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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13D/A 0001193125-21-171001 0001840904 XXXXXXXX LIVE 4 Ordinary Shares 03/05/2025 false 0001816590 20451W101 COMPASS Pathways plc 33 Broadwick Street London X0 W1F 0DQ Ryan Barrett 49 (0) 89 2153 9035 ATAI Life Sciences AG Wallstrasse 16 Berlin 2M 10179 0001840904 ATAI Life Sciences N.V. WC P7 0 6905774 0 6905774 6905774 N 7.5 CO Y ATAI Life Sciences AG WC 2M 0 6905774 0 6905774 6905774 N 7.5 CO Ordinary Shares COMPASS Pathways plc 33 Broadwick Street London X0 W1F 0DQ This Amendment No. 4 to Schedule 13D amends and supplements the Schedule 13D originally filed with the United States Securities and Exchange Commission (the "SEC") on May 24, 2021 (as amended, the "Schedule 13D") relates to the ordinary shares, nominal value GBP 0.008 per ordinary share (the "Ordinary Shares"), of COMPASS Pathways plc, a public limited company under the laws of England and Wales (the "Issuer"). Capitalized terms used herein without definition shall have the meaning set forth in the Schedule 13D. CUSIP number 20451W101 has been assigned to the American Depositary Shares ("ADSs") of the Issuer, which are quoted on The Nasdaq Stock Market under the symbol "CMPS." Each ADS represents one Ordinary Share of the Issuer. No CUSIP number has been assigned to the Ordinary Shares of the Issuer. Item 5 of the Schedule 13D is amended and restated in its entirety by inserting the following information: The information contained on the cover pages is incorporated by reference to this Item 5. As of the date of this Schedule 13D, ATAI AG may be deemed to beneficially own 6,905,774 Ordinary Shares, representing approximately 7.5% of the 92,673,132 Ordinary Shares outstanding as of February 24, 2025, as disclosed in the Issuer's Annual Report on Form 10-K filed by the Issuer on February 27, 2025. The information contained on the cover pages is incorporated by reference to this Item 5. ATAI AG is a wholly owned subsidiary of ATAI N.V., and as a result, ATAI N.V. may be deemed to share beneficial ownership of the Ordinary Shares held by ATAI AG. During the past 60 days, neither the Reporting Persons nor any Related Person has effected any transactions in the Ordinary Shares. None. Not applicable. ATAI Life Sciences N.V. /s/ Anne Johnson Anne Johnson, Chief Financial Officer 03/05/2025 ATAI Life Sciences AG /s/ Anne Johnson Anne Johnson, Chief Financial Officer 03/05/2025