CTKB insider transaction filings
Cytek Biosciences, Inc. — 50 most recent Form 4 filings from SEC EDGAR, normalized by FilingPulse. Latest filing: 2026-08-20. Screen CTKB transaction legs live →
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-08-20 | 4 | McCombe William D. — Chief Financial Officer | Option exercise (M): 6,320 · Tax withholding (F): 2,111 @ $4.67 · Option exercise (M): 13,051 · Tax withholding (F): 4,392 @ $4.67 · Option exercise (M): 16,049 · Tax withholding (F): 5,401 @ $4.67 · +3 more | EDGAR |
| 2026-08-20 | 4 | Jiang Wenbin — PRESIDENT AND CEO, Director | Option exercise (M): 11,781 · Tax withholding (F): 2,869 @ $4.67 · Option exercise (M): 22,100 · Tax withholding (F): 5,382 @ $4.67 · Option exercise (M): 29,002 · Tax withholding (F): 7,062 @ $4.67 · +6 more | EDGAR |
| 2026-08-20 | 4 | MUIR GLENN P — Director | Option exercise (M): 3,086 · Option exercise (M): 3,086 (derivative) @ $0 | EDGAR |
| 2026-08-20 | 4 | Chin Richard — Director | Option exercise (M): 6,107 · Option exercise (M): 6,107 (derivative) @ $0 | EDGAR |
| 2026-08-20 | 4 | Holder Michael — Director | Option exercise (M): 2,181 · Option exercise (M): 2,181 (derivative) @ $0 | EDGAR |
| 2026-08-20 | 4 | Yan Ming — CHIEF TECHNOLOGY OFFICER, Director | Option exercise (M): 7,363 · Tax withholding (F): 1,778 @ $4.67 · Option exercise (M): 5,525 · Tax withholding (F): 1,346 @ $4.67 · Option exercise (M): 6,162 · Tax withholding (F): 1,501 @ $4.67 · +6 more | EDGAR |
| 2026-08-12 | 4 | Feuchtwang Ilan — Chief Legal Officer, Secretary | Grant/award (A): 241,416 (derivative) @ $0 · Grant/award (A): 127,118 (derivative) @ $0 | EDGAR |
| 2026-06-16 | 4 | Yan Ming — CHIEF TECHNOLOGY OFFICER, Director | Gift (G): 135,892 @ $0 | EDGAR |
| 2026-06-12 | 4 | Imper Vera — Director | Option exercise (M): 43,973 · Grant/award (A): 33,333 (derivative) @ $0 · Grant/award (A): 18,261 (derivative) @ $0 · Option exercise (M): 43,973 (derivative) @ $0 | EDGAR |
| 2026-06-12 | 4 | Ball Jack — Director | Option exercise (M): 43,973 · Option exercise (M): 43,973 (derivative) @ $0 | EDGAR |
| 2026-06-12 | 4 | Holder Michael — Director | Option exercise (M): 43,973 · Grant/award (A): 33,333 (derivative) @ $0 · Grant/award (A): 18,261 (derivative) @ $0 · Option exercise (M): 43,973 (derivative) @ $0 | EDGAR |
| 2026-06-12 | 4 | Chin Richard — Director | Grant/award (A): 33,333 (derivative) @ $0 · Grant/award (A): 18,261 (derivative) @ $0 | EDGAR |
| 2026-06-12 | 4 | NEFF DEBORAH J — Director | Option exercise (M): 43,973 · Grant/award (A): 33,333 (derivative) @ $0 · Grant/award (A): 18,261 (derivative) @ $0 · Option exercise (M): 43,973 (derivative) @ $0 | EDGAR |
| 2026-06-12 | 4 | MUIR GLENN P — Director | Grant/award (A): 55,555 (derivative) @ $0 · Grant/award (A): 29,835 (derivative) @ $0 | EDGAR |
| 2026-05-20 | 4 | Busque Philippe — SVP, GLOBAL SALES AND SERVICES | Option exercise (M): 1,024 · Tax withholding (F): 263 @ $3.55 · Option exercise (M): 1,473 · Tax withholding (F): 378 @ $3.55 · Option exercise (M): 2,416 · Tax withholding (F): 620 @ $3.55 · +6 more | EDGAR |
| 2026-05-20 | 4 | McCombe William D. — Chief Financial Officer | Option exercise (M): 6,320 · Tax withholding (F): 2,268 @ $3.55 · Option exercise (M): 8,700 · Tax withholding (F): 3,122 @ $3.55 · Option exercise (M): 10,699 · Tax withholding (F): 3,839 @ $3.55 · +3 more | EDGAR |
| 2026-05-20 | 4 | Yan Ming — CHIEF TECHNOLOGY OFFICER, Director | Option exercise (M): 4,908 · Tax withholding (F): 1,224 @ $3.55 · Option exercise (M): 3,683 · Tax withholding (F): 919 @ $3.55 · Option exercise (M): 4,108 · Tax withholding (F): 1,025 @ $3.55 · +6 more | EDGAR |
| 2026-05-20 | 4 | Barnett Valerie — CHIEF LEGAL OFFICER | Option exercise (M): 2,454 · Tax withholding (F): 881 @ $3.55 · Option exercise (M): 5,156 · Tax withholding (F): 1,850 @ $3.55 · Option exercise (M): 7,250 · Tax withholding (F): 2,602 @ $3.55 · +6 more | EDGAR |
| 2026-05-20 | 4 | Jiang Wenbin — PRESIDENT AND CEO, Director | Option exercise (M): 7,854 · Tax withholding (F): 1,913 @ $3.55 · Option exercise (M): 14,733 · Tax withholding (F): 3,588 @ $3.55 · Option exercise (M): 19,334 · Tax withholding (F): 5,032 @ $3.55 · +6 more | EDGAR |
| 2026-05-20 | 4 | Holder Michael — Director | Option exercise (M): 1,454 · Option exercise (M): 1,454 (derivative) @ $0 | EDGAR |
| 2026-05-20 | 4 | Chin Richard — Director | Option exercise (M): 6,107 · Option exercise (M): 6,107 (derivative) @ $0 | EDGAR |
| 2026-03-13 | 4 | Yan Ming — CHIEF TECHNOLOGY OFFICER, Director | Gift (G): 1,176,000 @ $0 | EDGAR |
| 2026-03-12 | 4 | Busque Philippe — SVP, GLOBAL SALES AND SERVICES | Option exercise (M): 2,049 · Tax withholding (F): 635 @ $4.23 · Option exercise (M): 2,946 · Tax withholding (F): 912 @ $4.23 · Option exercise (M): 4,833 · Tax withholding (F): 1,496 @ $4.23 · +5 more | EDGAR |
| 2026-03-12 | 4 | McCombe William D. — Chief Financial Officer | Option exercise (M): 6,320 · Tax withholding (F): 2,603 @ $4.23 · Option exercise (M): 17,401 · Tax withholding (F): 7,145 @ $4.23 · Grant/award (A): 136,205 (derivative) @ $0 · Grant/award (A): 256,790 (derivative) @ $0 · +2 more | EDGAR |
| 2026-03-12 | 4 | Yan Ming — CHIEF TECHNOLOGY OFFICER, Director | Option exercise (M): 9,817 · Tax withholding (F): 3,047 @ $4.23 · Option exercise (M): 7,366 · Tax withholding (F): 2,287 @ $4.23 · Option exercise (M): 8,217 · Tax withholding (F): 2,397 @ $4.23 · +5 more | EDGAR |
| 2026-03-12 | 4 | Barnett Valerie — CHIEF LEGAL OFFICER | Option exercise (M): 4,908 · Tax withholding (F): 1,761 @ $4.23 · Option exercise (M): 10,313 · Tax withholding (F): 4,247 @ $4.23 · Option exercise (M): 14,501 · Tax withholding (F): 5,740 @ $4.23 · +5 more | EDGAR |
| 2026-03-12 | 4 | Jiang Wenbin — PRESIDENT AND CEO, Director | Option exercise (M): 15,708 · Tax withholding (F): 3,825 @ $4.23 · Option exercise (M): 29,467 · Tax withholding (F): 7,747 @ $4.23 · Option exercise (M): 38,669 · Tax withholding (F): 9,416 @ $4.23 · +5 more | EDGAR |
| 2026-03-12 | 4 | Holder Michael — Director | Option exercise (M): 2,908 · Option exercise (M): 2,908 (derivative) @ $0 | EDGAR |
| 2026-03-12 | 4 | Chin Richard — Director | Option exercise (M): 6,107 · Option exercise (M): 6,107 (derivative) @ $0 | EDGAR |
| 2026-02-20 | 4 | Yan Ming — CHIEF TECHNOLOGY OFFICER, Director | Option exercise (M): 1,332 · Tax withholding (F): 395 @ $4.20 · Option exercise (M): 1,332 (derivative) @ $0 | EDGAR |
| 2026-02-20 | 4 | Barnett Valerie — CHIEF LEGAL OFFICER | Option exercise (M): 1,346 · Tax withholding (F): 525 @ $4.20 · Option exercise (M): 1,346 (derivative) @ $0 | EDGAR |
| 2026-02-20 | 4 | Jiang Wenbin — PRESIDENT AND CEO, Director | Option exercise (M): 4,514 · Tax withholding (F): 1,339 @ $4.20 · Option exercise (M): 4,514 (derivative) @ $0 | EDGAR |
| 2025-11-20 | 4 | Busque Philippe — SVP, GLOBAL SALES AND SERVICES | Option exercise (M): 1,536 · Tax withholding (F): 393 @ $5.53 · Option exercise (M): 2,210 · Tax withholding (F): 565 @ $5.53 · Option exercise (M): 3,625 · Tax withholding (F): 927 @ $5.53 · +3 more | EDGAR |
| 2025-11-20 | 4 | McCombe William D. — Chief Financial Officer | Option exercise (M): 6,320 · Tax withholding (F): 2,032 @ $5.53 · Option exercise (M): 13,051 · Tax withholding (F): 4,196 @ $5.53 · Option exercise (M): 6,320 (derivative) @ $0 · Option exercise (M): 13,051 (derivative) @ $0 | EDGAR |
| 2025-11-20 | 4 | Yan Ming — CHIEF TECHNOLOGY OFFICER, Director | Option exercise (M): 1,981 · Tax withholding (F): 483 @ $5.53 · Option exercise (M): 7,363 · Tax withholding (F): 1,793 @ $5.53 · Option exercise (M): 5,525 · Tax withholding (F): 1,346 @ $5.53 · +6 more | EDGAR |
| 2025-11-20 | 4 | Barnett Valerie — CHIEF LEGAL OFFICER | Option exercise (M): 2,016 · Tax withholding (F): 649 @ $5.53 · Option exercise (M): 3,681 · Tax withholding (F): 1,184 @ $5.53 · Option exercise (M): 7,735 · Tax withholding (F): 2,487 @ $5.53 · +6 more | EDGAR |
| 2025-11-20 | 4 | Jiang Wenbin — PRESIDENT AND CEO, Director | Option exercise (M): 6,758 · Tax withholding (F): 2,660 @ $5.53 · Option exercise (M): 11,781 · Tax withholding (F): 4,636 @ $5.53 · Option exercise (M): 22,100 · Tax withholding (F): 8,697 @ $5.53 · +6 more | EDGAR |
| 2025-11-20 | 4 | Holder Michael — Director | Option exercise (M): 2,181 · Option exercise (M): 2,181 (derivative) @ $0 | EDGAR |
| 2025-11-20 | 4 | Chin Richard — Director | Option exercise (M): 6,107 · Option exercise (M): 6,107 (derivative) @ $0 | EDGAR |
| 2025-08-20 | 4 | Yan Ming — CHIEF TECHNOLOGY OFFICER, Director | Option exercise (M): 1,981 · Tax withholding (F): 588 @ $4.06 · Option exercise (M): 7,363 · Tax withholding (F): 2,184 @ $4.06 · Option exercise (M): 5,525 · Tax withholding (F): 1,498 @ $4.06 · +6 more | EDGAR |
| 2025-08-20 | 4 | Busque Philippe — SVP, GLOBAL SALES AND SERVICES | Option exercise (M): 1,536 · Tax withholding (F): 599 @ $4.06 · Option exercise (M): 2,210 · Tax withholding (F): 861 @ $4.06 · Option exercise (M): 3,625 · Tax withholding (F): 1,412 @ $4.06 · +3 more | EDGAR |
| 2025-08-20 | 4 | Barnett Valerie — CHIEF LEGAL OFFICER | Option exercise (M): 2,016 · Tax withholding (F): 786 @ $4.06 · Option exercise (M): 3,681 · Tax withholding (F): 1,434 @ $4.06 · Option exercise (M): 7,735 · Tax withholding (F): 3,000 @ $4.06 · +6 more | EDGAR |
| 2025-08-20 | 4 | Jiang Wenbin — PRESIDENT AND CEO, Director | Option exercise (M): 6,758 · Tax withholding (F): 1,646 @ $4.06 · Option exercise (M): 11,781 · Tax withholding (F): 2,869 @ $4.06 · Option exercise (M): 22,100 · Tax withholding (F): 5,382 @ $4.06 · +6 more | EDGAR |
| 2025-08-20 | 4 | McCombe William D. — Chief Financial Officer | Option exercise (M): 6,320 · Tax withholding (F): 2,462 @ $4.06 · Option exercise (M): 13,051 · Tax withholding (F): 5,084 @ $4.06 · Option exercise (M): 6,320 (derivative) @ $0 · Option exercise (M): 13,051 (derivative) @ $0 | EDGAR |
| 2025-08-20 | 4 | Holder Michael — Director | Option exercise (M): 2,181 @ $0 · Option exercise (M): 2,181 (derivative) @ $0 | EDGAR |
| 2025-08-20 | 4 | Chin Richard — Director | Option exercise (M): 4,071 · Option exercise (M): 4,071 (derivative) @ $0 | EDGAR |
| 2025-06-20 | 4 | Ball Jack — Director | Grant/award (A): 43,973 (derivative) @ $0 · Grant/award (A): 23,809 (derivative) @ $0 | EDGAR |
| 2025-06-20 | 4 | Imper Vera — Director | Grant/award (A): 43,973 (derivative) @ $0 · Grant/award (A): 23,809 (derivative) @ $0 | EDGAR |
| 2025-06-20 | 4 | Holder Michael — Director | Grant/award (A): 43,973 (derivative) @ $0 · Grant/award (A): 23,809 (derivative) @ $0 | EDGAR |
| 2025-06-20 | 4 | Chin Richard — Director | Grant/award (A): 73,289 (derivative) @ $0 · Grant/award (A): 39,062 (derivative) @ $0 | EDGAR |
Recent 8-K events — Cytek Biosciences, Inc.
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-08-05 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-07-15 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers | EDGAR |
| 2026-06-25 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers | EDGAR |
| 2026-06-16 | 8-K | 5.07 — Submission of Matters to a Vote of Security Holders | EDGAR |
| 2026-06-02 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers | EDGAR |
| 2026-05-07 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-02-26 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-01-13 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-11-05 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-08-06 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
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