ATAI

The option exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on April 7, 2026.

The stock option is fully vested.

The option exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on April 7, 2026.

The price reported is a weighted average price. The securities were sold in multiple transactions at per share prices ranging from $4.90 to $5.08. 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.

The option exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on April 7, 2026.

The stock option is fully vested.

The option exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on April 7, 2026.

The option exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on April 7, 2026.

The stock option vested (subject to continued service through each such vesting date) as to 25% of the total number of shares underlying the option on December 3, 2025 and as to the remaining 75% of the total number of shares in 36 substantially equal monthly installments thereafter.

The option exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 27, 2026.

The option exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 27, 2026.

The stock option vested (subject to continued service through each such vesting date) as to 25% of the total number of shares underlying the option on December 3, 2025 and as to the remaining 75% of the total number of shares in 36 substantially equal monthly installments thereafter.

The option exercises and sales 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 option exercises and sales 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 option exercises and sales 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 option exercises and sales 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 January 1, 2026, with the remaining underlying 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 $4.50 to $4.54. 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

The stock option shall vest on the earlier of the day before AtaiBeckley Inc.'s next annual meeting or June 4, 2027, subject to continued service on AtaiBeckley Inc.'s board of directors through the applicable vesting date.

The stock option shall vest on the earlier of the day before AtaiBeckley Inc.'s next annual meeting or June 4, 2027, subject to continued service on AtaiBeckley Inc.'s board of directors through the applicable vesting date.

The stock option shall vest on the earlier of the day before AtaiBeckley Inc.'s next annual meeting or June 4, 2027, subject to continued service on AtaiBeckley Inc.'s board of directors through the applicable vesting date.

The stock option shall vest on the earlier of the day before AtaiBeckley Inc.'s next annual meeting or June 4, 2027, subject to continued service on AtaiBeckley Inc.'s board of directors through the applicable vesting date.

The stock option shall vest on the earlier of the day before AtaiBeckley Inc.'s next annual meeting or June 4, 2027, subject to continued service on AtaiBeckley Inc.'s board of directors through the applicable vesting date.

The stock option shall vest on the earlier of the day before AtaiBeckley Inc.'s next annual meeting or June 4, 2027, subject to continued service on AtaiBeckley Inc.'s board of directors through the applicable vesting date.

The stock option shall vest on the earlier of the day before AtaiBeckley Inc.'s next annual meeting or June 4, 2027, subject to continued service on AtaiBeckley Inc.'s board of directors through the applicable vesting date.

The stock option shall vest on the earlier of the day before AtaiBeckley Inc.'s next annual meeting or June 4, 2027, subject to continued service on AtaiBeckley Inc.'s board of directors through the applicable vesting date.

The stock option shall vest on the earlier of the day before AtaiBeckley Inc.'s next annual meeting or June 4, 2027, subject to continued service on AtaiBeckley Inc.'s board of directors through the applicable vesting date.

The option exercises and sales 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 option exercises and sales 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 January 1, 2025, with the remaining underlying shares vesting in 36 substantially equal monthly installments thereafter.

The option exercises and sales 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 option exercises and sales 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 January 1, 2026, with the remaining underlying shares vesting in 36 substantially equal monthly installments thereafter.

The option exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 19, 2025.

Represents shares acquired upon exercise of options and held by the Reporting Person.

Represents shares acquired upon exercise of options and held by the Reporting Person.

The stock option is fully vested and exercisable.

The stock option vested with respect to 25% of the shares on January 5, 2025, and will vest with respect to the remaining shares in 36 monthly installments thereafter.

Represents shares acquired upon exercise of options and held by the Reporting Person.

The stock option is fully vested and exercisable.

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.

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 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 January 1, 2026, with the remaining shares vesting in 36 substantially equal monthly installments thereafter.

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 vests (subject to continued service through each such vesting date) as to 25% of the total number of shares underlying the option on March 11, 2027 and as to the remaining 75% of the total number of shares in 36 substantially equal monthly installments thereafter.

The restricted stock units vest (subject to continued service through each such vesting date) in four equal annual instalments on each of the first four anniversaries of March 11, 2026.

The stock option vests (subject to continued service through each such vesting date) as to 25% of the total number of shares underlying the option on January 1, 2027 and as to the remaining 75% of the total number of shares in 36 substantially equal monthly installments thereafter.

Each restricted stock unit vests (subject to continued service through each such vesting date) as to 25% of the total number of shares underlying such award on January 1, 2027 and as to the remaining 75% of the total number of shares on each of the first three anniversaries of January 1, 2027.

Each restricted stock unit vests (subject to continued service through each such vesting date) as to 25% of the total number of shares underlying such award on January 1, 2027 and as to the remaining 75% of the total number of shares on each of the first three anniversaries of January 1, 2027.

Each restricted stock unit vests (subject to continued service through each such vesting date) as to 25% of the total number of shares underlying such award on January 1, 2027 and as to the remaining 75% of the total number of shares on each of the first three anniversaries of January 1, 2027.

The stock option vests (subject to continued service through each such vesting date) as to 25% of the total number of shares underlying the option on January 1, 2027 and as to the remaining 75% of the total number of shares in 36 substantially equal monthly installments thereafter.

The stock option vests (subject to continued service through each such vesting date) as to 25% of the total number of shares underlying the option on January 1, 2027 and as to the remaining 75% of the total number of shares in 36 substantially equal monthly installments thereafter.

Each restricted stock unit vests (subject to continued service through each such vesting date) as to 25% of the total number of shares underlying such award on January 1, 2027 and as to the remaining 75% of the total number of shares on each of the first three anniversaries of January 1, 2027.

The stock option vests (subject to continued service through each such vesting date) as to 25% of the total number of shares underlying the option on January 1, 2027 and as to the remaining 75% of the total number of shares in 36 substantially equal monthly installments thereafter.

The stock option vests (subject to continued service through each such vesting date) as to 25% of the total number of shares underlying the option on January 1, 2027 and as to the remaining 75% of the total number of shares in 36 substantially equal monthly installments thereafter.