PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

Virtus Investment Advisers, LLC's Holding History (CIK: 0000019481)

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

Q4 2025

Shares 25,679 Value ($000) $245 Avg Close $10.18 Range $9.07 - $11.69

Q3 2025

Shares 22,443 Value ($000) $219 Avg Close $7.69 Range $5.96 - $9.85

Q2 2025

Shares 18,547 Value ($000) $113 Avg Close $7.50 Range $4.32 - $12.45

Q1 2025

Shares 11,891 Value ($000) $147 Avg Close $14.14 Range $11.78 - $16.66

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	25,679	$245	$10.18	$9.07 - $11.69
Q3 2025	22,443	$219	$7.69	$5.96 - $9.85
Q2 2025	18,547	$113	$7.50	$4.32 - $12.45
Q1 2025	11,891	$147	$14.14	$11.78 - $16.66