Form 4 Filing by Huang Jack Jiajia

Huang Jack Jiajia, Chief Executive Officer and 10% owner of 51Talk Online Education Group, reported several transactions between May 11 and May 18, 2026. On May 18, 2026, 137,500 Class A Ordinary Shares were acquired through a Rule 10b5-1 trading plan, with a transaction value of $0. This transaction was part of a broader acquisition of 137,500 Class A Ordinary Shares held indirectly through Dasheng Global Limited. Additionally, 137,500 Restricted Share Units (RSUs) vested on the same date, which were initially granted on February 18, 2025, with 962,500 RSUs remaining subject to future vesting. Between May 11 and May 14, 2026, Mr. Huang acquired a total of 84,180 Class A Ordinary Shares through HH Talent Limited, pursuant to a Rule 10b5-1 trading plan. These acquisitions occurred at weighted average prices ranging from $25.22 to $26.42 per share. The filing also notes indirect holdings through spouse and other entities, with specific details provided in footnotes regarding ownership structures and share representations.