WESTAMERICA BANCORPORATION

Ticker: WABC CUSIP: 957090103 Class: Common Stock

MARSHALL WACE, LLP's Holding History (CIK: 0001318757)

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

Q4 2025
Shares 11,128 Value ($000) $532 Avg Close $47.37 Range $44.09 - $50.85
Q2 2025
Shares 19,455 Value ($000) $942 Avg Close $46.41 Range $40.44 - $50.21
Q3 2023
Shares 15,809 Value ($000) $684 Avg Close $40.65 Range $34.46 - $45.59
Q2 2023
Shares 103,648 Value ($000) $3,970 Avg Close $36.02 Range $31.77 - $39.59
Q1 2023
Shares 94,906 Value ($000) $4,204 Avg Close $47.96 Range $39.01 - $52.93
Q4 2022
Shares 133,114 Value ($000) $7,855 Avg Close $52.03 Range $45.87 - $56.69
Q3 2022
Shares 56,479 Value ($000) $2,953 Avg Close $50.12 Range $46.08 - $54.37
Q2 2022
Shares 34,918 Value ($000) $1,944 Avg Close $51.14 Range $48.47 - $53.70
Q3 2021
Shares 15,817 Value ($000) $890 Avg Close $48.00 Range $45.58 - $50.22
Q1 2021
Shares 61,985 Value ($000) $3,891 Avg Close $51.31 Range $45.76 - $56.46
Q4 2020
Shares 110,991 Value ($000) $6,137 Avg Close $46.10 Range $42.70 - $50.73
Q3 2020
Shares 119,307 Value ($000) $6,484 Avg Close $48.57 Range $43.00 - $54.06
Q2 2020
Shares 119,970 Value ($000) $6,889 Avg Close $48.00 Range $42.78 - $54.53
Q2 2015
Shares 22,000 Value ($000) $1,114 Avg Close $32.83 Range $29.86 - $37.32
Q2 2014
Shares 5,000 Value ($000) $261 Avg Close $35.20 Range $33.12 - $38.02