Johnston John Joseph (CIK 1874850) reported 4 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-06-22). Recent activity: Buy MXCT (30,421 shares), Buy MXCT (29,210 shares), Buy MXCT (3,000 shares), Sell MXCT (3,000 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-22 | MAXCYTE, INC. (MXCT) | Director | Buy | 30,421 | $0 |
| 2025-06-23 | MAXCYTE, INC. (MXCT) | Director | Buy | 29,210 | $0 |
| 2025-01-29 | MAXCYTE, INC. (MXCT) | Director | Buy | 3,000 | $8,790 |
| 2025-01-29 | MAXCYTE, INC. (MXCT) | Director | Sell | 3,000 | $13,950 |
Source: SEC Form 4 filings · as of 2026-06-22