Filed by: HomeStreet, Inc. Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 of the Securities Exchange Act of 1934 Subject Company: HomeStreet, Inc. Commission File No.: 001-35424 The following 2023 Affinity Lending Annual report was provided to all affinity lenders and included a discussion of the proposed transaction between HomeStreet, Inc. and FirstSun Capital Bancorp.

2 0 2 3 A N N U A L R E P O R T

As we begin the New Year, let us rst reect back on 2023. Though it was a challenging year in the mortgage and banking industry, we are thankful for a year of growing and learning with the focus to better serve our customers. 2

$2,500 2023 in Review Average Affinity benefit savings on a home purchase or refinance $12M In Down Payment Assistance 750+ Hours of giving back to the community 825 Employees/members attended our workshops to learn about the Home Buying process 47 Continuing education courses completed to grow as industry experts 90 Non-profits we partner with and support 3

As we look into 2024, the question remains… will mortgage interest rates drop? In a press release dated January18th,2024, Fannie Mae’s analysts noted mortgage rates are expected to dip below 6 percent in 2024, boosting home sales. The article further indicated that the housing market is expected to begin a gradual return to a more normal balance in 2024, following years of signicant oscillations in mortgage rates. The lower rate environment is expected to boost renance volumes, which are already on the upswing. To read the full article click here. 4

With the recent announcement of the HomeStreet, Inc. and FirstSun Capital Bancorp merger 1, we want to assure you the HomeStreet Bank Afnity Program will continue to operate with the same values and services in providing our Afnity customers with mortgage and banking benets coupled with Down Payment Assistance programs and homebuyer education. No bank branches will be closed as part of the merger, and we will continue to operate under the HomeStreet name in the markets in which we currently operate. For customers, it is business as usual—but better. You will continue to be served by the same HomeStreet personnel who have served you well to this point, with an expanded product suite and greater resources. HomeStreet and FirstSun share strong commitments to customer service and a deep commitment to supporting the communities we serve. 1 See disclosures on page 7 5

This year is a fresh canvas, and we are here to support our customers with their mortgage and banking needs every step of the way. We are grateful for your partnership and look forward to a prosperous 2024! Kelley Hollinger Vice President|Regional Manager Afnity Program NMLS#: 2359873 Your questions, comments or suggestions are always welcome. Do you know another company, membership organization, or educational/medical institution that could benet from the Afnity Program? Please contact Kelley Hollinger at: 510.427.0020 or kelley.hollinger@homestreet.com 6

7 1 CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS This communication contains “forward-looking statements” within the meaning of the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, regarding the proposed transaction between HomeStreet, Inc. (“HomeStreet”) and FirstSun Capital Bancorp (“FirstSun”). In general, forward-looking statements can be identied through use of words such as “may,” “believe,” “expect,” “anticipate,” “intend,” “will,” “should,” “plan,” “estimate,” “predict,” “continue” and “potential” or the negative of these terms or other comparable terminology, and include statements related to the expected timing, completion, nancial benets, and other effects of the proposed mergers (the "Merger"). Forward-looking statements are not historical facts and represent management’s beliefs, based upon information available at the time the statements are made, with regard to the matters addressed; they are not guarantees of future performance. Actual results may prove to be materially different from the results expressed or implied by the forward-looking statements. Forward-looking statements are subject to numerous assumptions, risks and uncertainties that change over time and could cause actual results or nancial conditions to differ materially from those expressed in or implied by such statements. Factors that could cause or contribute to such differences include, but are not limited to, (1) expected cost savings, synergies and other nancial benets from the Merger not being realized within the expected time frames and costs or difculties relating to integration matters being greater than expected, (2) the ability of HomeStreet to obtain the necessary approval by its shareholders, (3) the ability of FirstSun and HomeStreet to obtain required governmental approvals of the Merger, (4) the ability of FirstSun to consummate their investment agreements to obtain the necessary capital to support the transaction, and (5) the failure of the closing conditions in the denitive Agreement and Plan of Merger (the “Merger Agreement”), dated as of January 16, 2024, by and between HomeStreet and FirstSun to be satised, or any unexpected delay in closing the Merger. Further information regarding additional factors that could affect the forward-looking statements can be found in the cautionary language included under the headings “Cautionary Note Regarding Forward-Looking Statements” (in the case of FirstSun), “Forward-Looking Statements” (in the case of HomeStreet), and “Risk Factors” in FirstSun’s and HomeStreet’s Annual Reports on Form 10-K for the year ended December 31, 2022, and other documents subsequently led by FirstSun and HomeStreet with the U.S. Securities and Exchange Commission (“SEC”). ADDITIONAL INFORMATION AND WHERE TO FIND IT IN CONNECTION WITH THE MERGER BETWEEN FIRSTSUN, A DELAWARE CORPORATION, AND HOMESTREET, A WASHINGTON CORPORATION, FIRSTSUN WILL FILE WITH THE SEC A REGISTRATION STATEMENT ON FORM S-4 THAT WILL INCLUDE A PROXY STATEMENT OF HOMESTREET AND A PROSPECTUS OF FIRSTSUN, AS WELL AS OTHER RELEVANT DOCUMENTS CONCERNING THE PROPOSED TRANSACTION. INVESTORS AND SECURITY HOLDERS, PRIOR TO MAKING ANY INVESTMENT OR VOTING DECISION, ARE URGED TO READ THE REGISTRATION STATEMENT AND PROXY STATEMENT/PROSPECTUS WHEN IT BECOMES AVAILABLE (AND ANY OTHER DOCUMENTS FILED WITH THE SEC IN CONNECTION WITH THE MERGER OR INCORPORATED BY REFERENCE INTO THE PROXY STATEMENT/PROSPECTUS) BECAUSE SUCH DOCUMENTS WILL CONTAIN IMPORTANT INFORMATION REGARDING THE MERGER. Investors and security holders may obtain free copies of these documents and other documents led with the SEC on its website at www.sec.gov. Investors and security holders may also obtain free copies of the documents led with the SEC by (i) FirstSun on its website at https://ir.rstsuncb.com/investor-relations/default.aspx, and (ii) HomeStreet on its website at https://ir.homestreet.com/sec-lings/all-lings/default.aspx. This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation, or sale would be unlawful prior to registration or qualication under the securities laws of such jurisdiction. PARTICIPANTS IN THE SOLICITATION FirstSun, HomeStreet and certain of their directors and executive ofcers may be deemed participants in the solicitation of proxies from shareholders of HomeStreet in connection with the proposed Merger. Information regarding the directors and executive ofcers of FirstSun and HomeStreet and other persons who may be deemed participants in the solicitation of the shareholders of HomeStreet in connection with the proposed Merger will be included in the proxy statement/prospectus for HomeStreet’s special meeting of shareholders, which will be led by FirstSun with the SEC. Information about the directors and ofcers of FirstSun and their ownership of FirstSun’s common stock can be found in FirstSun’s annual report on Form 10-K, as led with the SEC on March 16, 2023, and other documents subsequently led by FirstSun with the SEC. Information about the directors and ofcers of HomeStreet and their ownership of HomeStreet’s common stock can be found in HomeStreet’s denitive proxy statement in connection with its 2023 annual meeting of shareholders, as led with the SEC on April 11, 2023, and other documents subsequently led by HomeStreet with the SEC. Additional information regarding the interests of such participants will be included in the proxy statement/prospectus and other relevant documents regarding the proposed Merger led with the SEC when they become available.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS This communication contains “forward-looking statements” within the meaning of the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, regarding the proposed transaction between HomeStreet, Inc. (“HomeStreet”) and FirstSun Capital Bancorp (“FirstSun”). In general, forward-looking statements can be identified through use of words such as “may,” “believe,” “expect,” “anticipate,” “intend,” “will,” “should,” “plan,” “estimate,” “predict,” “continue” and “potential” or the negative of these terms or other comparable terminology, and include statements related to the expected timing, completion, financial benefits, and other effects of the proposed mergers (the "Merger"). Forward-looking statements are not historical facts and represent management’s beliefs, based upon information available at the time the statements are made, with regard to the matters addressed; they are not guarantees of future performance. Actual results may prove to be materially different from the results expressed or implied by the forward-looking statements. Forward-looking statements are subject to numerous assumptions, risks and uncertainties that change over time and could cause actual results or financial conditions to differ materially from those expressed in or implied by such statements. Factors that could cause or contribute to such differences include, but are not limited to, (1) expected cost savings, synergies and other financial benefits from the Merger not being realized within the expected time frames and costs or difficulties relating to integration matters being greater than expected, (2) the ability of HomeStreet to obtain the necessary approval by its shareholders, (3) the ability of FirstSun and HomeStreet to obtain required governmental approvals of the Merger, (4) the ability of FirstSun to consummate their investment agreements to obtain the necessary capital to support the transaction, and (5) the failure of the closing conditions in the definitive Agreement and Plan of Merger (the “Merger Agreement”), dated as of January 16, 2024, by and between HomeStreet and FirstSun to be satisfied, or any unexpected delay in closing the Merger. Further information regarding additional factors that could affect the forward-looking statements can be found in the cautionary language included under the headings “Cautionary Note Regarding Forward-Looking Statements” (in the case of FirstSun), “Forward- Looking Statements” (in the case of HomeStreet), and “Risk Factors” in FirstSun’s and HomeStreet’s Annual Reports on Form 10-K for the year ended December 31, 2022, and other documents subsequently filed by FirstSun and HomeStreet with the U.S. Securities and Exchange Commission (“SEC”). ADDITIONAL INFORMATION AND WHERE TO FIND IT IN CONNECTION WITH THE MERGER BETWEEN FIRSTSUN, A DELAWARE CORPORATION, AND HOMESTREET, A WASHINGTON CORPORATION, FIRSTSUN WILL FILE WITH THE SEC A REGISTRATION STATEMENT ON FORM S-4 THAT WILL INCLUDE A PROXY STATEMENT OF HOMESTREET AND A PROSPECTUS OF FIRSTSUN, AS WELL AS OTHER RELEVANT DOCUMENTS CONCERNING THE PROPOSED TRANSACTION. INVESTORS AND SECURITY HOLDERS, PRIOR TO MAKING ANY INVESTMENT OR VOTING DECISION, ARE URGED TO READ THE REGISTRATION STATEMENT AND PROXY STATEMENT/PROSPECTUS WHEN IT BECOMES AVAILABLE (AND ANY OTHER DOCUMENTS FILED WITH THE SEC IN CONNECTION WITH THE MERGER OR INCORPORATED BY REFERENCE INTO THE PROXY STATEMENT/PROSPECTUS) BECAUSE SUCH DOCUMENTS WILL CONTAIN IMPORTANT INFORMATION REGARDING THE MERGER. Investors and security holders may obtain free copies of these documents and other documents filed with the SEC on its website at www.sec.gov. Investors and security holders may also obtain free copies of the documents filed with the SEC by (i) FirstSun on its website at https://ir.firstsuncb.com/investor-

relations/default.aspx, and (ii) HomeStreet on its website at https://ir.homestreet.com/sec-filings/all- filings/default.aspx. This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation, or sale would be unlawful prior to registration or qualification under the securities laws of such jurisdiction. PARTICIPANTS IN THE SOLICITATION FirstSun, HomeStreet and certain of their directors and executive officers may be deemed participants in the solicitation of proxies from shareholders of HomeStreet in connection with the proposed Merger. Information regarding the directors and executive officers of FirstSun and HomeStreet and other persons who may be deemed participants in the solicitation of the shareholders of HomeStreet in connection with the proposed Merger will be included in the proxy statement/prospectus for HomeStreet’s special meeting of shareholders, which will be filed by FirstSun with the SEC. Information about the directors and officers of FirstSun and their ownership of FirstSun’s common stock can be found in FirstSun’s annual report on Form 10-K, as filed with the SEC on March 16, 2023, and other documents subsequently filed by FirstSun with the SEC. Information about the directors and officers of HomeStreet and their ownership of HomeStreet’s common stock can be found in HomeStreet’s definitive proxy statement in connection with its 2023 annual meeting of shareholders, as filed with the SEC on April 11, 2023, and other documents subsequently filed by HomeStreet with the SEC. Additional information regarding the interests of such participants will be included in the proxy statement/prospectus and other relevant documents regarding the proposed Merger filed with the SEC when they become available.