Insider · CIK 0001045463

William P Scully

Files at: PRTA, YTEN. On EDGAR ↗

Period1M 3M 6M 1Y 2Y All datashares as filed — not split-adjusted

Open-market buys & salesbuys $4.0M · 8sales $0 · 0net $4.0M

Reported trades — common stock

Trade	Reported (ET)	Company	Shares	Avg price	Total	Owned after	Δ stake	Flags
Sep 18, 2026 PForm 4 →	Sep 21, 4:23 pm EDT	PROTHENA CORP PUBLIC LTD COPRTA	100,000	$8.43	$843,460	927,000	+12.1%
Sep 2, 2026 PForm 4 →	Sep 3, 6:23 pm EDT	PROTHENA CORP PUBLIC LTD COPRTA	27,000	$9.47	$255,739	827,000	+3.38%
Aug 20, 2026 PForm 4 →	Aug 21, 2:32 pm EDT	PROTHENA CORP PUBLIC LTD COPRTA	50,000	$8.79	$439,430	800,000	+6.67%
Aug 17, 2026 GForm 4 →	Aug 18, 4:03 pm EDT	PROTHENA CORP PUBLIC LTD COPRTA	963,553	—	—	750,000	—
Aug 10, 2026 GForm 4 →	Aug 11, 4:08 pm EDT	PROTHENA CORP PUBLIC LTD COPRTA	251,553	—	—	1,041,553	—
Aug 7, 2026 PForm 4 →	Aug 10, 3:24 pm EDT	PROTHENA CORP PUBLIC LTD COPRTA	37,500	$8.62	$323,220	83,500	+81.5%
Jun 16, 2026 PForm 4 →	Jun 18, 11:38 am EDT	PROTHENA CORP PUBLIC LTD COPRTA	20,000	$7.90	$157,990	756,000	+2.72%
Jun 15, 2026 GForm 4 →	Jun 16, 4:58 pm EDT	PROTHENA CORP PUBLIC LTD COPRTA	325,000	—	—	736,000	—
Jun 11, 2026 PForm 4 →	Jun 12, 5:59 pm EDT	PROTHENA CORP PUBLIC LTD COPRTA	125,000	$8.17	$1,021,225	1,061,000	+13.4%
Jun 4, 2026 PForm 4 →	Jun 5, 1:46 pm EDT	PROTHENA CORP PUBLIC LTD COPRTA	50,000	$9.31	$465,295	936,000	+5.64%
Jun 2, 2026 PForm 4 →	Jun 3, 12:41 pm EDT	PROTHENA CORP PUBLIC LTD COPRTA	50,000	$9.43	$471,300	886,000	+5.98%

Reported trades — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.