Form 8-K Summary: Atai Beckley N.V.

• Event Date: November 5, 2025
• Item: Item 8.01 - Other Events.

The Company filed a prospectus supplement covering the resale of up to 5,316,238 common shares of ATAI.

These shares are being registered to satisfy registration rights granted to selling securityholders in connection with the Company’s acquisition of the remaining shares of Beckley Psytech Limited.

• Investor Relevance: A significant block of shares (approx. 5.3M) is now eligible for resale on the market, which could introduce potential selling pressure.
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