PROSPERITY BANCSHARES INC 8-K

What Happened

• Prosperity Bancshares, Inc. announced in an 8-K filed February 2, 2026 that it has closed its acquisition of Southwest Bancshares, Inc. under the Agreement and Plan of Merger dated September 30, 2025. Southwest merged into Prosperity, with Prosperity continuing as the surviving corporation.
• Following the holding company merger, Texas Partners Bank (a wholly‑owned subsidiary of Southwest) merged into Prosperity Bank (a wholly‑owned subsidiary of Prosperity), with Prosperity Bank continuing as the surviving bank. A press release describing the closing was attached to the filing.

Key Details

• Closing announced and 8-K filed: February 2, 2026.
• Merger agreement date: September 30, 2025.
• Corporate-level merger: Southwest Bancshares, Inc. into Prosperity Bancshares, Inc.
• Bank-level merger: Texas Partners Bank into Prosperity Bank; Prosperity Bank is the surviving bank.
• Company included a press release as Exhibit 99.1 to the 8-K.

Why It Matters

• The filing confirms the transaction has closed and the two banks and holding companies are now consolidated under Prosperity. For investors, this is a material corporate event because it completes the planned acquisition and structural consolidation.
• The 8-K does not include merger financial statements or pro forma results; investors should look for upcoming SEC filings and company disclosures for details on the transaction's financial impact (assets, deposits, integration costs, or synergies).