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FINANCIAL INSTITUTIONS INC

For the period ended Dec 31, 2025. Filed Mar 9, 2026.

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About this filing

A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Mar 9, 2026

FISI$40.22+1.2%Stored close · as of Nov 9, 2026

Extracted filing text, with the paragraph anchors used by the comparison.

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Contents

Signatures

Pursuant to the requirements of Section 13 or 15(d) of the Exchange Act, the registrant caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

FINANCIAL INSTITUTIONS, INC.
March 9, 2026By:/s/ Martin K. Birmingham
Martin K. Birmingham
President and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

SignaturesTitleDate
/s/ Martin K. BirminghamDirector, President and Chief Executive OfficerMarch 9, 2026
Martin K. Birmingham(Principal Executive Officer)
/s/ W. Jack Plants, IIExecutive Vice President, Chief Financial Officer and TreasurerMarch 9, 2026
W. Jack Plants, II(Principal Financial Officer)
/s/ Sandra L. ByersSenior Vice President and ControllerMarch 9, 2026
Sandra L. Byers(Principal Accounting Officer)
/s/ Donald K. BoswellDirectorMarch 9, 2026
Donald K. Boswell
/s/ Dawn H. BurlewDirectorMarch 9, 2026
Dawn H. Burlew
/s/ Andrew W. Dorn, Jr.DirectorMarch 9, 2026
Andrew W. Dorn, Jr.
/s/ Robert M. GlaserDirectorMarch 9, 2026
Robert M. Glaser
/s/ Bruce W. HartingDirectorMarch 9, 2026
Bruce W. Harting
/s/ Susan R. HollidayDirector, ChairMarch 9, 2026
Susan R. Holliday
/s/ Robert N. LatellaDirectorMarch 9, 2026
Robert N. Latella
/s/ Angela J. PanzarellaDirectorMarch 9, 2026
Angela J. Panzarella
/s/ Robert L. SchraderDirectorMarch 9, 2026
Robert L. Schrader
/s/ Kim E. VanGelderDirectorMarch 9, 2026
Kim E. VanGelder
/s/ Mark A. ZupanDirectorMarch 9, 2026
Mark A. Zupan
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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.