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Ken Griffin's SELLAS Life Sciences Group, Inc. (SLS) position

Yes: as of Q1 2026, Ken Griffin holds 65K shares of SLS 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
65K
% 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.

SLS price vs Griffin's position

Dates
$11$11.5$12$12.5$13$13.5← Earlier —9 purchases, 6 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 New +65K 65K May 15, 2026
Q3 2025 Added +109K +128.7% 194K Nov 14, 2025
Q2 2025 Reduced −265K −75.7% 85K Aug 14, 2025
Q1 2025 Reduced −136K −28.0% 350K May 15, 2025
Q4 2024 Added +438K +925.6% 485K Feb 14, 2025
Q3 2024 New +47K 47K Nov 14, 2024
Q1 2024 New +20K 20K May 15, 2024
Q2 2023 New +3K 3K Aug 14, 2023
Q4 2022 Reduced −104K −96.9% 3K Feb 14, 2023
Q3 2022 Added +70K +185.8% 108K Nov 14, 2022
Q2 2022 Added +24K +181.5% 38K Aug 15, 2022
Q1 2022 Reduced −27K −67.3% 13K May 16, 2022
Q4 2021 Reduced −2K −3.9% 41K Feb 14, 2022
Q3 2021 Added +28K +186.5% 42K Nov 15, 2021
Q2 2021 Reduced −10K −39.2% 15K Aug 16, 2021
Q1 2021 First covered 24K May 21, 2021
Data through Q1 2026 · filed May 15, 2026
16 grouped rows from 16 quarters

More Griffin positions

Common questions

Does Ken Griffin own SLS?

Yes. As of Q1 2026, Ken Griffin disclosed 65K shares of SLS, 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 SLS?

Ken Griffin held SLS 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 SLS?

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

How many shares of SLS does Ken Griffin own?

Ken Griffin disclosed 65K shares of SLS 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 SLS?

Ken Griffin began building the SLS 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.