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[Form 4] BYLINE BANCORP, INC. Insider Trading Activity

Filing Impact
(High)
Filing Sentiment
(Negative)
Form Type
4
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Byline Bancorp (BY)

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SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
ABRAHAM THOMAS

(Last) (First) (Middle)
180 NORTH LASALLE STREET
SUITE 300

(Street)
CHICAGO IL 60601

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
BYLINE BANCORP, INC. [ BY ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
PRESIDENT, SBC
3. Date of Earliest Transaction (Month/Day/Year)
10/28/2025
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Comon stock 10/28/2025 S 3,400 D $26.9755 58,882 D
Comon stock 10/28/2025 S 20,000 D $26.8715 38,882 D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Explanation of Responses:
/s/ Thomas J. Bell III, Attorney-in-Fact 10/29/2025
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Byline Bancorp (BY) disclose in this Form 4?

An officer executed two sales on 10/28/2025 totaling 23,400 shares of common stock.

At what prices were the BY shares sold?

The sales were at $26.9755 for 3,400 shares and $26.8715 for 20,000 shares.

How many BY shares does the officer own after the transactions?

Following the reported sales, the officer directly owns 38,882 shares.

What was the transaction code on the Form 4 for BY?

The transactions are marked with code S, indicating open-market or private sale of non-derivative securities.

What is the officer’s relationship to Byline Bancorp (BY)?

The reporting person is an Officer with the title PRESIDENT, SBC.

Were any derivative securities involved?

No derivative securities are listed in the excerpt; only common stock sales are shown.
Byline Bancorp

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30.74M
32.73%
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0.69%
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