Byline Bancorp, Inc. has disclosed a significant stock transaction involving its Head of Commercial Banking, Brogan M. Ptacin. This event is noteworthy as it reveals internal changes within the company that could affect investor sentiment and market dynamics.

Background

Byline Bancorp, Inc. operates in the state commercial banks sector, classified under SIC 6022. The company trades on the NYSE under the ticker symbol BY. As a large accelerated filer, Byline has been active in filing various reports, with the most recent being on November 2, 2026.

What the Filing Says

According to the recent filing, Ptacin sold a total of 16,100 shares of Byline Bancorp's common stock on October 29, 2026. The shares were sold at prices of $38.9037 and $39.0476 per share. Following these transactions, Ptacin retains ownership of 25,859 shares.

Impact

This transaction may affect Byline Bancorp's stakeholders, including investors and analysts monitoring the company's performance. The sale by a key executive could raise questions about insider sentiment and future company direction.

What's Next

The filing does not say what happens next.

Details of the Transaction

In the filing, it is noted that Brogan M. Ptacin executed two separate transactions on October 29, 2026. The first transaction involved the sale of 14,229 shares at a price of $38.9037 per share, resulting in a post-transaction ownership of 12,971 shares. The second transaction involved the sale of 1,871 shares at a price of $39.0476 per share, which left Ptacin with 11,100 shares after the sale. The total shares sold amounted to 16,100.

Ownership Structure

Following these transactions, Ptacin retains a total of 25,859 shares of Byline Bancorp's common stock. Notably, the ownership of these shares is held through the Brogan M. Ptacin Rev Trust, dated March 24, 2004, with Ptacin serving as trustee.

Regulatory Compliance

This filing is categorized as Form 4, which is used to report changes in ownership of securities by insiders. It was filed in accordance with the SEC Act of 1934, demonstrating compliance with regulatory requirements regarding insider transactions.

Additional Context

The filing does not provide insights into the reasons behind Ptacin's decision to sell these shares, nor does it indicate any future plans for stock transactions or changes in his role within Byline Bancorp.