PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

Rubric Capital Management LP's Holding History (CIK: 0001687509)

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

Q4 2025

Shares 3,677,331 Value ($000) $35,119 Avg Close $10.18 Range $9.07 - $11.69

Q3 2025

Shares 1,540,373 Value ($000) $15,034 Avg Close $7.69 Range $5.96 - $9.85

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	3,677,331	$35,119	$10.18	$9.07 - $11.69
Q3 2025	1,540,373	$15,034	$7.69	$5.96 - $9.85