1 U P X 如本例所示，使用黑色墨水笔用X标记您的投票。 请不要在指定区域之外书写。 03H8TD+ +提案-董事会建议对提案1-3进行投票。 1.批准合并和合并协议。考虑并 表决合并，以及截至2021年4月16日与马林银行(Bank of Marin Bancorp，简称BMRC)的合并和重组计划 协议(“合并 协议”)，根据该协议，AMRB将与BMRC合并并并入BMRC，BMRC 将继续存在(“合并”)，紧接着 AMRB的全资子公司American River将合并 2.休会。若要批准延期或推迟 特别会议(如有必要或适当)，包括 征集额外的委托书以批准合并和合并协议 ；以及； 反对弃权 请准确签署此处显示的姓名。共同所有人应各自签字。作为律师、遗嘱执行人、管理人、公司高管、受托人、监护人或托管人签名时，请提供 全称。 签名1-请将签名放在方框内。签名2-请把签名放在盒子里。日期(mm/dd/yyyy)-请在下面打印日期。 授权签名-必须填写此部分才能计算您的选票。-日期和签名如下B 注意：代理人有权根据其酌情决定权，就特别会议或其任何和所有延期或休会可能适当提出采取行动的所有其他事项进行投票。 q如果是邮寄投票，请签名。 q如果是邮寄投票，请签名, 拆卸并将所附信封中的底部退回。Q 反对弃权的特别会议代理卡 3.指定的高管(NEO)薪酬提案。 在咨询(非约束性)基础上批准，将支付给AMRB与合并相关的NEO的补偿 。 000004 Mr A样本 指定(如果有) 添加1 添加2 添加3 添加4 添加5 添加6 认可_LINE_5 0 6 1 4 9 mr A样本(此区域设置为可容纳 140个字符)mr A样本和mr A样本和 mr A样本和mr A样本和 mr A样本和 C 1234567890 J N T C123456789 MMMMMMMMMMMM M MMMMMMM 000000000.000000分机 000000000.000000分机 000000000.000000分机 }000000000.000000转 000000000.000000转 000000000.000000转 如果没有电子投票， 删除二维码并控制# ∆≈ 您可以在线投票或通过电话投票，而不是邮寄此卡。 在线 转到www.envisionreports.com/amrb或 扫描二维码-登录详细信息位于下面的阴影栏中。 节省纸张、时间和金钱美国领土和加拿大 以电子方式提交的选票必须 在2021年7月28日东部时间凌晨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.