SCHEDULE 13D/A

51TALK ONLINE EDUCATION GROU

Class A ordinary shares, par value $0.0001 per share · CUSIP: 16954L204

Event date: 2025-12-31

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Jack Jiajia HuangReported CIK 0002029760

  Shares: 118,647,664.00 · Class: 33.8%

• Dasheng Global Limited

  Shares: 71,954,121.00 · Class: 20.5%

• Dasheng International Holdings Limited

  Shares: 88,144,984.00 · Class: 25.1%

• TB Family Trust

  Shares: 88,144,984.00 · Class: 25.1%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.