Insider Filing: William Jack Plants II Reports Ownership Change at FISI

TL;DR

**Insider William Jack Plants II just filed a Form 4 for FISI, signaling a change in his ownership.**

AI Summary

This Form 4 filing, dated March 23, 2026, indicates that William Jack Plants II, an insider at Financial Institutions Inc. (NASDAQ: FISI), has filed a statement of changes in beneficial ownership of securities. While the filing itself doesn't detail specific transactions, it signals that Mr. Plants, whose CIK is 0001846495, has either bought, sold, or been granted shares in the company. This matters to investors because insider activity can provide clues about how those closest to the company view its future prospects, potentially influencing stock price movements.

Why It Matters

Insider transaction filings like this can signal management's confidence (or lack thereof) in the company's future, which can influence investor sentiment and stock price.

Risk Assessment

Risk Level: low — This filing is purely administrative, reporting a change in ownership, and does not inherently carry significant risk without transaction details.

Analyst Insight

Investors should monitor subsequent filings or news for details of the transaction (buy or sell) by William Jack Plants II to understand the implications of this ownership change for Financial Institutions Inc. (FISI).

Key Players & Entities

• Plants William Jack II (person) — Reporting Person, CIK 0001846495
• FINANCIAL INSTITUTIONS INC (company) — Issuer, CIK 0000862831
• 2026-03-23 (date) — Filing Date and Accepted Date

FAQ

Filing Documents

• ownership.html (4)
• ownership.xml (4) — 8KB
• 0001193125-26-119711.txt ( ) — 10KB

From the Filing

SEC FORM 4 SEC Form 4 FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 * Plants William Jack II (Last) (First) (Middle) 220 LIBERTY STREET (Street) WARSAW NEW YORK 14569 (City) (State) (Zip) UNITED STATES (Country) 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 Financial Officer 2a. Foreign Trading Symbol 3. Date of Earliest Transaction (Month/Day/Year) 03/20/2026 6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person 4. If Amendment, Date of Original Filed (Month/Day/Year) 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 03/20/2026 M 2,898 A (1) 9,057 D Common Stock 03/20/2026 F 1,044 D $ 30.59 8,013 D Common Stock 1,813 I Held in 401K Plan Common Stock 4,937 (2) I Held in IRA 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 Restricted Stock Unit (3) 03/20/2026 M 2,898 03/20/2026 03/20/2026 Common Stock 2,898 $ 0 0 D Explanation of Responses: 1. Each restricted stock unit represents a contingent right to receive one share of FISI common stock. 2. Represents 113 shares acquired under the FISI 401(k) plan since the date of the reporting person's last ownership report. 3. Restricted stock units convert into shares of common stock on a one-for-one basis. SANDRA L. BYERS By Power of Attorney from William Jack Plants II 03/23/2026 ** 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. * Form 4: SEC 1474 (03-26)

View Full Filing

View this 4 filing on SEC EDGAR