---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-033776"
form_type: "8-K"
ticker: "PB"
cik: "0001068851"
company_name: "PROSPERITY BANCSHARES INC"
filed_at: "2026-02-02T23:59:59+00:00"
generated_at: "2026-05-16T05:32:30.645734+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Prosperity Bancshares closes acquisition of Southwest Bancshares, issues ~4.1M shares

## Summary
- Closed merger with Southwest Bancshares effective Feb 1, 2026; acquired Texas Partners Bank (11 offices in Central Texas).
- Issued 4,095,397 Prosperity common shares to Southwest shareholders and award holders.
- Brent Given named San Antonio Area Chairman; Tom Moreno to senior management; Gene Dawson Jr. joins Prosperity Bank board.
- Texas Partners banking offices to operate under current name until operational integration expected November 2026.
- Transaction adds presence in San Antonio, Austin, and Hill Country markets.

## SEC filing metadata
- accession: 0001193125-26-033776
- form_type: 8-K
- ticker: PB
- cik: 0001068851
- company_name: PROSPERITY BANCSHARES INC
- filed_at: 2026-02-02T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1068851/000119312526033776/0001193125-26-033776-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1068851/000119312526033776/pb-20260202.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-033776
- JSON: https://secwatch.observer/filing/0001193125-26-033776.json
- Plain text: https://secwatch.observer/filing/0001193125-26-033776.txt

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