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Jim Simons's Seres Therapeutics, Inc. (MCRB) position

Not anymore: Jim Simons fully exited MCRB in Q1 2024. The position peaked at an amount we cannot price in Q1 2021.
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Value at exit
an amount we cannot price
Shares at exit
817K
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.

MCRB price vs Simons'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
Q1 2024 Exited −817K −100.0% 0 May 13, 2024
Q4 2023 New +817K 817K Feb 13, 2024
Q1 2023 Reduced −153K −27.8% 398K May 12, 2023
Q4 2022 Added +13K +2.3% 552K Feb 13, 2023
Q3 2022 Reduced −338K −38.5% 539K Nov 14, 2022
Q2 2022 Added +397K +82.8% 876K Aug 12, 2022
Q1 2022 Reduced −267K −35.8% 479K May 13, 2022
Q4 2021 New +746K 746K Feb 11, 2022
Q1 2021 First covered 129K May 13, 2021
Data through Q1 2024 · filed May 13, 2024
9 grouped rows from 9 quarters

More Simons positions

Common questions

Does Jim Simons own MCRB?

Not currently. Jim Simons fully exited MCRB in Q1 2024, and the complete history is above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Jim Simons buy MCRB?

Jim Simons held MCRB 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 Jim Simons sell MCRB?

Yes. Jim Simons reduced and then fully exited MCRB by Q1 2024; 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 MCRB does Jim Simons own?

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

What price did Jim Simons pay for MCRB?

Jim Simons began building the MCRB 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.