PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

CHARLES SCHWAB INVESTMENT MANAGEMENT INC's Holding History (CIK: 0000884546)

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

Q4 2025

Shares 357,335 Value ($000) $3,413 Avg Close $10.18 Range $9.07 - $11.69

Q3 2025

Shares 350,821 Value ($000) $3,424 Avg Close $7.69 Range $5.96 - $9.85

Q2 2025

Shares 275,084 Value ($000) $1,670 Avg Close $7.50 Range $4.32 - $12.45

Q1 2025

Shares 319,607 Value ($000) $3,955 Avg Close $14.14 Range $11.78 - $16.66

Q4 2024

Shares 327,151 Value ($000) $4,531 Avg Close $15.77 Range $11.70 - $18.88

Q3 2024

Shares 324,962 Value ($000) $5,437 Avg Close $21.50 Range $15.52 - $25.42

Q2 2024

Shares 327,139 Value ($000) $6,752 Avg Close $21.64 Range $18.69 - $26.36

Q1 2024

Shares 318,905 Value ($000) $7,899 Avg Close $29.75 Range $24.25 - $41.55

Q4 2023

Shares 313,230 Value ($000) $11,383 Avg Close $38.49 Range $28.51 - $55.89

Q3 2023

Shares 308,537 Value ($000) $14,887 Avg Close $59.41 Range $45.22 - $73.14

Q2 2023

Shares 312,483 Value ($000) $21,336 Avg Close $64.50 Range $47.45 - $79.65

Q1 2023

Shares 298,971 Value ($000) $14,491 Avg Close $52.83 Range $45.06 - $60.82

Q4 2022

Shares 300,850 Value ($000) $18,126 Avg Close $58.56 Range $50.89 - $66.47

Q3 2022

Shares 285,742 Value ($000) $17,325 Avg Close $31.61 Range $25.02 - $64.00

Q2 2022

Shares 277,475 Value ($000) $7,534 Avg Close $29.25 Range $21.06 - $40.31

Q1 2022

Shares 284,402 Value ($000) $10,401 Avg Close $36.05 Range $29.53 - $49.77

Q4 2021

Shares 255,614 Value ($000) $12,628 Avg Close $55.45 Range $40.50 - $74.32

Q3 2021

Shares 241,715 Value ($000) $17,218 Avg Close $62.11 Range $45.09 - $79.75

Q2 2021

Shares 206,826 Value ($000) $10,633 Avg Close $31.20 Range $21.30 - $59.74

Q1 2021

Shares 186,391 Value ($000) $4,683 Avg Close $18.81 Range $10.72 - $28.66

Q4 2020

Shares 182,539 Value ($000) $2,193 Avg Close $11.83 Range $9.86 - $14.14

Q3 2020

Shares 182,961 Value ($000) $1,828 Avg Close $12.03 Range $9.67 - $13.78

Q2 2020

Shares 237,588 Value ($000) $2,486 Avg Close $11.11 Range $9.25 - $12.98

Q1 2020

Shares 242,406 Value ($000) $2,594 Avg Close $12.11 Range $7.10 - $16.05

Q4 2019

Shares 239,006 Value ($000) $3,784 Avg Close $10.72 Range $7.40 - $17.63

Q3 2019

Shares 233,616 Value ($000) $1,832 Avg Close $8.88 Range $6.71 - $10.70

Q2 2019

Shares 234,340 Value ($000) $2,477 Avg Close $10.27 Range $8.67 - $12.54

Q1 2019

Shares 219,039 Value ($000) $2,657 Avg Close $12.49 Range $9.97 - $14.77

Q4 2018

Shares 220,269 Value ($000) $2,269 Avg Close $11.89 Range $8.63 - $13.83

Q3 2018

Shares 201,390 Value ($000) $2,635 Avg Close $14.44 Range $12.23 - $15.91

Q2 2018

Shares 204,787 Value ($000) $2,986 Avg Close $19.75 Range $10.43 - $44.75

Q1 2018

Shares 175,254 Value ($000) $6,434 Avg Close $36.37 Range $27.19 - $46.14

Q4 2017

Shares 181,879 Value ($000) $6,819 Avg Close $50.91 Range $34.85 - $64.96

Q3 2017

Shares 172,578 Value ($000) $11,178 Avg Close $61.26 Range $52.91 - $70.00

Q2 2017

Shares 163,681 Value ($000) $8,859 Avg Close $53.29 Range $48.23 - $59.10

Q1 2017

Shares 153,857 Value ($000) $8,584 Avg Close $52.54 Range $45.13 - $63.14

Q4 2016

Shares 137,192 Value ($000) $6,749 Avg Close $55.18 Range $40.58 - $68.18

Q3 2016

Shares 130,146 Value ($000) $7,805 Avg Close $53.65 Range $35.04 - $64.50

Q2 2016

Shares 112,362 Value ($000) $3,929 Avg Close $43.55 Range $33.53 - $51.45

Q1 2016

Shares 118,492 Value ($000) $4,878 Avg Close $39.14 Range $28.20 - $67.32

Q4 2015

Shares 107,866 Value ($000) $7,347 Avg Close $60.32 Range $40.47 - $76.42

Q3 2015

Shares 92,860 Value ($000) $4,211 Avg Close $58.24 Range $42.20 - $70.52

Q2 2015

Shares 54,772 Value ($000) $2,885 Avg Close $39.47 Range $30.14 - $55.97

Q1 2015

Shares 48,303 Value ($000) $1,843 Avg Close $25.65 Range $18.76 - $45.00

Q4 2014

Shares 48,303 Value ($000) $1,003 Avg Close $20.87 Range $17.00 - $24.67

Q3 2014

Shares 48,303 Value ($000) $1,071 Avg Close $21.20 Range $16.71 - $24.31

Q2 2014

Shares 32,100 Value ($000) $724 Avg Close $25.01 Range $18.52 - $41.33

Q1 2014

Shares 20,500 Value ($000) $786 Avg Close $32.24 Range $24.42 - $49.24

Q4 2013

Shares 20,500 Value ($000) $544 Avg Close $25.08 Range $18.93 - $30.55

Q3 2013

Shares 16,900 Value ($000) $339 Avg Close $17.69 Range $12.14 - $22.48

Q2 2013

Shares 16,900 Value ($000) $220 Avg Close $9.30 Range $6.49 - $14.00

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	357,335	$3,413	$10.18	$9.07 - $11.69
Q3 2025	350,821	$3,424	$7.69	$5.96 - $9.85
Q2 2025	275,084	$1,670	$7.50	$4.32 - $12.45
Q1 2025	319,607	$3,955	$14.14	$11.78 - $16.66
Q4 2024	327,151	$4,531	$15.77	$11.70 - $18.88
Q3 2024	324,962	$5,437	$21.50	$15.52 - $25.42
Q2 2024	327,139	$6,752	$21.64	$18.69 - $26.36
Q1 2024	318,905	$7,899	$29.75	$24.25 - $41.55
Q4 2023	313,230	$11,383	$38.49	$28.51 - $55.89
Q3 2023	308,537	$14,887	$59.41	$45.22 - $73.14
Q2 2023	312,483	$21,336	$64.50	$47.45 - $79.65
Q1 2023	298,971	$14,491	$52.83	$45.06 - $60.82
Q4 2022	300,850	$18,126	$58.56	$50.89 - $66.47
Q3 2022	285,742	$17,325	$31.61	$25.02 - $64.00
Q2 2022	277,475	$7,534	$29.25	$21.06 - $40.31
Q1 2022	284,402	$10,401	$36.05	$29.53 - $49.77
Q4 2021	255,614	$12,628	$55.45	$40.50 - $74.32
Q3 2021	241,715	$17,218	$62.11	$45.09 - $79.75
Q2 2021	206,826	$10,633	$31.20	$21.30 - $59.74
Q1 2021	186,391	$4,683	$18.81	$10.72 - $28.66
Q4 2020	182,539	$2,193	$11.83	$9.86 - $14.14
Q3 2020	182,961	$1,828	$12.03	$9.67 - $13.78
Q2 2020	237,588	$2,486	$11.11	$9.25 - $12.98
Q1 2020	242,406	$2,594	$12.11	$7.10 - $16.05
Q4 2019	239,006	$3,784	$10.72	$7.40 - $17.63
Q3 2019	233,616	$1,832	$8.88	$6.71 - $10.70
Q2 2019	234,340	$2,477	$10.27	$8.67 - $12.54
Q1 2019	219,039	$2,657	$12.49	$9.97 - $14.77
Q4 2018	220,269	$2,269	$11.89	$8.63 - $13.83
Q3 2018	201,390	$2,635	$14.44	$12.23 - $15.91
Q2 2018	204,787	$2,986	$19.75	$10.43 - $44.75
Q1 2018	175,254	$6,434	$36.37	$27.19 - $46.14
Q4 2017	181,879	$6,819	$50.91	$34.85 - $64.96
Q3 2017	172,578	$11,178	$61.26	$52.91 - $70.00
Q2 2017	163,681	$8,859	$53.29	$48.23 - $59.10
Q1 2017	153,857	$8,584	$52.54	$45.13 - $63.14
Q4 2016	137,192	$6,749	$55.18	$40.58 - $68.18
Q3 2016	130,146	$7,805	$53.65	$35.04 - $64.50
Q2 2016	112,362	$3,929	$43.55	$33.53 - $51.45
Q1 2016	118,492	$4,878	$39.14	$28.20 - $67.32
Q4 2015	107,866	$7,347	$60.32	$40.47 - $76.42
Q3 2015	92,860	$4,211	$58.24	$42.20 - $70.52
Q2 2015	54,772	$2,885	$39.47	$30.14 - $55.97
Q1 2015	48,303	$1,843	$25.65	$18.76 - $45.00
Q4 2014	48,303	$1,003	$20.87	$17.00 - $24.67
Q3 2014	48,303	$1,071	$21.20	$16.71 - $24.31
Q2 2014	32,100	$724	$25.01	$18.52 - $41.33
Q1 2014	20,500	$786	$32.24	$24.42 - $49.24
Q4 2013	20,500	$544	$25.08	$18.93 - $30.55
Q3 2013	16,900	$339	$17.69	$12.14 - $22.48
Q2 2013	16,900	$220	$9.30	$6.49 - $14.00