PRTA Smart Money
Prothena Corporation plc
1W: +3.6%
1M: +1.0%
3M: +2.9%
YTD: -4.2%
1Y: -10.3%
3Y: -79.9%
5Y: -85.9%
$8.81
+0.41 (+4.88%)
After Hours: $8.75 (-0.06, -0.68%)
Weekly Expected Move ±6.8%
$7
$8
$8
$9
$9
Credit Risk of going bust: lower than 83% of companies Debt: 1.6% of company value Bonds: none of note held by US funds details ▾
If the stock fell to about $0.01 (down 99.9%), Prothena Corporation plc would be worth roughly what it owes.
Total debt $7.0M against a stock market value of $431.2M.
Distance to default 10.45 (Merton model): prices to 2026-10-26, balance sheet 2026-06-30, debt counted $3.0M (short-term plus half of long-term), stock volatility 47.4%; Altman Z'' 9.96. A ranking and a back-test, not a forecast.
US fund filings (SEC N-PORT) show under $25M of this company's bonds, so there is no bond page. Its debt may be bank loans or privately placed. How these are computed.
Total debt $7.0M against a stock market value of $431.2M.
Distance to default 10.45 (Merton model): prices to 2026-10-26, balance sheet 2026-06-30, debt counted $3.0M (short-term plus half of long-term), stock volatility 47.4%; Altman Z'' 9.96. A ranking and a back-test, not a forecast.
US fund filings (SEC N-PORT) show under $25M of this company's bonds, so there is no bond page. Its debt may be bank loans or privately placed. How these are computed.
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👔 Insider Trades
25 records| Date | Name | Title | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-10-23 | SCULLY WILLIAM P | 10% owner | P-Purchase | 50,000 | $8.07 | $404K | Filing |
| 2026-10-22 | SCULLY WILLIAM P | 10% owner | P-Purchase | 100,000 | $8.19 | $819K | Filing |
| 2026-10-14 | SCULLY WILLIAM P | 10% owner | P-Purchase | 10,000 | $8.46 | $85K | Filing |
| 2026-10-13 | SCULLY WILLIAM P | 10% owner | P-Purchase | 100,000 | $8.35 | $835K | Filing |
| 2026-10-08 | SCULLY WILLIAM P | 10% owner | P-Purchase | 90,000 | $8.57 | $771K | Filing |
| 2026-10-07 | SCULLY WILLIAM P | 10% owner | P-Purchase | 125,000 | $8.40 | $1.1M | Filing |
| 2026-10-02 | SCULLY WILLIAM P | 10% owner | P-Purchase | 100,000 | $8.57 | $857K | Filing |
| 2026-09-29 | SCULLY WILLIAM P | 10% owner | P-Purchase | 162,000 | $8.68 | $1.4M | Filing |
| 2026-09-28 | SCULLY WILLIAM P | 10% owner | P-Purchase | 103,500 | $8.60 | $890K | Filing |
| 2026-09-18 | SCULLY WILLIAM P | 10% owner | P-Purchase | 100,000 | $8.43 | $843K | Filing |
| 2026-09-02 | SCULLY WILLIAM P | 10% owner | P-Purchase | 27,000 | $9.47 | $256K | Filing |
| 2026-08-20 | SCULLY WILLIAM P | 10% owner | P-Purchase | 50,000 | $8.79 | $439K | Filing |
| 2026-08-18 | SCULLY WILLIAM P | 10% owner | G-Gift | 627,553 | $— | $0 | Filing |
| 2026-08-17 | SCULLY WILLIAM P | 10% owner | G-Gift | 336,000 | $— | $0 | Filing |
| 2026-08-10 | SCULLY WILLIAM P | 10% owner | G-Gift | 251,553 | $— | $0 | Filing |
| 2026-08-07 | SCULLY WILLIAM P | 10% owner | P-Purchase | 3,500 | $8.62 | $30K | Filing |
| 2026-08-07 | SCULLY WILLIAM P | 10% owner | P-Purchase | 34,000 | $8.62 | $293K | Filing |
| 2026-07-29 | Isaacs Michael John | officer: general counsel & company sec. | S-Sale | 8,386 | $8.47 | $71K | Filing |
| 2026-07-29 | Kingston Anne Evans | officer: chief strategy officer | S-Sale | 7,662 | $8.47 | $65K | Filing |
| 2026-07-28 | Swanson Chad J. | officer: chief development officer | F-Tax Withholding | 3,467 | $8.56 | $30K | Filing |
| 2026-07-28 | Isaacs Michael John | officer: general counsel & company sec. | F-Tax Withholding | 4,694 | $8.56 | $40K | Filing |
| 2026-07-28 | Kingston Anne Evans | officer: chief strategy officer | F-Tax Withholding | 3,498 | $8.56 | $30K | Filing |
| 2026-07-28 | Smith Brandon S. | officer: chief operating officer | D-Sale to Issuer | 78,000 | $8.56 | $668K | Filing |
| 2026-07-28 | Swanson Chad J. | officer: chief development officer | D-Sale to Issuer | 40,800 | $8.56 | $349K | Filing |
| 2026-07-28 | Walker Karin L | officer: chief accounting officer | D-Sale to Issuer | 15,000 | $8.56 | $128K | Filing |
🏛️ Congressional Trades
0 records| Date | Politician | Chamber | Type | Amount | Filing |
|---|---|---|---|---|---|
| No congressional trades found | |||||
🏦 Top Institutional Holders
0 holders| Holder | Shares | Value | Date Reported | Filing | |
|---|---|---|---|---|---|
| No institutional holdings found | |||||