Insiders / McCombe William D.
McCombe William D.
CIK 1878824personinsider
Companies
1
First seen
Mar 12, 2026
Last activity
Mar 12, 2026
Companies
| Company | Shares held | Latest |
|---|---|---|
| Cytek Biosciences, Inc. · CTKB | 94,687 | — |
All securities held
3 positions · latest reported per filing
| Company | Security | Shares |
|---|---|---|
| Cytek Biosciences, Inc. | Common Stock | 94,687 |
| Cytek Biosciences, Inc. | Restricted Stock UnitsDerivative | 156,613 |
| Cytek Biosciences, Inc. | Employee Stock Option (right to buy)Derivative | 136,205 |
Activity
InsidersInstitutions
This person's insider trades (Form 4), across every company.| Date | Action | Company | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|
| Mar 10, 2026 | Other | CTKB Cytek Biosciences, Inc. Common Stock | $30.2K | -7K -7.02% | 94,687 0.07% of shares | low |
| Mar 10, 2026 | Other | CTKB Cytek Biosciences, Inc. Common Stock | $11.0K | -3K -2.99% | 84,431 0.06% of shares | low |
| Mar 10, 2026 | Exercise | CTKB Cytek Biosciences, Inc. Restricted Stock Units | — | -17K -10.00% | 156,613 0.12% of shares | low |
| Mar 10, 2026 | Exercise | CTKB Cytek Biosciences, Inc. Restricted Stock Units | — | -6K -10.00% | 56,889 0.04% of shares | low |
| Mar 10, 2026 | Grant | CTKB Cytek Biosciences, Inc. Restricted Stock Units | — | +257K | 256,790 0.20% of shares | low |
| Mar 10, 2026 | Grant | CTKB Cytek Biosciences, Inc. Employee Stock Option (right to buy) | — | +136K | 136,205 0.10% of shares | low |
| Mar 10, 2026 | Exercise | CTKB Cytek Biosciences, Inc. Common Stock | — | +17K +20.61% | 101,832 0.08% of shares | low |
| Mar 10, 2026 | Exercise | CTKB Cytek Biosciences, Inc. Common Stock | — | +6K +7.83% | 87,034 0.07% of shares | low |