Who
Karin L. Walker
Chief Accounting Officer
Company insider
Files Form 4 as: Chief Accounting Officer, Prothena Corporation; Director, Bio Green Med Solution; VP, Finance & CAO, Affymax.
In numbers
- Trades disclosed
- 183
- Buys
- 0
- Sells
- 30
- Bought
- $0
- Sold
- $10.1M
- Companies
- 3
- Companies where not an officer
- 1
- First trade
- 2 Oct 2012
- Last trade
- 28 Jul 2026
- Last filed
- 30 Jul 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 28 Jul 2026filed 30 Jul 2026 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Code M | —15,000 | filing |
| 28 Jul 2026filed 30 Jul 2026 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Code D | $128K15,000 at $8.56 | filing |
| 28 Jul 2026filed 30 Jul 2026 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code M | —15,000 at $0.00 | filing |
| 28 Jul 2026filed 30 Jul 2026 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code M | —15,000 at $0.00 | filing |
| 28 Jul 2026filed 30 Jul 2026 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Code M | —15,000 | filing |
| 28 Jul 2026filed 30 Jul 2026 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Code D | $128K15,000 at $8.56 | filing |
| 3 Mar 2026filed 5 Mar 2026 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code A | —150,000 at $0.00 | filing |
| 3 Mar 2026filed 5 Mar 2026 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code A | —150,000 at $0.00 | filing |
| 28 Jul 2025filed 30 Jul 2025 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Code A | —25,000 at $0.00 | filing |
| 5 Mar 2025filed 7 Mar 2025 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code A | —70,000 at $0.00 | filing |
| 27 Feb 2024filed 29 Feb 2024 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code A | —54,000 at $0.00 | filing |
| 24 Jan 2024filed 24 Jan 2024 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code M | —5,000 at $0.00 | filing |
| 24 Jan 2024filed 24 Jan 2024 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Code M | $68K5,000 at $13.53 | filing |
| 24 Jan 2024filed 24 Jan 2024 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Sold | $170K5,000 at $34.00 | filing |
| 20 Dec 2023filed 20 Dec 2023 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code M | —5,000 at $0.00 | filing |
| 20 Dec 2023filed 20 Dec 2023 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Code M | $68K5,000 at $13.53 | filing |
| 20 Dec 2023filed 20 Dec 2023 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Sold | $62K1,678 at $36.68 | filing |
| 20 Dec 2023filed 20 Dec 2023 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Sold | $124K3,322 at $37.45 | filing |
| 30 Nov 2023filed 30 Nov 2023 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code M | —5,000 at $0.00 | filing |
| 30 Nov 2023filed 30 Nov 2023 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Code M | $68K5,000 at $13.53 | filing |
News
Prothena Corporation plc (PRTA) – What Are Analysts Saying About This Stock?PRTA · dailypolitical.com · 20 Oct 2026Prothena (NASDAQ:PRTA) Major Shareholder William Scully Buys 100,000 Shares of Company StockPRTA · dailypolitical.com · 15 Oct 2026Prothena (NASDAQ:PRTA) vs. Kyntra Bio (NASDAQ:KYNB) Financial ReviewPRTA · dailypolitical.com · 12 Oct 2026
0 headlines in the last 90 days name Karin L. Walker; 3 articles from the last 14 days about the 1 company they traded most, at most three about any one of them.