WESTAMERICA BANCORPORATION

Ticker: WABC CUSIP: 957090103 Class: Common Stock

DIMENSIONAL FUND ADVISORS LP's Holding History (CIK: 0000354204)

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

Q4 2025

Shares 897,572 Value ($000) $42,932 Avg Close $47.37 Range $44.09 - $50.85

Q3 2025

Shares 894,194 Value ($000) $44,700 Avg Close $48.41 Range $45.39 - $50.63

Q2 2025

Shares 887,721 Value ($000) $43,002 Avg Close $46.41 Range $40.44 - $50.21

Q1 2025

Shares 885,080 Value ($000) $44,810 Avg Close $48.88 Range $46.41 - $51.42

Q4 2024

Shares 875,300 Value ($000) $45,919 Avg Close $50.92 Range $44.42 - $57.25

Q3 2024

Shares 865,372 Value ($000) $42,766 Avg Close $47.96 Range $44.53 - $54.88

Q2 2024

Shares 861,398 Value ($000) $41,801 Avg Close $44.71 Range $41.94 - $47.91

Q1 2024

Shares 819,557 Value ($000) $40,060 Avg Close $44.93 Range $40.74 - $52.58

Q4 2023

Shares 782,733 Value ($000) $44,155 Avg Close $45.49 Range $38.59 - $53.38

Q3 2023

Shares 761,186 Value ($000) $32,921 Avg Close $40.65 Range $34.46 - $45.59

Q2 2023

Shares 736,574 Value ($000) $28,212 Avg Close $36.02 Range $31.77 - $39.59

Q1 2023

Shares 726,422 Value ($000) $32,180 Avg Close $47.96 Range $39.01 - $52.93

Q4 2022

Shares 685,824 Value ($000) $40 Avg Close $52.03 Range $45.87 - $56.69

Q3 2022

Shares 690,556 Value ($000) $36,109 Avg Close $50.12 Range $46.08 - $54.37

Q2 2022

Shares 682,951 Value ($000) $38,013 Avg Close $51.14 Range $48.47 - $53.70

Q1 2022

Shares 676,037 Value ($000) $40,900 Avg Close $51.69 Range $48.38 - $55.12

Q4 2021

Shares 667,082 Value ($000) $38,510 Avg Close $48.46 Range $45.96 - $50.44

Q3 2021

Shares 665,708 Value ($000) $37,453 Avg Close $48.00 Range $45.58 - $50.22

Q2 2021

Shares 676,158 Value ($000) $39,237 Avg Close $52.96 Range $48.87 - $55.24

Q1 2021

Shares 679,158 Value ($000) $42,639 Avg Close $51.31 Range $45.76 - $56.46

Q4 2020

Shares 711,883 Value ($000) $39,359 Avg Close $46.10 Range $42.70 - $50.73

Q3 2020

Shares 724,426 Value ($000) $39,373 Avg Close $48.57 Range $43.00 - $54.06

Q2 2020

Shares 744,211 Value ($000) $42,730 Avg Close $48.00 Range $42.78 - $54.53

Q1 2020

Shares 755,129 Value ($000) $44,387 Avg Close $50.93 Range $38.54 - $56.36

Q4 2019

Shares 750,732 Value ($000) $50,878 Avg Close $53.22 Range $48.47 - $56.23

Q3 2019

Shares 749,148 Value ($000) $46,583 Avg Close $50.16 Range $47.48 - $52.86

Q2 2019

Shares 746,670 Value ($000) $46,002 Avg Close $49.98 Range $47.55 - $52.33

Q1 2019

Shares 742,351 Value ($000) $45,878 Avg Close $49.51 Range $43.81 - $52.00

Q4 2018

Shares 742,424 Value ($000) $41,339 Avg Close $46.68 Range $41.39 - $50.57

Q3 2018

Shares 722,662 Value ($000) $43,475 Avg Close $48.42 Range $42.38 - $51.15

Q2 2018

Shares 708,437 Value ($000) $40,035 Avg Close $45.23 Range $42.53 - $47.73

Q1 2018

Shares 664,128 Value ($000) $38,573 Avg Close $46.10 Range $42.86 - $48.73

Q4 2017

Shares 665,679 Value ($000) $39,642 Avg Close $45.39 Range $41.22 - $49.73

Q3 2017

Shares 667,379 Value ($000) $39,735 Avg Close $41.22 Range $37.95 - $46.20

Q2 2017

Shares 670,371 Value ($000) $37,569 Avg Close $41.48 Range $38.41 - $44.70

Q1 2017

Shares 672,331 Value ($000) $37,537 Avg Close $43.50 Range $40.27 - $48.84

Q4 2016

Shares 677,497 Value ($000) $42,635 Avg Close $42.49 Range $35.31 - $49.16

Q3 2016

Shares 679,354 Value ($000) $34,565 Avg Close $36.26 Range $34.29 - $38.21

Q2 2016

Shares 682,272 Value ($000) $33,608 Avg Close $35.72 Range $33.77 - $38.30

Q1 2016

Shares 683,206 Value ($000) $33,280 Avg Close $33.33 Range $29.47 - $37.02

Q4 2015

Shares 758,107 Value ($000) $35,443 Avg Close $33.66 Range $30.28 - $36.28

Q3 2015

Shares 706,435 Value ($000) $31,394 Avg Close $34.11 Range $30.99 - $37.49

Q2 2015

Shares 588,838 Value ($000) $29,825 Avg Close $32.83 Range $29.86 - $37.32

Q1 2015

Shares 565,499 Value ($000) $24,435 Avg Close $30.86 Range $28.78 - $34.76

Q4 2014

Shares 479,982 Value ($000) $23,529 Avg Close $33.70 Range $29.79 - $36.02

Q3 2014

Shares 420,142 Value ($000) $19,545 Avg Close $33.99 Range $32.17 - $37.33

Q2 2014

Shares 421,440 Value ($000) $22,033 Avg Close $35.20 Range $33.12 - $38.02

Q1 2014

Shares 422,540 Value ($000) $22,850 Avg Close $35.67 Range $33.22 - $38.53

Q4 2013

Shares 405,098 Value ($000) $22,872 Avg Close $36.29 Range $32.69 - $39.26

Q3 2013

Shares 386,954 Value ($000) $19,246 Avg Close $32.64 Range $30.72 - $34.37

Q2 2013

Shares 368,340 Value ($000) $16,830 Avg Close $29.77 Range $27.86 - $31.27

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	897,572	$42,932	$47.37	$44.09 - $50.85
Q3 2025	894,194	$44,700	$48.41	$45.39 - $50.63
Q2 2025	887,721	$43,002	$46.41	$40.44 - $50.21
Q1 2025	885,080	$44,810	$48.88	$46.41 - $51.42
Q4 2024	875,300	$45,919	$50.92	$44.42 - $57.25
Q3 2024	865,372	$42,766	$47.96	$44.53 - $54.88
Q2 2024	861,398	$41,801	$44.71	$41.94 - $47.91
Q1 2024	819,557	$40,060	$44.93	$40.74 - $52.58
Q4 2023	782,733	$44,155	$45.49	$38.59 - $53.38
Q3 2023	761,186	$32,921	$40.65	$34.46 - $45.59
Q2 2023	736,574	$28,212	$36.02	$31.77 - $39.59
Q1 2023	726,422	$32,180	$47.96	$39.01 - $52.93
Q4 2022	685,824	$40	$52.03	$45.87 - $56.69
Q3 2022	690,556	$36,109	$50.12	$46.08 - $54.37
Q2 2022	682,951	$38,013	$51.14	$48.47 - $53.70
Q1 2022	676,037	$40,900	$51.69	$48.38 - $55.12
Q4 2021	667,082	$38,510	$48.46	$45.96 - $50.44
Q3 2021	665,708	$37,453	$48.00	$45.58 - $50.22
Q2 2021	676,158	$39,237	$52.96	$48.87 - $55.24
Q1 2021	679,158	$42,639	$51.31	$45.76 - $56.46
Q4 2020	711,883	$39,359	$46.10	$42.70 - $50.73
Q3 2020	724,426	$39,373	$48.57	$43.00 - $54.06
Q2 2020	744,211	$42,730	$48.00	$42.78 - $54.53
Q1 2020	755,129	$44,387	$50.93	$38.54 - $56.36
Q4 2019	750,732	$50,878	$53.22	$48.47 - $56.23
Q3 2019	749,148	$46,583	$50.16	$47.48 - $52.86
Q2 2019	746,670	$46,002	$49.98	$47.55 - $52.33
Q1 2019	742,351	$45,878	$49.51	$43.81 - $52.00
Q4 2018	742,424	$41,339	$46.68	$41.39 - $50.57
Q3 2018	722,662	$43,475	$48.42	$42.38 - $51.15
Q2 2018	708,437	$40,035	$45.23	$42.53 - $47.73
Q1 2018	664,128	$38,573	$46.10	$42.86 - $48.73
Q4 2017	665,679	$39,642	$45.39	$41.22 - $49.73
Q3 2017	667,379	$39,735	$41.22	$37.95 - $46.20
Q2 2017	670,371	$37,569	$41.48	$38.41 - $44.70
Q1 2017	672,331	$37,537	$43.50	$40.27 - $48.84
Q4 2016	677,497	$42,635	$42.49	$35.31 - $49.16
Q3 2016	679,354	$34,565	$36.26	$34.29 - $38.21
Q2 2016	682,272	$33,608	$35.72	$33.77 - $38.30
Q1 2016	683,206	$33,280	$33.33	$29.47 - $37.02
Q4 2015	758,107	$35,443	$33.66	$30.28 - $36.28
Q3 2015	706,435	$31,394	$34.11	$30.99 - $37.49
Q2 2015	588,838	$29,825	$32.83	$29.86 - $37.32
Q1 2015	565,499	$24,435	$30.86	$28.78 - $34.76
Q4 2014	479,982	$23,529	$33.70	$29.79 - $36.02
Q3 2014	420,142	$19,545	$33.99	$32.17 - $37.33
Q2 2014	421,440	$22,033	$35.20	$33.12 - $38.02
Q1 2014	422,540	$22,850	$35.67	$33.22 - $38.53
Q4 2013	405,098	$22,872	$36.29	$32.69 - $39.26
Q3 2013	386,954	$19,246	$32.64	$30.72 - $34.37
Q2 2013	368,340	$16,830	$29.77	$27.86 - $31.27