Byline Bancorp, Inc. (BY) to Buy Illinois State Bancorp for ~$87.9M
Byline Bancorp (BY) agreed to acquire Illinois State Bancorp in a cash-and-stock deal valued at ~$87.9M. The deal includes 1.4M shares, $28.9M cash, and $5.1M for option settlement, expected to close in Q1 2027, pending approvals.
How this was made

The 30-second read
Why it matters
The acquisition adds roughly $87.9M of assets and deposits, potentially enhancing earnings per share and market positioning.
Market read
A new M&A deal in the regional banking sector that could modestly lift Byline's stock and affect peer valuations.
What to watch
Regulatory approval risk and integration challenges may delay benefits
Background
Byline Bancorp is pursuing in‑market consolidation to increase scale and deposits in the Chicago area.
Ticker impact
Byline Bancorp announced a cash-and-stock acquisition of Illinois State Bancorp valued at $87.9M.
potential upside as market prices in the acquisition's growth potential
Acquisition expands Byline's footprint in Chicago; investors typically reward scale in regional banking.
Market effects
regional banking consolidation may pressure peer valuations
U.S. regional banks could see modest re‑rating
limited to U.S. banking sector
Counterpoint
Deal could stretch Byline's balance sheet and dilute existing shareholders
Key entities
- companyByline Bancorp, Inc.
U.S. regional bank acquiring Illinois State Bancorp
- companyIllinois State Bancorp
Target of the acquisition


