Save your place

Sign in to WhoBought

Please try again later.

Jim Simons's Catalyst Biosciences, Inc. (CBIO) position

Yes: as of Q1 2026, Jim Simons holds 24K shares of CBIO worth an amount we cannot price (0.0% of the disclosed portfolio). Last quarter the position was reduced by 48.0%. First disclosed Q2 2021.
View full portfolio →
Current value
an amount we cannot price
Shares held
24K
% 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.

CBIO price vs Simons's position

Dates
$14.6$14.8$15$15.2← Earlier —7 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 Reduced −22K −48.0% 24K May 14, 2026
Q4 2025 Added +20K +73.6% 47K Feb 12, 2026
Q3 2025 New +27K 27K Nov 13, 2025
Q2 2024 New +14K 14K Aug 9, 2024
Q4 2023 Reduced −574K −97.1% 17K Feb 13, 2024
Q3 2023 Reduced −184K −23.7% 591K Nov 14, 2023
Q2 2023 Reduced −102K −11.6% 774K Aug 11, 2023
Q1 2023 Reduced −311K −26.2% 876K May 12, 2023
Q4 2022 Added +86K +7.8% 1.2M Feb 13, 2023
Q3 2022 Added +304K +38.2% 1.1M Nov 14, 2022
Q2 2022 Reduced −373K −31.9% 797K Aug 12, 2022
Q1 2022 Reduced −602K −34.0% 1.2M May 13, 2022
Q4 2021 Added +1.7M +4,353.7% 1.8M Feb 11, 2022
Q3 2021 Reduced −408K −91.1% 40K Nov 12, 2021
Q2 2021 New +448K 448K Aug 13, 2021
Data through Q1 2026 · filed May 14, 2026
15 grouped rows from 15 quarters

More Simons positions

Common questions

Does Jim Simons own CBIO?

Yes. As of Q1 2026, Jim Simons disclosed 24K shares of CBIO, 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 CBIO?

Jim Simons first disclosed a CBIO position in Q2 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 Jim Simons sell CBIO?

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

How many shares of CBIO does Jim Simons own?

Jim Simons disclosed 24K shares of CBIO 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 CBIO?

Jim Simons began building the CBIO 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.