SCULLY WILLIAM P purchased 14.5% of their position (150K shares) of PROTHENA CORP PUBLIC LTD CO on the open market
Open‑market purchase worth $1.22M — a moderate purchase. The strongest form of insider conviction signal.
P · 2 purchases
Filed: 10/26/2026ACC: 0001045463-26-000022
10% Owner
Since Dec 2024
+150K
Net shares
Net buyer
$1.22M
Total acquired
2
Open market trades
2B · 0S
2
Total transactions
150K acquired
Non-Derivative Transactions2
Ordinary Shares, par value $0.01 per share
Direct
Shares
+100K
Price / share
$8.19
Trade value
$818.52K
% of position
9.6%
10/22/2026
1.04M→1.14M
Ordinary Shares, par value $0.01 per share
Direct
Shares
+50K
Price / share
$8.07
Trade value
$403.52K
% of position
4.4%
10/23/2026
1.14M→1.19M
Total
Net shares
+150K
Net value
$1.22M
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Ordinary Shares, par value $0.01 per share Direct | 10/22/2026 | P · Purchase | +100K | $8.19 | $818.52K | 9.6% | 1.04M | 1.14M |
| Ordinary Shares, par value $0.01 per share Direct | 10/23/2026 | P · Purchase | +50K | $8.07 | $403.52K | 4.4% | 1.14M | 1.19M |
| Total | +150K | $1.22M | ||||||
Derivative Transactions0
No derivative transactions reported
Non-Derivative Holdings (Post-Transaction)2
Ordinary Shares, par value $0.01 per share
IndirectShares owned529K
Ordinary Shares, par value $0.01 per share
IndirectShares owned187K
Total
716K indirect716K
| Security Title | Shares Owned | Ownership Type |
|---|---|---|
| Ordinary Shares, par value $0.01 per share | 529K | Indirect |
| Ordinary Shares, par value $0.01 per share | 187K | Indirect |
| Total | 716K | 716K indirect |
Derivative Holdings (Post-Transaction)0
No derivative holdings reported