Form 4: Prothena Corp Public Ltd Executive Reports Stock Transaction
Insider Transaction (Form 4)
Chad J. Swanson, Chief Development Officer of Prothena Corp Public Ltd Co, reported multiple transactions in common stock on July 28, 2026.
Summary
- Option exercise/conversion: acquired 51,000 Ordinary Shares, par value $0.01 per share on July 28, 2026; holds 85,000 after (Direct).
- Disposition to the issuer: disposed of 40,800 Ordinary Shares, par value $0.01 per share at $8.56 ($349,248) on July 28, 2026; holds 44,200 after (Direct).
- Tax/exercise-price withholding: disposed of 3,467 Ordinary Shares, par value $0.01 per share at $8.56 ($29,678) on July 28, 2026; holds 40,733 after (Direct).
- Option exercise/conversion: disposed of 51,000 Restricted Stock Units on July 28, 2026 (Direct).
Sentiment
Score: 5
Explanation: StockSavvy.ai views this as routine: the reported changes are grants, option exercises, tax withholding or similar administrative transactions, which carry limited directional signal.
Insider Transactions
Chad J. Swanson — Officer (Chief Development Officer)
| Date | Transaction | Security | Shares | Price | Value | Held After |
|---|---|---|---|---|---|---|
| 2026-07-28 | Option exercise/conversion | Ordinary Shares, par value $0.01 per share | 51,000 | — | — | 85,000 |
| 2026-07-28 | Disposition to the issuer | Ordinary Shares, par value $0.01 per share | 40,800 | $9 | $349.2K | 44,200 |
| 2026-07-28 | Tax/exercise-price withholding | Ordinary Shares, par value $0.01 per share | 3,467 | $9 | $29.7K | 40,733 |
| 2026-07-28 | Option exercise/conversion | Restricted Stock Units | 51,000 | — | — | 0 |
Key Dates
| Date | Description |
|---|---|
| 2026-07-28 | Option exercise/conversion (51,000 shares) |
| 2026-07-28 | Disposition to the issuer (40,800 shares) |
| 2026-07-28 | Tax/exercise-price withholding (3,467 shares) |
| 2026-07-28 | Option exercise/conversion (51,000 shares) |
Keywords
insider transaction, Form 4, PRTA, PROTHENA CORP PUBLIC LTD CO, neutral, Chad J. Swanson
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