Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

WESTAMERICA BANCORPORATION

CIK 0000311094WABC· quarter ending 2026-06-30
Shares outstanding
23,111,153
Held by 13F filers
18,458,300
79.9% of shares outstanding
Holders
214
+10 vs 2026-03-31 · 36 new, 26 exited
Value
$1.1B
shares -0.5% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-05, as of 2026-07-30)

ClassListedShares outstandingHeld by 13F filers% of classHoldersCUSIP
Common stockWABC · NASDAQ23,111,15318,458,30079.9%214957090103

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine
CountCUSIPClass (as filers write it)HoldersShares heldClass shares% of classValueOptionsMapped via
957090103COM21418,458,30023,111,15379.9%$1.1B2 call / 0 put13DGholders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (214 of 214 · 957090103)

change vs 2026-03-31
#FilerShares% of classValueChange
1BlackRock, Inc.3,335,70314.43%$195.7M-113,632 (-3.3%)
2AMERICAN CENTURY COMPANIES INC1,958,0728.47%$114.9M+51,202 (+2.7%)
3VANGUARD PORTFOLIO MANAGEMENT LLC1,720,6457.45%$101.0M-38,905 (-2.2%)
4STATE STREET CORP1,394,0746.03%$81.8M+190,791 (+15.9%)
5VANGUARD CAPITAL MANAGEMENT LLC1,034,5314.48%$60.7M-60,547 (-5.5%)
6DIMENSIONAL FUND ADVISORS LP983,6394.26%$57.7M+38,940 (+4.1%)
7GEODE CAPITAL MANAGEMENT, LLC627,0732.71%$36.8M+13,911 (+2.3%)
8AQR CAPITAL MANAGEMENT LLC495,2232.14%$29.1M+96,177 (+24.1%)
9Nuveen, LLC382,2881.65%$22.4M+22,943 (+6.4%)
10Rhino Investment Partners, Inc324,8241.41%$19.1MNEW
11ARROWSTREET CAPITAL, LIMITED PARTNERSHIP324,1911.40%$19.0M+40,382 (+14.2%)
12TWO SIGMA INVESTMENTS, LP303,8361.31%$17.8M-49,196 (-13.9%)
13NORTHERN TRUST CORP303,4221.31%$17.8M+14,445 (+5.0%)
14CHARLES SCHWAB INVESTMENT MANAGEMENT INC294,9301.28%$17.3M-2,995 (-1.0%)
15RBO & CO LLC275,5511.19%$16.2M-6,647 (-2.4%)
16MACKENZIE FINANCIAL CORP242,8611.05%$14.2MNEW
17MORGAN STANLEY229,9981.00%$13.5M-25,158 (-9.9%)
18GOLDMAN SACHS GROUP INC228,4650.99%$13.4M+1,745 (+0.8%)
19Bank of New York Mellon Corp211,4660.91%$12.4M+1,953 (+0.9%)
20T. Rowe Price Investment Management, Inc.193,9950.84%$11.4M-1,847 (-0.9%)
21VANGUARD FIDUCIARY TRUST CO154,7020.67%$9.1M-5,231 (-3.3%)
22PRINCIPAL FINANCIAL GROUP INC147,7470.64%$8.7M-3,402 (-2.3%)
23Leeward Investments, LLC - MA135,2840.59%$7.9M-2,896 (-2.1%)
24UBS Group AG132,5540.57%$7.8M-27,307 (-17.1%)
25Invesco Ltd.122,7480.53%$7.2M-9,470 (-7.2%)
26FIRST TRUST ADVISORS LP115,5500.50%$6.8M-15,432 (-11.8%)
27NEW YORK STATE COMMON RETIREMENT FUND112,9890.49%$6.6M-16,429 (-12.7%)
28Qube Research & Technologies Ltd109,2980.47%$6.4M-62,082 (-36.2%)
29CITADEL ADVISORS LLC108,5090.47%$6.4M-16,073 (-12.9%)
30FRANKLIN RESOURCES INC88,9090.38%$5.2M+3,811 (+4.5%)
31Man Group plc87,6920.38%$5.1M+7,040 (+8.7%)
32RAYMOND JAMES FINANCIAL INC81,4070.35%$4.8M+47 (+0.1%)
33Public Sector Pension Investment Board80,7440.35%$4.7M-7,363 (-8.4%)
34BANK OF AMERICA CORP /DE/74,3090.32%$4.4M-12,075 (-14.0%)
35RENAISSANCE TECHNOLOGIES LLC72,4990.31%$4.3M-79,932 (-52.4%)
36WINTON GROUP Ltd69,0330.30%$4.1M+22,456 (+48.2%)
37RHUMBLINE ADVISERS63,4790.27%$3.7M-13,990 (-18.1%)
38IEQ CAPITAL, LLC60,9770.26%$3.6M+234 (+0.4%)
39Legal & General Group Plc53,9100.23%$3.2M-3,944 (-6.8%)
40MALTESE CAPITAL MANAGEMENT LLC47,5000.21%$2.8M-12,040 (-20.2%)
41AMERIPRISE FINANCIAL INC46,7870.20%$2.7M-3,209 (-6.4%)
42ACADIAN ASSET MANAGEMENT LLC45,3030.20%$2.7MNEW
43Swiss National Bank45,0000.19%$2.6M-1,900 (-4.1%)
44PRICE T ROWE ASSOCIATES INC /MD/43,4460.19%$2.5M+7,262 (+20.1%)
45DARK FOREST CAPITAL MANAGEMENT LP43,1300.19%$2.5M+12,856 (+42.5%)
46UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC39,7260.17%$2.3M-3,774 (-8.7%)
47ROYCE & ASSOCIATES LP39,4110.17%$2.3M-3,523 (-8.2%)
48IFG Advisory, LLC37,9720.16%$2.2MNEW
49JACOBS LEVY EQUITY MANAGEMENT, INC36,9410.16%$2.2M-7,350 (-16.6%)
50COMMONWEALTH EQUITY SERVICES, LLC36,4170.16%$2.1M+60 (+0.2%)
51VOYA INVESTMENT MANAGEMENT LLC36,2920.16%$2.1M+863 (+2.4%)
52Destination Wealth Management36,1680.16%$2.1MNEW
53XTX Topco Ltd34,4330.15%$2.0M+14,766 (+75.1%)
54JPMORGAN CHASE & CO31,5760.14%$1.9M-3,745 (-10.6%)
55ALLIANCEBERNSTEIN L.P.29,5810.13%$1.5M+61 (+0.2%)
56Mariner, LLC27,3990.12%$1.6M+7,206 (+35.7%)
57Connor, Clark & Lunn Investment Management Ltd.27,0600.12%$1.6M+4,243 (+18.6%)
58WELLS FARGO & COMPANY/MN26,8630.12%$1.6M+13,017 (+94.0%)
59CITIGROUP INC26,7940.12%$1.6M+7,699 (+40.3%)
60LPL Financial LLC26,7600.12%$1.6M-432 (-1.6%)
61Cerity Partners LLC26,7380.12%$1.6M+562 (+2.1%)
62CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM26,0700.11%$1.5M+7,044 (+37.0%)
63DEUTSCHE BANK AG\25,2250.11%$1.5M+204 (+0.8%)
64PRUDENTIAL FINANCIAL INC24,5120.11%$1.4M-1,140 (-4.4%)
65Creative Planning24,3550.11%$1.4M+18,658 (+327.5%)
66BNP PARIBAS FINANCIAL MARKETS21,0590.09%$1.2M-18,967 (-47.4%)
67SEI INVESTMENTS CO19,6120.08%$1.2M+2,885 (+17.2%)
68CANADA LIFE ASSURANCE Co19,5460.08%$1.1M-2,306 (-10.6%)
69BARCLAYS PLC19,4310.08%$1.1M+6,996 (+56.3%)
70MERCER GLOBAL ADVISORS INC /ADV18,4660.08%$1.1M+7,393 (+66.8%)
71WEALTH ENHANCEMENT ADVISORY SERVICES, LLC18,1310.08%$1.1M+4,585 (+33.8%)
72VANGUARD ASSET MANAGEMENT, Ltd17,9230.08%$1.1M+3,247 (+22.1%)
73SG Americas Securities, LLC17,8610.08%$1.0M-27,310 (-60.5%)
74State of Tennessee, Department of Treasury17,6020.08%$1.0M-14,439 (-45.1%)
75Russell Investments Group, Ltd.17,0350.07%$999K+15,183 (+819.8%)
76Cypress Wealth Services, LLC16,6130.07%$975K-5,162 (-23.7%)
77Assenagon Asset Management S.A.16,2720.07%$955K-18,920 (-53.8%)
78Rafferty Asset Management, LLC16,1000.07%$945K+945 (+6.2%)
79Quantinno Capital Management LP15,5270.07%$911K+6,347 (+69.1%)
80Thrivent Financial for Lutherans15,4240.07%$905K-1,011 (-6.2%)
81ROYAL BANK OF CANADA15,0310.07%$881K-8 (-0.1%)
82Horizon Investments, LLC14,4310.06%$840K+383 (+2.7%)
83SummerHaven Investment Management, LLC14,3680.06%$843K—
84MetLife Investment Management, LLC13,9620.06%$819K+1,227 (+9.6%)
85KLP KAPITALFORVALTNING AS13,7000.06%$804K—
86OSAIC HOLDINGS, INC.13,6570.06%$801K+13,367 (+4609.3%)
87STIFEL FINANCIAL CORP13,2340.06%$776K+110 (+0.8%)
88Illinois Municipal Retirement Fund12,8320.06%$753K-141 (-1.1%)
89Polymer Capital Management (US) LLC12,6980.05%$745KNEW
90SUSQUEHANNA INTERNATIONAL GROUP, LLP12,3170.05%$723K-7,912 (-39.1%)
91Odyssean, LLC12,1670.05%$714K—
92Jupiter Topco LLC11,7480.05%$689KNEW
93Campbell & CO Investment Adviser LLC11,7480.05%$689KNEW
94Hennion & Walsh Asset Management, Inc.11,6930.05%$686K-413 (-3.4%)
95Inspire Investing, LLC11,5760.05%$679K+1,725 (+17.5%)
96Atom Investors LP11,1470.05%$654KNEW
97MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.10,9800.05%$644K-166 (-1.5%)
98TEACHER RETIREMENT SYSTEM OF TEXAS10,4200.05%$611K+6,107 (+141.6%)
99Perigon Wealth Management, LLC10,3240.04%$606K-176 (-1.7%)
100Louisiana State Employees Retirement System10,3000.04%$604K-600 (-5.5%)
101NEUBERGER BERMAN GROUP LLC10,0910.04%$592K+995 (+10.9%)
102D. E. Shaw & Co., Inc.9,6930.04%$569K+4,144 (+74.7%)
103MANUFACTURERS LIFE INSURANCE COMPANY, THE9,2850.04%$545K-369 (-3.8%)
104State of Alaska, Department of Revenue8,7830.04%$514K-4,420 (-33.5%)
105O'SHAUGHNESSY ASSET MANAGEMENT, LLC8,7740.04%$515K-1,945 (-18.1%)
106Vanguard Global Advisers, LLC8,3410.04%$489K-5,917 (-41.5%)
107LSV ASSET MANAGEMENT7,9950.03%$469KNEW
108PANAGORA ASSET MANAGEMENT INC7,9260.03%$465K—
109VICTORY CAPITAL MANAGEMENT INC7,8340.03%$460K+81 (+1.0%)
110STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM7,3140.03%$429K—
111Police & Firemen's Retirement System of New Jersey7,0720.03%$415K—
112Vanguard Investments Australia, Ltd.7,0560.03%$414K-906 (-11.4%)
113CAPTRUST FINANCIAL ADVISORS6,8100.03%$400K+1,934 (+39.7%)
114SAM Advisors, LLC6,7940.03%$399K—
115Y-Intercept (Hong Kong) Ltd6,6030.03%$387K+2,601 (+65.0%)
116CANADA PENSION PLAN INVESTMENT BOARD6,6000.03%$387K—
117TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY6,4420.03%$378K—
118Centiva Capital, LP6,3710.03%$374KNEW
119AMALGAMATED BANK6,3210.03%$371K-756 (-10.7%)
120YOUSIF CAPITAL MANAGEMENT, LLC6,2990.03%$370K-246 (-3.8%)
121ARIZONA STATE RETIREMENT SYSTEM6,1940.03%$363K-313 (-4.8%)
122iSAM Funds (UK) Ltd6,1000.03%$358KNEW
123Curi Capital, LLC6,0530.03%$355K—
124Corient Private Wealth LP5,9640.03%$350KNEW
125INTECH INVESTMENT MANAGEMENT LLC5,6330.02%$330K-876 (-13.5%)
126Handelsbanken Fonder AB5,5300.02%$324K—
127OREGON PUBLIC EMPLOYEES RETIREMENT FUND5,3240.02%$312K-300 (-5.3%)
128MEEDER ASSET MANAGEMENT INC5,2180.02%$306K-2,909 (-35.8%)
129West Wealth Group, LLC5,1840.02%$304K—
130FIFTH THIRD BANCORP5,1180.02%$300K-354 (-6.5%)
131Zurcher Kantonalbank (Zurich Cantonalbank)5,0880.02%$299K—
132Allianz Asset Management GmbH5,0800.02%$298K—
133WHITTIER TRUST CO4,9790.02%$295K+4,479 (+895.8%)
134Allworth Financial LP4,9230.02%$289K+545 (+12.4%)
135Quadrature Capital Ltd4,7060.02%$276KNEW
136Swiss Life Asset Management Ltd4,6150.02%$271KNEW
137Merit Financial Group, LLC4,5950.02%$270KNEW
138VIRGINIA RETIREMENT SYSTEMS ET Al4,2000.02%$246KNEW
139BRIGHTON JONES LLC4,0440.02%$237KNEW
140US BANCORP \DE\4,0000.02%$235K-300 (-7.0%)
141One Capital Management, LLC4,0000.02%$209K—
142Arax Advisory Partners3,9510.02%$232K+3,807 (+2643.8%)
143Schonfeld Strategic Advisors LLC3,9100.02%$229K-3,705 (-48.7%)
144TWO SIGMA SECURITIES, LLC3,8930.02%$228K-2,414 (-38.3%)
145PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO3,7840.02%$222K—
146LOS ANGELES CAPITAL MANAGEMENT LLC3,6160.02%$212K-170 (-4.5%)
147Focus Partners Wealth3,5090.02%$206KNEW
148GAMMA Investing LLC3,3270.01%$195K+890 (+36.5%)
149Mirae Asset Global Investments Co., Ltd.2,8920.01%$170KNEW
150FMR LLC2,7620.01%$162K-9,078 (-76.7%)
151PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO2,1690.01%$127K+22 (+1.0%)
152Ameritas Investment Partners, Inc.2,0620.01%$121K—
153NISA INVESTMENT ADVISORS, LLC1,8610.01%$109K+1,419 (+321.0%)
154Farther Finance Advisors, LLC1,4900.01%$87K+13 (+0.9%)
155NEW YORK STATE TEACHERS RETIREMENT SYSTEM1,4390.01%$84K-801 (-35.8%)
156PNC Financial Services Group, Inc.1,2520.01%$73K-408 (-24.6%)
157Golden State Wealth Management, LLC1,2450.01%$73K—
158NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO1,0000.00%$59K—
159Tower Research Capital LLC (TRC)9820.00%$58K-3,439 (-77.8%)
160EverSource Wealth Advisors, LLC8770.00%$51K-336 (-27.7%)
161HANTZ FINANCIAL SERVICES, INC.7740.00%$45K+69 (+9.8%)
162Global Retirement Partners, LLC7450.00%$44KNEW
163JONES FINANCIAL COMPANIES LLLP7240.00%$43K+314 (+76.6%)
164Pinnacle Wealth Planning Services, Inc.7130.00%$42K+16 (+2.3%)
165BESSEMER GROUP INC6360.00%$38K—
166Parallel Advisors, LLC6350.00%$37K—
167Sterling Capital Management LLC4830.00%$28K-304 (-38.6%)
168IFP Advisors, Inc4820.00%$28K+73 (+17.8%)
169Essential Partners LLC3900.00%$23K-129 (-24.9%)
170Nykredit A/S3890.00%$23KNEW
171HARBOR CAPITAL ADVISORS, INC.3580.00%$21K-197 (-35.5%)
172ROTHSCHILD INVESTMENT LLC3500.00%$21K+98 (+38.9%)
173Salomon & Ludwin, LLC3170.00%$19K—
174Versant Capital Management, Inc1960.00%$11K—
175Pacific Center for Financial Services1900.00%$11K—
176Optiver Holding B.V.1800.00%$11KNEW
177Kimelman & Baird, LLC1750.00%$10K-75 (-30.0%)
178True Wealth Design, LLC1570.00%$9K+8 (+5.4%)
179UMB Bank, n.a.1550.00%$9K+9 (+6.2%)
180Quarry LP1540.00%$9K+58 (+60.4%)
181Boreal Capital Management LLC1420.00%$8K—
182Cedar Mountain Advisors, LLC1340.00%$8K—
183Smartleaf Asset Management LLC1060.00%$6K—
184NewEdge Advisors, LLC1000.00%$6K—
185MCGUIRE CAPITAL ADVISORS INC990.00%$6K—
186Fortitude Family Office, LLC990.00%$6KNEW
187SJS Investment Consulting Inc.940.00%$6K+62 (+193.8%)
188MassMutual Private Wealth & Trust, FSB810.00%$5K-19 (-19.0%)
189Mitsubishi UFJ Asset Management Co., Ltd.730.00%$4K—
190Valued Wealth Advisors LLC650.00%$4K+18 (+38.3%)
191Cornerstone Financial Management LLC580.00%$3KNEW
192Kilter Group LLC580.00%$3K—
193Larson Financial Group LLC570.00%$3K+38 (+200.0%)
194FIRST HORIZON CORP550.00%$3KNEW
195Aster Capital Management (DIFC) Ltd460.00%$3KNEW
196Osbon Capital Management LLC450.00%$3K—
197Basecamp Wealth Advisors LLC420.00%$2K+12 (+40.0%)
198Parkside Financial Bank & Trust400.00%$2K—
199Bare Financial Services, Inc380.00%$2K+16 (+72.7%)
200Rockefeller Capital Management L.P.260.00%$2K+11 (+73.3%)
201Institute for Wealth Management, LLC.210.00%$1KNEW
202Clearstead Advisors, LLC200.00%$1KNEW
203Keating Financial Advisory Services, Inc.200.00%$1K—
204Covestor Ltd170.00%$1K+5 (+41.7%)
205FARMERS & MERCHANTS INVESTMENTS INC150.00%$880—
206Wealth Enhancement Trust Services, Inc.130.00%$763NEW
207WPG Advisers, LLC100.00%$587—
208CoreCap Advisors, LLC100.00%$587NEW
209JFS WEALTH ADVISORS, LLC60.00%$353NEW
210Plante Moran Financial Advisors, LLC50.00%$293NEW
211SBI Securities Co., Ltd.30.00%$176—
212Hughes Financial Services, LLC20.00%$117NEW
213Silver Grove Financial Group, Inc.20.00%$117NEW
214Davis Capital Management10.00%$59NEW
Exited since 2026-03-31 (26 filers; largest 25 shown)
PALISADE CAPITAL MANAGEMENT, LP−304,954
JUPITER ASSET MANAGEMENT LTD−97,707
HRT FINANCIAL LP−94,687
JANE STREET GROUP, LLC−69,358
MILLENNIUM MANAGEMENT LLC−56,201
Trexquant Investment LP−38,052
CWM, LLC−26,300
Point72 Asset Management, L.P.−23,670
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND−22,713
Edgestream Partners, L.P.−17,007
Engineers Gate Manager LP−12,243
HSBC HOLDINGS PLC−11,945
JANUS HENDERSON GROUP PLC−11,748
MARSHALL WACE, LLP−7,900
Aigen Investment Management, LP−7,844
Entropy Technologies, LP−6,758
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS−6,089
GLENMEDE TRUST CO NA−4,461
MAI Capital Management−881
STRS OHIO−200
Advisory Services Network, LLC−136
TWIN PEAKS WEALTH ADVISORS, LLC−75
Root Financial Partners, LLC−49
Sound Income Strategies, LLC−39
Sunbelt Securities, Inc.−20

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting personFormFiledEventShares% of class
American Century Companies, Inc.SCHEDULE 13G/A2026-08-142026-06-301,958,0728.3%
American Century Investment Management, Inc.SCHEDULE 13G/A2026-08-142026-06-301,958,0728.3%
Stowers Institute for Medical ResearchSCHEDULE 13G/A2026-08-142026-06-301,958,0728.3%
STATE STREET CORPORATIONSCHEDULE 13G2026-08-072026-06-301,394,0745.9%
Vanguard Capital ManagementSCHEDULE 13G2026-04-302026-03-311,278,3265.28%
Vanguard Portfolio ManagementSCHEDULE 13G2026-04-292026-03-311,773,1317.33%
The Vanguard GroupSCHEDULE 13G/A2026-03-272026-03-1300%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.