美國

美國證券交易委員會

華盛頓特區20549

附表14A資料

根據第(Br)條第(Br)14(A)節發出的徵求同意聲明

1934年證券交易法

選中相應的框：

☐ 初步代理聲明

☐ 保密，僅供委員會使用(規則14a-6(E)(2)允許)

☐明確的 代理聲明

權威的附加材料

☐ 根據§240.14a-12徵集材料

中國社科院信息系統公司

(章程中規定的註冊人姓名)

(提交委託書的人的姓名，如果不是註冊人的話)

支付申請費(勾選適當的方框)：

不需要 費用。

之前使用初步材料支付的☐費用 ：

在線 訪問www.investorvote.com/cass或掃描 二維碼登錄詳細信息位於下面的陰影欄中。以電子方式提交的投票必須在中部時間2023年4月17日晚上11：59之前收到。 股東大會通知 有關CASS信息系統代理材料可用性的重要通知，Inc.將於2023年4月18日召開的股東大會 根據美國證券交易委員會的規定，您將收到年度股東大會的代理材料可在互聯網上獲得的通知。按照下面的説明查看材料並在線投票或索取副本。年度會議的表決項目和地點在背面。您的投票很重要！ 此通信僅概述了Internet上提供給您的更完整的代理材料。我們鼓勵您在投票前訪問和查看代理材料中包含的所有重要信息。股東的委託書和年度報告可通過at： www.investorvote.com/CASS Easy在線訪問-查看您的委託書材料並進行投票。 第1步：轉至www.investorvote.com/cass 第2步：單擊右側的圖標查看會議材料。 第3步：返回Investorvote.com窗口並按照屏幕上的説明登錄。第4步：按照每個屏幕上的指示為您的交付首選項進行選擇。 第5步：投票您的股票。 當您上網時，您還可以通過同意接收未來材料的電子交付來幫助環境。 如果您想要接收代理材料的副本，請獲取代理材料的副本, 您必須申請一個。你索要複印件是不收費的。請於2023年4月4日或之前在背面按説明提出要求，以便及時發貨。

03RMKC 2 N O T + Shareholder Meeting Notice Cass Information Systems, Inc.’s Annual Meeting of Shareholders will be held on Tuesday, April 18, 2023 at The Bogey Club located at 9266 Clayton Road, St. Louis, Missouri 63124 at 8:30 A.M. local time. Proposals to be voted on at the meeting are listed below along with the Board of Directors’ recommendations. The Board of Directors recommends a vote FOR all the nominees listed, FOR Proposals 2, 4 and 5, and for 1 YEAR on Proposal 3: 1. Election of Directors: 01 - Eric H. Brunngraber 02 - Benjamin F. Edwards 03 - Ann W. Marr 04 - Martin H. Resch 05 - Joseph D. Rupp 2. To approve the advisory resolution on executive compensation. 3. To recommend by advisory vote the frequency of executive compensation advisory votes. 4. To approve the 2023 Omnibus Stock and Performance Compensation Plan. 5. To ratify the appointment of KPMG LLP as the independent registered public accounting firm for 2023. PLEASE NOTE – YOU CANNOT VOTE BY RETURNING THIS NOTICE. To vote your shares you must go online or request a paper copy of the proxy materials to receive a proxy card. If you wish to attend and vote at the meeting, please bring this notice with you. Directions to the location of the meeting are included with the proxy materials. Cass Information Systems, Inc. 2023 Annual Meeting Here’s how to order a copy of the proxy materials and select delivery preferences: Current and future delivery requests can be submitted using the options below. If you request an email copy, you will receive an email with a link to the current meeting materials. PLEASE NOTE: You must use the number in the shaded bar on the reverse side when requesting a copy of the proxy materials. — Internet – Go to www.investorvote.com/CASS — Phone – Call us free of charge at 1-866-641-4276. — Email – Send an email to investorvote@computershare.com with “Proxy Materials Cass Information Systems, Inc.” in the subject line. Include your full name and address, plus the number located in the shaded bar on the reverse side, and state that you want a paper copy of the meeting materials. To facilitate timely delivery, requests for a paper copy of proxy materials must be received by April 4, 2023.