PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0001081019)

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

Q4 2025
Shares 2,710 Value ($000) $26 Avg Close $10.18 Range $9.07 - $11.69
Q3 2025
Shares 2,415 Value ($000) $24 Avg Close $7.69 Range $5.96 - $9.85
Q2 2025
Shares 33,243 Value ($000) $202 Avg Close $7.50 Range $4.32 - $12.45
Q1 2025
Shares 33,243 Value ($000) $411 Avg Close $14.14 Range $11.78 - $16.66
Q4 2024
Shares 33,243 Value ($000) $460 Avg Close $15.77 Range $11.70 - $18.88
Q3 2024
Shares 33,562 Value ($000) $561 Avg Close $21.50 Range $15.52 - $25.42
Q2 2024
Shares 34,768 Value ($000) $718 Avg Close $21.64 Range $18.69 - $26.36
Q1 2024
Shares 40,442 Value ($000) $1,002 Avg Close $29.75 Range $24.25 - $41.55
Q4 2023
Shares 42,710 Value ($000) $1,552 Avg Close $38.49 Range $28.51 - $55.89
Q3 2023
Shares 44,132 Value ($000) $2,129 Avg Close $59.41 Range $45.22 - $73.14
Q2 2023
Shares 48,504 Value ($000) $3,312 Avg Close $64.50 Range $47.45 - $79.65
Q1 2023
Shares 44,308 Value ($000) $2,148 Avg Close $52.83 Range $45.06 - $60.82
Q4 2022
Shares 43,220 Value ($000) $2,604 Avg Close $58.56 Range $50.89 - $66.47
Q3 2022
Shares 42,203 Value ($000) $2,559 Avg Close $31.61 Range $25.02 - $64.00
Q2 2022
Shares 43,171 Value ($000) $1,172 Avg Close $29.25 Range $21.06 - $40.31
Q1 2022
Shares 43,235 Value ($000) $1,581 Avg Close $36.05 Range $29.53 - $49.77
Q4 2021
Shares 46,432 Value ($000) $2,294 Avg Close $55.45 Range $40.50 - $74.32
Q3 2021
Shares 44,191 Value ($000) $3,148 Avg Close $62.11 Range $45.09 - $79.75
Q2 2021
Shares 47,022 Value ($000) $2,417 Avg Close $31.20 Range $21.30 - $59.74
Q1 2021
Shares 46,386 Value ($000) $1,165 Avg Close $18.81 Range $10.72 - $28.66
Q4 2020
Shares 46,386 Value ($000) $557 Avg Close $11.83 Range $9.86 - $14.14
Q3 2020
Shares 46,386 Value ($000) $463 Avg Close $12.03 Range $9.67 - $13.78
Q2 2020
Shares 46,386 Value ($000) $485 Avg Close $11.11 Range $9.25 - $12.98
Q1 2020
Shares 60,719 Value ($000) $650 Avg Close $12.11 Range $7.10 - $16.05
Q4 2019
Shares 62,645 Value ($000) $992 Avg Close $10.72 Range $7.40 - $17.63
Q3 2019
Shares 62,645 Value ($000) $491 Avg Close $8.88 Range $6.71 - $10.70
Q2 2019
Shares 61,519 Value ($000) $650 Avg Close $10.27 Range $8.67 - $12.54
Q1 2019
Shares 61,519 Value ($000) $746 Avg Close $12.49 Range $9.97 - $14.77
Q4 2018
Shares 62,930 Value ($000) $648 Avg Close $11.89 Range $8.63 - $13.83
Q3 2018
Shares 61,487 Value ($000) $804 Avg Close $14.44 Range $12.23 - $15.91
Q2 2018
Shares 61,491 Value ($000) $897 Avg Close $19.75 Range $10.43 - $44.75
Q1 2018
Shares 59,139 Value ($000) $2,171 Avg Close $36.37 Range $27.19 - $46.14
Q4 2017
Shares 60,534 Value ($000) $2,269 Avg Close $50.91 Range $34.85 - $64.96
Q3 2017
Shares 61,452 Value ($000) $3,980 Avg Close $61.26 Range $52.91 - $70.00
Q2 2017
Shares 68,067 Value ($000) $3,684 Avg Close $53.29 Range $48.23 - $59.10
Q1 2017
Shares 68,431 Value ($000) $3,818 Avg Close $52.54 Range $45.13 - $63.14
Q4 2016
Shares 71,631 Value ($000) $3,524 Avg Close $55.18 Range $40.58 - $68.18
Q3 2016
Shares 73,531 Value ($000) $4,410 Avg Close $53.65 Range $35.04 - $64.50
Q2 2016
Shares 72,831 Value ($000) $2,546 Avg Close $43.55 Range $33.53 - $51.45
Q1 2016
Shares 71,754 Value ($000) $2,953 Avg Close $39.14 Range $28.20 - $67.32
Q4 2015
Shares 57,940 Value ($000) $3,946 Avg Close $60.32 Range $40.47 - $76.42
Q3 2015
Shares 57,040 Value ($000) $2,586 Avg Close $58.24 Range $42.20 - $70.52
Q2 2015
Shares 57,140 Value ($000) $3,010 Avg Close $39.47 Range $30.14 - $55.97
Q1 2015
Shares 48,637 Value ($000) $1,855 Avg Close $25.65 Range $18.76 - $45.00
Q4 2014
Shares 49,437 Value ($000) $1,026 Avg Close $20.87 Range $17.00 - $24.67
Q3 2014
Shares 49,227 Value ($000) $1,091 Avg Close $21.20 Range $16.71 - $24.31
Q2 2014
Shares 39,997 Value ($000) $902 Avg Close $25.01 Range $18.52 - $41.33
Q1 2014
Shares 25,797 Value ($000) $988 Avg Close $32.24 Range $24.42 - $49.24
Q4 2013
Shares 25,797 Value ($000) $684 Avg Close $25.08 Range $18.93 - $30.55
Q3 2013
Shares 21,297 Value ($000) $431 Avg Close $17.69 Range $12.14 - $22.48
Q2 2013
Shares 20,697 Value ($000) $267 Avg Close $9.30 Range $6.49 - $14.00