Key facts
- · In / out: Out · Person: Brogan M. Ptacin · Role: Executive Vice President · Effective: 2027-01-01 · 8-K, 2026-10-08
- · In / out: In · Person: Sean H. McGuire · Role: Chief Commercial Banking Officer · Effective: 2027-01-01 · 8-K, 2026-10-08
- · In / out: Out · Person: Mark Fucinato · Role: Chief Credit Officer · Effective: 2026-12-31 · 8-K, 2026-10-08
- · In / out: In · Person: Scott Hawthorne · Role: Chief Credit Officer · Effective: 2027-01-01 · 8-K, 2026-10-08
Byline Bancorp, Inc. reported a change among its directors and officers to the SEC on Form 8-K, Item 5.02, on 2026-10-08. It names 4 people, with 2 appointments and 2 departures. Every row below is cited to the filing it comes from, and this page adds each new change as Byline Bancorp, Inc. files it.
Timeline
| Filed | In / out | Person | Role | Effective | Source |
|---|---|---|---|---|---|
| 2026-10-08 | Out | Brogan M. Ptacin | Executive Vice President | 2027-01-01 | 8-K, 2026-10-08 |
| 2026-10-08 | In | Sean H. McGuire | Chief Commercial Banking Officer | 2027-01-01 | 8-K, 2026-10-08 |
| 2026-10-08 | Out | Mark Fucinato | Chief Credit Officer | 2026-12-31 | 8-K, 2026-10-08 |
| 2026-10-08 | In | Scott Hawthorne | Chief Credit Officer | 2027-01-01 | 8-K, 2026-10-08 |
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Leadership as last reported
For each role that changed in the filings below, the most recent change reported. A role that did not change in these filings is not listed.
- Chief Credit Officer: Scott Hawthorne, appointed, effective 2027-01-01 (filed 2026-10-08).
- Chief Commercial Banking Officer: Sean H. McGuire, appointed, effective 2027-01-01 (filed 2026-10-08).
- Executive Vice President: Brogan M. Ptacin, departure reported, effective 2027-01-01 (filed 2026-10-08). No successor is named in these filings.
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Departing: Brogan M. Ptacin, Executive Vice President, effective 2027-01-01
On October 08, 2026, Byline Bancorp, Inc. (the "Company") and its wholly-owned subsidiary Byline Bank (the "Bank") announced the following leadership changes, which will become effective January 1, 2027: Retirement of Brogan M. Ptacin, Head of Commercial Banking On October 08, 2026, Brogan Ptacin, Executive Vice President and Head of Commercial Banking, and a named executive officer of the Company, provided notice of his decision to retire from his position effective December 31, 2026.
Appointed: Sean H. McGuire, Chief Commercial Banking Officer, effective 2027-01-01
Appointment of Sean H. McGuire as Chief Commercial Banking Officer On October 08, 2026, the Bank appointed Sean H. McGuire, age 58, to the newly created positon of Chief Commercial Banking Officer, to be effective January 1, 2027.
Departing: Mark Fucinato, Chief Credit Officer, effective 2026-12-31
On October 08, 2026, Mark Fucinato, Executive Vice President and Chief Credit Officer, provided notice of his decision to retire from his position effective December 31, 2026.
Appointed: Scott Hawthorne, Chief Credit Officer, effective 2027-01-01
On October 08, 2026, the Company and the Bank appointed Scott Hawthorne, age 46, to succeed Mr. Fucinato as Chief Credit Officer, to be effective January 1, 2027.
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Where this comes from
A public company must file a current report on Form 8-K with the SEC within four business days when a director leaves or is elected, or when its chief executive, chief financial, chief accounting or chief operating officer, or another named executive, departs or is appointed. That disclosure goes under Item 5.02 of the report.
Every change on this page is taken from one of those filings and quoted in the company's own words, with a link to the filing, so it can be checked at the source. Where a filing names the person, the role and the date a change takes effect, they are shown beside the quote. Where it does not, the quote stands on its own. A filing states what changed; it rarely states why, and neither does this page.