COMPASS Pathways plc (CMPS) Institutional Ownership

Ownership Summary

Recent 13F filings as of September 2025 show that 154 institutional investors hold a position in COMPASS Pathways plc (NASDAQ:CMPS).

• The percentage of COMPASS Pathways owned by institutions changed from 56.1% in June 2025 to 58.9% in September 2025, marking a slight up trend.
• On a quarter-over-quarter basis, institutional holdings shifted by 21.41%, with a year-over-year an increase of 19.38% in the count of filers.
• Of these 154 institutional investors, 81 increased their holdings in COMPASS Pathways, while 29 of them reduced positions, and 44 investors maintained their exposure.
• Collectively, institutional investors increased their stake in COMPASS Pathways to 56.48Mn shares as of September 2025, a change that is up by 9.96Mn shares quarter on quarter and up 23.82Mn shares year over year.
• RTW INVESTMENTS, LP's holding of 8.71Mn shares as of September 30, 2025 makes it the primary institutional investor in COMPASS Pathways, owning 9.08% of the stock.
• Among the most significant buyers of COMPASS Pathways during September 2025 were Jefferies Financial Group Inc. (1.38Mn), AMERIPRISE FINANCIAL INC (1.21Mn), GMT CAPITAL CORP (1.06Mn), TWO SIGMA INVESTMENTS, LP (960.68K), Eagle Health Investments LP (935.45K).
• Leading sellers of COMPASS Pathways stock in September 2025 included Nantahala Capital Management, LLC (2.45Mn), Deep Track Capital, LP (971.36K), Affinity Asset Advisors, LLC (650.51K), BOOTHBAY FUND MANAGEMENT, LLC (500.00K), BALYASNY ASSET MANAGEMENT L.P. (459.83K).
• The top 10 institutional holders of COMPASS Pathways for the quarter ending September 2025 included RTW INVESTMENTS, LP (8.71Mn), Deep Track Capital, LP (7.86Mn), GMT CAPITAL CORP (2.84Mn), MILLENNIUM MANAGEMENT LLC (2.72Mn), TANG CAPITAL MANAGEMENT LLC (2.20Mn), UBS Group AG (2.14Mn), ARK Investment Management LLC (2.12Mn), Nantahala Capital Management, LLC (1.73Mn), PFM Health Sciences, LP (1.66Mn), Jefferies Financial Group Inc. (1.38Mn).