Byline Bancorp, Inc. and ILLINOIS STATE Bancorp, Inc. Announce Definitive Merger Agreement
BYLINE BANCORP, INC. (BY) filed an SEC Form 8-K — Regulation FD Disclosure. Exhibit 99.1 Byline Bancorp, Inc. and ILLINOIS STATE Bancorp, Inc. Announce Definitive Merger Agreement Chicago, IL, October 6, 2026 – Byline Bancorp, Inc. (“Byline”) (NYSE: BY), and Illinois State Bancorp, Inc. ("Illinois State Bancorp"), today jointly announced that they have e
How this was made
The 30-second read
Why it matters
Adds $617 million in assets and expands branch footprint, likely improving earnings per share after integration.
Market read
First‑report M&A deal for a mid‑cap bank, offering a clear trading catalyst.
What to watch
Regulatory approval timeline and potential competition for deposits in the region.
Background
The filing is a Regulation FD 8‑K disclosure announcing the merger terms and financial details.
Ticker impact
Byline Bancorp disclosed a definitive merger agreement to acquire Illinois State Bancorp in a $87.9 million cash‑and‑stock deal.
modest upside as investors price in synergies and a larger deposit base
First‑report merger of a mid‑cap bank; cash component and share issuance suggest limited dilution and accretive growth.
Market effects
Consolidation trend in regional banking may pressure peers' valuations.
Strengthens Byline's presence in the Chicago market, potentially attracting local investors.
Limited; primarily a US regional banking story.
Counterpoint
Deal could dilute existing shareholders and integration risks may outweigh synergies.
Key entities
- companyByline Bancorp, Inc.
US‑listed regional bank (NYSE: BY) acquiring Illinois State Bancorp.
