PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

Optiver Holding B.V.'s Holding History (CIK: 0001859606)

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

Q4 2025

Shares 296 Value ($000) $3 Avg Close $10.18 Range $9.07 - $11.69

Q3 2025

Shares 352 Value ($000) $3 Avg Close $7.69 Range $5.96 - $9.85

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	296	$3	$10.18	$9.07 - $11.69
Q3 2025	352	$3	$7.69	$5.96 - $9.85