PROSPERITY BANCSHARES, INC. (PB): what the price assumes

In the published model solve dated 2026-Q2, anchored at $72.30, PROSPERITY BANCSHARES, INC. (PB) is priced for 9.5% return on equity. boothcheck publishes no house fair value, target price, or buy/sell rating; individual model outputs and user-controlled scenarios are analytical inputs, not Boothcheck targets. Narrative composed 2026-06-27.

Generated: 2026-08-30 · Source: https://boothcheck.com/report/PB

Headline

What The Price Assumes (Inversion)

The assumption today's price embeds, recovered by inverting the valuation.

Solve inputs: computed at a 9.2% cost of equity with 4% terminal growth over a 10-year stage, on common book equity (FY2026).

How unusual the bet is: within-range

Valuation X-Ray

The price is supported by earnings-power value. A value/asset-supported name, not a pure growth bet.

How the valuation models price the stock relative to the market price. Price/FV above 1.0 means the market pays more than that lens defends (expensive); at or below 1.0 the lens can defend the price.

Families that justify the price: Earnings

The models below discount at their own flat-beta convention rates (cost of equity 9.3%, WACC 5.5%); the inversion above states its own rate.

Per-Model Detail (n=6)

Economic-Unit Decomposition (Sum Of The Parts)

The issuer is a funded financial business. Debt, interest, and cash flows are operating inputs, so industrial EV, net-debt, WACC, and free-cash-flow lenses do not apply; value the common-equity claim with book, earnings, capital, and payout economics.

No unit-level total common-equity value is stated. Each financial unit requires supported standalone common equity, normalized earnings, capital adequacy, and payout capacity. Consolidated debt, interest, and cash are operating balances, not an enterprise-to-equity bridge; company-level book, earnings, capital, and payout lenses remain the coherent cross-checks.

Solvency

Deposit/float-funded balance sheet: debt is funding, not corporate leverage, and GAAP operating cash flow follows loan flows. Net-debt, interest-coverage, and cash-burn lenses do not apply. The solvency frame for a financial is regulatory capital and payout capacity (CET1, stress buffer, dividends plus buybacks against earnings).

Bullet Takeaways

• Prosperity Bancshares is a Texas regional bank whose earnings are turning on margin: net interest margin expanded 21 basis points to 3.51% in the first quarter of 2026, the lever that drives a bank's profitability.
• The price asks the bank to earn a return on equity of about 8.7% against the roughly 7% it has recently delivered, a gap the Stellar Bancorp merger and asset repricing are meant to close.
• The risk to watch is credit: the first quarter brought a record $41 million of net charge-offs tied to two specific loans, against a longer record of low nonperforming assets, so loan quality is the swing variable into the Stellar integration.

Bull Case

The bull case for a bank is almost always about the margin, and Prosperity's margin is moving in the right direction. Net interest margin rose 21 basis points to 3.51% in the first quarter of 2026, up from 3.30% the quarter before, as assets repriced higher and two acquired banks joined the base. For a bank, that spread between what it earns on loans and securities and what it pays for deposits is the engine, and a widening spread on a growing balance sheet is how a regional lender compounds. Net interest income climbed to $321.2 million from $265.4 million a year earlier, and management has guided the margin toward roughly 3.70% by the end of 2026.

The growth underneath the margin is Texas, and it is real. Loans excluding the warehouse purchase program grew 16.4% in the quarter, and the company is layering on the Stellar Bancorp acquisition, which won all required regulatory approvals in April 2026 and is set to close around July 1, adding 52 banking offices across greater Houston and Beaumont. Prosperity has built its franchise by acquiring smaller Texas banks and folding them into a low-cost deposit operation, and Stellar extends that playbook into the state's largest metro market.

Capital and funding are the foundation that lets the bank do all of this from strength. Common equity tier 1 capital stood at 15.44% in the first quarter, far above well-capitalized thresholds, and nonperforming assets have historically run low, around 0.33% of average interest-earning assets in the quarter. The dividend, declared at $0.60 a share for the second quarter and yielding about 3.5%, is paid out of earnings the capital base comfortably supports. Stripping the merger-related expenses, first-quarter earnings were $1.50 a share rather than the reported $1.16, a cleaner picture of the underlying run rate. The bull case is a well-capitalized Texas bank with an expanding margin, double-digit loan growth, and a transformational in-market acquisition, all funded by a deposit franchise and a fortress capital ratio.

Bear Case

The fragility in a bank rarely shows up on the income statement until it is too late; it shows up in the loan book, and Prosperity's loan book just delivered a warning. The first quarter brought a record $41 million in net charge-offs, the largest in the company's history, which management attributed to two specific, unique credits. One quarter does not make a trend, and the bank carries a substantial allowance for credit losses, about 1.59% of loans "Ratio of allowance to end of period loans 1.59 %". But a regional bank growing loans at 16% into a cooling Texas labor market, and now absorbing Stellar's book on top of its own, is exactly the profile where credit surprises tend to cluster. The charge-off spike is the kind of structural signal a bull case has to explain away rather than dismiss.

The funding side is tightening at the same time. Management has acknowledged increased competition from out-of-state banks offering lower loan rates and higher deposit rates, pressure on both ends of the margin the bull case depends on. The bank has said it will hold its line on margin and core deposits even if it means losing deals, which is disciplined but also an admission that the competitive environment is forcing a choice between growth and spread. A Texas franchise built on cheap, sticky deposits is most valuable when no one is bidding for those deposits; that condition is eroding.

The valuation frames the whole question as a return-on-equity bet. The price assumes the bank sustains a return on equity of about 8.7%, while it has recently been earning closer to 7%. Closing that gap is the entire bull thesis, and it rests on the margin expansion and the Stellar synergies arriving on schedule. If credit costs stay elevated or competition compresses the margin, the return stays nearer 7%, and the price-to-book the stock supports drifts lower with it, the bank already trades in the lower half of its peer group's price-to-book, which is the market's way of saying it is not yet convinced. The capital base is genuinely strong, so this is not a solvency story; it is a profitability story, and the price is paying for a return the bank has not yet proven it can hold.

Valuation

A bank is worth the return it earns on its capital, so Prosperity's price is read off price-to-book rather than an operating multiple. At today's quote, roughly 0.9 times book, the market assumes the bank sustains a return on equity of about 8.7%. For reference, it has recently been earning closer to 7%. The gap between those two numbers is the bet: the price is paying for a profitability improvement the bank has guided toward but not yet delivered, and the margin expansion plus the Stellar acquisition are the means by which it is supposed to arrive.

The methods read the stock as value-supported rather than stretched. The asset-value, earnings-power, and peer-multiple lenses all land at or near the price, and even the growth-oriented dividend models are in range. That is the signature of a name priced on what it is worth today rather than on a growth premium, which fits a regional bank trading below one times book. The relative lens, anchored on a sector P/E near 10x, sits close to the quote, and the bank screens in the lower half of its peer group on price-to-book, consistent with a market that wants to see the return materialize before paying up.

The right solvency frame for a bank is capital and credit, not corporate leverage. Deposits are funding, not debt, and the cash-flow and coverage lenses that apply to an industrial company do not apply here. What matters is the capital cushion and the loan quality behind it. Common equity tier 1 at 15.44% is well above regulatory minimums and gives the bank ample room to absorb the Stellar acquisition and a credit cycle. The dividend, near a 3.5% yield, is well covered by earnings. The one figure that complicates the picture is the record quarterly charge-off, which is the variable that decides whether the assumed 8.7% return is reachable or whether the bank settles back toward the 7% it earns today. The decisive question is not the price-to-book; it is the return on equity the bank can actually sustain through the integration and the cycle.

Catalysts

The first quarter of 2026, reported in late April, was a margin-and-merger story. Net interest margin expanded 21 basis points to 3.51%, net interest income rose to $321.2 million from $265.4 million a year earlier, and reported earnings were $1.16 a share; excluding $42.5 million of merger-related expenses, earnings were $1.50 a share on net income of $149.9 million. Loans excluding the warehouse purchase program grew 16.4%. The one blemish was a record $41 million in net charge-offs, which management tied to two specific credits.

The defining near-term event is the Stellar Bancorp merger. Prosperity and Stellar secured all required regulatory approvals on April 22, 2026, with the deal slated to close around July 1 pending Stellar shareholder approval, adding 52 banking offices across greater Houston and Beaumont. Management has framed the combined bank's margin as exiting 2026 near 3.70%, with Stellar a meaningful contributor to that trajectory.

Management's commentary set the tone for the year. The CFO guided the margin to hold flat to slightly higher in the second quarter, while the CEO acknowledged a cooling Texas labor market and stiffer competition from out-of-state banks on both loan rates and deposit pricing. Analyst sentiment is constructive, with a buy-leaning consensus and a mean target modestly above the current quote, and the board declared a second-quarter dividend of $0.60 a share. The figures to watch into the Stellar close are the margin trajectory and whether the first-quarter charge-off was a one-off or the start of a credit normalization.

Peer Cohorts (Per Segment, With Filing Citations)

Community Banking (consolidated) (reported)

• ABCB (Ameris Bancorp)
• FY2025 10-K: CRE loan portfolio has increased by 50% or more during the prior 36 months. As of December 31, 2025, our C&D concentration as a percentage of capital totaled 43.0% and our CRE concentration, net of owner-occupied loans, as a percentage of capital totaled 261.9%. Branching The Bank has branch offices in Alabama,…
• FY2025 10-K: CONSOLIDATED FINANCIAL STATEMENTS NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Business Ameris Bancorp and subsidiaries (the "Company" or "Ameris") is a financial holding company headquartered in Atlanta, Georgia, and whose primary business is presently conducted by Ameris Bank, its wholly owned…
• HOMB (HOME BANCSHARES, INC.)
• FY2025 10-K: …institutions and credit unions have offices in our primary market areas. These institutions include many of the largest banks operating in these respective states, including some of the largest banks in the country. Many of our competitors serve the same counties we do. Our competitors often have greater 11 Table of…
• FY2025 10-K: …monitoring of budget to actual results are used in assessment performance and in establishing compensation. Loans, investments and deposits provide the revenues in the banking operation. Interest expense, provision for credit losses and payroll provide the significant expenses in the banking operation. All operations…
• CVBF (CVB FINANCIAL CORP.)
• FY2025 10-K: …offered by other providers to our customers, including mutual funds, a full array of fixed income vehicles and a program to diversify our customers' funds in federally insured time certificates of deposit of other institutions. In addition, we offer a wide range of financial services and trust services through our…
• FY2025 10-K: Company's primary operations are related to traditional banking activities. This includes the acceptance of deposits and the lending and investing of money through the operations of the Bank. The Bank also provides trust and investment-related services to customers through its CitizensTrust Division. The Bank's…
• CATY (Cathay General Bancorp)
• FY2025 10-K: …Bank's deposits are generally obtained from residents within its geographic market area. The Bank utilizes traditional marketing methods to attract new clients and deposits, by offering a wide variety of products and services and utilizing various forms of advertising media. From time to time, the Bank may offer…
• FY2025 10-K: …policies. The measure of segment assets is reported on the balance sheet as total assets. The Company's operations primarily consist of commercial banking services, servicing primarily the individuals, professionals, and small to medium-sized businesses in the local markets in which its branches are located. Its…
• TCBK (TriCo Bancshares)
• FY2025 10-K: . As a bank holding company, TriCo is subject to the supervision of the Board of Governors of the Federal Reserve System (the "FRB") under the BHC Act. The Bank is subject to the supervision of the California Department of Financial Protection & Innovation (the "DFPI") and the Federal Deposit Insurance Corporation…
• FY2025 10-K: …and approximately 4,500 of those hours were for the benefit of community development efforts to support programs and services to low- or moderate-income communities. We strive to have a workforce that reflects the communities we serve and continue to promote diversity in leadership roles. We are dedicated to…
• MCHB (MECHANICS BANCORP)
• FY2025 10-K: ASC Accounting Standards Codification HUD Department of Housing and Urban Development ASU Accounting Standards Update IRLC Interest rate lock commitment AUM Assets under management LGD Loss given default BHCA Bank Holding Company Act LHFI Loans held for investment BOLI Bank owned life insurance LHFS Loans held for…
• FY2025 10-K: …financial markets. If capital is not available on favorable terms when we need it, then we may have to curtail our growth or certain operations until market conditions become more favorable. Any diminished ability to raise additional capital, if needed, could restrict our ability to grow, require us to take actions…
• WSFS (WSFS FINANCIAL CORPORATION)
• FY2025 10-K: …have been in operation for more than 193 years. In addition to our focus on stellar client experience, we have continued to fuel growth and remain a leader in our community. We are a relationship-focused, locally-managed, community banking institution. Our mission is simple: "We Stand for Service ® ." As of December…
• FY2025 10-K: …goal of 36,000 hours of service by providing over 38,000 hours of service to our Communities; • In October, we held our third annual "We Stand for Service Day", during which approximately 1,600 of our Associates provided more than 5,500 hours of service to more than 130 nonprofit and community organizations across…
• BANR (Banner Corporation)
• FY2025 10-K: …competing for market share. Our efforts, including acquisitions, branch relocations and renovations, and targeted marketing campaigns, are primarily aimed at expanding deposit client relationships and balances. In addition, our electronic and digital banking services, such as debit card and ATM programs, online…
• FY2025 10-K: …Statements of Operations. The fees are based on a contractual percentage of the outstanding principal or a fixed amount per loan and are recorded as income when earned. The amortization of mortgage servicing rights is netted against loan servicing fee income. Bank-Owned Life Insurance: The Bank has purchased, or…

Methodology Note

• Priced-in inversion: the valuation is inverted on the current price to recover the operating-income growth, duration, and steady-state margin the price embeds (ROE for financials, FFO growth for REITs).
• Valuation x-ray: the valuation models, grouped into four families (asset, earnings, relative, growth). Each model is expressed as a price/FV ratio (distance from price), not a point fair-value estimate. The spread across families is the disagreement.
• Economic-unit decomposition (SOTP): each disclosed business unit is assigned its native valuation basis before any multiple is applied. Operating units are valued on enterprise value; funded financial units are valued on their own common equity, because their borrowings fund earning assets rather than levering the parent. A company total is stated only once every material unit carries a supported value and the parent capital bridge reconciles.
• Solvency: net cash/debt, net-debt-to-NOPAT, interest coverage, and share-count CAGR from EDGAR financials (net debt / FFO and fixed-charge coverage for REITs; regulatory-capital framing for financials).
• Peer cohorts: per-segment comparables with deep-linkable SEC filing citations.

Fundamentals sourced from SEC EDGAR filings. Current price from Databento. The priced-in inversion and valuation x-ray are computed by the boothcheck engine; narrative composed by AI from the structured data.