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Ken Griffin's Marine Products Corporation (MPX) position

Not anymore: Ken Griffin fully exited MPX in Q4 2025. The position peaked at an amount we cannot price in Q3 2021.
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Value at exit
an amount we cannot price
Shares at exit
30K
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.

MPX price vs Griffin's position

Dates
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
Q4 2025 Exited −30K −100.0% 0 Feb 17, 2026
Q3 2025 New +30K 30K Nov 14, 2025
Q4 2024 Reduced −1K −4.1% 29K Feb 14, 2025
Q3 2024 Added +29K +3,845.8% 30K Nov 14, 2024
Q2 2024 Reduced −25K −97.0% 758 Aug 14, 2024
Q1 2024 Reduced −14K −34.8% 26K May 15, 2024
Q4 2023 Added +19K +92.8% 39K Feb 14, 2024
Q3 2023 Reduced −9K −30.1% 20K Nov 14, 2023
Q2 2023 Added +10K +53.6% 29K Aug 14, 2023
Q1 2023 Added +13K +196.2% 19K May 15, 2023
Q4 2022 New +6K 6K Feb 14, 2023
Q2 2022 New +13K 13K Aug 15, 2022
Q4 2021 Added +9K +74.9% 22K Feb 14, 2022
Q3 2021 New +13K 13K Nov 15, 2021
Data through Q4 2025 · filed Feb 17, 2026
14 grouped rows from 14 quarters

More Griffin positions

Common questions

Does Ken Griffin own MPX?

Not currently. Ken Griffin fully exited MPX in Q4 2025, and the complete history is above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Ken Griffin buy MPX?

Ken Griffin first disclosed a MPX position in Q3 2021; every quarterly buy and sell since is in the table above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Ken Griffin sell MPX?

Yes. Ken Griffin reduced and then fully exited MPX by Q4 2025; the reductions are in the table above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of MPX does Ken Griffin own?

None as of the latest filing: Ken Griffin has exited MPX. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Ken Griffin pay for MPX?

Ken Griffin began building the MPX 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.