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

Rhea-AI Filing Summary

BYLINE BANCORP, INC. (BY) reporting person Dana Rose, identified as Chief Human Resources Officer and director, sold 1,999 shares of common stock at a price of $28.7601 per share on 09/12/2025. After the transaction she beneficially owned 10,192 shares, held directly. The Form 4 discloses a routine non-derivative disposition and is signed by an attorney-in-fact for the reporting person.

Positive

• Transaction properly disclosed on Form 4, meeting Section 16 reporting requirements
• Reporting person retains a meaningful direct stake of 10,192 shares after the sale

Negative

• Direct holdings reduced by 1,999 shares as a result of the disposition
• No explanatory note in the filing about the reason for the sale

Insights

Securities Analyst

TL;DR Routine insider sale with limited immediate market impact given the modest size relative to typical public float.

The sale of 1,999 shares at $28.7601 is a straightforward non-derivative disposition by an officer who retains 10,192 shares. This filing meets Section 16 reporting requirements and provides transparency on insider liquidity. Without information on total outstanding shares or recent trading patterns, the transaction appears routine rather than transformational for BY.

Corporate Governance Expert

TL;DR Disclosure complies with insider reporting norms; the sale reduces direct ownership but does not alone indicate governance issues.

The report identifies the reporting person as CHRO and director and shows a direct sale rather than an exercise or derivative transaction. The signature by an attorney-in-fact indicates timely formalization. There is no accompanying explanation for the sale in the form, and no indications of related-party or beneficial indirect holdings in this filing.

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
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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^*

Rose Dana

(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)
	CHIEF HUMAN RESOURCES OFFICER

3. Date of Earliest Transaction (Month/Day/Year)
09/12/2025

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
Common stock	09/12/2025		S		1,999	D	$28.7601	10,192	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 for Dana Rose	09/15/2025
	** 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 transaction did Dana Rose report on BY Form 4?

The report shows a sale of 1,999 shares of BY common stock with a transaction code S executed on 09/12/2025 at a price of $28.7601 per share.

How many BY shares does Dana Rose own after the reported sale?

Following the reported disposition, Dana Rose beneficially owns 10,192 shares, held directly.

What is Dana Rose's role at BYLINE BANCORP?

The form identifies Dana Rose as a Director and the company’s Chief Human Resources Officer.

Was the transaction a derivative or non-derivative trade?

The transaction was a non-derivative common stock disposition; no derivative securities were reported.

Who signed the Form 4 submission?

The Form 4 is signed by Thomas J. Bell, III, Attorney-in-fact for Dana Rose on the signature line.