Prothena Corp Public Ltd Co
PRTAFigures shown here come from public SEC filings. Dates beside each section show the available history.
How Prothena Corp Public Ltd Co Makes Money
Follow each dollar of revenue through to what shareholders keep.
From revenue to net income
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Financial Summary
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SEC filings supply these figures; updates after the dates shown are not included. This page includes 15 annual periods. The latest annual period ends Dec 31, 2025. The latest insider filing shown is dated Jun 18, 2026. The latest institutional report shown is dated Mar 31, 2026; other ownership filings may exist.
Ownership
Who holds the shares, as reported in SEC ownership filings.
Reported 13F positions
Each row shows what a filer reported for one date, not a current position. The link opens that filing.
| Filer | Report date | Shares | Value | Filing |
|---|---|---|---|---|
| Birchview Capital, LP | 2026-03-31 | 449,019 | $4.36M | SEC filing |
| NORTHERN TRUST CORP | 2026-03-31 | 369,542 | $3.59M | SEC filing |
| RAYMOND JAMES FINANCIAL INC | 2026-03-31 | 11,884 | $116K | SEC filing |
| China Universal Asset Management Co., Ltd. | 2026-03-31 | 9,553 | $92.9K | SEC filing |
| JANE STREET GROUP, LLC | 2026-03-31 | 107,926 | $1.05M | SEC filing |
| Larson Financial Group LLC | 2026-03-31 | 167 | $1.62K | SEC filing |
| Duncan Williams Asset Management, LLC | 2026-03-31 | 70,281 | $683K | SEC filing |
| Creative Planning | 2026-03-31 | 72,986 | $709K | SEC filing |
| EverSource Wealth Advisors, LLC | 2026-03-31 | 160 | $1.56K | SEC filing |
| Sterling Capital Management LLC | 2026-03-31 | 1,348 | $13.1K | SEC filing |
| OSAIC HOLDINGS, INC. | 2026-03-31 | 372 | $3.61K | SEC filing |
| RHUMBLINE ADVISERS | 2026-03-31 | 55,367 | $538K | SEC filing |
| Virtus Investment Advisers, LLC | 2026-03-31 | 26,320 | $256K | SEC filing |
| Cresset Asset Management, LLC | 2026-03-31 | 10,000 | $97.2K | SEC filing |
| Focused Wealth Management, Inc | 2026-03-31 | 207,403 | $2.02M | SEC filing |
| PRUDENTIAL FINANCIAL INC | 2026-03-31 | 10,025 | $97.4K | SEC filing |
| SG Americas Securities, LLC | 2026-03-31 | 13,522 | Not shown | SEC filing |
| Connor, Clark & Lunn Investment Management Ltd. | 2026-03-31 | 156,551 | $1.52M | SEC filing |
| STATE STREET CORP | 2026-03-31 | 1,938,498 | $18.8M | SEC filing |
| US BANCORP \DE\ | 2026-03-31 | 418 | $4.06K | SEC filing |
- Each value is checked against Prothena Corp Public Ltd Co's share prices from within about three months of its report date (insiders' Form 4 trades and the latest close).
- Value not shown for 1 row: the filed value is about 1,000 times too small for the share count at Prothena Corp Public Ltd Co's share price.
120 filers have only one report here.
Unusually large insider trades
Each trade is compared with the other insider trades of the same kind in the same security among Prothena Corp Public Ltd Co's recent filings on file. Size alone is context, not a prediction or evidence of improper trading.
- 2026-06-11 · SCULLY WILLIAM P: Larger than all 10 other insider purchases of Ordinary Shares, par value $0.01 per share on file. SEC filing
- 2023-06-07 · Karp Carol D.: Larger than 77 of the 82 other insider sales of Ordinary Shares, par value $0.01 per share on file. SEC filing
- 2023-06-07 · Zago Wagner M.: Larger than 76 of the 82 other insider sales of Ordinary Shares, par value $0.01 per share on file. SEC filing
- 2023-05-17 · Kinney Gene G.: Larger than 79 of the 82 other insider sales of Ordinary Shares, par value $0.01 per share on file. SEC filing
- 2023-05-17 · Nguyen Tran: Larger than 81 of the 82 other insider sales of Ordinary Shares, par value $0.01 per share on file. SEC filing
- 2023-05-17 · Nguyen Tran: Larger than 78 of the 82 other insider sales of Ordinary Shares, par value $0.01 per share on file. SEC filing
- 2023-05-17 · Nguyen Tran: Larger than all 82 other insider sales of Ordinary Shares, par value $0.01 per share on file. SEC filing
- 2023-05-17 · Kinney Gene G.: Larger than 80 of the 82 other insider sales of Ordinary Shares, par value $0.01 per share on file. SEC filing
- 2023-05-17 · Kinney Gene G.: Larger than 75 of the 82 other insider sales of Ordinary Shares, par value $0.01 per share on file. SEC filing
- 2023-05-17 · Nguyen Tran: Larger than 74 of the 82 other insider sales of Ordinary Shares, par value $0.01 per share on file. SEC filing
Purchases & sales (open market or private)
| Security | Code | Price | Filing | |||
|---|---|---|---|---|---|---|
| 2026-06-16 | SCULLY WILLIAM P · 10% owner | Ordinary Shares, par value $0.01 per share | P — Open market or private purchase | +20,000 | 7.90 | SEC filing |
| 2026-06-11 | SCULLY WILLIAM P · 10% owner | Ordinary Shares, par value $0.01 per share | P — Open market or private purchase | +125,000 | 8.17 | SEC filing |
| 2026-06-04 | SCULLY WILLIAM P · 10% owner | Ordinary Shares, par value $0.01 per share | P — Open market or private purchase | +50,000 | 9.31 | SEC filing |
| 2026-06-02 | SCULLY WILLIAM P · 10% owner | Ordinary Shares, par value $0.01 per share | P — Open market or private purchase | +50,000 | 9.43 | SEC filing |
| 2026-05-22 | SCULLY WILLIAM P · 10% owner | Ordinary Shares, par value $0.01 per share | P — Open market or private purchase | +100,000 | 9.81 | SEC filing |
| 2025-05-06 | EcoR1 Capital, LLC · 10% owner | Ordinary Shares | S — Open market or private sale | −1,984,053 | 7.64 | SEC filing |
| 2025-05-05 | EcoR1 Capital, LLC · 10% owner | Ordinary Shares | S — Open market or private sale | −977,693 | 8.11 | SEC filing |
| 2025-05-02 | EcoR1 Capital, LLC · 10% owner | Ordinary Shares | S — Open market or private sale | −3,317,938 | 8.36 | SEC filing |
Showing 8 of 20 rows
Grants, exercises, tax & gifts
| Security | Code | Filing | |||
|---|---|---|---|---|---|
| 2026-06-15 | SCULLY WILLIAM P · 10% owner | Ordinary Shares, par value $0.01 per share | G — Bona fide gift | −325,000 | SEC filing |
| 2026-05-15 | Dunn William H. Jr. · Director | Stock Option (Right to Buy) | A — Grant, award, or other acquisition | +27,000 | SEC filing |
| 2026-05-15 | COLLIER RICHARD T · Director | Stock Option (Right to Buy) | A — Grant, award, or other acquisition | +27,000 | SEC filing |
| 2026-05-15 | Selkoe Dennis J. · Director | Stock Option (Right to Buy) | A — Grant, award, or other acquisition | +27,000 | SEC filing |
| 2026-05-15 | Ekman Lars · Director | Stock Option (Right to Buy) | A — Grant, award, or other acquisition | +27,000 | SEC filing |
| 2026-05-15 | Cooke Shane · Director | Stock Option (Right to Buy) | A — Grant, award, or other acquisition | +27,000 | SEC filing |
| 2026-05-15 | WELCH DANIEL G · Director | Stock Option (Right to Buy) | A — Grant, award, or other acquisition | +27,000 | SEC filing |
| 2026-04-10 | Kingston Anne Evans · Chief Strategy Officer | Stock Option (Right to Buy) | A — Grant, award, or other acquisition | +100,000 | SEC filing |
Showing 8 of 28 rows
Other activity
| Security | Code | Filing | |||
|---|---|---|---|---|---|
| 2020-04-08 | Nguyen Tran · Chief Strategy Officer and CFO | Ordinary Shares, par value $0.01 per share | J — Other acquisition or disposition | −995 | SEC filing |
Showing 1 of 1 rows
These tables describe filed transactions, not current holdings. Prices are shown as filed; a currency is added only when the filing's data names one. Amended and possible duplicate rows are left out of size comparisons and transaction groups.