Compass Pathways stock plunges after Phase 3 trial results

Published 23/06/2025, 14:14
© Reuters.

Investing.com -- Compass Pathways Plc (NASDAQ:CMPS) stock plunged 35.2% after the biotechnology company announced results from its Phase 3 COMP005 trial for COMP360, its synthetic psilocybin formulation for treatment-resistant depression (TRD).

Despite meeting its primary endpoint with a statistically significant reduction in depression symptoms compared to placebo (p<0.001), investors appeared disappointed by the modest clinical benefit. The trial showed a -3.6 point difference in Montgomery-Åsberg Depression Rating Scale (MADRS) scores at week 6 between patients receiving a single 25mg dose of COMP360 and those receiving placebo.

The Phase 3 COMP005 trial, which dosed 258 participants across 32 U.S. sites, represents the first study of synthetic psilocybin and the first classic psychedelic to report Phase 3 efficacy data for depression treatment. According to the Data Safety Monitoring Board, safety findings were consistent with previous studies of COMP360 with no new or unexpected safety concerns.

Kabir Nath, CEO of Compass Pathways, characterized the results as showing "innovative potential of psilocybin treatment in mental health care," while noting the company anticipates further insights from the full dataset and from the ongoing COMP006 trial, which will explore two fixed doses.

The company plans to discuss these preliminary data with the FDA, which has not yet reviewed the results. Compass Pathways continues to position COMP360 as a potential option for patients who have failed multiple currently approved treatments for depression.

This article was generated with the support of AI and reviewed by an editor. For more information see our T&C.

Latest comments

Risk Disclosure: Trading in financial instruments and/or cryptocurrencies involves high risks including the risk of losing some, or all, of your investment amount, and may not be suitable for all investors. Prices of cryptocurrencies are extremely volatile and may be affected by external factors such as financial, regulatory or political events. Trading on margin increases the financial risks.
Before deciding to trade in financial instrument or cryptocurrencies you should be fully informed of the risks and costs associated with trading the financial markets, carefully consider your investment objectives, level of experience, and risk appetite, and seek professional advice where needed.
Fusion Media would like to remind you that the data contained in this website is not necessarily real-time nor accurate. The data and prices on the website are not necessarily provided by any market or exchange, but may be provided by market makers, and so prices may not be accurate and may differ from the actual price at any given market, meaning prices are indicative and not appropriate for trading purposes. Fusion Media and any provider of the data contained in this website will not accept liability for any loss or damage as a result of your trading, or your reliance on the information contained within this website.
It is prohibited to use, store, reproduce, display, modify, transmit or distribute the data contained in this website without the explicit prior written permission of Fusion Media and/or the data provider. All intellectual property rights are reserved by the providers and/or the exchange providing the data contained in this website.
Fusion Media may be compensated by the advertisers that appear on the website, based on your interaction with the advertisements or advertisers
© 2007-2025 - Fusion Media Limited. All Rights Reserved.