425: Prosperity Bancshares to Acquire Stellar Bancorp in $2 Billion Deal

Prosperity Bancshares, Inc. announced a definitive merger agreement to acquire Stellar Bancorp, Inc. for approximately $2.002 billion, creating the second largest bank by deposits headquartered in Texas.

Summary

• Prosperity Bancshares, Inc. (NYSE: PB) has entered into a definitive merger agreement to acquire Stellar Bancorp, Inc. (NYSE: STEL).
• Stellar will merge with and into Prosperity, and Stellar Bank will merge with and into Prosperity Bank.
• Under the terms, Prosperity will issue 0.3803 shares of its common stock and $11.36 in cash for each outstanding share of Stellar common stock.
• Based on Prosperity's closing price of $72.90 on January 27, 2026, the total consideration is valued at approximately $2.002 billion.
• As of December 31, 2025, Stellar reported total assets of $10.807 billion, total loans of $7.301 billion, and total deposits of $9.021 billion.
• The combined company will become the second largest bank by deposits headquartered in Texas, with over 330 banking centers.
• Pro forma at estimated close (June 30, 2026), the combined entity will have $54 billion in assets, $33 billion in loans, and $42 billion in deposits.
• The merger has been unanimously approved by the Boards of Directors of both companies and is expected to close during the second quarter of 2026.

Sentiment

Score: 8

Explanation: The merger announcement is highly positive for both companies, creating a larger, more competitive entity with significant strategic advantages and expected EPS accretion. While there is tangible book value dilution, the earnback period is reasonable, and the strategic benefits outweigh the initial dilution. Management's comments are optimistic, and the financial projections are strong.

Positives

• Creates the second largest bank by deposits headquartered in Texas, significantly enhancing market presence.
• Bolsters Prosperity's position as a leading Houston bank and establishes it as the #1 bank in Beaumont by deposit share.
• The combined entity will have increased scale, better positioning it to invest in future opportunities and serve customers.
• Stellar's management team, including Robert R. Franklin, Jr. and Ramon Vitulli, will join Prosperity, bringing extensive banking experience and local knowledge.
• The merger is expected to be 9.2% accretive to Prosperity's 2027 estimated Earnings Per Share (EPS).
• The pro forma company is projected to achieve a 1.58% Return on Average Assets (ROAA) and 17.1% Return on Average Tangible Common Equity (ROATCE) by 2027.
• The pro forma efficiency ratio is estimated at ~44% in 2027, indicating operational efficiency.
• Stellar has a strong deposit franchise with ~38% noninterest-bearing deposits, contributing to a pro forma noninterest-bearing deposit ratio of 34%, which is above the KBW Regional Bank Index median of 25%.
• The pro forma cost of deposits is 1.46%, lower than the KBW Regional Bank Index median of 1.98%.
• The Houston MSA, a key market for the combined entity, is projected to grow its population by 7.3% from 2026-2031, significantly outpacing the U.S. projected growth of 2.6%.

Negatives

• The transaction is expected to result in a (7.8%) tangible book value (TBV) dilution.
• The projected TBV earnback period is approximately 4.5 years.
• Estimated one-time pre-tax transaction expenses are approximately $100.0 million.

Risks

• Cost savings and synergies from the proposed transaction may not be fully realized or may take longer than anticipated.
• Disruption to Prosperity's and Stellar's businesses as a result of the announcements and pendency of the proposed transaction.
• The integration of Stellar's businesses and operations into Prosperity may be materially delayed, more costly, or difficult than expected, or Prosperity may be unable to successfully integrate Stellar's business.
• Failure to obtain the necessary approval by the shareholders of Stellar.
• Inability to obtain required governmental approvals of the proposed transaction on the expected timeline, or at all, or such approvals may impose conditions that adversely affect Prosperity or the expected benefits.
• Reputational risk and the reaction of each company's customers, suppliers, employees, or other business partners to the proposed transaction.
• Failure of the closing conditions in the Merger Agreement to be satisfied, or any unexpected delay in closing or occurrence of events that could lead to termination of the Merger Agreement.
• Dilution caused by the issuances of additional shares of Prosperity's common stock in the proposed transaction.
• The possibility that the proposed transaction may be more expensive to complete than anticipated.
• The outcome of any legal or regulatory proceedings that may be currently pending or later instituted against Prosperity or Stellar.
• Diversion of management's attention from ongoing business operations.
• General competitive, economic, political, and market conditions and other factors that may affect future results of Prosperity and Stellar.

Future Outlook

The merger is expected to close in Q2 2026, creating a larger, more competitive financial institution with enhanced capabilities and financial strength. Management anticipates significant cost savings and positive EPS accretion by 2027, despite initial tangible book value dilution. The combined entity aims to capitalize on the growing Texas economy, particularly in the Houston and Beaumont MSAs.

Management Comments

• "The combination of our companies will create the second largest bank by deposits headquartered in Texas with over 330 banking centers. Together, our increased scale better positions us to invest in future opportunities and serve our customers." David Zalman, Senior Chairman and Chief Executive Officer of Prosperity.
• "This is a rare opportunity to significantly enhance our presence in the Houston area, a market with a diverse economy that is continually attracting investment and has a growing population." David Zalman, Senior Chairman and Chief Executive Officer of Prosperity.
• "Our banks have a complementary footprint, and we are familiar with and remain committed to the communities that Stellar Bank serves, including with both financial products and community support." David Zalman, Senior Chairman and Chief Executive Officer of Prosperity.
• "By joining forces, we are creating one of the strongest Texas banking franchises, supported by an exceptional deposit base and a shared commitment to relationship-driven community banking." Robert R. Franklin, Jr., Chief Executive Officer of Stellar and Executive Chairman of Stellar Bank.
• "This combination enhances our ability to serve customers with greater scale, expanded capabilities, and the financial strength needed to meet the evolving needs of a growing Texas economy." Robert R. Franklin, Jr., Chief Executive Officer of Stellar and Executive Chairman of Stellar Bank.
• "I am incredibly proud of what our team has built, and I am excited about the opportunities this merger creates for our customers, employees, and communities. Together with Prosperity, we look forward to building an even more competitive and resilient financial institution for the future." Robert R. Franklin, Jr., Chief Executive Officer of Stellar and Executive Chairman of Stellar Bank.

Industry Context

This merger significantly consolidates the Texas banking market, creating the second-largest Texas-headquartered bank by deposits. It strengthens Prosperity's position in the high-growth Houston and Beaumont MSAs, which are experiencing substantial population growth and economic activity, including major petrochemical and medical complexes. The transaction reflects a trend of regional banks seeking scale and market dominance in attractive geographies.

Comparison to Industry Standards

• The pro forma company's noninterest-bearing deposits as a percentage of total deposits (34%) are significantly higher than the KBW NASDAQ Regional Banking Index (KRX) median of 25%.
• The pro forma company's cost of deposits (1.46%) is lower than the KBW NASDAQ Regional Banking Index (KRX) median of 1.98%, indicating a more efficient funding base.
• Stellar Bancorp was ranked 6th in S&P Global's 2024 Top 50 Public Banks Deposit Rankings, highlighting its strong deposit franchise prior to the merger.
• The combined entity will be the #1 bank in Beaumont by deposit share, surpassing competitors like First Financial Bankshares Inc. and Wells Fargo & Co.
• In the Houston MSA, the pro forma entity will hold the 4th rank by deposit share (3.2%), behind major national players like JPMorgan Chase & Co. (51.3%), Wells Fargo & Co. (8.9%), and Bank of America Corp. (7.0%), but ahead of other regional players like PNC Financial Services Group Inc. and Cullen/Frost Bankers Inc.

Management Changes

Corporate Governance

Legal Proceedings

• The filing mentions "the outcome of any legal or regulatory proceedings that may be currently pending or later instituted against Prosperity before or after the proposed transaction, or against Stellar" as a risk factor related to the merger.

Stakeholder Impact

• Shareholders (Stellar): Will receive 0.3803 shares of Prosperity common stock and $11.36 in cash for each share, representing a total consideration of approximately $2.002 billion.
• Shareholders (Prosperity): Expected to experience 9.2% EPS accretion by 2027 but also a (7.8%) tangible book value dilution with a ~4.5-year earnback period.
• Employees (Stellar): Key management will retain leadership roles, and employment agreements have been signed with key Stellar Bank personnel, suggesting some continuity, but broader employee impact is not detailed.
• Customers: Expected to benefit from greater scale, expanded capabilities, and enhanced financial strength of the combined institution, with a continued commitment to community banking.
• Communities: The combined bank commits to continuing financial products and community support in the areas Stellar Bank serves.

Next Steps

• Obtain required regulatory approvals.
• Obtain approval by Stellar's shareholders.
• Satisfy other customary closing conditions.
• Prosperity to file a Registration Statement on Form S-4 with the SEC.
• Prosperity to file a prospectus and a proxy statement of Stellar (Proxy Statement/Prospectus) with the SEC.
• Stellar's shareholders to receive the Proxy Statement/Prospectus.
• Integration of Stellar's businesses and operations into Prosperity.

Key Dates

Recommendation

The acquisition of Stellar Bancorp by Prosperity Bancshares is a strategically sound move that significantly enhances Prosperity's market presence in the high-growth Texas region, particularly Houston and Beaumont. The transaction is expected to be highly accretive to Prosperity's EPS by 9.2% in 2027, indicating strong future profitability. While there is an initial tangible book value dilution of 7.8%, the projected earnback period of approximately 4.5 years is acceptable for a strategic acquisition of this scale. The combined entity will boast a superior deposit franchise with a higher percentage of noninterest-bearing deposits and a lower cost of deposits compared to industry peers, suggesting a robust funding base. The integration of experienced Stellar management and the targeted cost savings further bolster the long-term value creation potential. This merger positions Prosperity for sustained growth and increased market leadership in a dynamic economic environment.

Keywords

Merger, Acquisition, Banking, Financial Services, Texas, Houston, Beaumont, Prosperity Bancshares, Stellar Bancorp, Bank Merger, Regional Bank, SEC Filing, Form 425, EPS Accretion, TBV Dilution, Deposit Franchise