CYTEK BIOSCIENCES INC (CTKB) — insider trading
Health Care · NASDAQ
CYTEK BIOSCIENCES INC (CTKB) has 35 reported SEC Form 4 insider transactions in our data (latest 2026-06-12).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-06-12 | Yan Ming | Director, Officer (CHIEF TECHNOLOGY OFFICER) | Bona fide gift | 135,892 | $0.00 | $0 | Form 4 |
| 2026-06-10 | Holder Michael | Director | Option exercise / conversion (derivative) | 43,973 | $0.00 | $0 | Form 4 |
| 2026-06-10 | Holder Michael | Director | Grant / award / vesting (derivative) | 18,261 | $0.00 | $0 | Form 4 |
| 2026-06-10 | Holder Michael | Director | Grant / award / vesting (derivative) | 33,333 | $0.00 | $0 | Form 4 |
| 2026-06-10 | Holder Michael | Director | Option exercise / conversion | 43,973 | — | — | Form 4 |
| 2026-06-10 | NEFF DEBORAH J | Director | Option exercise / conversion (derivative) | 43,973 | $0.00 | $0 | Form 4 |
| 2026-06-10 | NEFF DEBORAH J | Director | Grant / award / vesting (derivative) | 18,261 | $0.00 | $0 | Form 4 |
| 2026-06-10 | NEFF DEBORAH J | Director | Grant / award / vesting (derivative) | 33,333 | $0.00 | $0 | Form 4 |
| 2026-06-10 | NEFF DEBORAH J | Director | Option exercise / conversion | 43,973 | — | — | Form 4 |
| 2026-06-10 | Imper Vera | Director | Option exercise / conversion (derivative) | 43,973 | $0.00 | $0 | Form 4 |
| 2026-06-10 | Imper Vera | Director | Grant / award / vesting (derivative) | 18,261 | $0.00 | $0 | Form 4 |
| 2026-06-10 | Imper Vera | Director | Grant / award / vesting (derivative) | 33,333 | $0.00 | $0 | Form 4 |
| 2026-06-10 | Imper Vera | Director | Option exercise / conversion | 43,973 | — | — | Form 4 |
| 2026-06-10 | Chin Richard | Director | Grant / award / vesting (derivative) | 18,261 | $0.00 | $0 | Form 4 |
| 2026-06-10 | Chin Richard | Director | Grant / award / vesting (derivative) | 33,333 | $0.00 | $0 | Form 4 |
| 2026-06-10 | MUIR GLENN P | Director | Grant / award / vesting (derivative) | 29,835 | $0.00 | $0 | Form 4 |
| 2026-06-10 | MUIR GLENN P | Director | Grant / award / vesting (derivative) | 55,555 | $0.00 | $0 | Form 4 |
| 2026-06-10 | Ball Jack | Director | Option exercise / conversion (derivative) | 43,973 | $0.00 | $0 | Form 4 |
| 2026-06-10 | Ball Jack | Director | Option exercise / conversion | 43,973 | — | — | Form 4 |
| 2026-05-18 | Yan Ming | Director, Officer (CHIEF TECHNOLOGY OFFICER) | Option exercise / conversion (derivative) | 9,480 | $0.00 | $0 | Form 4 |
| 2026-05-18 | Yan Ming | Director, Officer (CHIEF TECHNOLOGY OFFICER) | Option exercise / conversion (derivative) | 4,108 | $0.00 | $0 | Form 4 |
| 2026-05-18 | Yan Ming | Director, Officer (CHIEF TECHNOLOGY OFFICER) | Option exercise / conversion (derivative) | 3,683 | $0.00 | $0 | Form 4 |
| 2026-05-18 | Yan Ming | Director, Officer (CHIEF TECHNOLOGY OFFICER) | Option exercise / conversion (derivative) | 4,908 | $0.00 | $0 | Form 4 |
| 2026-05-18 | Yan Ming | Director, Officer (CHIEF TECHNOLOGY OFFICER) | Shares withheld for taxes / exercise cost | 2,364 | $3.55 | $8.4K | Form 4 |
| 2026-05-18 | Yan Ming | Director, Officer (CHIEF TECHNOLOGY OFFICER) | Option exercise / conversion | 9,480 | — | — | Form 4 |
| 2026-05-18 | Yan Ming | Director, Officer (CHIEF TECHNOLOGY OFFICER) | Shares withheld for taxes / exercise cost | 1,025 | $3.55 | $3.6K | Form 4 |
| 2026-05-18 | Yan Ming | Director, Officer (CHIEF TECHNOLOGY OFFICER) | Option exercise / conversion | 4,108 | — | — | Form 4 |
| 2026-05-18 | Yan Ming | Director, Officer (CHIEF TECHNOLOGY OFFICER) | Shares withheld for taxes / exercise cost | 919 | $3.55 | $3.3K | Form 4 |
| 2026-05-18 | Yan Ming | Director, Officer (CHIEF TECHNOLOGY OFFICER) | Option exercise / conversion | 3,683 | — | — | Form 4 |
| 2026-05-18 | Yan Ming | Director, Officer (CHIEF TECHNOLOGY OFFICER) | Shares withheld for taxes / exercise cost | 1,224 | $3.55 | $4.3K | Form 4 |
| 2026-05-18 | Yan Ming | Director, Officer (CHIEF TECHNOLOGY OFFICER) | Option exercise / conversion | 4,908 | — | — | Form 4 |
| 2026-05-18 | Chin Richard | Director | Option exercise / conversion (derivative) | 6,107 | $0.00 | $0 | Form 4 |
| 2026-05-18 | Chin Richard | Director | Option exercise / conversion | 6,107 | — | — | Form 4 |
| 2026-05-18 | Holder Michael | Director | Option exercise / conversion (derivative) | 1,454 | $0.00 | $0 | Form 4 |
| 2026-05-18 | Holder Michael | Director | Option exercise / conversion | 1,454 | — | — | Form 4 |
Ask the chat about CTKB's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: CYTEK BIOSCIENCES INC (CTKB).
Last updated 2026-06-12 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.