Karin L. Walker
Known title: Chief Accounting OfficerCIK: 0001559422
Associated companies
Transaction History
| PRTA | ▲ Buy | Option Exercise | 15,000 | — | 7/28/2026 | View on chart |
| PRTA | ▼ Sell | Other | 15,000 | $128K | 7/28/2026 | View on chart |
| PRTA | ▲ Buy | Grant | 25,000 | $0 | 7/28/2025 | View on chart |
| PRTA | ▲ Buy | Option Exercise | 5,000 | $68K | 1/24/2024 | View on chart |
| PRTA | ▼ Sell | Open Market | 5,000 | $170K | 1/24/2024 | View on chart |
| PRTA | ▼ Sell | Open Market | 3,322 | $124K | 12/20/2023 | View on chart |
| PRTA | ▲ Buy | Option Exercise | 5,000 | $68K | 12/20/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 1,678 | $62K | 12/20/2023 | View on chart |
| PRTA | ▲ Buy | Option Exercise | 5,000 | $68K | 11/30/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 5,000 | $170K | 11/30/2023 | View on chart |
| PRTA | ▲ Buy | Option Exercise | 5,000 | $68K | 10/25/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 1,789 | $72K | 10/25/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 2,917 | $121K | 10/25/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 294 | $12K | 10/25/2023 | View on chart |
| PRTA | ▲ Buy | Option Exercise | 5,000 | $75K | 9/19/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 5,000 | $262K | 9/19/2023 | View on chart |
| PRTA | ▲ Buy | Option Exercise | 5,000 | $75K | 8/18/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 5,000 | $286K | 8/18/2023 | View on chart |
| PRTA | ▲ Buy | Option Exercise | 5,000 | $75K | 7/19/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 3,966 | $273K | 7/19/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 1,034 | $72K | 7/19/2023 | View on chart |
| BGMS | ▲ Buy | Grant | 21,219 | $0 | 6/30/2023 | View on chart |
| PRTA | ▲ Buy | Option Exercise | 5,000 | $75K | 6/20/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 2,000 | $136K | 6/20/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 2,471 | $172K | 6/20/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 529 | $37K | 6/20/2023 | View on chart |
| PRTA | ▲ Buy | Option Exercise | 5,000 | $75K | 5/19/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 2,823 | $208K | 5/19/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 2,177 | $162K | 5/19/2023 | View on chart |
| PRTA | ▲ Buy | Option Exercise | 5,000 | $75K | 4/19/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 2,917 | $154K | 4/19/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 2,083 | $111K | 4/19/2023 | View on chart |
| PRTA | ▲ Buy | Option Exercise | 5,000 | $75K | 3/20/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 3,903 | $185K | 3/20/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 1,097 | $53K | 3/20/2023 | View on chart |
| PRTA | ▲ Buy | Option Exercise | 20,000 | $301K | 3/15/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 9,431 | $454K | 3/15/2023 | View on chart |
| PRTA | ▼ Sell | Open Market | 10,569 | $514K | 3/15/2023 | View on chart |
| PRTA | ▲ Buy | Option Exercise | 10,000 | $150K | 11/18/2022 | View on chart |
| PRTA | ▼ Sell | Open Market | 9,774 | $558K | 11/18/2022 | View on chart |
| PRTA | ▼ Sell | Open Market | 226 | $13K | 11/18/2022 | View on chart |
| PRTA | ▲ Buy | Option Exercise | 20,000 | $301K | 10/24/2022 | View on chart |
| PRTA | ▼ Sell | Open Market | 7,907 | $446K | 10/24/2022 | View on chart |
| PRTA | ▼ Sell | Open Market | 7,144 | $410K | 10/24/2022 | View on chart |
| PRTA | ▼ Sell | Open Market | 3,785 | $220K | 10/24/2022 | View on chart |
| PRTA | ▼ Sell | Open Market | 1,164 | $69K | 10/24/2022 | View on chart |
| BGMS | ▲ Buy | Grant | 15,822 | $0 | 6/14/2022 | View on chart |
| PRTA | ▲ Buy | Option Exercise | 4,519 | $68K | 11/23/2021 | View on chart |
| PRTA | ▼ Sell | Open Market | 2,700 | $155K | 11/23/2021 | View on chart |
| PRTA | ▼ Sell | Open Market | 1,819 | $106K | 11/23/2021 | View on chart |
| PRTA | ▲ Buy | Option Exercise | 3,000 | $89K | 10/20/2021 | View on chart |
| PRTA | ▼ Sell | Open Market | 19,115 | $1.1M | 10/20/2021 | View on chart |
| PRTA | ▼ Sell | Open Market | 1,700 | $104K | 10/20/2021 | View on chart |
| PRTA | ▼ Sell | Open Market | 2,185 | $135K | 10/20/2021 | View on chart |
| PRTA | ▲ Buy | Option Exercise | 20,000 | $301K | 10/20/2021 | View on chart |
AI Market Commentary
AI-generatedAll commentary →Synthesized from recent news and fundamentals/technical data -- not human analyst commentary or trader sentiment.
September 25, 2026
Prothena included in Alzheimer's Day stock watchlist
Prothena was featured in a Yahoo Finance article listing four Alzheimer's drug stocks to watch on World Alzheimer's Day. This inclusion highlights the company's relevance in the neurodegenerative disease sector. The stock is currently trading near its 52-week low, with technical indicators showing a rejection at support levels.
Prothena included in Alzheimer's Day stock watchlist. Prothena was featured in a Yahoo Finance article listing four Alzheimer's drug stocks to watch on World Alzheimer's Day. This inclusion highlights the company's relevance in the neurodegenerative disease sector. The stock is currently trading near its 52-week low, with technical indicators showing a rejection at support levels.