Recent 8-K filings for PB

• April 22, 2026, 7:59 PM ET M&A materiality 0.70 positive item 8.01item 9.01

  Prosperity gets all regulatory approvals for Stellar acquisition; closing expected July 1, 2026

  Received all regulatory approvals: FRB Dallas waiver, FDIC, Texas Dept. of Banking.

• February 2, 2026, 6:59 PM ET M&A materiality 0.75 positive item 8.01item 9.01

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

  Closed merger with Southwest Bancshares effective Feb 1, 2026; acquired Texas Partners Bank (11 offices in Central Texas).

• January 29, 2026, 6:59 PM ET M&A materiality 0.85 neutral item 1.01item 9.01 ◈ Material Agreements

  Prosperity Bancshares to acquire Stellar Bancorp in stock+cash deal valued at $11.36 + 0.3803 shares per Stellar share

  Each Stellar share exchanged for 0.3803 PB shares plus $11.36 cash; Stellar options and awards cancelled for cash.

• January 28, 2026, 6:59 PM ET M&A materiality 0.75 positive item 7.01item 9.01

  Prosperity Bancshares to acquire Stellar Bancorp for ~$2.002B in stock/cash

  Prosperity issues 0.3803 shares plus $11.36 cash per Stellar share; total consideration ~$2.002B.

• January 2, 2026, 6:59 PM ET M&A materiality 0.60 neutral item 8.01item 9.01

  Prosperity Bancshares closes all-stock acquisition of American Bank; issues 4.44M shares

  Merger of American Bank Holding Corp and American Bank into Prosperity effective January 1, 2026.

• October 1, 2025, 7:59 PM ET M&A materiality 0.80 positive item 7.01item 8.01item 9.01

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

  Prosperity will issue 4,062,520 shares valued at ~$268.9M based on $65.97 closing price.

• July 18, 2025, 7:59 PM ET M&A materiality 0.75 positive item 7.01item 8.01item 9.01

  Prosperity Bancshares to acquire American Bank Holding for ~$321.5M in stock

  Consideration: 4,439,981 shares of PB stock valued at ~$321.5M ($72.40 close on 7/16/25).

Earnings & guidance

Materiality & sentiment trend

Max materiality 0.85 · Median 0.40 · Most common event earnings

5 positive 0 negative 16 neutral

source · PB on sec.gov