PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

Cambridge Investment Research Advisors, Inc.'s Holding History (CIK: 0001419186)

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

Q3 2025

Shares 27,513 Value ($000) $0 Avg Close $7.69 Range $5.96 - $9.85

Q2 2025

Shares 27,311 Value ($000) $0 Avg Close $7.50 Range $4.32 - $12.45

Q1 2025

Shares 10,164 Value ($000) $0 Avg Close $14.14 Range $11.78 - $16.66

Q4 2023

Shares 5,985 Value ($000) $0 Avg Close $38.49 Range $28.51 - $55.89

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	27,513	$0	$7.69	$5.96 - $9.85
Q2 2025	27,311	$0	$7.50	$4.32 - $12.45
Q1 2025	10,164	$0	$14.14	$11.78 - $16.66
Q4 2023	5,985	$0	$38.49	$28.51 - $55.89