PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

Y-Intercept (Hong Kong) Ltd's Holding History (CIK: 0001772875)

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

Q4 2025

Shares 100,510 Value ($000) $960 Avg Close $10.18 Range $9.07 - $11.69

Q3 2025

Shares 12,171 Value ($000) $119 Avg Close $7.69 Range $5.96 - $9.85

Q2 2024

Shares 21,351 Value ($000) $441 Avg Close $21.64 Range $18.69 - $26.36

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	100,510	$960	$10.18	$9.07 - $11.69
Q3 2025	12,171	$119	$7.69	$5.96 - $9.85
Q2 2024	21,351	$441	$21.64	$18.69 - $26.36