PRTA tangible book value per share history

Annual fiscal periods. Dates are reporting period ends; fiscal years can differ from calendar years.

Prothena Plc Tangible Book Value Per Share — Annual fiscal periods
Period ending	Tangible Book Value Per Share
Dec 31, 2025	5.2105
Dec 31, 2024	9.0554
Dec 31, 2023	10.5488
Dec 31, 2022	13.1318
Dec 31, 2021	10.5373
Dec 31, 2020	4.6099
Dec 31, 2019	6.8432
Dec 31, 2018	8.2675
Dec 31, 2017	10.9217
Dec 31, 2016	10.7554
Dec 31, 2015	11.8931
Dec 31, 2014	11.7497
Dec 31, 2013	9.3081
Dec 31, 2012	8.6641
Dec 31, 2011	-0.368
Dec 31, 2010	0.0057