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Ken Griffin's COMPASS Pathways plc (CMPS) position

Yes: as of Q1 2026, Ken Griffin holds 269K shares of CMPS worth an amount we cannot price (0.0% of the disclosed portfolio). Held since at least Q1 2021; that opening coverage snapshot is not counted as a purchase.
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Current value
an amount we cannot price
Shares held
269K
% of portfolio
0.0%
Quarter-end price
No quarter-end price available

Average buy price is hidden here because at least one covered purchase quarter has no usable local mean price.

CMPS price vs Griffin's position

Dates
$11$11.5$12$12.5← Earlier —6 purchases, 12 sells
Average closing price · filing quarter
Price range · filing quarter

Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 Reduced −42K −13.5% 269K May 15, 2026
Q4 2025 New +311K 311K Feb 17, 2026
Q2 2025 Reduced −613K −82.2% 133K Aug 14, 2025
Q1 2025 Reduced −360K −32.6% 745K May 15, 2025
Q4 2024 Reduced −4.3M −79.6% 1.1M Feb 14, 2025
Q3 2024 Added +1.7M +47.6% 5.4M Nov 14, 2024
Q2 2024 Reduced −188K −4.9% 3.7M Aug 14, 2024
Q1 2024 Added +2.3M +146.4% 3.9M May 15, 2024
Q4 2023 Reduced −856 −0.1% 1.6M Feb 14, 2024
Q3 2023 New +1.6M 1.6M Nov 14, 2023
Q1 2023 Reduced −167K −94.9% 9K May 15, 2023
Q4 2022 Added +30K +20.7% 176K Feb 14, 2023
Q3 2022 Reduced −91K −38.4% 146K Nov 14, 2022
Q2 2022 Reduced −13K −5.4% 237K Aug 15, 2022
Q1 2022 Reduced −232K −48.1% 250K May 16, 2022
Q4 2021 Added +422K +695.1% 482K Feb 14, 2022
Q3 2021 Reduced −11K −15.4% 61K Nov 15, 2021
Q2 2021 Reduced −38K −34.5% 72K Aug 16, 2021
Q1 2021 First covered 109K May 21, 2021
Data through Q1 2026 · filed May 15, 2026
19 grouped rows from 19 quarters

More Griffin positions

Common questions

Does Ken Griffin own CMPS?

Yes. As of Q1 2026, Ken Griffin disclosed 269K shares of CMPS, worth an amount we cannot price. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Ken Griffin buy CMPS?

Ken Griffin held CMPS since at least Q1 2021, when this filing coverage begins; the opening snapshot is not a disclosed purchase. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Ken Griffin sell CMPS?

The quarter-by-quarter table above shows each sale and reduction Ken Griffin disclosed in CMPS. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of CMPS does Ken Griffin own?

Ken Griffin disclosed 269K shares of CMPS as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Ken Griffin pay for CMPS?

Ken Griffin began building the CMPS position before our 13F history starts, so an exact average buy price cannot be estimated without understating it. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.