. “Commercial Real Estate Loans” as used in this Section 6.23, shall mean acquisition, development, and construction lending, and the financing of non-owner occupied real estate held for lease to third parties, including multi-family loans.

“Notwithstanding anything to the contrary in this Section 8.2(b), if the Company receives a bona fide written Acquisition Proposal from a third party after the date of the Amendment but prior to 11:59 p.m., New York time on May 30, 2024 (the “End Date”) (including any third party re-making an Acquisition Proposal that was initially made to the Company prior to the date of the Agreement), which Acquisition Proposal (x) did not result from the Company’s breach of Section 6.12(a) and (y) the Company has publicly announced within the later of (i) the End Date and (ii) ten (10) days after Company’s receipt of such Acquisition Proposal constitutes a Superior Proposal, and in connection therewith this Agreement is terminated (A) by the Company pursuant to Section 8.1(f) (Recommendation Change) or (B) by Parent pursuant to Section 8.1(h)(i) (Recommendation Change), in either case, within the later of (i) the End Date and (ii) ten (10) days after Company’s receipt of such Acquisition Proposal, then the Termination Fee paid or payable by the Company pursuant to 8.2(b)(i) or (ii), as applicable, shall be reduced to $2,600,000 and, in addition, within two (2) business days after submission of documentation therefor, the Company shall reimburse Parent for any and all reasonable out-of-pocket fees and expenses (including reasonable fees and expenses of outside counsel, accountants, investment banking firms and other financial advisors, experts, consultants and other advisors or representatives) incurred or accrued by it or its affiliates in connection with or related to the due diligence, negotiation, evaluation, preparation, authorization, execution or performance of this Agreement and the transactions contemplated by this Agreement (for the avoidance of doubt, including this Amendment).”

[Signature pages follow]

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be signed by their respective officers thereunto duly authorized, all as of the date first written above.

[Signature Page to Amendment No. 1 to Agreement and Plan of Merger]

[Signature Page to Amendment No. 1 to Agreement and Plan of Merger]