The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 18, 2026 | Muir Glenn P | Director | Option exercise(M) | 3K | — | $0 |
| Aug 18, 2026 | Muir Glenn P | Director | Option exercise(M) | 3K | — | — |
| Aug 18, 2026 | McCombe William D. | Chief Financial Officer | Option exercise(M) | 16K | — | $0 |
| Aug 18, 2026 | McCombe William D. | Chief Financial Officer | Option exercise(M) | 13K | — | $0 |
| Aug 18, 2026 | McCombe William D. | Chief Financial Officer | Option exercise(M) | 6K | — | $0 |
| Aug 18, 2026 | McCombe William D. | Chief Financial Officer | Tax withholding(F) | 5K | $4.67 | $25K |
| Aug 18, 2026 | McCombe William D. | Chief Financial Officer | Option exercise(M) | 16K | — | — |
| Aug 18, 2026 | McCombe William D. | Chief Financial Officer | Tax withholding(F) | 4K | $4.67 | $21K |
| Aug 18, 2026 | McCombe William D. | Chief Financial Officer | Option exercise(M) | 13K | — | — |
| Aug 18, 2026 | McCombe William D. | Chief Financial Officer | Tax withholding(F) | 2K | $4.67 | $10K |
| Aug 18, 2026 | McCombe William D. | Chief Financial Officer | Option exercise(M) | 6K | — | — |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO, Director | Option exercise(M) | 57K | — | $0 |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO, Director | Option exercise(M) | 29K | — | $0 |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO, Director | Option exercise(M) | 22K | — | $0 |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO, Director | Option exercise(M) | 12K | — | $0 |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO, Director | Tax withholding(F) | 21K | $4.67 | $98K |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO, Director | Option exercise(M) | 57K | — | — |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO, Director | Tax withholding(F) | 7K | $4.67 | $33K |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO, Director | Option exercise(M) | 29K | — | — |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO, Director | Tax withholding(F) | 5K | $4.67 | $25K |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO, Director | Option exercise(M) | 22K | — | — |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO, Director | Tax withholding(F) | 3K | $4.67 | $13K |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO, Director | Option exercise(M) | 12K | — | — |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER, Director | Option exercise(M) | 14K | — | $0 |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER, Director | Option exercise(M) | 6K | — | $0 |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER, Director | Option exercise(M) | 6K | — | $0 |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER, Director | Option exercise(M) | 7K | — | $0 |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER, Director | Tax withholding(F) | 3K | $4.67 | $16K |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER, Director | Option exercise(M) | 14K | — | — |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER, Director | Tax withholding(F) | 2K | $4.67 | $7K |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER, Director | Option exercise(M) | 6K | — | — |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER, Director | Tax withholding(F) | 1K | $4.67 | $6K |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER, Director | Option exercise(M) | 6K | — | — |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER, Director | Tax withholding(F) | 2K | $4.67 | $8K |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER, Director | Option exercise(M) | 7K | — | — |
| Aug 18, 2026 | Holder Michael | Director | Option exercise(M) | 2K | — | $0 |
| Aug 18, 2026 | Holder Michael | Director | Option exercise(M) | 2K | — | — |
| Aug 18, 2026 | Chin Richard | Director | Option exercise(M) | 6K | — | $0 |
| Aug 18, 2026 | Chin Richard | Director | Option exercise(M) | 6K | — | — |
| Aug 10, 2026 | Feuchtwang Ilan | Chief Legal Officer, Secretary | Grant(A) | 241K | — | $0 |
| Aug 10, 2026 | Feuchtwang Ilan | Chief Legal Officer, Secretary | Grant(A) | 127K | — | $0 |
| Jun 12, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER, Director | Gift(G) | 136K | — | $0 |
| Jun 10, 2026 | Chin Richard | Director | Grant(A) | 33K | — | $0 |
| Jun 10, 2026 | Chin Richard | Director | Grant(A) | 18K | — | $0 |
| Jun 10, 2026 | Imper Vera | Director | Option exercise(M) | 44K | — | — |
| Jun 10, 2026 | Imper Vera | Director | Grant(A) | 33K | — | $0 |
| Jun 10, 2026 | Imper Vera | Director | Grant(A) | 18K | — | $0 |
| Jun 10, 2026 | Imper Vera | Director | Option exercise(M) | 44K | — | $0 |
| Jun 10, 2026 | Ball Jack | Director | Option exercise(M) | 44K | — | — |
| Jun 10, 2026 | Ball Jack | Director | Option exercise(M) | 44K | — | $0 |
| Jun 10, 2026 | Muir Glenn P | Director | Grant(A) | 56K | — | $0 |
| Jun 10, 2026 | Muir Glenn P | Director | Grant(A) | 30K | — | $0 |
| Jun 10, 2026 | Neff Deborah J | Director | Option exercise(M) | 44K | — | — |
| Jun 10, 2026 | Neff Deborah J | Director | Grant(A) | 33K | — | $0 |
| Jun 10, 2026 | Neff Deborah J | Director | Grant(A) | 18K | — | $0 |
| Jun 10, 2026 | Neff Deborah J | Director | Option exercise(M) | 44K | — | $0 |
| Jun 10, 2026 | Holder Michael | Director | Option exercise(M) | 44K | — | — |
| Jun 10, 2026 | Holder Michael | Director | Grant(A) | 33K | — | $0 |
| Jun 10, 2026 | Holder Michael | Director | Grant(A) | 18K | — | $0 |
| Jun 10, 2026 | Holder Michael | Director | Option exercise(M) | 44K | — | $0 |
| May 18, 2026 | Chin Richard | Director | Option exercise(M) | 6K | — | — |
| May 18, 2026 | Chin Richard | Director | Option exercise(M) | 6K | — | $0 |
| May 18, 2026 | McCombe William D. | Chief Financial Officer | Option exercise(M) | 6K | — | — |
| May 18, 2026 | McCombe William D. | Chief Financial Officer | Tax withholding(F) | 2K | $3.55 | $8K |
| May 18, 2026 | McCombe William D. | Chief Financial Officer | Option exercise(M) | 9K | — | — |
| May 18, 2026 | McCombe William D. | Chief Financial Officer | Tax withholding(F) | 3K | $3.55 | $11K |
| May 18, 2026 | McCombe William D. | Chief Financial Officer | Option exercise(M) | 11K | — | — |
| May 18, 2026 | McCombe William D. | Chief Financial Officer | Tax withholding(F) | 4K | $3.55 | $14K |
| May 18, 2026 | McCombe William D. | Chief Financial Officer | Option exercise(M) | 6K | — | $0 |
| May 18, 2026 | McCombe William D. | Chief Financial Officer | Option exercise(M) | 9K | — | $0 |
| May 18, 2026 | Busque Philippe | SVP, GLOBAL SALES AND SERVICES | Option exercise(M) | 1K | — | — |
| May 18, 2026 | Busque Philippe | SVP, GLOBAL SALES AND SERVICES | Tax withholding(F) | 263 | $3.55 | $934 |
| May 18, 2026 | Busque Philippe | SVP, GLOBAL SALES AND SERVICES | Option exercise(M) | 1K | — | — |
| May 18, 2026 | Busque Philippe | SVP, GLOBAL SALES AND SERVICES | Tax withholding(F) | 378 | $3.55 | $1K |
| May 18, 2026 | Busque Philippe | SVP, GLOBAL SALES AND SERVICES | Option exercise(M) | 2K | — | — |
| May 18, 2026 | Busque Philippe | SVP, GLOBAL SALES AND SERVICES | Tax withholding(F) | 620 | $3.55 | $2K |
| May 18, 2026 | Busque Philippe | SVP, GLOBAL SALES AND SERVICES | Option exercise(M) | 6K | — | — |
| May 18, 2026 | Busque Philippe | SVP, GLOBAL SALES AND SERVICES | Tax withholding(F) | 1K | $3.55 | $5K |
| May 18, 2026 | Busque Philippe | SVP, GLOBAL SALES AND SERVICES | Option exercise(M) | 1K | — | $0 |
| May 18, 2026 | Barnett Valerie | CHIEF LEGAL OFFICER | Option exercise(M) | 2K | — | — |
| May 18, 2026 | Barnett Valerie | CHIEF LEGAL OFFICER | Tax withholding(F) | 881 | $3.55 | $3K |
| May 18, 2026 | Barnett Valerie | CHIEF LEGAL OFFICER | Option exercise(M) | 5K | — | — |
| May 18, 2026 | Barnett Valerie | CHIEF LEGAL OFFICER | Tax withholding(F) | 2K | $3.55 | $7K |
| May 18, 2026 | Barnett Valerie | CHIEF LEGAL OFFICER | Option exercise(M) | 7K | — | — |
| May 18, 2026 | Barnett Valerie | CHIEF LEGAL OFFICER | Tax withholding(F) | 3K | $3.55 | $9K |
| May 18, 2026 | Barnett Valerie | CHIEF LEGAL OFFICER | Option exercise(M) | 9K | — | — |
| May 18, 2026 | Barnett Valerie | CHIEF LEGAL OFFICER | Tax withholding(F) | 3K | $3.55 | $12K |
| May 18, 2026 | Barnett Valerie | CHIEF LEGAL OFFICER | Option exercise(M) | 2K | — | $0 |
| May 18, 2026 | Barnett Valerie | CHIEF LEGAL OFFICER | Option exercise(M) | 5K | — | $0 |
| May 18, 2026 | Barnett Valerie | CHIEF LEGAL OFFICER | Option exercise(M) | 7K | — | $0 |
| May 18, 2026 | Barnett Valerie | CHIEF LEGAL OFFICER | Option exercise(M) | 9K | — | $0 |
| May 18, 2026 | Busque Philippe | SVP, GLOBAL SALES AND SERVICES | Option exercise(M) | 1K | — | $0 |
| May 18, 2026 | Busque Philippe | SVP, GLOBAL SALES AND SERVICES | Option exercise(M) | 2K | — | $0 |
| May 18, 2026 | Busque Philippe | SVP, GLOBAL SALES AND SERVICES | Option exercise(M) | 6K | — | $0 |
| May 18, 2026 | Holder Michael | Director | Option exercise(M) | 1K | — | — |
| May 18, 2026 | Holder Michael | Director | Option exercise(M) | 1K | — | $0 |
| May 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO, Director | Option exercise(M) | 8K | — | — |
| May 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO, Director | Tax withholding(F) | 2K | $3.55 | $7K |
| May 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO, Director | Option exercise(M) | 15K | — | — |
| May 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO, Director | Tax withholding(F) | 4K | $3.55 | $13K |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Issuer: Cytek Biosciences, Inc., SEC CIK 0001831915. The symbol on a Form 4 is typed by the filer, so this page follows the issuer with the newest filing under CTKB and shows every filing by that issuer.
Coverage: Form 4 filings indexed 2006-01-02 → 2026-09-12. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).
Connected pages for CTKB