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Jim Simons's Cytek Biosciences, Inc. (CTKB) position

Yes: as of Q1 2026, Jim Simons holds 677K shares of CTKB worth an amount we cannot price (0.0% of the disclosed portfolio). Last quarter the position was increased by 0.3%. First disclosed Q4 2021.
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Current value
an amount we cannot price
Shares held
677K
% 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.

CTKB price vs Simons's position

Dates
$4.55$4.6$4.65← Earlier —10 purchases, 5 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 Added +2K +0.3% 677K May 14, 2026
Q4 2025 Reduced −121K −15.2% 675K Feb 12, 2026
Q3 2025 Reduced −268K −25.2% 796K Nov 13, 2025
Q2 2025 Added +376K +54.6% 1.1M Aug 13, 2025
Q1 2025 Added +225K +48.6% 688K May 14, 2025
Q4 2024 Added +251K +118.6% 463K Feb 13, 2025
Q3 2024 Reduced −22K −9.5% 212K Nov 13, 2024
Q2 2024 New +234K 234K Aug 9, 2024
Q3 2023 New +297K 297K Nov 14, 2023
Q1 2023 Reduced −38K −9.8% 354K May 12, 2023
Q4 2022 Added +180K +84.9% 392K Feb 13, 2023
Q3 2022 Added +49K +30.1% 212K Nov 14, 2022
Q2 2022 Added +109K +200.0% 163K Aug 12, 2022
Q1 2022 Reduced −55K −50.2% 54K May 13, 2022
Q4 2021 New +109K 109K Feb 11, 2022
Data through Q1 2026 · filed May 14, 2026
15 grouped rows from 15 quarters

More Simons positions

Common questions

Does Jim Simons own CTKB?

Yes. As of Q1 2026, Jim Simons disclosed 677K shares of CTKB, 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 CTKB?

Jim Simons first disclosed a CTKB position in Q4 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 CTKB?

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

How many shares of CTKB does Jim Simons own?

Jim Simons disclosed 677K shares of CTKB 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 CTKB?

Jim Simons began building the CTKB 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.