Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 3 years
- Director since
- 2023
3 years of board service in total across 1 board, counting each seat separately. Longest: MaxCyte Inc., 3 years.
MaxCyte Inc.
Director
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Jun 17, 2026 | MaxCyte Inc. | Grant or award | +30,421 | — | — |
| Jun 18, 2025 | MaxCyte Inc. | Grant or award | +29,210 | — | — |
| Jan 27, 2025 | MaxCyte Inc. | Option exercise | +3,000 | $2.93 | $8,790 |
| Jan 27, 2025 | MaxCyte Inc. | Open-market sale | −3,000 | $4.65 | $13,950 |
| Dec 26, 2024 | MaxCyte Inc. | Option exercise | +3,000 | $2.93 | $8,790 |
| Dec 26, 2024 | MaxCyte Inc. | Open-market sale | −3,000 | $4.01 | $12,030 |
| Dec 9, 2024 | MaxCyte Inc. | Option exercise | +891 | $2.93 | $2,611 |
| Dec 9, 2024 | MaxCyte Inc. | Option exercise | +1,121 | $1.64 | $1,838 |
| Dec 9, 2024 | MaxCyte Inc. | Option exercise | +483 | $2.93 | $1,415 |
| Dec 9, 2024 | MaxCyte Inc. | Open-market sale | −2,495 | $3.79 | $9,456 |
| Dec 6, 2024 | MaxCyte Inc. | Option exercise | +505 | $2.93 | $1,480 |
| Dec 6, 2024 | MaxCyte Inc. | Open-market sale | −505 | $3.70 | $1,869 |
| Oct 28, 2024 | MaxCyte Inc. | Option exercise | +3,000 | $2.93 | $8,790 |
| Oct 28, 2024 | MaxCyte Inc. | Open-market sale | −3,000 | $3.72 | $11,160 |
| Sep 26, 2024 | MaxCyte Inc. | Option exercise | +3,000 | $2.93 | $8,790 |
Questions about John Joseph Johnston
What boards is John Joseph Johnston on?
John Joseph Johnston sits on the board of MaxCyte Inc.
How long has John Joseph Johnston served on boards?
Our records show at least 3 years of board service across 1 board, the earliest from 2023.
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