PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

CANADA PENSION PLAN INVESTMENT BOARD's Holding History (CIK: 0001283718)

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

Q4 2025

Shares 7,100 Value ($000) $68 Avg Close $10.18 Range $9.07 - $11.69

Q1 2023

Shares 26,800 Value ($000) $1,299 Avg Close $52.83 Range $45.06 - $60.82

Q4 2019

Shares 75,600 Value ($000) $1,197 Avg Close $10.72 Range $7.40 - $17.63

Q3 2013

Shares 16,048 Value ($000) $325 Avg Close $17.69 Range $12.14 - $22.48

Q2 2013

Shares 16,048 Value ($000) $207 Avg Close $9.30 Range $6.49 - $14.00

Q1 2013

Shares 16,048 Value ($000) $107 Avg Close $6.35 Range $5.64 - $7.50

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	7,100	$68	$10.18	$9.07 - $11.69
Q1 2023	26,800	$1,299	$52.83	$45.06 - $60.82
Q4 2019	75,600	$1,197	$10.72	$7.40 - $17.63
Q3 2013	16,048	$325	$17.69	$12.14 - $22.48
Q2 2013	16,048	$207	$9.30	$6.49 - $14.00
Q1 2013	16,048	$107	$6.35	$5.64 - $7.50