Byline Bancorp director shifts 18,500 BY shares into family trust

Byline Bancorp, Inc. director reported an internal transfer of company stock for estate planning.

Rhea-AI Filing Summary

Byline Bancorp, Inc. director reported an internal transfer of company stock for estate planning. On 12/10/2025, 18,500 shares of common stock were moved from the director’s direct ownership to The Herseth Family Revocable Trust Dated 12/02/25. The Form 4 lists the transaction as a disposition of 18,500 directly held shares and an acquisition of the same 18,500 shares by the trust, with no derivative securities involved. This kind of filing documents a change in the form of beneficial ownership, rather than a market purchase or sale.

Insider Trade Summary

Other: 37,000 shares

Other 2 txns

Insider HERSETH MARY JO S.

Role Director

Type	Security	Shares	Price	Value
Other	Common stock	18,500	$0.00	$0.00
Other	Common stock	18,500	$0.00	$0.00

Holdings After Transaction: Common stock — 0 shares (Direct); Common stock — 18,500 shares (Indirect, The Herseth Family Revocable Trust Dated 12/02/25)

Footnotes (1)

1. F1. Transfer to The Herseth Family Revocable Trust Dated 12/02/25 for estate planning purposes.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Byline Bancorp (BY) report on this Form 4?

The filing reports that a director transferred 18,500 shares of common stock from direct ownership to The Herseth Family Revocable Trust Dated 12/02/25 on 12/10/2025.

Was the Byline Bancorp (BY) Form 4 transaction a market sale or purchase?

No. The Form 4 describes an internal transfer for estate planning purposes, showing a disposition of 18,500 directly held shares and an acquisition of the same amount by a family trust.

Who is the reporting person in this Byline Bancorp (BY) Form 4 and what is their role?

The reporting person is identified as a Director of Byline Bancorp, Inc., indicating a board-level insider relationship with the issuer.

How many Byline Bancorp (BY) shares did the trust receive in the reported transaction?

The trust, named The Herseth Family Revocable Trust Dated 12/02/25, is shown as acquiring 18,500 shares of common stock on 12/10/2025.

Does this Byline Bancorp (BY) Form 4 report any derivative securities?

No. The Form 4 includes a table for derivative securities but shows no derivative transactions reported.

What reason is given for the transfer of Byline Bancorp (BY) shares?

The explanation states that the 18,500-share transfer to the family trust was made for estate planning purposes.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 12/10/2025 - 04:05 PM EST Learn about SEC filing dates

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^*

HERSETH MARY JO S.

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
12/10/2025

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	12/10/2025		J		18,500	D	(1)	0	D
Common stock	12/10/2025		J		18,500	A	(1)	18,500	I	The Herseth Family Revocable Trust Dated 12/02/25

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:

1. Transfer to The Herseth Family Revocable Trust Dated 12/02/25 for estate planning purposes.

	/s/ Thomas J. Bell III, Attorney-in-Fact	12/10/2025
	** 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.