PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

HighVista Strategies LLC's Holding History (CIK: 0001335325)

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

Q3 2023

Shares 9,195 Value ($000) $444 Avg Close $59.41 Range $45.22 - $73.14

Q2 2023

Shares 6,406 Value ($000) $437 Avg Close $64.50 Range $47.45 - $79.65

Q1 2023

Shares 14,572 Value ($000) $706 Avg Close $52.83 Range $45.06 - $60.82

Q4 2022

Shares 14,572 Value ($000) $878 Avg Close $58.56 Range $50.89 - $66.47

Q1 2022

Shares 12,953 Value ($000) $474 Avg Close $36.05 Range $29.53 - $49.77

Q4 2021

Shares 28,078 Value ($000) $1,387 Avg Close $55.45 Range $40.50 - $74.32

Q3 2020

Shares 44,414 Value ($000) $444 Avg Close $12.03 Range $9.67 - $13.78

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2023	9,195	$444	$59.41	$45.22 - $73.14
Q2 2023	6,406	$437	$64.50	$47.45 - $79.65
Q1 2023	14,572	$706	$52.83	$45.06 - $60.82
Q4 2022	14,572	$878	$58.56	$50.89 - $66.47
Q1 2022	12,953	$474	$36.05	$29.53 - $49.77
Q4 2021	28,078	$1,387	$55.45	$40.50 - $74.32
Q3 2020	44,414	$444	$12.03	$9.67 - $13.78