Cytek Biosciences, Inc. SEC filings CTKB
Cytek Biosciences, Inc. has 464 filings in SEC EDGAR's recent list, going back to Nov 10, 2020. Its latest annual report, Form ARS, was filed on Apr 28, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 4, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 4, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 3, 2026 | — |
| 144 | Notice of proposed sale | Sep 2, 2026 | — |
| 4 | Insider transaction | Aug 20, 2026 | Aug 18, 2026 |
| 4 | Insider transaction | Aug 20, 2026 | Aug 18, 2026 |
| 4 | Insider transaction | Aug 20, 2026 | Aug 18, 2026 |
| 4 | Insider transaction | Aug 20, 2026 | Aug 18, 2026 |
| 4 | Insider transaction | Aug 20, 2026 | Aug 18, 2026 |
| 4 | Insider transaction | Aug 20, 2026 | Aug 18, 2026 |
| 4 | Insider transaction | Aug 12, 2026 | Aug 10, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 6, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 4, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 8, 2026 | — |
| 3 | Initial insider ownership | Jun 30, 2026 | Jun 29, 2026 |
| 4 | Insider transaction | Jun 16, 2026 | Jun 12, 2026 |
| 4 | Insider transaction | Jun 12, 2026 | Jun 10, 2026 |
| 4 | Insider transaction | Jun 12, 2026 | Jun 10, 2026 |
| 3 | Initial insider ownership | Jun 12, 2026 | Jun 10, 2026 |
| 4 | Insider transaction | Jun 12, 2026 | Jun 10, 2026 |
| 4 | Insider transaction | Jun 12, 2026 | Jun 10, 2026 |
| 4 | Insider transaction | Jun 12, 2026 | Jun 10, 2026 |
| 4 | Insider transaction | Jun 12, 2026 | Jun 10, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 18, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 18, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 18, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 18, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 18, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 18, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 18, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 18, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 9, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| 4 | Insider transaction | Mar 13, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 12, 2026 | Mar 10, 2026 |
| 4 | Insider transaction | Mar 12, 2026 | Mar 10, 2026 |
| 4 | Insider transaction | Mar 12, 2026 | Mar 10, 2026 |
| 4 | Insider transaction | Mar 12, 2026 | Mar 10, 2026 |
| 4 | Insider transaction | Mar 12, 2026 | Mar 10, 2026 |
| 4 | Insider transaction | Mar 12, 2026 | Mar 10, 2026 |
| 4 | Insider transaction | Mar 12, 2026 | Mar 10, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Nov 20, 2025 | Nov 18, 2025 |
| 4 | Insider transaction | Nov 20, 2025 | Nov 18, 2025 |
| 4 | Insider transaction | Nov 20, 2025 | Nov 18, 2025 |
| 4 | Insider transaction | Nov 20, 2025 | Nov 18, 2025 |
| 4 | Insider transaction | Nov 20, 2025 | Nov 18, 2025 |
| 4 | Insider transaction | Nov 20, 2025 | Nov 18, 2025 |
| 4 | Insider transaction | Nov 20, 2025 | Nov 18, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Nov 17, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 12, 2025 | — |
| 4 | Insider transaction | Aug 20, 2025 | Aug 18, 2025 |
| 4 | Insider transaction | Aug 20, 2025 | Aug 18, 2025 |
| 4 | Insider transaction | Aug 20, 2025 | Aug 18, 2025 |
| 4 | Insider transaction | Aug 20, 2025 | Aug 18, 2025 |
| 4 | Insider transaction | Aug 20, 2025 | Aug 18, 2025 |
| 4 | Insider transaction | Aug 20, 2025 | Aug 18, 2025 |
| 4 | Insider transaction | Aug 20, 2025 | Aug 18, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 29, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 18, 2025 | — |
| 4 | Insider transaction | Jun 20, 2025 | Jun 18, 2025 |
| 3 | Initial insider ownership | Jun 20, 2025 | Jun 18, 2025 |
| 4 | Insider transaction | Jun 20, 2025 | Jun 18, 2025 |
| 4 | Insider transaction | Jun 20, 2025 | Jun 18, 2025 |
| 4 | Insider transaction | Jun 20, 2025 | Jun 18, 2025 |
| 4 | Insider transaction | Jun 20, 2025 | Jun 18, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 2, 2025 |
| 4 | Insider transaction | May 21, 2025 | May 19, 2025 |
| 4 | Insider transaction | May 21, 2025 | May 19, 2025 |
| 4 | Insider transaction | May 21, 2025 | May 19, 2025 |
| 4 | Insider transaction | May 21, 2025 | May 19, 2025 |
| 4 | Insider transaction | May 21, 2025 | May 19, 2025 |
| 4 | Insider transaction | May 21, 2025 | May 19, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 30, 2025 | — |
| 4 | Insider transaction | Mar 12, 2025 | Mar 10, 2025 |
| 4 | Insider transaction | Mar 12, 2025 | Mar 10, 2025 |
| 4 | Insider transaction | Mar 12, 2025 | Mar 10, 2025 |
| 4 | Insider transaction | Mar 12, 2025 | Mar 10, 2025 |
| 4 | Insider transaction | Mar 12, 2025 | Mar 10, 2025 |
| 4 | Insider transaction | Mar 6, 2025 | Mar 4, 2025 |
| 4 | Insider transaction | Mar 6, 2025 | Mar 4, 2025 |
| 4 | Insider transaction | Mar 6, 2025 | Mar 4, 2025 |
| 4 | Insider transaction | Mar 6, 2025 | Mar 4, 2025 |
| 4 | Insider transaction | Mar 6, 2025 | Mar 4, 2025 |
| 4 | Insider transaction | Feb 20, 2025 | Feb 18, 2025 |
| 4 | Insider transaction | Feb 20, 2025 | Feb 18, 2025 |
| 4 | Insider transaction | Feb 20, 2025 | Feb 18, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 5, 2025 | — |
| 4 | Insider transaction | Nov 20, 2024 | Nov 18, 2024 |
| 4 | Insider transaction | Nov 20, 2024 | Nov 18, 2024 |
| 4 | Insider transaction | Nov 20, 2024 | Nov 18, 2024 |
| 4 | Insider transaction | Nov 20, 2024 | Nov 18, 2024 |
| 4 | Insider transaction | Nov 20, 2024 | Nov 18, 2024 |
| 4 | Insider transaction | Nov 20, 2024 | Nov 18, 2024 |
| SC 13G | Ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| 4 | Insider transaction | Sep 16, 2024 | Sep 14, 2024 |
| 4 | Insider transaction | Aug 21, 2024 | Aug 19, 2024 |
| 4 | Insider transaction | Aug 21, 2024 | Aug 19, 2024 |
| 4 | Insider transaction | Aug 21, 2024 | Aug 19, 2024 |
| 4 | Insider transaction | Aug 21, 2024 | Aug 19, 2024 |
| 4 | Insider transaction | Aug 21, 2024 | Aug 19, 2024 |
| 4 | Insider transaction | Aug 21, 2024 | Aug 19, 2024 |
| 4 | Insider transaction | Aug 21, 2024 | Aug 19, 2024 |
| 4 | Insider transaction | Jun 7, 2024 | Jun 5, 2024 |
| 3 | Initial insider ownership | Jun 7, 2024 | Jun 5, 2024 |
| 4 | Insider transaction | Jun 7, 2024 | Jun 5, 2024 |
| 4 | Insider transaction | Jun 7, 2024 | Jun 5, 2024 |
| 4 | Insider transaction | Jun 7, 2024 | Jun 5, 2024 |
| 4 | Insider transaction | Jun 7, 2024 | Jun 5, 2024 |
| 4 | Insider transaction | May 22, 2024 | May 20, 2024 |
| 4 | Insider transaction | May 22, 2024 | May 20, 2024 |
| 4 | Insider transaction | May 22, 2024 | May 20, 2024 |
| 4 | Insider transaction | May 22, 2024 | May 20, 2024 |
| 4 | Insider transaction | May 22, 2024 | May 20, 2024 |
| 4 | Insider transaction | May 22, 2024 | May 20, 2024 |
| 4 | Insider transaction | May 15, 2024 | May 13, 2024 |
| 4 | Insider transaction | Apr 23, 2024 | Apr 19, 2024 |
| 4 | Insider transaction | Apr 11, 2024 | Apr 9, 2024 |
| 144 | Notice of proposed sale | Apr 9, 2024 | — |
| 4 | Insider transaction | Mar 21, 2024 | Mar 20, 2024 |
| 3 | Initial insider ownership | Mar 20, 2024 | Mar 18, 2024 |
| 4 | Insider transaction | Mar 19, 2024 | Mar 18, 2024 |
| 144 | Notice of proposed sale | Mar 18, 2024 | — |
| 4 | Insider transaction | Mar 13, 2024 | Mar 11, 2024 |
| 4 | Insider transaction | Mar 13, 2024 | Mar 11, 2024 |
| 4 | Insider transaction | Mar 13, 2024 | Mar 11, 2024 |
| 4 | Insider transaction | Mar 13, 2024 | Mar 11, 2024 |
| 4 | Insider transaction | Mar 13, 2024 | Mar 11, 2024 |
| 4 | Insider transaction | Mar 13, 2024 | Mar 11, 2024 |
| 4 | Insider transaction | Mar 8, 2024 | Mar 6, 2024 |
| 4 | Insider transaction | Mar 8, 2024 | Mar 6, 2024 |
| 4 | Insider transaction | Mar 8, 2024 | Mar 6, 2024 |
| 4 | Insider transaction | Mar 8, 2024 | Mar 6, 2024 |
| 4 | Insider transaction | Mar 8, 2024 | Mar 6, 2024 |
| 4 | Insider transaction | Mar 8, 2024 | Mar 6, 2024 |
| SC 13G | Ownership over 5% (passive) | Feb 22, 2024 | — |
| 4 | Insider transaction | Feb 22, 2024 | Feb 20, 2024 |
| 4 | Insider transaction | Feb 22, 2024 | Feb 20, 2024 |
| 4 | Insider transaction | Feb 22, 2024 | Feb 20, 2024 |
| 4 | Insider transaction | Feb 22, 2024 | Feb 20, 2024 |
| 4 | Insider transaction | Feb 22, 2024 | Feb 20, 2024 |
| 4 | Insider transaction | Feb 22, 2024 | Feb 20, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 23, 2024 | — |
| 4 | Insider transaction | Dec 27, 2023 | Dec 26, 2023 |
| 4 | Insider transaction | Dec 21, 2023 | Dec 19, 2023 |
| 144 | Notice of proposed sale | Dec 19, 2023 | — |
| 4 | Insider transaction | Nov 27, 2023 | Nov 24, 2023 |
| 4 | Insider transaction | Nov 27, 2023 | Nov 14, 2023 |
| 4 | Insider transaction | Nov 21, 2023 | Nov 18, 2023 |
| 4 | Insider transaction | Nov 21, 2023 | Nov 18, 2023 |
| 4 | Insider transaction | Nov 21, 2023 | Nov 18, 2023 |
| 4 | Insider transaction | Nov 21, 2023 | Nov 18, 2023 |
| 4 | Insider transaction | Nov 21, 2023 | Nov 18, 2023 |
| 4 | Insider transaction | Nov 21, 2023 | Nov 18, 2023 |
| 144 | Notice of proposed sale | Nov 15, 2023 | — |
| 4 | Insider transaction | Nov 8, 2023 | Nov 7, 2023 |
| 4 | Insider transaction | Oct 25, 2023 | Oct 24, 2023 |
| 144 | Notice of proposed sale | Oct 24, 2023 | — |
| 4 | Insider transaction | Oct 23, 2023 | Oct 19, 2023 |
| 144 | Notice of proposed sale | Oct 19, 2023 | — |
| 4 | Insider transaction | Oct 11, 2023 | Oct 9, 2023 |
| 4 | Insider transaction | Oct 5, 2023 | Sep 14, 2023 |
| 4 | Insider transaction | Sep 26, 2023 | Sep 25, 2023 |
| 4 | Insider transaction | Sep 20, 2023 | Sep 19, 2023 |
| SC 13D/A | Amended ownership over 5% (active) | Sep 19, 2023 | — |
| 4 | Insider transaction | Sep 8, 2023 | Sep 7, 2023 |
| 144 | Notice of proposed sale | Sep 7, 2023 | — |
| 3 | Initial insider ownership | Aug 29, 2023 | Aug 28, 2023 |
| 4 | Insider transaction | Aug 28, 2023 | Aug 24, 2023 |
| 4 | Insider transaction | Aug 21, 2023 | Aug 18, 2023 |
| 4 | Insider transaction | Aug 21, 2023 | Aug 18, 2023 |
| 4 | Insider transaction | Aug 21, 2023 | Aug 18, 2023 |
| 4 | Insider transaction | Aug 21, 2023 | Aug 18, 2023 |
| 4 | Insider transaction | Aug 21, 2023 | Aug 18, 2023 |
| 4 | Insider transaction | Aug 21, 2023 | Aug 18, 2023 |
| 4 | Insider transaction | Aug 21, 2023 | Aug 18, 2023 |
| 144 | Notice of proposed sale | Aug 21, 2023 | — |
| 144 | Notice of proposed sale | Aug 14, 2023 | — |
| 4 | Insider transaction | Aug 8, 2023 | Aug 7, 2023 |
| 4 | Insider transaction | Jul 25, 2023 | Jul 24, 2023 |
| 144 | Notice of proposed sale | Jul 24, 2023 | — |
| 4 | Insider transaction | Jul 20, 2023 | Jul 19, 2023 |
| 4 | Insider transaction | Jul 7, 2023 | Jul 7, 2023 |
| 4 | Insider transaction | Jun 27, 2023 | Jun 26, 2023 |
| 4 | Insider transaction | Jun 21, 2023 | Jun 20, 2023 |
| 144 | Notice of proposed sale | Jun 20, 2023 | — |
| 4 | Insider transaction | Jun 16, 2023 | Jun 14, 2023 |
| 4 | Insider transaction | Jun 16, 2023 | Jun 14, 2023 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Laboratory Analytical Instruments (SIC 3826)
- Listed as
- CTKB (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Fremont, CA
- SEC filer status
- Accelerated filer
- SEC CIK
- 1831915
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.