Form4insider filings, from the source

Company · CIK 0001702750 · SIC 6022 — State Commercial Banks · NYSE

BYLINE BANCORP, INC. · BY

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $15k · 2sales $24.3M · 4net −$24.3M
$10k$10k$1M$1M$100M$100MbuyssalesMar 28Apr 27May 28Jun 28Jul 29Aug 28Sep 28

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 19, 2026 PForm 4 →Aug 20, 1:15 pm EDTWilliam G KistnerDirector100$38.30$3,83014,289+0.70%
Aug 19, 2026 PForm 4 →Aug 20, 1:12 pm EDTMary Jo S. HersethDirector300$38.40$11,51919,100+1.60%
Aug 13, 2026 SForm 4 →Aug 14, 5:55 pm EDTRoberto R HerenciaCHIEF EXECUTIVE OFFICER, Director19,750$39.21$774,307411,643−4.58%
Aug 12, 2026 SForm 4 →Aug 12, 4:30 pm EDTDana RoseCHIEF HUMAN RESOURCES OFFICER2,421$39.00$94,41911,605−17.3%
Aug 7, 2026 SForm 4 →Aug 11, 5:57 pm EDTMBG INVESTORS I, L.P.10% Owner300,000$39.10$11,730,00011,535,145−2.53%
Aug 7, 2026 SForm 4 →Aug 11, 4:05 pm EDTPerochena Antonio Del ValleDirector, 10% Owner300,000$39.10$11,730,00011,535,145−2.53%
Aug 3, 2026 ADForm 4 →Aug 4, 1:41 pm EDTBrogan PtacinHEAD OF COMMERCIAL BANKING18,900$26.16$494,33625,859—
Jun 8, 2026 AForm 4 →Jun 10, 4:57 pm EDTCarlos Ruiz SacristanDirector1,533——13,533—
Jun 8, 2026 AForm 4 →Jun 10, 4:50 pm EDTVelez Margarita HuguesDirector1,533——8,722—
Jun 2, 2026 FForm 4 →Jun 3, 2:45 pm EDTVelez Margarita HuguesDirector530$33.41$17,7077,189—

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 3, 2026 MForm 4 →Aug 4, 1:41 pm EDTBrogan PtacinHEAD OF COMMERCIAL BANKING9,450——0—