Research cutoff: September 26, 2026. A banking app can look simple while the company behind it owns loans, buys deposits, pays for technology, or depends on another bank to hold customer money. A stock investor needs to identify those activities before using a customer-count headline as an investment thesis. This guide is a filing-first method for researching digital bank and neobank shares; it does not rank stocks or predict prices.
Start with the legal business model, then follow funding, credit losses and capital. Fast account growth can coexist with expensive deposits or weak loan performance. Conversely, slower customer growth may reflect a deliberate change in lending or funding strategy. The right comparison is not “which app looks better?” but “which economic risks does each shareholder own?”
Is it a bank, a nonbank app, or both?
Find the public parent company, operating subsidiaries and bank charter, if any, in the annual report. Some businesses own an insured bank; others provide a user interface while a partner bank holds eligible deposits. The FDIC’s guidance on third-party banking apps explains that a nonbank is not itself FDIC-insured and that possible pass-through coverage depends on funds reaching an insured bank and other conditions, including records of beneficial ownership. Use the FDIC’s BankFind to check a claimed U.S. insured bank.
Deposit protection and shareholder risk are different questions: FDIC insurance does not insure a fintech company’s stock, earnings, platform uptime or nonbank failure. For an investor, the legal structure affects who owns loans, who earns interest, who pays for deposits, and who bears compliance and partner risk. Avoid assuming that two apps with similar screens have the same balance sheet.
Open the filing before the presentation
The SEC’s 10-K and 10-Q reading guide points to financial statements, management discussion, market risk and risk factors. Read the most recent annual filing and later interim reports, then use an earnings release to clarify rather than replace them. Note the fiscal period and accounting basis. A foreign issuer may use Form 20-F and furnish interim results on Form 6-K instead of following the U.S. domestic 10-Q pattern.
For a dated example, SoFi’s June 2026 Form 10-Q, linked from its investor-relations site separates Lending, Financial Services and Technology Platform activities and includes notes on loans, credit losses, deposits, funding and segment results. Nu Holdings’ June 2026 issuer results report IFRS financials across Brazil, Mexico and Colombia. They are examples of what to inspect, not peer recommendations or directly comparable ratios. Check each firm’s later filings before making a current judgment.
Break revenue into activities
Separate net interest income from interchange, subscription, brokerage, servicing, software and other fees. The drivers differ. Lending income depends on loan balances, yields, funding cost and credit performance. Payment fees depend on actual transaction activity, not merely registered users. Technology contracts depend on client volume, pricing and retention. For a diversified platform, a single “members” number can hide which segment earns the cash and which consumes it.
Read the segment note and reconcile management-defined metrics with reported revenue and net income. If “adjusted revenue” or a risk-adjusted margin is emphasized, locate its definition and reconciliation. Neither U.S. GAAP nor IFRS net income should be silently replaced with a company’s preferred performance label. A change in segment definitions or customer counting can also make a year-over-year chart less comparable than it first appears.
Follow deposits and other funding
For a deposit-taking bank, record total deposits, interest paid, account mix, uninsured amounts and reliance on wholesale funding. A growing deposit base can support lending, but promotional rates can make that funding expensive. Compare the pace of loan growth with deposit growth and liquid assets. A nonbank lender may instead rely on warehouse lines, securitizations or loan sales; inspect renewal terms, collateral and maturity dates in its filings. Our interest-rate guide explains why changes in market rates can alter both asset yields and funding costs.
A simple hypothetical illustrates sensitivity. Suppose a bank has $10 billion of average interest-earning assets yielding 7% and $8 billion of interest-bearing funding costing 4%. Annualized interest income would be $700 million and funding expense $320 million, leaving $380 million of net interest income before credit losses and operating costs. If funding cost alone rose one percentage point, that expense would rise $80 million, all else equal. Real banks have changing balances, fixed-rate assets, noninterest deposits and hedges; this is arithmetic, not a forecast.
Look at loss recognition, not just origination growth
Trace loan originations to loans retained, sold or securitized. Review delinquency trends, charge-offs, provisions, reserves and loan vintages by product where disclosed. A rapid increase in lending can boost current revenue while the full loss experience appears later. Read the accounting note before comparing credit ratios: loans at amortized cost and loans carried at fair value can affect where changes appear in the statements. A credit-card lender and a secured-mortgage lender also have different loss patterns.
Nu’s 2026 disclosure illustrates why geographic and currency context matters: its operating entities work in different countries, while the parent reports consolidated U.S.-dollar results under IFRS. Its issuer results also provide late-payment measures that require the company’s definitions and period comparisons. Do not apply a U.S. deposit-insurance rule to its non-U.S. customers or compare an IFRS provision directly with a U.S. GAAP metric without reading the notes.
Check capital, cash and shareholder dilution
Look for regulatory capital ratios where applicable, parent-company liquidity, debt maturities and any restrictions on moving cash between subsidiaries. Profit at a regulated bank subsidiary may not be freely available to the public holding company. Read share-based compensation, new share issuance and convertible securities alongside earnings per share. A rising aggregate profit can coexist with weak per-share progress if the share count grows quickly.
Then build a short monitoring sheet: business model, latest filing date, deposit and funding mix, credit-loss trend, segment profit, capital position, share count, and one issuer-specific risk that could falsify the thesis. Our earnings-report guide helps distinguish a reported result from guidance or an adjusted measure. Revisit the sheet after each actual filing instead of changing a price target because of a headline.
Frequently asked questions
Does FDIC insurance protect a digital bank stock?
No. Eligible deposits at an insured bank can have FDIC protection under its rules, but shares in a bank or fintech company are investments that can lose value.
Is customer growth enough to judge a neobank?
No. Compare active use, revenue per customer, funding costs, credit losses, expenses, capital needs and the company’s own metric definitions.
Can I compare two digital banks by one margin figure?
Not safely. Check each firm’s products, accounting basis, loan valuation, funding mix and definition of the reported margin before comparing periods or peers.
Educational information only; not individualized investment advice. All numerical examples are hypothetical. Company filings, bank status and regulations can change after the stated research cutoff.