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Ken Griffin's Xenon Pharmaceuticals Inc. (XENE) position

Yes: as of Q1 2026, Ken Griffin holds 2.7M shares of XENE worth an amount we cannot price (0.1% 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
2.7M
% of portfolio
0.1%
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.

XENE price vs Griffin's position

Dates
$60$65$70← Earlier —12 purchases, 8 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 Added +1.3M +100.8% 2.7M May 15, 2026
Q4 2025 Added +362K +37.8% 1.3M Feb 17, 2026
Q3 2025 Added +839K +698.9% 959K Nov 14, 2025
Q2 2025 Reduced −567K −82.5% 120K Aug 14, 2025
Q1 2025 Added +360K +109.9% 687K May 15, 2025
Q4 2024 Reduced −395K −54.7% 327K Feb 14, 2025
Q3 2024 Reduced −46K −6.0% 723K Nov 14, 2024
Q2 2024 Reduced −518K −40.3% 769K Aug 14, 2024
Q1 2024 Added +20K +1.6% 1.3M May 15, 2024
Q4 2023 Added +543K +75.1% 1.3M Feb 14, 2024
Q3 2023 Added +223K +44.4% 724K Nov 14, 2023
Q2 2023 Reduced −370K −42.5% 501K Aug 14, 2023
Q1 2023 Reduced −293K −25.2% 871K May 15, 2023
Q4 2022 Added +22K +2.0% 1.2M Feb 14, 2023
Q3 2022 Reduced −506K −30.7% 1.1M Nov 14, 2022
Q2 2022 Added +207K +14.4% 1.6M Aug 15, 2022
Q1 2022 Added +153K +11.9% 1.4M May 16, 2022
Q4 2021 Added +447K +53.1% 1.3M Feb 14, 2022
Q3 2021 Reduced −202K −19.4% 841K Nov 15, 2021
Q2 2021 Added +821K +368.9% 1.0M Aug 16, 2021
Q1 2021 First covered 223K May 21, 2021
Data through Q1 2026 · filed May 15, 2026
21 grouped rows from 21 quarters

More Griffin positions

Common questions

Does Ken Griffin own XENE?

Yes. As of Q1 2026, Ken Griffin disclosed 2.7M shares of XENE, 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 XENE?

Ken Griffin held XENE 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 XENE?

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

How many shares of XENE does Ken Griffin own?

Ken Griffin disclosed 2.7M shares of XENE 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 XENE?

Ken Griffin began building the XENE 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.