[Form 4] Atai Beckley N.V. Insider Trading Activity

Rhea-AI Filing Summary

Atai Beckley N.V. (ATAI) reported a change to a director’s stock option. A previously granted option to purchase 40,400 common shares at an exercise price of $4.48 per share was amended on November 25, 2025 in connection with a consulting agreement.

Following the amendment, the reporting person now holds an option covering 10,000 common shares at the same exercise price of $4.48. Instead of vesting in 12 monthly installments beginning December 5, 2025, the option will vest in full on December 31, 2025, if the reporting person continues to provide service through that date.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Feilding-Mellen Cosmo

Role Director

Type	Security	Shares	Price	Value
Disposition	Stock Option	40,400	$0.00	$0.00
Grant/Award	Stock Option	10,000	$0.00	$0.00

Holdings After Transaction: Stock Option — 10,000 contracts (Direct)

Footnotes (1)

1. F1. On November 5, 2025, the Reporting Person received a stock option award ("Option"), vesting in 12 substantially equal monthly installments, beginning on December 5, 2025, as reported on the Form 4 filed by the Reporting Person on November 6, 2025. On November 25, 2025 the Reporting Person entered into a consulting agreement with the Company pursuant to which the Option was amended to reduce the number of ordinary shares subject to the Option and to provide that the Option shall vest in full on December 31, 2025, subject to the Reporting Person's continued service on such date.

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Accepted by SEC EDGAR 11/26/2025 - 05:00 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Feilding-Mellen Cosmo

(Last) (First) (Middle)

C/O ATAI BECKLEY N.V.

PROF. J.H. BAVINCKLAAN 7

(Street)

AMSTERDAM P7 1183AT

(City) (State) (Zip)

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)

3. Date of Earliest Transaction (Month/Day/Year)
11/25/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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	$4.48	11/25/2025		D(1)			40,400	(1)	11/05/2035	Common Shares	40,400	$0	0	D
Stock Option	$4.48	11/25/2025		A(1)		10,000		(1)	11/05/2035	Common Shares	10,000	$0	10,000	D

Explanation of Responses:

1. On November 5, 2025, the Reporting Person received a stock option award ("Option"), vesting in 12 substantially equal monthly installments, beginning on December 5, 2025, as reported on the Form 4 filed by the Reporting Person on November 6, 2025. On November 25, 2025 the Reporting Person entered into a consulting agreement with the Company pursuant to which the Option was amended to reduce the number of ordinary shares subject to the Option and to provide that the Option shall vest in full on December 31, 2025, subject to the Reporting Person's continued service on such date.

	/s/ Ryan Barrett, as attorney in fact	11/26/2025
	** Signature of Reporting Person	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).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.