Sec Form 4 Filing - HERSHBERG ROBERT @ Atai Beckley N.V. - 2025-11-05

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 HERSHBERG ROBERT 2. Issuer Name and Ticker or Trading Symbol Atai Beckley N.V. [ ATAI] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O ATAI BECKLEY N.V., PROF. J.H. BAVINCKLAAN 7 3. Date of Earliest Transaction (MM/DD/YY) 11/05/2025 (Street) AMSTERDAM, P71183AT 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

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 Stock Option $ 1.35 11/05/2025 A 456,011 ( 1 ) ( 2 ) 07/05/2030 Common Shares 456,011 $ 0 456,011 D Stock Option $ 1.35 11/05/2025 A 97,716 ( 1 ) ( 2 ) 06/07/2030 Common Shares 97,716 $ 0 97,716 D Stock Option $ 1.35 11/05/2025 A 62,394 ( 1 ) ( 2 ) 10/20/2032 Common Shares 62,394 $ 0 62,394 D Stock Option $ 4.48 11/05/2025 A 103,000 ( 3 ) 11/05/2035 Common Shares 103,000 $ 0 103,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other HERSHBERG ROBERT C/O ATAI BECKLEY N.V. PROF. J.H. BAVINCKLAAN 7 AMSTERDAM, P71183AT X Signatures /s/ Ryan Barrett, as attorney in fact 11/06/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On November 5, 2025, the Issuer completed its previously announced acquisition of the entire issued share capital of Beckley Psytech Limited ("Beckley Psytech") not already owned by the Issuer (the "Acquisition") from the shareholders of Beckley Psytech, pursuant to that certain Share Purchase Agreement, dated as of June 2, 2025, by and among the parties thereto, as amended (the "Purchase Agreement"). In connection with the Acquisition, the Company acquired all of the issued and outstanding equity interests of Beckley Psytech in exchange for an aggregate of 103,000,066 common shares of the Issuer, issued directly as share consideration or as underlying replacement awards pursuant to the Purchase Agreement. ( 2 )The stock option is fully vested as of the grant date. ( 3 )The stock option shall vest in full on the first anniversary of the grant date.

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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