PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

BlackRock, Inc.'s Holding History (CIK: 0002012383)

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

Q4 2025

Shares 4,107,459 Value ($000) $39,226 Avg Close $10.18 Range $9.07 - $11.69

Q3 2025

Shares 3,598,417 Value ($000) $35,121 Avg Close $7.69 Range $5.96 - $9.85

Q2 2025

Shares 3,939,398 Value ($000) $23,912 Avg Close $7.50 Range $4.32 - $12.45

Q1 2025

Shares 4,042,301 Value ($000) $50,023 Avg Close $14.14 Range $11.78 - $16.66

Q4 2024

Shares 4,122,376 Value ($000) $57,095 Avg Close $15.77 Range $11.70 - $18.88

Q3 2024

Shares 4,028,387 Value ($000) $67,395 Avg Close $21.50 Range $15.52 - $25.42

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	4,107,459	$39,226	$10.18	$9.07 - $11.69
Q3 2025	3,598,417	$35,121	$7.69	$5.96 - $9.85
Q2 2025	3,939,398	$23,912	$7.50	$4.32 - $12.45
Q1 2025	4,042,301	$50,023	$14.14	$11.78 - $16.66
Q4 2024	4,122,376	$57,095	$15.77	$11.70 - $18.88
Q3 2024	4,028,387	$67,395	$21.50	$15.52 - $25.42