PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

T. Rowe Price Investment Management, Inc.'s Holding History (CIK: 0001897612)

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

Q3 2023

Shares 853,479 Value ($000) $41 Avg Close $59.41 Range $45.22 - $73.14

Q2 2023

Shares 876,170 Value ($000) $60 Avg Close $64.50 Range $47.45 - $79.65

Q1 2023

Shares 914,683 Value ($000) $44 Avg Close $52.83 Range $45.06 - $60.82

Q4 2022

Shares 927,959 Value ($000) $56 Avg Close $58.56 Range $50.89 - $66.47

Q3 2022

Shares 847,962 Value ($000) $51,412 Avg Close $31.61 Range $25.02 - $64.00

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2023	853,479	$41	$59.41	$45.22 - $73.14
Q2 2023	876,170	$60	$64.50	$47.45 - $79.65
Q1 2023	914,683	$44	$52.83	$45.06 - $60.82
Q4 2022	927,959	$56	$58.56	$50.89 - $66.47
Q3 2022	847,962	$51,412	$31.61	$25.02 - $64.00