FISI executive updates restricted stock holdings

FINANCIAL INSTITUTIONS INC executive Eric W. Marks reported his equity holdings in a Form 4.

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Rhea-AI Filing Summary

FINANCIAL INSTITUTIONS INC executive Eric W. Marks reported his equity holdings in a Form 4. As of the reported date, he directly holds 2,074 restricted stock units, each representing a contingent right to receive one share of FISI common stock, and no shares of common stock directly.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider MARKS ERIC W.

Role Chief Consumer Banking Officer

Type	Security	Shares	Price	Value
holding	Restricted Stock Units	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Units — 2,074 contracts (Direct); Common Stock — 0 shares (Direct)

Footnotes (1)

F1. Each restricted stock unit represents a contingent right to receive one share of FISI common stock.

FAQ

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

What insider activity did FISI executive Eric W. Marks report?

Eric W. Marks reported his current equity holdings, not a clear buy or sell transaction. The Form 4 lists 2,074 restricted stock units and zero directly held common shares as of the reported date.

How many restricted stock units does Eric W. Marks hold in FISI?

Eric W. Marks holds 2,074 restricted stock units in FINANCIAL INSTITUTIONS INC. Each unit represents a contingent right to receive one share of FISI common stock, according to the filing footnote.

Did Eric W. Marks buy or sell FISI common stock in this Form 4?

The Form 4 does not show a defined buy or sell transaction. It records holdings with transaction codes classified as unknown, leaving total directly held common stock at zero shares following the reported transactions.

What does each FISI restricted stock unit reported by Eric W. Marks represent?

Each restricted stock unit reported by Eric W. Marks represents a contingent right to receive one share of FISI common stock. This means he may receive one common share for each unit, subject to applicable vesting or other conditions.

How many FISI common shares does Eric W. Marks hold directly after the reported date?

After the reported date, Eric W. Marks is listed as holding zero shares of FISI common stock directly. His equity exposure in the filing comes from 2,074 restricted stock units rather than currently owned common shares.

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Accepted by SEC EDGAR 03/06/2026 - 04:06 PM EST

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^*

MARKS ERIC W.

(Last)

(First)

(Middle)

220 LIBERTY STREET

(Street)

WARSAW

14569

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
FINANCIAL INSTITUTIONS INC [ FISI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

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

3. Date of Earliest Transaction (Month/Day/Year)
03/05/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock								0	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Units	⁽¹⁾							02/23/2029	02/23/2029	Restricted Stock Units	2,074		0	D

Explanation of Responses:

1. Each restricted stock unit represents a contingent right to receive one share of FISI common stock.

	Sandra A. Byers by Power of Attorney from Eric W. Marks	03/06/2026
	** 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.

Source: View Original Filing on SEC EDGAR