8-K: Stellar Bancorp Completes Merger with Prosperity Bancshares

Stellar Bancorp, Inc. has merged with Prosperity Bancshares, Inc., with Prosperity as the surviving entity, effective July 1, 2026.

Summary

• Stellar Bancorp, Inc. (Stellar) has completed its merger with Prosperity Bancshares, Inc. (Prosperity), with Prosperity continuing as the surviving corporation.
• The merger was effective on July 1, 2026, following an Agreement and Plan of Merger dated January 27, 2026.
• Stellar Bank, a subsidiary of Stellar, also merged with Prosperity Bank, a subsidiary of Prosperity, with Prosperity Bank surviving.
• Each share of Stellar Common Stock was converted into 0.3803 shares of Prosperity Common Stock and $11.36 in cash, plus cash for fractional shares.
• Stellar stock options were cancelled, with holders receiving cash for options with an exercise price below the Per Share Merger Consideration Value.
• Stellar restricted stock awards fully vested and were converted into the Per Share Merger Consideration.
• Stellar performance unit awards fully vested and were converted into a cash payment based on the Per Share Merger Consideration Value, with performance deemed achieved at 100% or 200% of target.
• Stellar's common stock will be delisted from the New York Stock Exchange (NYSE) as of July 1, 2026.
• Prosperity intends to file a Form 15 to deregister Stellar's common stock and suspend reporting obligations.
• As part of a balance sheet repositioning, Stellar sold approximately $466.4 million of securities from its investment portfolio before the merger closing.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this filing as neutral, as it primarily reports the factual completion of a merger and associated corporate actions, rather than new financial performance data or strategic outlook.

Positives

• Completion of the merger provides a clear outcome for Stellar shareholders, who will receive a combination of Prosperity stock and cash.
• Performance unit awards were treated favorably, with performance deemed achieved at 100% or 200% of target, maximizing value for award holders.
• The balance sheet repositioning strategy allowed Stellar to sell $466.4 million in securities prior to the merger, potentially optimizing the portfolio's value at the time of transaction.

Negatives

• Stellar's common stock will cease trading on the NYSE, marking the end of its independent listing.
• Holders of Stellar stock options with exercise prices at or above the Per Share Merger Consideration Value received no compensation for their options.

Risks

• Integration risks associated with merging two banking entities, including potential operational challenges and cultural alignment issues.
• Potential for unforeseen liabilities or issues arising from the acquired entity (Stellar) that may impact the surviving entity (Prosperity).
• Regulatory scrutiny or changes that could affect the combined entity's operations or profitability.

Future Outlook

The filing does not contain specific forward-looking statements or guidance from management regarding future performance. The primary focus is on the completion of the merger and its immediate implications.

Management Comments

• Pursuant to the Merger Agreement, Stellar's directors and executive officers ceased serving as directors and executive officers of Stellar as of the Effective Time.
• Robert R. Franklin, Jr. and Joseph B. Swinbank, former directors of Stellar, were appointed to the board of directors of Prosperity.

Industry Context

StockSavvy.ai notes that this merger represents a significant consolidation within the regional banking sector, a trend driven by the pursuit of scale, efficiency, and enhanced market presence. The combination of Stellar Bancorp and Prosperity Bancshares aims to create a larger, more competitive financial institution.

Management Changes

Corporate Governance

Legal Proceedings

• NA

Related Party Transactions

• NA

Stakeholder Impact

• Shareholders of Stellar: Received Prosperity Common Stock and cash, ending their direct ownership in Stellar.
• Employees of Stellar: Potential for integration into Prosperity's workforce, with possible changes in roles, benefits, and employment terms.
• Creditors of Stellar: Their claims and obligations are now assumed by the surviving entity, Prosperity Bancshares, Inc.
• Customers of Stellar: Will transition to banking services under Prosperity Bank, potentially experiencing changes in product offerings, service channels, and branch locations.

Next Steps

• Prosperity Bancshares, Inc. will continue as the surviving corporation.
• Prosperity Bank will continue as the surviving bank.
• Prosperity intends to file a Form 15 with the SEC to deregister Stellar Common Stock and suspend reporting obligations.
• Former Stellar directors Robert R. Franklin, Jr. and Joseph B. Swinbank have been appointed to Prosperity's board of directors.

Key Dates

Keywords

Merger, Acquisition, Prosperity Bancshares, Stellar Bancorp, Banking, Financial Services, SEC Filing, Form 8-K, Stock Options, Restricted Stock, Delisting, Corporate Governance