Byline Bancorp, Inc. · NYSE:BY

Byline Bancorp — Merger or Acquisition (October 2026)

5 slides from Byline Bancorp's merger presentation, Oct 6, 2026

1. Slide 1: Byline Bancorp, Inc. to Acquire Illinois State Bancorp, Inc.

   Investor Presentation October 6, 2026 Byline Bancorp, Inc. to Acquire Illinois State Bancorp, Inc. Exhibit 99.2

2. Slide 2: Important Notices

   Important Notices BYLINE BANCORP, INC. | ILLINOIS STATE BANCORP, INC. FORWARD-LOOKING STATEMENTS The information included herein may contain “forward-looking statements” within the meaning of the U.S. federal securities laws. Any statements about Byline Bancorp, Inc. (“Byline”) expectations, beliefs

3. Slide 3: Overview of Illinois State Bancorp, Inc.

   Overview of Illinois State Bancorp, Inc. BYLINE BANCORP, INC. | ILLINOIS STATE BANCORP, INC. COMPANY OVERVIEW A privately held, Chicago-based bank holding company Operates through two community banking subsidiaries, each with 50+ years of history: First Nations Bank (Chicago, IL) The Bank of Bourbon

4. Slide 4: Overview of Transaction and Consideration Terms

   Overview of Transaction and Consideration Terms Financially attractive transaction with compelling pro forma financial impact BYLINE BANCORP, INC. | ILLINOIS STATE BANCORP, INC. Consideration Byline Bancorp, Inc. (NYSE: BY) will acquire 100% of Illinois State Bancorp, Inc. outstanding common stock B

5. Slide 5: Key Transaction Assumptions

   Key Transaction Assumptions Detailed financial, legal, regulatory and operational due diligence performed BYLINE BANCORP, INC. | ILLINOIS STATE BANCORP, INC. Balance Sheet Marks Estimated gross credit mark of approximately 3.7% Loan interest rate mark of 2.0% Other net marks of $0.9 million Synergie

Byline Bancorp — Merger or Acquisition (October 2026) on 6ix