PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

PRICE T ROWE ASSOCIATES INC /MD/'s Holding History (CIK: 0000080255)

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

Q4 2025
Shares 81,515 Value ($000) $1 Avg Close $10.18 Range $9.07 - $11.69
Q3 2025
Shares 78,547 Value ($000) $1 Avg Close $7.69 Range $5.96 - $9.85
Q2 2025
Shares 71,047 Value ($000) $0 Avg Close $7.50 Range $4.32 - $12.45
Q1 2025
Shares 3,455,856 Value ($000) $43 Avg Close $14.14 Range $11.78 - $16.66
Q4 2024
Shares 3,685,708 Value ($000) $51 Avg Close $15.77 Range $11.70 - $18.88
Q3 2024
Shares 3,822,434 Value ($000) $64 Avg Close $21.50 Range $15.52 - $25.42
Q2 2024
Shares 4,237,404 Value ($000) $87 Avg Close $21.64 Range $18.69 - $26.36
Q1 2024
Shares 4,201,771 Value ($000) $104 Avg Close $29.75 Range $24.25 - $41.55
Q4 2023
Shares 4,237,351 Value ($000) $154 Avg Close $38.49 Range $28.51 - $55.89
Q3 2023
Shares 3,820,013 Value ($000) $184 Avg Close $59.41 Range $45.22 - $73.14
Q2 2023
Shares 3,553,768 Value ($000) $243 Avg Close $64.50 Range $47.45 - $79.65
Q1 2023
Shares 3,202,293 Value ($000) $155 Avg Close $52.83 Range $45.06 - $60.82
Q4 2022
Shares 3,205,903 Value ($000) $193 Avg Close $58.56 Range $50.89 - $66.47
Q3 2022
Shares 2,981,941 Value ($000) $180,796 Avg Close $31.61 Range $25.02 - $64.00
Q2 2022
Shares 5,965,788 Value ($000) $161,971 Avg Close $29.25 Range $21.06 - $40.31
Q1 2022
Shares 6,113,742 Value ($000) $223,580 Avg Close $36.05 Range $29.53 - $49.77
Q4 2021
Shares 5,948,861 Value ($000) $293,874 Avg Close $55.45 Range $40.50 - $74.32
Q3 2021
Shares 6,062,629 Value ($000) $431,841 Avg Close $62.11 Range $45.09 - $79.75
Q2 2021
Shares 5,823,085 Value ($000) $299,365 Avg Close $31.20 Range $21.30 - $59.74
Q1 2021
Shares 3,312,346 Value ($000) $83,206 Avg Close $18.81 Range $10.72 - $28.66
Q4 2020
Shares 14,415 Value ($000) $173 Avg Close $11.83 Range $9.86 - $14.14
Q3 2020
Shares 14,525 Value ($000) $145 Avg Close $12.03 Range $9.67 - $13.78
Q3 2018
Shares 465,273 Value ($000) $6,086 Avg Close $14.44 Range $12.23 - $15.91
Q2 2018
Shares 798,254 Value ($000) $11,639 Avg Close $19.75 Range $10.43 - $44.75
Q1 2018
Shares 5,676,587 Value ($000) $208,388 Avg Close $36.37 Range $27.19 - $46.14
Q4 2017
Shares 6,103,759 Value ($000) $228,830 Avg Close $50.91 Range $34.85 - $64.96
Q3 2017
Shares 5,448,891 Value ($000) $352,925 Avg Close $61.26 Range $52.91 - $70.00
Q2 2017
Shares 4,422,265 Value ($000) $239,333 Avg Close $53.29 Range $48.23 - $59.10
Q1 2017
Shares 4,482,764 Value ($000) $250,093 Avg Close $52.54 Range $45.13 - $63.14
Q4 2016
Shares 3,315,177 Value ($000) $163,074 Avg Close $55.18 Range $40.58 - $68.18
Q3 2016
Shares 3,360,550 Value ($000) $201,532 Avg Close $53.65 Range $35.04 - $64.50
Q2 2016
Shares 3,338,383 Value ($000) $116,710 Avg Close $43.55 Range $33.53 - $51.45
Q1 2016
Shares 3,327,983 Value ($000) $136,980 Avg Close $39.14 Range $28.20 - $67.32
Q4 2015
Shares 3,100,683 Value ($000) $211,188 Avg Close $60.32 Range $40.47 - $76.42
Q3 2015
Shares 3,099,103 Value ($000) $140,513 Avg Close $58.24 Range $42.20 - $70.52
Q2 2015
Shares 3,475,196 Value ($000) $183,039 Avg Close $39.47 Range $30.14 - $55.97
Q1 2015
Shares 3,439,296 Value ($000) $131,175 Avg Close $25.65 Range $18.76 - $45.00
Q4 2014
Shares 3,436,496 Value ($000) $71,342 Avg Close $20.87 Range $17.00 - $24.67
Q3 2014
Shares 2,946,196 Value ($000) $65,288 Avg Close $21.20 Range $16.71 - $24.31
Q2 2014
Shares 2,935,996 Value ($000) $66,207 Avg Close $25.01 Range $18.52 - $41.33
Q1 2014
Shares 2,255,396 Value ($000) $86,404 Avg Close $32.24 Range $24.42 - $49.24
Q4 2013
Shares 1,456,806 Value ($000) $38,634 Avg Close $25.08 Range $18.93 - $30.55
Q3 2013
Shares 197,784 Value ($000) $4,001 Avg Close $17.69 Range $12.14 - $22.48
Q2 2013
Shares 135,884 Value ($000) $1,754 Avg Close $9.30 Range $6.49 - $14.00