BY · Byline Bancorp, Inc.

Byline Bancorp delivered a robust first quarter 2026, with net income rising 8.9% sequentially and 33.1% year-over-year, driven by solid core banking fundamentals: net interest margin held steady at 4.33% despite pressure on loan yields, supported by a 6-basis-point decline in the average cost of deposits to 1.91%. Non-interest expense declined meaningfully—$3.2 million (5.3%)—primarily due to lower incentive compensation and professional fees, improving the efficiency ratio by 54 bps to 49.78%, the lowest level in over two years. The provision for credit losses dropped sharply to $5.5 million from $9.7 million in Q4 2025, reflecting improved asset quality (non-performing loans down $4.0 million, net charge-offs down $0.8 million) and a more favorable economic forecast. Management highlighted resilience amid market volatility and emphasized execution of its commercial banking strategy, citing active capital return—including a 20% dividend increase to $0.12 per share and $10 million in share repurchases—as evidence of confidence in earnings sustainability and capital strength. Tangible book value per share grew 1.5% to $23.79, and CET1 rose 22 bps to 12.55%, providing ample capacity for continued organic growth and shareholder returns. While non-interest income declined 20.4% quarter-over-quarter—mainly due to fair-value losses on equity securities—the stability in core revenue drivers and disciplined expense management underscore operational consistency. No forward guidance was provided in Exhibit 99.1 or the 8-K, consistent with Byline’s historical practice of avoiding explicit EPS or margin targets.