Form 8-K

8-K — FINANCIAL INSTITUTIONS INC

Accession: 0001193125-26-232561

Filed: 2026-05-20

Period: 2026-05-20

CIK: 0000862831

SIC: 6021 (NATIONAL COMMERCIAL BANKS)

Item: Regulation FD Disclosure

Item: Financial Statements and Exhibits

Documents

8-K — fisi-20260520.htm (Primary)

EX-99.1 (fisi-ex99_1.htm)

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8-K

8-K (Primary)

Filename: fisi-20260520.htm · Sequence: 1

8-K

0000862831false00008628312026-05-202026-05-20

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 20, 2026

Financial Institutions, Inc.

(Exact name of Registrant as Specified in Its Charter)

New York

0-26481

16-0816610

(State or Other Jurisdiction

of Incorporation)

(Commission File Number)

(IRS Employer

Identification No.)

220 Liberty Street

Warsaw, New York

14569

(Address of Principal Executive Offices)

(Zip Code)

Registrant’s Telephone Number, Including Area Code: 585 786-1100

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading

Symbol(s)

Name of each exchange on which registered

Common stock, par value $0.01 per share

FISI

Nasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 7.01 Regulation FD Disclosure.

Financial Institutions, Inc. (the “Company”) issued a press release announcing that on February 12, 2026, its Board of Directors declared a cash dividend of $0.32 per common share. The Company also announced dividends of $0.75 per share on Series A 3% Preferred Stock and $2.12 per share on Series B-1 8.48% Preferred Stock. All dividends are payable July 2, 2026 to shareholders of record as of June 12, 2026.

The press release issued by the Company is furnished as Exhibit 99.1 to this Form 8-K pursuant to Item 7.01 of Form 8-K and shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934 (“Exchange Act”), as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, of the Exchange Act, whether made before or after the date of this report, except as shall be expressly set forth by specific reference in such filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit

Number

Description

Location

99.1

Press Release issued by Financial Institutions, Inc. on May 20, 2026

Filed Herewith

104

Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Financial Institutions, Inc.

Date:

May 20, 2026

By:

/s/ W. Jack Plants, II

W. Jack Plants, II

Executive Vice President, Chief Financial Officer

and Treasurer

EX-99.1

Filename: fisi-ex99_1.htm · Sequence: 2

EX-99.1

Financial Institutions, Inc. Announces Quarterly Cash Dividend

WARSAW, N.Y., May 20, 2026 — Financial Institutions, Inc. (NASDAQ: FISI) (the “Company”), parent company of Five Star Bank and Courier Capital, LLC, announced that today its Board of Directors approved a quarterly cash dividend of $0.32 per outstanding common share.

The Company also announced dividends of $0.75 per share on its Series A 3% preferred stock and $2.12 per share on its Series B-1 8.48% preferred stock.

All dividends are payable July 2, 2026, to shareholders of record on June 12, 2026.

About Financial Institutions, Inc.

Financial Institutions, Inc. (NASDAQ: FISI) is a financial holding company with approximately $6.3 billion in assets as of March 31, 2026, offering banking and wealth management products and services. Its Five Star Bank subsidiary provides consumer and commercial banking and lending services to individuals, municipalities and businesses through banking locations spanning Western and Central New York and a commercial loan production office serving the Mid-Atlantic region. Courier Capital, LLC offers customized investment management, financial planning and consulting services to individuals and families, businesses, institutions, non-profits and retirement plans. Learn more at Five-StarBank.com and FISI-Investors.com.

For additional information contact:

Kate Croft

Director of Investor Relations and Corporate Communications

(716) 817-5159

klcroft@five-starbank.com

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