William Jack Plants II - 20 Mar 2026 Form 4 Insider Report for FINANCIAL INSTITUTIONS INC (FISI)

Reporting relationship: Chief Financial Officer
Issuer ticker: FISI
Reported as of: 20 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 23 Mar 2026, 16:05:17 UTC
Prior SEC filing: 12 Mar 2026
Source filing: View source filing
Reporting owner signature: SANDRA L. BYERS By Power of Attorney from William Jack Plants II

Key filing fact

William Jack Plants II filed Form 4 for FINANCIAL INSTITUTIONS INC (FISI) on 23 Mar 2026.

Key facts

This page summarizes William Jack Plants II's Form 4 filing for FINANCIAL INSTITUTIONS INC (FISI).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 23 Mar 2026, 16:05.

Change

Previous filing in this sequence was filed on 12 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001846495 Primary reporting owner

Plants William Jack II

Relationship: Chief Financial Officer
Address: 220 LIBERTY STREET, WARSAW
Signature: SANDRA L. BYERS By Power of Attorney from William Jack Plants II
Signature date: 23 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

FISI transaction

Common Stock

Options Exercise

Transaction value
Shares: +2,898
Change %: +47%
Price
Shares after: 9,057
Date: 20 Mar 2026
Ownership: Direct
Footnotes: F1

FISI transaction

Common Stock

Tax liability

Transaction value
Shares: -1,044
Change %: -12%
Price: $30.59^*
Shares after: 8,013
Date: 20 Mar 2026
Ownership: Direct

FISI holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 1,813
Date: 20 Mar 2026
Ownership: Held in 401K Plan

FISI holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 4,937
Date: 20 Mar 2026
Ownership: Held in IRA
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

FISI transaction Derivative

Restricted Stock Unit

Options Exercise

Transaction value
Shares: -2,898
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 20 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 2,898
Exercise price
Footnotes: F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

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

Footnote F2

Represents 113 shares acquired under the FISI 401(k) plan since the date of the reporting person's last ownership report.

Footnote F3

Restricted stock units convert into shares of common stock on a one-for-one basis.