PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

GAM Holding AG's Holding History (CIK: 0001438848)

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

Q1 2018

Shares 76,300 Value ($000) $2,801 Avg Close $36.37 Range $27.19 - $46.14

Q4 2017

Shares 76,300 Value ($000) $2,860 Avg Close $50.91 Range $34.85 - $64.96

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2018	76,300	$2,801	$36.37	$27.19 - $46.14
Q4 2017	76,300	$2,860	$50.91	$34.85 - $64.96