William Jack Plants II - 05 Mar 2026 Form 4 Insider Report for FINANCIAL INSTITUTIONS INC (FISI)

Role: Chief Financial Officer
Signature: SANDRA L. BYERS By Power of Attorney from William Jack Plants II
Issuer symbol: FISI
Transactions as of: 05 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 06 Mar 2026, 16:05:13 UTC
Previous filing: 09 Jan 2026
Next filing: 12 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Plants William Jack II	Chief Financial Officer	220 LIBERTY STREET, WARSAW	SANDRA L. BYERS By Power of Attorney from William Jack Plants II	06 Mar 2026	0001846495

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	FISI	Common Stock						5,499	05 Mar 2026	Direct
holding	FISI	Common Stock						1,700	05 Mar 2026	Held in 401K Plan
holding	FISI	Common Stock						4,937	05 Mar 2026	Held in IRA

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	FISI	Restricted Stock Units						0	05 Mar 2026	Restricted Stock Units	2,897		Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

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