PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

Ikarian Capital, LLC's Holding History (CIK: 0001778253)

Note: Option positions (PUT/CALL) are excluded.

Q1 2021

Shares 437,430 Value ($000) $10,989 Avg Close $18.81 Range $10.72 - $28.66

Q4 2020

Shares 1,186,700 Value ($000) $14,252 Avg Close $11.83 Range $9.86 - $14.14

Q4 2019

Shares 29,832 Value ($000) $472 Avg Close $10.72 Range $7.40 - $17.63

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2021	437,430	$10,989	$18.81	$10.72 - $28.66
Q4 2020	1,186,700	$14,252	$11.83	$9.86 - $14.14
Q4 2019	29,832	$472	$10.72	$7.40 - $17.63