---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-25-096756"
form_type: "8-K"
ticker: "PB"
cik: "0001068851"
company_name: "PROSPERITY BANCSHARES INC"
filed_at: "2025-07-18T23:59:59+00:00"
generated_at: "2026-05-18T05:32:38.729759+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 to acquire American Bank Holding for ~$321.5M in stock

## Summary
- Consideration: 4,439,981 shares of PB stock valued at ~$321.5M ($72.40 close on 7/16/25).
- American Bank has $2.5B assets, $1.8B loans, $2.3B deposits as of 3/31/25.
- Transaction expected to close Q4 2025 or Q1 2026, subject to regulatory and shareholder approvals.
- Stephen Raffaele to become South Texas/San Antonio Area Chairman; Patt Hawn Wallace to join PB board.

## SEC filing metadata
- accession: 0000950170-25-096756
- form_type: 8-K
- ticker: PB
- cik: 0001068851
- company_name: PROSPERITY BANCSHARES INC
- filed_at: 2025-07-18T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 7.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1068851/000095017025096756/0000950170-25-096756-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1068851/000095017025096756/pb-20250718.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-25-096756
- JSON: https://secwatch.observer/filing/0000950170-25-096756.json
- Plain text: https://secwatch.observer/filing/0000950170-25-096756.txt

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