Cytek Biosciences, Inc. Insider Trading Activity
Every SEC Form 4 insider transaction reported for Cytek Biosciences, Inc. (CTKB), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are CTKB insiders buying or selling?
Cytek Biosciences, Inc. insiders reported no open-market purchases or sales in the last 12 months. Since July 2021, Trabud has recorded 80 Form 4 filings for CTKB: 14 buys ($100.5M) and 66 sells ($10.6M).
Source: SEC EDGAR Form 4
Key Statistics (July 2021 – Jun 3, 2025)
Total Form 4 filings
80
SEC EDGAR
Insider filers
9
Insider buys (14)
$100.5M
Insider sells (66)
$10.6M
Insider sentiment
Net buyingNet insider flow of $89.9M in net buying since July 2021.
Recent CTKB insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Jun 3, 2025 | William D. Mccombe | Chief Financial Officer | Purchase | 35.0K | $2.78 | $97.3K | SEC ↗ |
| Apr 23, 2024 | Ming Yan | CHIEF TECHNOLOGY OFFICER | Sale | 20.0K | $5.87 | $117.4K | SEC ↗ |
| Apr 11, 2024 | Ming Yan | CHIEF TECHNOLOGY OFFICER | Sale | 1.9K | $7.00 | $13.3K | SEC ↗ |
| Mar 19, 2024 | Ming Yan | CHIEF TECHNOLOGY OFFICER | Sale | 40.0K | $6.74 | $269.6K | SEC ↗ |
| Dec 27, 2023 | Patrik Jeanmonod | Chief Financial Officer | Sale | 3.0K | $9.50 | $28.5K | SEC ↗ |
| Dec 21, 2023 | Ming Yan | Chief Technology Officer | Sale | 20.0K | $9.43 | $188.6K | SEC ↗ |
| Nov 28, 2023 | Patrik Jeanmonod | Chief Financial Officer | Sale | 3.0K | $6.94 | $20.8K | SEC ↗ |
| Nov 21, 2023 | Ming Yan | Chief Technology Officer | Sale | 20.0K | $6.03 | $120.6K | SEC ↗ |
| Nov 8, 2023 | Jiang Wenbin | President and CEO | Sale | 20.0K | $4.34 | $86.8K | SEC ↗ |
| Oct 25, 2023 | Patrik Jeanmonod | Chief Financial Officer | Sale | 3.0K | $4.68 | $14.0K | SEC ↗ |
| Oct 24, 2023 | Ming Yan | Chief Technology Officer | Sale | 20.0K | $4.80 | $96.0K | SEC ↗ |
| Oct 11, 2023 | Jiang Wenbin | President and CEO | Sale | 20.0K | $5.33 | $106.6K | SEC ↗ |
| Sep 26, 2023 | Patrik Jeanmonod | Chief Financial Officer | Sale | 3.0K | $6.38 | $19.1K | SEC ↗ |
| Sep 20, 2023 | Ming Yan | Chief Technology Officer | Sale | 20.0K | $6.49 | $129.8K | SEC ↗ |
| Sep 8, 2023 | Jiang Wenbin | President and CEO | Sale | 20.0K | $6.83 | $136.6K | SEC ↗ |
| Aug 28, 2023 | Patrik Jeanmonod | Chief Financial Officer | Sale | 3.0K | $7.69 | $23.1K | SEC ↗ |
| Aug 22, 2023 | Ming Yan | Chief Technology Officer | Sale | 20.0K | $8.07 | $161.4K | SEC ↗ |
| Aug 9, 2023 | Jiang Wenbin | President and CEO | Sale | 20.0K | $9.04 | $180.8K | SEC ↗ |
| Jul 25, 2023 | Patrik Jeanmonod | Chief Financial Officer | Purchase | 3.0K | $9.17 | $27.5K | SEC ↗ |
| Jul 20, 2023 | Ming Yan | Chief Technology Officer | Sale | 20.0K | $8.76 | $175.2K | SEC ↗ |
| Jul 8, 2023 | Jiang Wenbin | President and CEO | Sale | 20.0K | $8.48 | $169.6K | SEC ↗ |
| Jun 27, 2023 | Patrik Jeanmonod | Chief Financial Officer | Sale | 3.0K | $7.96 | $23.9K | SEC ↗ |
| Jun 21, 2023 | Ming Yan | Chief Technology Officer | Sale | 20.0K | $8.18 | $163.6K | SEC ↗ |
| Jun 7, 2023 | Jiang Wenbin | President and CEO | Sale | 20.0K | $8.23 | $164.6K | SEC ↗ |
| May 25, 2023 | Patrik Jeanmonod | Chief Financial Officer | Sale | 3.0K | $7.76 | $23.3K | SEC ↗ |
Showing the 25 most recent of 80 Form 4 filings for Cytek Biosciences, Inc..
Most active CTKB insiders
- Ming Yan29 filings
- Jiang Wenbin21 filings
- Patrik Jeanmonod16 filings
- Peter Kolchinsky8 filings
- Jack Ball2 filings
Ask anything about CTKB insider activity
Use Trabud's AI agent to query Cytek Biosciences, Inc.'s Form 4 history in plain English — "Show me CTKB CEO purchases this year" or compare it against any other ticker.
Open the AI agentCTKB insider trading FAQ
Are Cytek Biosciences, Inc. insiders buying or selling?
Cytek Biosciences, Inc. insiders reported no open-market purchases or sales in the last 12 months. Since July 2021, Trabud has recorded 80 Form 4 filings for CTKB: 14 buys ($100.5M) and 66 sells ($10.6M). Over the full record that is net buying of $89.9M.
How many insiders trade CTKB stock?
9 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for Cytek Biosciences, Inc.. The most recent filing was accepted on Jun 3, 2025.
Where does Trabud get CTKB insider trading data?
All CTKB insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.