PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

HM PAYSON & CO's Holding History (CIK: 0000928052)

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

Q4 2025

Shares 600 Value ($000) $6 Avg Close $10.18 Range $9.07 - $11.69

Q3 2025

Shares 600 Value ($000) $6 Avg Close $7.69 Range $5.96 - $9.85

Q2 2025

Shares 600 Value ($000) $4 Avg Close $7.50 Range $4.32 - $12.45

Q1 2025

Shares 600 Value ($000) $7 Avg Close $14.14 Range $11.78 - $16.66

Q4 2024

Shares 800 Value ($000) $11 Avg Close $15.77 Range $11.70 - $18.88

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	600	$6	$10.18	$9.07 - $11.69
Q3 2025	600	$6	$7.69	$5.96 - $9.85
Q2 2025	600	$4	$7.50	$4.32 - $12.45
Q1 2025	600	$7	$14.14	$11.78 - $16.66
Q4 2024	800	$11	$15.77	$11.70 - $18.88