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Jim Simons's Korro Bio, Inc. (KRRO) position

Yes: as of Q1 2026, Jim Simons holds 136K shares of KRRO worth an amount we cannot price (0.0% of the disclosed portfolio). Last quarter the position was increased by 81.9%. First disclosed Q4 2023.
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Current value
an amount we cannot price
Shares held
136K
% 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.

KRRO price vs Simons's position

Dates
$10$12$14$16← Earlier —4 purchases, 1 sell
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 +61K +81.9% 136K May 14, 2026
Q4 2025 Added +34K +85.4% 75K Feb 12, 2026
Q3 2025 Reduced −5K −11.6% 40K Nov 13, 2025
Q2 2025 New +46K 46K Aug 13, 2025
Q1 2024 Unchanged 10K May 13, 2024
Q4 2023 New +10K 10K Feb 13, 2024
Data through Q1 2026 · filed May 14, 2026
6 grouped rows from 6 quarters

More Simons positions

Common questions

Does Jim Simons own KRRO?

Yes. As of Q1 2026, Jim Simons disclosed 136K shares of KRRO, worth an amount we cannot price. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Jim Simons buy KRRO?

Jim Simons first disclosed a KRRO position in Q4 2023; 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 Jim Simons sell KRRO?

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

How many shares of KRRO does Jim Simons own?

Jim Simons disclosed 136K shares of KRRO as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Jim Simons pay for KRRO?

Jim Simons began building the KRRO 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.