PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

SBI Securities Co., Ltd.'s Holding History (CIK: 0001851815)

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

Q4 2025

Shares 15 Value ($000) $0 Avg Close $10.18 Range $9.07 - $11.69

Q3 2025

Shares 29 Value ($000) $0 Avg Close $7.69 Range $5.96 - $9.85

Q2 2025

Shares 962 Value ($000) $6 Avg Close $7.50 Range $4.32 - $12.45

Q1 2025

Shares 962 Value ($000) $12 Avg Close $14.14 Range $11.78 - $16.66

Q4 2024

Shares 972 Value ($000) $13 Avg Close $15.77 Range $11.70 - $18.88

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	15	$0	$10.18	$9.07 - $11.69
Q3 2025	29	$0	$7.69	$5.96 - $9.85
Q2 2025	962	$6	$7.50	$4.32 - $12.45
Q1 2025	962	$12	$14.14	$11.78 - $16.66
Q4 2024	972	$13	$15.77	$11.70 - $18.88