X0609 4 2026-03-20 0002081043 AtaiBeckley Inc. ATAI 0002049601 Craig Kevin James false C/O ATAI LIFE SCIENCES US, INC. C/O INDUSTRIOUS NYC, 250 WEST 34TH ST. NEW YORK NY 10119 true Chief Medical Officer true Common Stock 2026-03-20 4 M 0 76224 1.18 A 84661 D Common Stock 2026-03-20 4 M 0 23776 1.5 A 108437 D Common Stock 2026-03-20 4 S 0 100000 3.55 D 8437 D Stock Option 1.18 2026-03-20 4 M 0 76224 0 D 2033-03-14 Common Stock 76224 38136 D Stock Option 1.5 2026-03-20 4 M 0 23776 0 D 2035-03-03 Common Stock 23776 734139 D The option exercises and sale reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 19, 2025. The stock option vested as to 25% of the underlying shares on March 14, 2024, with the remaining underlying shares vesting in 36 substantially equal monthly installments thereafter. The stock option vested as to 25% of the underlying shares on January 1, 2026, with the remaining shares vesting in 36 substantially equal monthly installments thereafter. The price reported is a weighted average price. The securities were sold in multiple transactions at per share prices ranging from $3.52 to $3.60. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. /s/ Ryan Barrett, as attorney in fact 2026-03-24