PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

Capital World Investors's Holding History (CIK: 0001422849)

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

Q1 2018

Shares 152,000 Value ($000) $5,580 Avg Close $36.37 Range $27.19 - $46.14

Q4 2017

Shares 1,168,214 Value ($000) $43,796 Avg Close $50.91 Range $34.85 - $64.96

Q3 2017

Shares 1,323,114 Value ($000) $85,698 Avg Close $61.26 Range $52.91 - $70.00

Q2 2017

Shares 1,323,114 Value ($000) $71,607 Avg Close $53.29 Range $48.23 - $59.10

Q1 2017

Shares 1,323,114 Value ($000) $73,817 Avg Close $52.54 Range $45.13 - $63.14

Q4 2016

Shares 1,323,114 Value ($000) $65,084 Avg Close $55.18 Range $40.58 - $68.18

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2018	152,000	$5,580	$36.37	$27.19 - $46.14
Q4 2017	1,168,214	$43,796	$50.91	$34.85 - $64.96
Q3 2017	1,323,114	$85,698	$61.26	$52.91 - $70.00
Q2 2017	1,323,114	$71,607	$53.29	$48.23 - $59.10
Q1 2017	1,323,114	$73,817	$52.54	$45.13 - $63.14
Q4 2016	1,323,114	$65,084	$55.18	$40.58 - $68.18