secwatch.observer — SEC 8-K summary
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Issuer:     BYLINE BANCORP, INC. (BY)
CIK:        0001702750
Form:       8-K
Filed at:   2026-10-08T21:15:13+00:00
Accession:  0001193125-26-418064
Event type: leadership
Sentiment:  neutral
Materiality: 0.30
Item codes: 5.02, 7.01, 9.01
LLM model:  deepseek-v4.1-flash:cloud@v2

Byline Bancorp names McGuire Chief Commercial Banking Officer, Hawthorne Chief Credit Officer; two EVPs retire
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- Sean H. McGuire (58) named EVP and Chief Commercial Banking Officer, a newly created role effective Jan 1, 2027; he had led as SVP Commercial Banking Group Head since 2019.
- Scott E. Hawthorne (46) named EVP and Chief Credit Officer effective Jan 1, 2027, succeeding Mark Fucinato; he has been Deputy Chief Credit Officer since Aug 2026.
- Darrin Bacon named EVP and Head of Commercial Banking, succeeding Brogan Ptacin; Bacon joined Byline via the 2018 First Bank & Trust acquisition and reports to McGuire.
- Ptacin (Head of Commercial Banking since 2019) and Fucinato (Chief Credit Officer since 2020) retire Dec 31, 2026 after a combined 25 years; both stay part-time in advisory roles.
- McGuire and Bacon report to Byline Bank President and CEO Alberto Paracchini; Byline Bancorp Executive Chairman and CEO is Roberto R. Herencia.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1702750/000119312526418064/0001193125-26-418064-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1702750/000119312526418064/by-20261008.htm
  HTML page:      https://secwatch.observer/filing/0001193125-26-418064

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer