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Exhibit 16.1

[PricewaterhouseCoopers LLP letterhead]

April 16, 2025

    

Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Commissioners:

We have read the statements made by Compass Pathways plc (copy attached), which we understand will be filed with the Securities and Exchange Commission, pursuant to Item 4.01 of Form 8-K of Compass Pathways plc dated April 16, 2025. We agree with the statements concerning our Firm contained therein.

Very truly yours,

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Reading, United Kingdom

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