SCULLY WILLIAM P purchased 68.5% of their position (215K shares) of PROTHENA CORP PUBLIC LTD CO on the open market
Open‑market purchase worth $1.82M — a major conviction buy. The strongest form of insider conviction signal.
P · 2 purchases
Filed: 10/9/2026ACC: 0001045463-26-000020
10% Owner
Since Dec 2024
+215K
Net shares
Net buyer
$1.82M
Total acquired
2
Open market trades
2B · 0S
2
Total transactions
215K acquired
Non-Derivative Transactions2
Ordinary Shares, par value $0.01 per share
Indirect
Shares
+125K
Price / share
$8.40
Trade value
$1.05M
% of position
39.8%
10/7/2026
314K→439K
Ordinary Shares, par value $0.01 per share
Indirect
Shares
+90K
Price / share
$8.57
Trade value
$770.90K
% of position
20.5%
10/8/2026
439K→529K
Total
Net shares
+215K
Net value
$1.82M
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Ordinary Shares, par value $0.01 per share Indirect | 10/7/2026 | P · Purchase | +125K | $8.40 | $1.05M | 39.8% | 314K | 439K |
| Ordinary Shares, par value $0.01 per share Indirect | 10/8/2026 | P · Purchase | +90K | $8.57 | $770.90K | 20.5% | 439K | 529K |
| Total | +215K | $1.82M | ||||||
Derivative Transactions0
No derivative transactions reported
Non-Derivative Holdings (Post-Transaction)2
Ordinary Shares, par value $0.01 per share
DirectShares owned927K
Ordinary Shares, par value $0.01 per share
IndirectShares owned187K
Total
927K direct·187K indirect1.11M
| Security Title | Shares Owned | Ownership Type |
|---|---|---|
| Ordinary Shares, par value $0.01 per share | 927K | Direct |
| Ordinary Shares, par value $0.01 per share | 187K | Indirect |
| Total | 1.11M | 927K direct·187K indirect |
Derivative Holdings (Post-Transaction)0
No derivative holdings reported