---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-225797"
form_type: "8-K"
ticker: "PB"
cik: "0001068851"
company_name: "PROSPERITY BANCSHARES INC"
filed_at: "2025-10-01T23:59:59+00:00"
generated_at: "2026-05-17T05:02:18.291267+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Prosperity Bancshares to acquire Southwest Bancshares for ~$269M in stock

## Summary
- Prosperity will issue 4,062,520 shares valued at ~$268.9M based on $65.97 closing price.
- Southwest has $2.4B assets, $1.9B loans, and $2.1B deposits as of June 30, 2025.
- Transaction expected to close Q1 2026; subject to Southwest shareholder and regulatory approvals.
- Brent Given to become San Antonio Area Chairman; Tom Moreno senior operations role.
- Adds 11 Texas branches in San Antonio, Austin, and Hill Country; expands Prosperity's Texas footprint.

## SEC filing metadata
- accession: 0001193125-25-225797
- form_type: 8-K
- ticker: PB
- cik: 0001068851
- company_name: PROSPERITY BANCSHARES INC
- filed_at: 2025-10-01T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 7.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1068851/000119312525225797/0001193125-25-225797-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1068851/000119312525225797/pb-20251001.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-225797
- JSON: https://secwatch.observer/filing/0001193125-25-225797.json
- Plain text: https://secwatch.observer/filing/0001193125-25-225797.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.