Results of Operations and Financial Condition On July 27, 2026, Bank of Marin Bancorp, "Bancorp" (Nasdaq: BMRC), parent company of Bank of Marin, released its financial results for the quarter ended June 30, 2026. A copy of the press release is included as Exhibit 99.1. The press release will be available on Bank of Marin's website at http://www.bankofmarin.com under “Investor Relations/News & Market Data/Press Releases" and "Presentations” on July 27, 2026. Section 7 - Regulation FD

Other Events In the press release, Bancorp announced that on July 23, 2026, its Board of Directors approved a quarterly cash dividen d of $ 0.25 p er share. The cash dividend is payable on August 13, 2026, to shareholders of record at the close of business on August 6, 2026. A copy of the press release is attached to this report as Exhibit 99.1. Section 9 - Financial Statements and Exhibits

Other Events In the press release, Bancorp announced that on April 23, 2026, its Board of Directors approved a quarterly cash dividen d of $ 0.25 p er share. The cash dividend is payable on May 14, 2026, to shareholders of record at the close of business on May 7, 2026. A copy of the press release is attached to this report as Exhibit 99.1. Section 9 - Financial Statements and Exhibits

Results of Operations and Financial Condition On April 27, 2026, Bank of Marin Bancorp, "Bancorp" (Nasdaq: BMRC), parent company of Bank of Marin, released its financial results for the quarter ended March 31, 2026. A copy of the press release is included as Exhibit 99.1. The press release will be available on Bank of Marin's website at http://www.bankofmarin.com under “Investor Relations/News & Market Data/Press Releases" and "Presentations” on April 27, 2026. Section 7 - Regulation FD

Principal Accounting Officer — Susan Ramirez: Susan Ramirez was internally promoted to Principal Accounting Officer.

Non-Reliance on Previously Issued Financial Statements or a Related Audit Report or Completed Interim Review. (a) Restatement of Historical Financial Results On February 23, 2026, the Board of Directors (the “Board”) of Bank of Marin Bancorp (the “Company”), based on the recommendation of, and after consultation with, the Board’s Audit Committee, the Company’s management and the Company’s independent registered public accounting firm, Baker Tilly, concluded that the Company’s previously issue…

Results of Operations and Financial Condition On January 26, 2026, Bank of Marin Bancorp, "Bancorp" (Nasdaq: BMRC), parent company of Bank of Marin, released its financial results for the fourth quarter and year ended December 31, 2025. A copy of the press release is included as Exhibit 99.1. Section 8 - Other Events

Other Events In the press release, Bancorp announced that on January 22, 2026, its Board of Directors approved a quarterly cash dividend of $0.25 per share. The cash dividend is payable on February 12, 2026, to shareholders of record at the close of business on February 5, 2026. A copy of the press release is attached to this report as Exhibit 99.1. Section 9 - Financial Statements and Exhibits

CREATION OF A DIRECT FINANCIAL OBLIGATION OR AN OBLIGATION UNDER AN OFF-BALANCE SHEET ARRANGEMENT OF A REGISTRANT The information set forth in

ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT Subordinated Note Offering On November 19, 2025, Bank of Marin Bancorp, a California corporation (the “Company”)(Nasdaq: BMRC), and parent company of Bank of Marin, issued a press release announcing that it entered into Subordinated Note Purchase Agreements (the “Note Purchase Agreement”) pursuant to which the Company issued and sold $45 million in aggregate principal amount of its 6.750% Fixed-to-Floating Rate Subordinated Notes due 2035 (the “Notes…

Other Events In the press release, Bancorp announced that on October 23, 2025, its Board of Directors approved a quarterly cash dividen d of $ 0.25 p er share. The cash dividend is payable on November 13, 2025, to shareholders of record at the close of business on November 6, 2025. A copy of the press release is attached to this report as Exhibit 99.1. Section 9 - Financial Statements and Exhibits

Results of Operations and Financial Condition On October 27, 2025, Bank of Marin Bancorp, "Bancorp" (Nasdaq: BMRC), parent company of Bank of Marin, released its financial results for the quarter ended September 30, 2025. A copy of the press release is included as Exhibit 99.1 and the related Third Quarter 2025 Earnings Presentation is included as Exhibit 99.2. The press release and presentation will be available on Bank of Marin's website at http://www.bankofmarin.com under “ Investor Relati…

Other Events In the press release, Bancorp announced that on July 24, 2025, its Board of Directors approved a quarterly cash dividen d of $ 0.25 per share. The cash dividend is payable on August 14, 2025, to shareholders of record at the close of business on August 7, 2025. Following a review of industry practice and consultation with Bancorp’s legal counsel, certain revisions to Bancorp’s Insider Trading Policy were approved by the board of directors at a meeting on July 24, 2025. Among the…

Results of Operations and Financial Condition On July 28, 2025, Bank of Marin Bancorp, "Bancorp" (Nasdaq: BMRC), parent company of Bank of Marin, released its financial results for the quarter ended June 30, 2025. A copy of the press release is included as Exhibit 99.1 and the related Second Quarter 2025 Earnings Presentation is included as Exhibit 99.2. The press release and presentation will be available on Bank of Marin's website at http://www.bankofmarin.com under “ Investor Relations/New…

Other Events Bank of Marin, the wholly owned subsidiary of Bank of Marin Bancorp (Nasdaq: BMRC), announced that on July 24, 2025, its Board of Directors approved the repurchase of up to $25.0 million of Bancorp's common stock through July 31, 2027. This plan will replace the existing share repurchase program expiring on July 31, 2025. Under the repurchase program, Bancorp may purchase shares of its common stock through various means such as open market transactions, including block purchases,…

Changes in Registrant's Certifying Accountant On June 3, 2025, Bank of Marin Bancorp, (the "Company") was notified that Moss Adams LLP ("Moss Adams"), the Company's independent registered public accounting firm, merged with Baker Tilly US, LLP effective on June 3, 2025. The combined audit practices operate as Baker Tilly US, LLP (“Baker Tilly”). In connection with the notification of the merger, Moss Adams has resigned as the auditors of the Company and the Audit Committee of the Company’s Bo…

Other Events In the press release, Bancorp announced that on April 24, 2025, its Board of Directors approved a quarterly cash dividen d of $ 0.25 per share. The cash dividend is payable on May 15, 2025, to shareholders of record at the close of business on May 8, 2025. A copy of the press release is attached to this report as Exhibit 99.1. Section 9 - Financial Statements and Exhibits

Results of Operations and Financial Condition On April 28, 2025, Bank of Marin Bancorp, "Bancorp" (Nasdaq: BMRC), parent company of Bank of Marin, released its financial results for the quarter ended March 31, 2025. A copy of the press release is included as Exhibit 99.1 and the related First Quarter 2025 Earnings Presentation is included as Exhibit 99.2. The press release and presentation will be available on Bank of Marin's website at http://www.bankofmarin.com under “ Investor Relations/Ne…

Director — Mr. William McDevitt, Mr. Sanjiv Sanghvi: Directors are retiring and will not stand for re-election at the annual meeting.

Results of Operations and Financial Condition On January 27, 2025, Bank of Marin Bancorp, "Bancorp" (Nasdaq: BMRC), parent company of Bank of Marin, released its financial results for the fourth quarter and year ended December 31, 2024. A copy of the press release is included as Exhibit 99.1. Section 8 - Other Events

Other Events In the press release, Bancorp announced that on January 23, 2025, its Board of Directors approved a quarterly cash dividend of $0.25 per share. The cash dividend is payable on February 13, 2025, to shareholders of record at the close of business on February 6, 2025. A copy of the press release is attached to this report as Exhibit 99.1. Section 9 - Financial Statements and Exhibits

Chief Financial Officer — Dave Bonaccorso: Dave Bonaccorso was promoted to Chief Financial Officer and received a new compensation package.

Chief Financial Officer and Principal Accounting Officer — Tani Girton: Tani Girton is retiring and Dave Bonaccorso will succeed her as CFO and Principal Accounting Officer.

Other Events In the press release, Bancorp announced that on October 24, 2024, its Board of Directors approved a quarterly cash dividen d of $ 0.25 per share. The cash dividend is payable on November 14, 2024, to shareholders of record at the close of business on November 7, 2024. A copy of the press release is attached to this report as Exhibit 99.1. Section 9 - Financial Statements and Exhibits

Results of Operations and Financial Condition On October 28, 2024, Bank of Marin Bancorp, "Bancorp" (Nasdaq: BMRC), parent company of Bank of Marin, released its financial results for the quarter ended September 30, 2024. A copy of the press release is included as Exhibit 99.1 and the related Third Quarter 2024 Earnings Presentation is included as Exhibit 99.2. The press release and presentation will be available on Bank of Marin's website at http://www.bankofmarin.com under “ Investor Relati…