Notice for the 2021 General Shareholders’ Meeting of Stock Exchange Corporation

Subject: Notice for the 2021 General Shareholders’ Meeting of the Company Statutory Basis: The meeting is convened in accordance with the ”Company Act” and the Company’s board resolution made on April 27, 2021. Announcements: I. Time of the Meeting: 2:00 pm on June 17, 2021 (Thursday) II. Venue: VIP Room of International Convention Center, 4F, No. 1, Sec. 5, Xinyi Road, Taipei III. Meeting Agenda: 1. Reports to be reviewed: (1) The 2020 Business Report and Financial Statements. (2) The audit report prepared by the supervisors of the Company. (3) The 2020 employee remuneration distribution. 2. Matters for Ratification: (1) The 2020 Business Report and Financial Statements. (2) The 2020 earnings distribution of the Company (cash dividends of NT$3.4 and stock dividends of NT$1.2 per share). 3. Matters for Discussion: Issuance of new shares from part of the earnings for distribution to shareholders and the corresponding amendment to Article 8 of the Company’s Articles of Association for resolution. 4. Extempore Motion: IV. Book-close date: According to the regulations, transfer of the Company’s shares shall be suspended during the period from May 19, 2021 to June 17, 2021, the closing day of the general shareholders’ meeting. Those who hold the shares of the Company pending transfer registration are urged to complete the registration procedures before 5 pm on May 18, 2021 by either visiting in person or registered mail (postmarked by May 18, 2021, the deadline for transfer registration) to the Company’s stock affair agent: Corporate Trust Operation and Service Department, CTBC Bank Co., Ltd.Address: 5F., No. 83, Sec. 1, Chongqing S. Rd.,Zhongzheng Dist., Taipei City 100, Taiwan (R.O.C.)Tel: +886-2-6636-5566 . V. Acceptance of Shareholders' Proposals: 1. A shareholder holding more than 1% of the outstanding shares of the Company may submit to the Company his/her proposal in writing for discussion at the general shareholders’ meeting. Each proposal shall contain one item only, with a maximum of 300 words (including the subject, description and punctuation marks), and proposals with more than 300 words will not be accepted. The proposing shareholder shall attend the meeting in person or through a proxy and participate in the discussion of the related motion. 2. The Company will accept proposals for the general shareholders’ meeting from May 3, 2021 to May 13, 2021. The shareholder who wishes to submit a proposal shall send the proposal in writing to the Secretariat and Legal Department of the Company at 10 F, No. 7, Sec. 5, Xinyi Road, Xinyi District, Taipei, Tel: + 886-2-8101-3058 before 5:00 pm on May 13, 2021 (the proposal sent by postal mail shall be marked “Proposal for Shareholders’ Meeting” on the envelope and sent by registered mail). 3. The Company will inform the proposing shareholder of the review results of the proposal prior to the date of issuing the notice for the general shareholders’ meeting and will include in the meeting agenda and the meeting notice those proposals meeting the criteria set forth in Article 172-1 of the “Company Act” without issuing a separate announcement. VI. Other Mandatory Announcements: 1. The notice for convening the general shareholders’ meeting will be sent to the shareholders through a separate mail 20 days before the date of the meeting. Shareholders who do not receive the notice by that time are advised to contact the Company’s stock affairs agent: Corporate Trust Operation and Service Department, CTBC Bank

Co., Ltd. (Tel: + 886-2-6636-5566) to have the notice re-issued. 2. Shareholders may exercise their voting rights by electronic means, and the period for exercising the rights is from May 28, 2021 to June 14, 2021. Please log in to the “TDCC Stockvote” webpage and follow the relevant instructions for voting (URL: https://www.stockvote.com.tw). VII. Announcements Concerning the Coronavirus Pandemic (COVID-19): 1. Shareholders who wish to attend the shareholders’ meeting shall bring their own face masks and wear them throughout the meeting, and have their body temperature taken. Shareholders are encouraged to use the “TDCC Stockvote” electronic voting to exercise their voting rights or entrust a proxy in good health to attend the meeting or to entrust the proxy to vote on their behalf. All participants are required to sign in, leave a contact phone number or e-mail address and fill out a consent form for personal data collection in order to facilitate future tracking. 2. If the Company needs to change the meeting venue of the shareholders’ meeting due to the impact of the pandemic, the relevant information will be announced on the “Announcement of Information by Companies in Accordance with the Company Act” of the Department of Commerce, Ministry of Economic Affairs (ipcsa.nat.gov.tw/pap/).