51Talk dismisses Marcum, appoints Ernst & Young as new auditor.

• 51Talk Online Education Group dismisses Marcum Asia CPAs LLP as auditor • Ernst & Young LLP appointed as new auditor • Dismissal not due to disagreements with Marcum • Ernst & Young to audit 2025 annual consolidated financial statements • No unresolved matters with Marcum • Transition effective September 3, 2025 • 51Talk's core expertise in English education remains unchanged

Singapore, September 2, 2025 — 51Talk Online Education Group ("51Talk" or the "Company") (NYSE American: COE), a global online education platform with a core expertise in English education, has announced the appointment of Ernst & Young LLP as its new independent registered public accounting firm. The company's board of directors and audit committee approved the dismissal of Marcum Asia CPAs LLP ("Marcum") and the engagement of Ernst & Young LLP, effective September 3, 2025 [1].

The transition was not the result of any disagreements or unresolved matters with Marcum, the incumbent auditor. The company is grateful to Marcum for its past services [1]. Ernst & Young LLP will be responsible for auditing the annual consolidated financial statements of the Company and its subsidiaries for the fiscal year ending December 31, 2025 [1].

51Talk Online Education Group's core expertise in English education remains unchanged. The company's mission to make quality education accessible and affordable continues, with its online and mobile education platforms enabling students to take live interactive English lessons on demand [2].

This transition aligns with the company's commitment to maintaining high standards of financial reporting and compliance. The appointment of Ernst & Young LLP, a leading global audit firm, underscores 51Talk's dedication to transparency and accountability [1].

References:
[1] https://www.prnewswire.com/news-releases/51talk-online-education-group-announces-engagement-of-ernst--young-llp-as-the-companys-independent-registered-public-accounting-firm-302545010.html
[2] https://www.marketscreener.com/news/51talk-online-education-group-announces-engagement-of-ernst-young-llp-as-the-company-s-independen-ce7d59dad18ef324