Ball Jack (CIK 1873083) reported 2 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-06-12). Recent activity: Buy CTKB (43,973 shares), Buy CTKB (15,706 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-12 | Cytek Biosciences, Inc. (CTKB) | Director | Buy | 43,973 | $0 |
| 2025-06-09 | Cytek Biosciences, Inc. (CTKB) | Director | Buy | 15,706 | $0 |
Source: SEC Form 4 filings · as of 2026-06-12