Sec Form 3 Filing - Chae Yuki @ WEBTOON Entertainment Inc. - 2026-04-10

FORM 3 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 Chae Yuki 2. Issuer Name and Ticker or Trading Symbol WEBTOON Entertainment Inc. [ WBTN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Product Officer (Last) (First) (Middle) 5700 WILSHIRE BLVD., SUITE 220 3. Date of Earliest Transaction (MM/DD/YY) 04/10/2026 (Street) LOS ANGELES, CA90036 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 Common Stock 149,822 D ( 1 )

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 Option $ 11.04 ( 2 ) 11/23/2028 Common Stock 52,740 D Option $ 13.04 ( 2 ) 10/07/2029 Common Stock 12,240 D Option $ 32.3 ( 2 ) 12/26/2030 Common Stock 18,000 D Option $ 20.34 ( 3 ) 11/22/2031 Common Stock 60,000 D Option $ 22.5 ( 4 ) 05/10/2032 Common Stock 14,400 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Chae Yuki 5700 WILSHIRE BLVD., SUITE 220 LOS ANGELES, CA90036 Chief Product Officer Signatures Maximilian Jo, as Attorney-in-Fact for Yuki Chae 04/16/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )A portion of the reported securities represent restricted stock units ("RSUs") which each entitle the reporting person to receive one share of common stock upon vesting. The RSUs vest as follows: (i) 72,177 RSUs vest in two installments of 30,933 RSUs on May 28, 2026 and 41,244 RSUs on May 28, 2027; (ii) 7,297 RSUs vest on March 5, 2027; (iii) 17,848 RSUs vest in three installments of 30% on April 25, 2026, 30% on April 25, 2027 and 40% on April 25, 2028; and (iv) 10,622 RSUs vest in three installments of 30% on May 10, 2026, 30% on May 10, 2027 and 40% on May 10, 2028, subject to continued employment through each such date. ( 2 )All of the shares subject to the option are fully vested and exercisable as of the date hereof. ( 3 )All of the shares subject to the option will vest on November 22, 2026, subject to continued employment through the vesting date. ( 4 )All of the shares subject to the option will vest on May 11, 2027, subject to continued employment through the vesting date.

Remarks: Exhibit 24 - Power of Attorney

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).

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