Company profile
Prothena Corp Public Ltd Co Insider Trading
PRTAEvery SEC Form 4 insider trading filing for Prothena Corp Public Ltd Co (PRTA) since April 2023 — open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC. Why 2023?
- Exchange
- Nasdaq
- Sector
- Pharmaceutical Preparations
- CIK
- 0001559053
- Filings
- 124
- Insiders
- 23
- Last filing
- 2026-08-20
Activity summary
Recent insider activity is bullish. Over the last 30 days, 15 insiders purchased shares versus 9 sales. Buying was led by Scully William P.
Three year balance
Buy and sell value by quarter, Q2 23 to Q3 26. Prothena Corp Public Ltd Co insiders are net sellers across the period shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $50.8M.
90 day insight
Over the last 90 days, Prothena Corp Public Ltd Co insiders bought $2.9M (19 transactions) and sold $2.9M (9 transactions).
- Most active insider: Scully William P with 11 transactions totaling $2.9M.
- Largest single purchase: $1.0M by Scully William P on Jun 11, 2026.
- 18% of recent sales were pre-scheduled 10b5-1 trades — typically less informative than open-market activity.
Activity skews bullish — buys outpace sales.
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 20, 2026 | Scully William P | PRTA | Purchase | 50,000 | $8.79 | $439K |
| Aug 18, 2026 | Scully William P | PRTA | Gift | 627,553 | — | — |
| Aug 17, 2026 | Scully William P | PRTA | Gift | 336,000 | — | — |
| Aug 10, 2026 | Scully William P | PRTA | Gift | 251,553 | — | — |
| Aug 7, 2026 | Scully William P | PRTA | Purchase | 34,000 | $8.62 | $293K |
45 more transactions hidden
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By total value filed.