PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

XTX Topco Ltd's Holding History (CIK: 0001828301)

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

Q4 2025

Shares 54,881 Value ($000) $524 Avg Close $10.18 Range $9.07 - $11.69

Q3 2025

Shares 15,808 Value ($000) $154 Avg Close $7.69 Range $5.96 - $9.85

Q4 2024

Shares 18,665 Value ($000) $259 Avg Close $15.77 Range $11.70 - $18.88

Q3 2024

Shares 15,564 Value ($000) $260 Avg Close $21.50 Range $15.52 - $25.42

Q4 2023

Shares 7,264 Value ($000) $264 Avg Close $38.49 Range $28.51 - $55.89

Q3 2023

Shares 11,112 Value ($000) $536 Avg Close $59.41 Range $45.22 - $73.14

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	54,881	$524	$10.18	$9.07 - $11.69
Q3 2025	15,808	$154	$7.69	$5.96 - $9.85
Q4 2024	18,665	$259	$15.77	$11.70 - $18.88
Q3 2024	15,564	$260	$21.50	$15.52 - $25.42
Q4 2023	7,264	$264	$38.49	$28.51 - $55.89
Q3 2023	11,112	$536	$59.41	$45.22 - $73.14