Byline Bancorp, Inc. (BY) Institutional Ownership

Ownership Summary

Recent 13F filings as of September 2025 show that 174 institutional investors hold a position in Byline Bancorp, Inc. (NYSE:BY).

• The collective stake of institutional investors in Byline Bancorp moved to 54.2% in September 2025, a shift up from the 53.3% reported for June 2025.
• Quarterly data indicates a 5.31% shift in institutional share volume, and the annual owner count reflects an increase of 25.18%.
• During the quarter, 103 institutions bought more Byline Bancorp shares, 49 sold shares, and 22 of the 174 total investors held their position steady.
• This class of investors increased its holdings in Byline Bancorp to 24.36Mn shares for the 13F-cycle ending September 2025, up by 1.23Mn shares quarter on quarter, and up 5.18Mn shares year over year.
• The top institutional stake in Byline Bancorp as of September 30, 2025 belongs to BlackRock, Inc., which owns 2.85Mn shares, or 6.33% of the company.
• Among the most significant buyers of Byline Bancorp during September 2025 were BlackRock, Inc. (508.64K), AQR CAPITAL MANAGEMENT LLC (315.69K), Nuveen, LLC (223.29K), STATE STREET CORP (158.36K), JPMORGAN CHASE & CO (140.22K).
• Leading sellers of Byline Bancorp stock in September 2025 included WELLINGTON MANAGEMENT GROUP LLP (487.65K), MILLENNIUM MANAGEMENT LLC (135.12K), JANE STREET GROUP, LLC (130.67K), Ararat Capital Management LP (106.08K), BANC FUNDS CO LLC (68.45K).
• The top 10 institutional holders of Byline Bancorp for the quarter ending September 2025 included BlackRock, Inc. (2.85Mn), DIMENSIONAL FUND ADVISORS LP (2.32Mn), VANGUARD GROUP INC (1.77Mn), WELLINGTON MANAGEMENT GROUP LLP (1.24Mn), STATE STREET CORP (988.05K), FMR LLC (972.07K), Aristotle Capital Boston, LLC (886.32K), AMERICAN CENTURY COMPANIES INC (803.29K), GEODE CAPITAL MANAGEMENT, LLC (750.33K), Boston Partners (732.80K).