FinObservatory

SEC filings / CIK 311094

WESTAMERICA BANCORPORATION

National commercial banks, CA. 16 10-K filer-years in this dataset, the most recent for FY2025, filed Feb 27, 2026. Every figure below is as filed by the company and untouched: FinObservatory has not restated, rescaled or corrected anything, and a blank is a fact the filing does not tag, not a zero.

This is the SEC holding company, identified by its Central Index Key. It is not the insured bank subsidiary that appears in /banks and /deposits, which are FDIC call-report entities on a different consolidation. Nothing here should be compared line for line with those.

Held-to-maturity gap against reported equity

The fair value of the held-to-maturity book minus its carrying amount, divided by the stockholders’ equity the same filing reports. Years marked n/a are years in which the filing does not tag one of the three.

-8-5-30358FY2010: HTM fair value less carrying amount, +2.6% of reported stockholders’ equityFY2011: HTM fair value less carrying amount, +4.4% of reported stockholders’ equityFY2012: HTM fair value less carrying amount, +5.1% of reported stockholders’ equityFY2013: HTM fair value less carrying amount, -3.6% of reported stockholders’ equityFY2014: HTM fair value less carrying amount, +1.9% of reported stockholders’ equityFY2015: HTM fair value less carrying amount, +1.8% of reported stockholders’ equityFY2016: HTM fair value less carrying amount, -1.0% of reported stockholders’ equityFY2017: HTM fair value less carrying amount, -0.6% of reported stockholders’ equityFY2018: HTM fair value less carrying amount, -2.1% of reported stockholders’ equityFY2019: HTM fair value less carrying amount, +0.9% of reported stockholders’ equityFY2020: HTM fair value less carrying amount, +1.7% of reported stockholders’ equityFY2021: HTM fair value less carrying amount, +0.7% of reported stockholders’ equityFY2022: HTM fair value less carrying amount, -7.0% of reported stockholders’ equityFY2023: HTM fair value less carrying amount, -3.7% of reported stockholders’ equityFY2024: HTM fair value less carrying amount, -4.1% of reported stockholders’ equityFY2025 (partial): HTM fair value less carrying amount, -0.7% of reported stockholders’ equity10111213141516171819202122232425Fiscal year of the 10-K% of reported stockholders’ equity

The gap is computable for 16 of this company’s 16 filings. In 5 of the 16 filings the carrying amount is tagged with a company-invented element rather than a us-gaap one, so a standard-taxonomy screen would return no carrying amount for those years.

Source: SEC Financial Statement Data Sets, US Securities and Exchange Commission, Division of Economic and Risk Analysis. Facts as filed: uncleaned, unrestated, not audited by FinObservatory. Selection: consolidated USD balance-sheet instants at each filing's own period end, from this company's 10-K submissions with prevrpt = 0. Methodology

Filing history, as filed

FYFiledAssetsDepositsEquityAOCIHTM carryingHTM fair valueGap, % of equityCustom facts
2025pFeb 27, 2026$5.96bn$4.84bn$933.5m-$91.1m$819.6m$812.6m-0.7%4.4%
2024Feb 28, 2025$6.08bn$5.01bn$890.0m-$168.1m$844.6mext$807.8m-4.1%5.1%
2023Feb 29, 2024$6.36bn$5.47bn$772.9m-$190.3m$878.4mext$849.6m-3.7%2.4%
2022Mar 1, 2023$6.95bn$6.23bn$602.1m-$256.1m$915.9mext$873.5m-7.0%2.8%
2021Feb 28, 2022$7.46bn$6.41bn$827.1m$49.7m$306.4mext$312.6m+0.7%4.2%
2020Feb 25, 2021$6.75bn$5.69bn$844.8m$114.4m$515.6mext$529.7m+1.7%4.8%
2019Feb 28, 2020$5.62bn$4.81bn$731.4m$26.1m$738.1m$744.3m+0.9%6.0%
2018Feb 28, 2019$5.57bn$4.87bn$615.6m-$40.0m$984.6m$971.4m-2.1%8.3%
2017Feb 27, 2018$5.51bn$4.83bn$590.2m-$16.8m$1.16bn$1.16bn-0.6%9.5%
2016Feb 28, 2017$5.37bn$4.70bn$561.4m-$10.1m$1.35bn$1.34bn-1.0%7.9%
2015Feb 26, 2016$5.17bn$4.54bn$532.2m$675k$1.32bn$1.33bn+1.8%7.4%
2014Mar 2, 2015$5.04bn$4.35bn$526.6m$5.3m$1.04bn$1.05bn+1.9%8.1%
2013Feb 27, 2014$4.85bn$4.16bn$542.9m$4.3m$1.13bn$1.11bn-3.6%7.0%
2012Feb 28, 2013$4.95bn$4.23bn$560.1m$14.6m$1.16bn$1.18bn+5.1%7.4%
2011Feb 28, 2012$5.04bn$4.25bn$558.6m$11.4m$922.8m$947.5m+4.4%10.0%
2010Feb 28, 2011$4.93bn$4.13bn$545.3m$159k$580.7m$594.7m+2.6%15.0%

ext marks a carrying amount tagged with a company-invented element. p marks FY2025, which the dataset’s filing window (closing Mar 31, 2026) leaves incomplete across filers. “Custom facts” is the share of that filing’s consolidated facts carrying a company-invented tag, in any unit.

Source: SEC Financial Statement Data Sets, US Securities and Exchange Commission, Division of Economic and Risk Analysis. Facts as filed: uncleaned, unrestated, not audited by FinObservatory. Selection: this company's 10-K submissions with prevrpt = 0, one per fiscal year by latest filed date; consolidated USD instants at each filing's period end. Dollar columns are raw US dollars. Methodology

What this page cannot tell you

  • A blank in the held-to-maturity columns means the filing does not tag that fact on the consolidated face. It does not mean the company holds no held-to-maturity securities, and this dataset cannot distinguish the two.
  • A held-to-maturity gap is not a realised loss. Held to maturity, the securities pay par. The gap measures how far the reported equity sits from a mark-to-market equity, which becomes a solvency question only if the book must be sold.
  • AOCI is not the held-to-maturity mark. It bundles available-for-sale marks, hedge marks, pension and translation, net of tax. Do not add the two columns.
  • Every value is as filed. A scale error, sign error or mis-tag by the company is reproduced here exactly as the company made it.

Pages exist for the 650 bank and thrift holding companies with at least one 10-K from FY2015 onward, out of 900 with a 10-K anywhere in the dataset.