Sec Form 4 Filing - Huang Jack Jiajia @ 51Talk Online Education Group - 2026-06-23

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Huang Jack Jiajia 2. Issuer Name and Ticker or Trading Symbol 51Talk Online Education Group [ COE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Executive Officer (Last) (First) (Middle) ROOM 2010 - 2011, 20/F, TOWER 1, TIMES SQUARE 3. Date of Earliest Transaction (MM/DD/YY) 06/23/2026 (Street) SINGAPORE068809 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Ordinary Share, par value US$0.0001 ( 1 ) 06/30/2026 M 275,000 A $ 0 42,251,300 I By Dasheng Global Limited ( 2 ) Class A Ordinary Share, par value US$0.0001 ( 1 ) 06/23/2026 P( 3 ) 12,000 A $ 15.63 ( 4 ) 27,308,880 I By HH Talent Limited ( 5 ) Class A Ordinary Share, par value US$0.0001 ( 1 ) 06/23/2026 P( 3 ) 13,620 A $ 15.5 ( 6 ) 27,322,500 I By HH Talent Limited ( 5 ) Class A Ordinary Share, par value US$0.0001 ( 1 ) 06/23/2026 P( 3 ) 72,780 A $ 16.01 ( 7 ) 27,395,280 I By HH Talent Limited ( 5 ) Class A Ordinary Share, par value US$0.0001 ( 1 ) 06/23/2026 P( 3 ) 60,000 A $ 16 27,455,280 I By HH Talent Limited ( 5 ) Class A Ordinary Share, par value US$0.0001 ( 1 ) 06/23/2026 P( 3 ) 60,000 A $ 16 ( 8 ) 27,515,280 I By HH Talent Limited ( 5 ) Class A Ordinary Share, par value US$0.0001 ( 1 ) 06/23/2026 P( 3 ) 30,000 A $ 16 ( 9 ) 27,545,280 I By HH Talent Limited ( 5 ) Class A Ordinary Share, par value US$0.0001 ( 1 ) 06/24/2026 P( 3 ) 3,720 A $ 15.04 ( 10 ) 27,549,000 I By HH Talent Limited ( 5 ) Class A Ordinary Share, par value US$0.0001 ( 1 ) 06/24/2026 P( 3 ) 210,000 A $ 15.46 ( 11 ) 27,759,000 I By HH Talent Limited ( 5 ) Class A Ordinary Share, par value US$0.0001 ( 1 ) 06/24/2026 P( 3 ) 60,000 A $ 14.85 ( 12 ) 27,819,000 I By HH Talent Limited ( 5 ) Class A Ordinary Share, par value US$0.0001 ( 1 ) 06/24/2026 P( 3 ) 58,500 A $ 14.81 ( 13 ) 27,877,500 I By HH Talent Limited ( 5 ) Class A Ordinary Share, par value US$0.0001 ( 1 ) 06/24/2026 P( 3 ) 60,000 A $ 15.19 ( 14 ) 27,937,500 I By HH Talent Limited ( 5 ) Class A Ordinary Share, par value US$0.0001 ( 1 ) 06/24/2026 P( 3 ) 60,000 A $ 15.4 ( 15 ) 27,997,500 I By HH Talent Limited ( 5 ) Class A Ordinary Share, par value US$0.0001 ( 1 ) 06/24/2026 P( 3 ) 60,000 A $ 15.36 ( 16 ) 28,057,500 I By HH Talent Limited ( 5 ) Class A Ordinary Share, par value US$0.0001 ( 1 ) 06/25/2026 P( 3 ) 150,600 A $ 15.76 ( 17 ) 28,208,100 I By HH Talent Limited ( 5 ) Class A Ordinary Share, par value US$0.0001 ( 1 ) 06/26/2026 P( 3 ) 60 A $ 14.85 28,208,160 I By HH Talent Limited ( 5 ) Class A Ordinary Share, par value US$0.0001 ( 1 ) 06/26/2026 P( 3 ) 151,800 A $ 15.61 ( 18 ) 28,359,960 I By HH Talent Limited ( 5 ) Class A Ordinary Share, par value US$0.0001 ( 1 ) 7,297,560 D Class A Ordinary Share, par value US$0.0001 ( 1 ) 432,900 I By Spouse ( 19 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Restricted Share Units (RSUs) ( 20 ) 06/30/2026 M 275,000 ( 21 ) 06/30/2033 Class A Ordinary Share, par value US$0.0001 275,000 $ 0 0 ( 22 ) I By Dasheng Global Limited ( 2 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Huang Jack Jiajia ROOM 2010 - 2011, 20/F, TOWER 1 TIMES SQUARE SINGAPORE068809 X X Chief Executive Officer Signatures /s/ Jack Jiajia Huang 06/30/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The Class A ordinary shares are held in the form of American depositary shares ("ADS"). Each ADS represents sixty Class A ordinary shares. ( 2 )Each of Dasheng Global Limited and Dasheng Online Limited is a British Virgin Islands company. The reporting person is the sole director of Dasheng Global Limited, and Ms. Ting Shu, who is the spouse of the reporting person, is the sole director of Dasheng Online Limited. Each of Dasheng Global Limited and Dasheng Online Limited is wholly beneficially owned by Dasheng International Holdings Limited, which is in turn wholly owned by TB Family Trust, for which TMF (Cayman) Ltd. acts as the trustee (the "Trustee"). S.B. Vanwall Ltd., appointed by the Trustee, is the sole director of Dasheng International Holdings Limited. The settlors of TB Family Trust are reporting person and Ms. Ting Shu. The reporting person, Ms. Ting Shu and their family members are deemed to be beneficial owners of the shares directly held by Dasheng Global Limited and Dasheng Online Limited. ( 3 )These transactions were effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on December 25, 2025. ( 4 )The price reported in Column 4 is a weighted average price of ADS. The reporting person executed a trade order through a broker-dealer which resulted in multiple same-day, same-way open market purchases, with prices ranging from $15.45 to $16.00 per ADS. The reporting person has reported these purchases on an aggregate basis using the weighted average price, rounded to the nearest cent, for the transactions. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of ADS purchased at each price. All of these ADS were purchased by HH Talent Limited (as defined below). ( 5 )HH Talent Limited is a British Virgin Islands company. The reporting person is the sole director of HH Talent Limited. HH Talent Limited is wholly beneficially owned by HH Talent Holdings Limited, which is in turn wholly owned by HH Talent Trust, for which TMF (Cayman) Ltd. acts as the trustee (the "Trustee"). S.B. Vanwall Ltd., appointed by the Trustee, is the sole director of HH Talent Holdings Limited. The settlor of HH Talent Trust is the reporting person. The reporting person is deemed to be the beneficial owner of the shares directly held by HH Talent Limited. ( 6 )The price reported in Column 4 is a weighted average price of ADS. The reporting person executed a trade order through a broker-dealer which resulted in multiple same-day, same-way open market purchases, with prices at $15.50 per ADS. The reporting person has reported these purchases on an aggregate basis using the weighted average price, rounded to the nearest cent, for the transactions. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of ADS purchased at each price. All of these ADS were purchased by HH Talent Limited (as defined above). ( 7 )The price reported in Column 4 is a weighted average price of ADS. The reporting person executed a trade order through a broker-dealer which resulted in multiple same-day, same-way open market purchases, with prices ranging from $14.99 to $16.53 per ADS. The reporting person has reported these purchases on an aggregate basis using the weighted average price, rounded to the nearest cent, for the transactions. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of ADS purchased at each price. All of these ADS were purchased by HH Talent Limited (as defined above). ( 8 )The price reported in Column 4 is a weighted average price of ADS. The reporting person executed a trade order through a broker-dealer which resulted in multiple same-day, same-way open market purchases, with prices at $16.00 per ADS. The reporting person has reported these purchases on an aggregate basis using the weighted average price, rounded to the nearest cent, for the transactions. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of ADS purchased at each price. All of these ADS were purchased by HH Talent Limited (as defined above). ( 9 )The price reported in Column 4 is a weighted average price of ADS. The reporting person executed a trade order through a broker-dealer which resulted in multiple same-day, same-way open market purchases, with prices at $16.00 per ADS. The reporting person has reported these purchases on an aggregate basis using the weighted average price, rounded to the nearest cent, for the transactions. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of ADS purchased at each price. All of these ADS were purchased by HH Talent Limited (as defined above). ( 10 )The price reported in Column 4 is a weighted average price of ADS. The reporting person executed a trade order through a broker-dealer which resulted in multiple same-day, same-way open market purchases, with prices ranging from $14.88 to $15.63 per ADS. The reporting person has reported these purchases on an aggregate basis using the weighted average price, rounded to the nearest cent, for the transactions. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of ADS purchased at each price. All of these ADS were purchased by HH Talent Limited (as defined above). ( 11 )The price reported in Column 4 is a weighted average price of ADS. The reporting person executed a trade order through a broker-dealer which resulted in multiple same-day, same-way open market purchases, with prices ranging from $14.75 to $16.08 per ADS. The reporting person has reported these purchases on an aggregate basis using the weighted average price, rounded to the nearest cent, for the transactions. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of ADS purchased at each price. All of these ADS were purchased by HH Talent Limited (as defined above). ( 12 )The price reported in Column 4 is a weighted average price of ADS. The reporting person executed a trade order through a broker-dealer which resulted in multiple same-day, same-way open market purchases, with prices at $14.85 per ADS. The reporting person has reported these purchases on an aggregate basis using the weighted average price, rounded to the nearest cent, for the transactions. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of ADS purchased at each price. All of these ADS were purchased by HH Talent Limited (as defined above). ( 13 )The price reported in Column 4 is a weighted average price of ADS. The reporting person executed a trade order through a broker-dealer which resulted in multiple same-day, same-way open market purchases, with prices ranging from $14.78 to $14.85 per ADS. The reporting person has reported these purchases on an aggregate basis using the weighted average price, rounded to the nearest cent, for the transactions. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of ADS purchased at each price. All of these ADS were purchased by HH Talent Limited (as defined above). ( 14 )The price reported in Column 4 is a weighted average price of ADS. The reporting person executed a trade order through a broker-dealer which resulted in multiple same-day, same-way open market purchases, with prices ranging from $14.90 to $15.20 per ADS. The reporting person has reported these purchases on an aggregate basis using the weighted average price, rounded to the nearest cent, for the transactions. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of ADS purchased at each price. All of these ADS were purchased by HH Talent Limited (as defined above). ( 15 )The price reported in Column 4 is a weighted average price of ADS. The reporting person executed a trade order through a broker-dealer which resulted in multiple same-day, same-way open market purchases, with prices at $15.40 per ADS. The reporting person has reported these purchases on an aggregate basis using the weighted average price, rounded to the nearest cent, for the transactions. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of ADS purchased at each price. All of these ADS were purchased by HH Talent Limited (as defined above). ( 16 )The price reported in Column 4 is a weighted average price of ADS. The reporting person executed a trade order through a broker-dealer which resulted in multiple same-day, same-way open market purchases, with prices at $15.36 per ADS. The reporting person has reported these purchases on an aggregate basis using the weighted average price, rounded to the nearest cent, for the transactions. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of ADS purchased at each price. All of these ADS were purchased by HH Talent Limited (as defined above). ( 17 )The price reported in Column 4 is a weighted average price of ADS. The reporting person executed a trade order through a broker-dealer which resulted in multiple same-day, same-way open market purchases, with prices ranging from $15.51 to $16.24 per ADS. The reporting person has reported these purchases on an aggregate basis using the weighted average price, rounded to the nearest cent, for the transactions. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of ADS purchased at each price. All of these ADS were purchased by HH Talent Limited (as defined above). ( 18 )The price reported in Column 4 is a weighted average price of ADS. The reporting person executed a trade order through a broker-dealer which resulted in multiple same-day, same-way open market purchases, with prices ranging from $15.15 to $15.90 per ADS. The reporting person has reported these purchases on an aggregate basis using the weighted average price, rounded to the nearest cent, for the transactions. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of ADS purchased at each price. All of these ADS were purchased by HH Talent Limited (as defined above). ( 19 )The reporting person disclaims beneficial ownership of the shares held by his spouse except to the extent of his pecuniary interest, if any, and this report should not be deemed an admission that the reporting person is the beneficial owner of the shares held by his spouse for purposes of Section 16 or for any other purpose. ( 20 )Represents restricted share units ("RSUs") granted to the reporting person pursuant to the issuer's share incentive plans. Each RSU represents the contingent right to receive one (1) Class A ordinary share of the issuer upon vesting. ( 21 )The RSUs vested on June 30, 2026. ( 22 )The reporting person was granted 550, 000 RSUs on June 30, 2023, subject to vesting schedule in two equal installments on March 30, 2026 and June 30, 2026. This Form 4 reports the vesting on June 30, 2026 of the remaining 275,000 RSUs under the grant. Following the vesting reported herein, no Class A ordinary shares remain subject to future vesting under this grant. The RSUs are held indirectly by the reporting person through Dasheng Global Limited.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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