1 U P X 如本例所示，使用黑色墨水筆用X標記您的投票。 請不要在指定區域之外書寫。 03H8TD+ +提案-董事會建議對提案1-3進行投票。 1.批准合併和合並協議。考慮並 表決合併，以及截至2021年4月16日與馬林銀行(Bank of Marin Bancorp，簡稱BMRC)的合併和重組計劃 協議(“合併 協議”)，根據該協議，AMRB將與BMRC合併並併入BMRC，BMRC 將繼續存在(“合併”)，緊接着 AMRB的全資子公司American River將合併 2.休會。若要批准延期或推遲 特別會議(如有必要或適當)，包括 徵集額外的委託書以批准合併和合並協議 ；以及； 反對棄權 請準確簽署此處顯示的姓名。共同所有人應各自簽字。作為律師、遺囑執行人、管理人、公司高管、受託人、監護人或託管人簽名時，請提供 全稱。 簽名1-請將簽名放在方框內。簽名2-請把簽名放在盒子裏。日期(mm/dd/yyyy)-請在下面打印日期。 授權簽名-必須填寫此部分才能計算您的選票。-日期和簽名如下B 注意：代理人有權根據其酌情決定權，就特別會議或其任何和所有延期或休會可能適當提出採取行動的所有其他事項進行投票。 q如果是郵寄投票，請簽名。 q如果是郵寄投票，請簽名, 拆卸並將所附信封中的底部退回。Q 反對棄權的特別會議代理卡 3.指定的高管(NEO)薪酬提案。 在諮詢(非約束性)基礎上批准，將支付給AMRB與合併相關的NEO的補償 。 000004 Mr A樣本 指定(如果有) 添加1 添加2 添加3 添加4 添加5 添加6 認可_LINE_5 0 6 1 4 9 mr A樣本(此區域設置為可容納 140個字符)mr A樣本和mr A樣本和 mr A樣本和mr A樣本和 mr A樣本和 C 1234567890 J N T C123456789 MMMMMMMMMMMM M MMMMMMM 000000000.000000分機 000000000.000000分機 000000000.000000分機 }000000000.000000轉 000000000.000000轉 000000000.000000轉 如果沒有電子投票， 刪除二維碼並控制# ∆≈ 您可以在線投票或通過電話投票，而不是郵寄此卡。 在線 轉到www.envisionreports.com/amrb或 掃描二維碼-登錄詳細信息位於下面的陰影欄中。 節省紙張、時間和金錢美國領土和加拿大 以電子方式提交的選票必須 在2021年7月28日東部時間凌晨1：00之前收到 您的投票很重要-以下是投票方法！

Small steps make an impact. Help the environment by consenting to receive electronic delivery, sign up at www.envisionreports.com/AMRB PROXY FOR THE SPECIAL MEETING OF SHAREHOLDERS TO BE HELD WEDNESDAY, JULY 28, 2021 The undersigned holder of common stock of American River Bankshares acknowledges receipt of a copy of the Notice of Special Meeting of Shareholders of American River Bankshares and the accompanying Joint Proxy Statement/Prospectus dated June 18, 2021 and revoking any Proxy heretofore given, hereby constitutes and appoints David E. Ritchie, Jr. and Mitchell A. Derenzo, and each of them, with full power of substitution, as attorneys and proxies to appear and vote all of the shares of common stock of American River Bankshares standing in the name of the undersigned which the undersigned could vote if personally present and acting at the Special Meeting of Shareholders of American River Bankshares to be held at Homewood Suites by Hilton, 10700 White Rock Road, Rancho Cordova, CA 95670 on Wednesday, July 28, 2021 at 3:00 p.m. Pacific Time or at any and all postponements or adjournments thereof, upon the items listed on the reverse side as set forth in the Notice of Meeting and Joint Proxy Statement/Prospectus and to vote according to their discretion on all other matters which may be properly presented for action at the Special Meeting or any and all postponements or adjournments thereof. THE BOARD OF DIRECTORS RECOMMENDS A VOTE “FOR” PROPOSALS 1, 2 AND 3. THE PROXY, WHEN PROPERLY EXECUTED, WILL BE VOTED AS DIRECTED. IF NO DIRECTION IS MADE, IT WILL BE VOTED “FOR” EACH OF THE PROPOSALS. THIS PROXY IS SOLICITED BY, AND ON BEHALF OF, THE BOARD OF DIRECTORS AND MAY BE REVOKED PRIOR TO ITS EXERCISE. PLEASE SIGN AND DATE ON REVERSE SIDE. Proxy — American River Bankshares q IF VOTING BY MAIL, SIGN, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE. q Non-Voting Items C + + Change of Address — Please print new address below. Comments — Please print your comments below. Meeting Attendance Mark box to the right if you plan to attend the Special Meeting. 2021 Special Meeting Admission Ticket 2021 Special Meeting of Shareholders of American River Bankshares Wednesday, July 28, 2021 at 3:00 p.m. Pacific Time Homewood Suites by Hilton 10700 White Rock Road, Rancho Cordova, CA 95670 Upon arrival, please present this admission ticket and photo identification at the registration desk.