InsiderSource
BY

BYLINE BANCORP, INC.

SEC CIK 1702750
$35.06 +5.0% · 90 days
90-day buys
$3.2K
1 open-market
90-day sells
$0
0 open-market
Net insider flow
+$3.2K
Net buying
Filings shown
88
Most recent
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At a glance

Over the last 90 days, insiders at BY have bought a net $3.2K of stock (1 open-market buy vs 0 sells).

Largest recent trade: Abraham Thomas sold $537.4K of BY, trimming their stake 34%.

Most active filer: Kistner William G, with 20 transactions among the recent filings shown.

Insider transaction history

Form 4 filings for BY, newest first
View on SEC EDGAR ↗
BY
BYLINE BANCORP, INC.
Buy KISTNER WILLIAM G · Director · Open-market purchase · filed May 4, 2026 ΔOwn +0.7%

Kistner William G, BY's Director, spent $3.2K of their own money on 100 shares at $32, growing their stake 1%.

+$3.2K
100 sh @ $32
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BY
BYLINE BANCORP, INC.
Buy HERSETH MARY JO S. · Director · Open-market purchase · filed Mar 16, 2026 ΔOwn +1.6%

Herseth Mary Jo S., BY's Director, spent $9.2K of their own money on 300 shares at $31, growing their stake 2%.

+$9.2K
300 sh @ $31
BY
BYLINE BANCORP, INC.
Sell Barkidjija John · HEAD OF CRE & SPECIALTY FIN · Open-market sale · filed Mar 2, 2026 ΔOwn −19%

Barkidjija John sold $145.8K of BY, trimming their stake 19%.

−$145.8K
4,509 sh @ $32
BY
BYLINE BANCORP, INC.
Tax withholding Mando Nicolas · CHIEF TECHNOLOGY & OPERATIONS · Tax withholding · filed Feb 24, 2026 ΔOwn −5.0%
−$25.6K
772 sh @ $33
BY
BYLINE BANCORP, INC.
Tax withholding Mando Nicolas · CHIEF TECHNOLOGY & OPERATIONS · Tax withholding · filed Feb 24, 2026 ΔOwn −3.9%
−$21.1K
636 sh @ $33
BY
BYLINE BANCORP, INC.
Tax withholding Rose Dana · CHIEF HUMAN RESOURCES OFFICER · Tax withholding · filed Feb 24, 2026 ΔOwn −8.4%
−$37.7K
1,139 sh @ $33
BY
BYLINE BANCORP, INC.
Tax withholding Rose Dana · CHIEF HUMAN RESOURCES OFFICER · Tax withholding · filed Feb 24, 2026 ΔOwn −5.7%
−$28.3K
855 sh @ $33
BY
BYLINE BANCORP, INC.
Tax withholding BIGGAM MEGAN · EVP HEAD OF COMMUNITY BANKING · Tax withholding · filed Feb 24, 2026 ΔOwn −2.3%
−$25.6K
772 sh @ $33
BY
BYLINE BANCORP, INC.
Tax withholding BIGGAM MEGAN · EVP HEAD OF COMMUNITY BANKING · Tax withholding · filed Feb 24, 2026 ΔOwn −1.9%
−$22.5K
678 sh @ $33
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About BY insider activity

This page tracks every recent Form 4 filed for BYLINE BANCORP, INC. with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.

The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.

Frequently asked questions

What are the latest BY insider transactions?

The most recent Form 4 filings for BY are listed at the top of this page, newest first, usually within minutes of SEC acceptance. Each row shows the insider, transaction code, share count, and dollar value.

How often is BY insider data updated?

Continuously. We read from SEC EDGAR, so new Form 4 filings for BYLINE BANCORP, INC. usually appear here within minutes of being accepted by the SEC.

What does "net insider flow" mean?

It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.

Why do some rows show grants or option exercises instead of buys?

Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.

Is this investment advice?

No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.