BY
Herseth Mary Jo S., BY's Director, spent $21K of their own money on 1,040 shares at $20, growing their stake 7%.
+$21K
1,040 sh @ $20
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 firstBY
Kistner William G, BY's Director, spent $12.8K of their own money on 600 shares at $21, growing their stake 5%.
+$12.8K
600 sh @ $21
BY
Herseth Mary Jo S., BY's Director, spent $26K of their own money on 1,175 shares at $22, growing their stake 9%.
+$26K
1,175 sh @ $22
BY
Cabrera Phillip R., BY's Director, spent $23.4K of their own money on 1,350 shares at $17, growing their stake 9%.
+$23.4K
1,350 sh @ $17
BY
Herseth Mary Jo S., BY's Director, spent $11K of their own money on 600 shares at $18, growing their stake 5%.
+$11K
600 sh @ $18
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BY
Herseth Mary Jo S., BY's Director, spent $14.6K of their own money on 700 shares at $21, growing their stake 6%.
+$14.6K
700 sh @ $21
BY
Cabrera Phillip R., BY's Director, spent $22.1K of their own money on 1,000 shares at $22, growing their stake 7%.
+$22.1K
1,000 sh @ $22
BY
Herseth Mary Jo S., BY's Director, spent $13.4K of their own money on 590 shares at $23, growing their stake 5%.
+$13.4K
590 sh @ $23
BY
Cabrera Phillip R., BY's Director, spent $30.1K of their own money on 1,300 shares at $23, growing their stake 11%.
+$30.1K
1,300 sh @ $23
BY
Kistner William G, BY's Director, spent $4.1K of their own money on 180 shares at $23, growing their stake 2%.
+$4.1K
180 sh @ $23
BY
Cabrera Phillip R., BY's Director, spent $15.4K of their own money on 670 shares at $23, growing their stake 6%.
+$15.4K
670 sh @ $23
BY
Herseth Mary Jo S., BY's Director, spent $25.1K of their own money on 1,100 shares at $23, growing their stake 10%.
+$25.1K
1,100 sh @ $23
BY
Kistner William G, BY's Director, spent $18.7K of their own money on 800 shares at $23, growing their stake 8%.
+$18.7K
800 sh @ $23
BY
Kistner William G, BY's Director, spent $66.6K of their own money on 2,600 shares at $26, growing their stake 35%.
+$66.6K
2,600 sh @ $26
BY
Herseth Mary Jo S., BY's Director, spent $51.1K of their own money on 2,000 shares at $26, growing their stake 26%.
+$51.1K
2,000 sh @ $26
BY
Kistner William G, BY's Director, spent $30.3K of their own money on 1,300 shares at $23, growing their stake 21%.
+$30.3K
1,300 sh @ $23
BY
Cabrera Phillip R., BY's Director, spent $8K of their own money on 350 shares at $23, growing their stake 3%.
+$8K
350 sh @ $23
BY
Kistner William G, BY's Director, spent $27.5K of their own money on 1,200 shares at $23, growing their stake 24%.
+$27.5K
1,200 sh @ $23
BY
Herseth Mary Jo S., BY's Director, spent $86.5K of their own money on 4,575 shares at $19, growing their stake 141%.
+$86.5K
4,575 sh @ $19
BY
Cabrera Phillip R., BY's Director, spent $111K of their own money on 8,100 shares at $14, growing their stake 261%.
+$111K
8,100 sh @ $14
BY
Kistner William G, BY's Director, spent $17.6K of their own money on 1,700 shares at $10, growing their stake 52%.
+$17.6K
1,700 sh @ $10
BY
Kistner William G, BY's Director, spent $7.3K of their own money on 600 shares at $12, growing their stake 22%.
+$7.3K
600 sh @ $12
BY
Kistner William G, BY's Director, spent $3.7K of their own money on 200 shares at $19, growing their stake 8%.
+$3.7K
200 sh @ $19
BY
Herseth Mary Jo S., BY's Director, spent $19.8K of their own money on 1,000 shares at $20, growing their stake 44%.
+$19.8K
1,000 sh @ $20
BY
Herseth Mary Jo S., BY's Director, spent $44.9K of their own money on 2,250 shares at $20, opening a brand-new position.
+$44.9K
2,250 sh @ $20
BY
Kistner William G, BY's Director, spent $49.1K of their own money on 2,450 shares at $20, opening a brand-new position.
+$49.1K
2,450 sh @ $20
BY
Cabrera Phillip R., BY's Director, spent $47.5K of their own money on 2,500 shares at $19, growing their stake 416%.
+$47.5K
2,500 sh @ $19
BY
Cabrera Phillip R., BY's Director, spent $26K of their own money on 1,600 shares at $16, opening a brand-new position.
+$26K
1,600 sh @ $16
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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.