Updated Jul 16, 2026
Holder Michael has filed 3 SEC Form 4 filings across 2 companies in the last 90 days.

| Role | Insider |
|---|---|
| Notability | 30/100 |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-06-12 | CTKB | Cytek Biosciences, Inc. | M — Option exercise | 44.0K | — | |
| 2026-05-20 | CTKB | Cytek Biosciences, Inc. | M — Option exercise | 1.5K | — | |
| 2026-03-12 | CTKB | Cytek Biosciences, Inc. | M — Option exercise | 2.9K | — | |
| 2025-08-18 | CTKB | Cytek Biosciences, Inc. | M — Option exercise | 2.2K | $0.00 | |
| 2024-11-20 | CTKB | Cytek Biosciences, Inc. | M — Option exercise | 2.2K | — |
Holder Michael is a corporate insider — currently tracked as Insider of Cytek Biosciences, Inc. (CTKB). InsiderAlpha tracks every SEC Form 4 filing in real time.
3 primary Form 4 filings in the last 90 days, covering 2 companies.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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