Arco to Provide Supplemental Materials for Extraordinary General Meeting of Shareholders

Arco Platform Limited (Nasdaq: ARCE) (“Arco” or the “Company”), a leading operating system for K-12 schools, previously announced that it has called an extraordinary general meeting of shareholders (the “EGM”), to be held on December 4, 2023 at 9:00 a.m. (Brasilia time), at Rua Augusta 2840, 16^th floor, Consolação, São Paulo — SP, Brazil, to consider and vote on, among other things, the proposal to authorize and approve the previously announced agreement and plan of merger (the “Merger Agreement”), dated as of August 10, 2023, among the Company, Achieve Holdings (“Achieve”) and Achieve Merger Sub, a wholly owned subsidiary of Achieve, the plan of merger required to be filed with the Registrar of Companies of the Cayman Islands (the “Plan of Merger”) and the transactions contemplated thereby, including the merger.

The Company began mailing the notice and proxy statement relating to the EGM (collectively, the “Proxy Statement”) on or about November 10, 2023.

The form of Surviving Company Amended and Restated Memorandum and Articles of Association, which was to serve as Appendix II to the Plan of Merger (attached as Annex A-2 to the Proxy Statement), which is the subject of Proposal No. 2 at the EGM, was inadvertently omitted from the Proxy Statement as mailed to the Company’s shareholders. The Surviving Company Amended and Restated Memorandum and Articles of Association can be accessed in Arco’s website (https://investor.arcoplatform.com/financials/others/) or by clicking here.

Any shareholder of the Company who has any questions concerning Proposal No. 2 or his, her or its vote with respect to Proposal No. 2, or concerning any other matter related to the EGM, should contact the Company’s Investor Relations Department at [e-mail].

Additional Information About the Merger

Additional information regarding the EGM and the Merger Agreement can be found in the transaction statement on Schedule 13E-3 and the definitive proxy statement attached as Exhibit (a)-(1) thereto (the “Schedule 13E-3”), as amended, filed with the U.S. Securities and Exchange Commission (the “SEC”), which can be obtained, along with other filings containing information about the Company, the proposed Merger and related matters, without charge, from the SEC’s website www.sec.gov. Shareholders who have questions or requests for assistance in completing and submitting proxy cards or need additional copies of the definitive proxy statement or the proxy card should contact Innisfree M&A Incorporated, the proxy solicitor, at [phone] (toll-free from the United States and Canada) or [phone] (from other countries).