SCULLY WILLIAM P purchased 12.1% of their position (100K shares) of PROTHENA CORP PUBLIC LTD CO on the open market
Open‑market purchase worth $843.5K — a moderate purchase. The strongest form of insider conviction signal.
P · 1 purchase
Filed: 9/21/2026ACC: 0001045463-26-000016
10% Owner
Since Dec 2024
+100K
Net shares
Net buyer
$843.5K
Total acquired
1
Open market trades
1B · 0S
1
Total transactions
100K acquired
Non-Derivative Transactions1
Ordinary Shares, par value $0.01 per share
Direct
Shares
+100K
Price / share
$8.43
Trade value
$843.46K
% of position
12.1%
9/18/2026
827K→927K
Total
Net shares
+100K
Net value
$843.46K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Ordinary Shares, par value $0.01 per share Direct | 9/18/2026 | P · Purchase | +100K | $8.43 | $843.46K | 12.1% | 827K | 927K |
| Total | +100K | $843.46K | ||||||
Derivative Transactions0
No derivative transactions reported
Non-Derivative Holdings (Post-Transaction)2
Ordinary Shares, par value $0.01 per share
IndirectShares owned52K
Ordinary Shares, par value $0.01 per share
IndirectShares owned83.50K
Total
135.50K indirect135.50K
| Security Title | Shares Owned | Ownership Type |
|---|---|---|
| Ordinary Shares, par value $0.01 per share | 52K | Indirect |
| Ordinary Shares, par value $0.01 per share | 83.50K | Indirect |
| Total | 135.50K | 135.50K indirect |
Derivative Holdings (Post-Transaction)0
No derivative holdings reported