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: Bio Green Med Solution Inc., 3 years.
Bio Green Med Solution 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 |
|---|---|---|---|---|---|
| Jul 28, 2026 | Prothena Corporation plc | Option exercise | +15,000 | — | — |
| Jul 28, 2026 | Prothena Corporation plc | Sold back to the company | −15,000 | $8.56 | $128,400 |
| Jul 28, 2025 | Prothena Corporation plc | Grant or award | +25,000 | — | — |
| Jan 24, 2024 | Prothena Corporation plc | Option exercise | +5,000 | $13.53 | $67,650 |
| Jan 24, 2024 | Prothena Corporation plc | Open-market sale | −5,000 | $34.00 | $170,000 |
| Dec 20, 2023 | Prothena Corporation plc | Option exercise | +5,000 | $13.53 | $67,650 |
| Dec 20, 2023 | Prothena Corporation plc | Open-market sale | −1,678 | $36.68 | $61,549 |
| Dec 20, 2023 | Prothena Corporation plc | Open-market sale | −3,322 | $37.45 | $124,409 |
| Nov 30, 2023 | Prothena Corporation plc | Option exercise | +5,000 | $13.53 | $67,650 |
| Nov 30, 2023 | Prothena Corporation plc | Open-market sale | −5,000 | $34.00 | $170,000 |
| Oct 25, 2023 | Prothena Corporation plc | Option exercise | +5,000 | $13.53 | $67,650 |
| Oct 25, 2023 | Prothena Corporation plc | Open-market sale | −1,789 | $40.27 | $72,043 |
| Oct 25, 2023 | Prothena Corporation plc | Open-market sale | −2,917 | $41.38 | $120,705 |
| Oct 25, 2023 | Prothena Corporation plc | Open-market sale | −294 | $42.28 | $12,430 |
| Sep 19, 2023 | Prothena Corporation plc | Option exercise | +5,000 | $15.04 | $75,200 |
Questions about Karin L. Walker
What boards is Karin L. Walker on?
Karin L. Walker sits on the board of Bio Green Med Solution Inc.
How long has Karin L. Walker served on boards?
Our records show at least 3 years of board service across 1 board, the earliest from 2023.
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