Who
Brandon S. Smith
Chief Operating Officer
Company insider
Files Form 4 as: Chief Operating Officer, Prothena Corporation.
In numbers
- Trades disclosed
- 39
- Buys
- 0
- Sells
- 5
- Bought
- $0
- Sold
- $1.3M
- Companies
- 1
- Companies where not an officer
- 0
- First trade
- 2 Mar 2020
- 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 | —78,000 | filing |
| 28 Jul 2026filed 30 Jul 2026 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Code D | $668K78,000 at $8.56 | filing |
| 28 Jul 2026filed 30 Jul 2026 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code M | —78,000 at $0.00 | filing |
| 28 Jul 2026filed 30 Jul 2026 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code M | —78,000 at $0.00 | filing |
| 28 Jul 2026filed 30 Jul 2026 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Code M | —78,000 | filing |
| 28 Jul 2026filed 30 Jul 2026 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Code D | $668K78,000 at $8.56 | filing |
| 3 Mar 2026filed 5 Mar 2026 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code A | —190,000 at $0.00 | filing |
| 3 Mar 2026filed 5 Mar 2026 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code A | —190,000 at $0.00 | filing |
| 28 Jul 2025filed 30 Jul 2025 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Code A | —130,000 at $0.00 | filing |
| 5 Mar 2025filed 7 Mar 2025 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code A | —107,500 at $0.00 | filing |
| 27 Feb 2024filed 29 Feb 2024 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code A | —85,000 at $0.00 | filing |
| 11 Oct 2023filed 11 Oct 2023 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code M | —4,000 at $0.00 | filing |
| 11 Oct 2023filed 11 Oct 2023 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Code M | $44K4,000 at $11.12 | filing |
| 11 Oct 2023filed 11 Oct 2023 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Sold | $166K3,556 at $46.62 | filing |
| 11 Oct 2023filed 11 Oct 2023 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Sold | $21K444 at $47.74 | filing |
| 13 Sep 2023filed 13 Sep 2023 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code M | —4,000 at $0.00 | filing |
| 13 Sep 2023filed 13 Sep 2023 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Code M | $44K4,000 at $11.12 | filing |
| 13 Sep 2023filed 13 Sep 2023 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Sold | $216K3,886 at $55.48 | filing |
| 13 Sep 2023filed 13 Sep 2023 | PRTA Prothena CorporationBiotechnology | SEC FORM 4 Sold | $6,379114 at $55.96 | filing |
| 16 Aug 2023filed 16 Aug 2023 | PRTA Prothena Corporationoption or derivative · Biotechnology | SEC FORM 4 Code M | —4,000 at $0.00 | 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 Brandon S. Smith; 3 articles from the last 14 days about the 1 company they traded most, at most three about any one of them.