Delivering on a brighter tomorrow. FINANCIAL INSTITUTIONS, INC. (Nasdaq: FISI) Fourth Quarter and Year-End 2020 Earnings Presentation January 28, 2021 Safe Harbor Statement Statements contained in this presentation which are not historical facts and which pertain to future operating results of Financial Institutions, Inc. (the "Company") and its subsidiaries constitute "forward- looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Similarly, statements that describ ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ________ to ________ Commission File Number: 000-26481 Financial Institutions, Inc. (Exact name of registrant as specified in its charte ...

Delivering on a brighter tomorrow. FINANCIAL INSTITUTIONS, INC. (Nasdaq: FISI) Third Quarter 2020 Earnings Presentation October 29, 2020 Safe Harbor Statement Statements contained in this presentation which are not historical facts and which pertain to future operating results of Financial Institutions, Inc. (the "Company") and its subsidiaries constitute "forward- looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Similarly, statements that describe the objectiv ...

Delivering on a brighter tomorrow. FINANCIAL INSTITUTIONS, INC. (Nasdaq: FISI) Investor Presentation September 2020 Safe Harbor Statement Statements contained in this presentation which are not historical facts and which pertain to future operating results of Financial Institutions, Inc. (the "Company") and its subsidiaries constitute "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Similarly, statements that describe the objectives, plans or goals of ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ________ to ________ Commission File Number: 000-26481 Financial Institutions, Inc. (Exact name of registrant as specified in its charter) NE ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ________ to ________ Commission File Number: 000-26481 (Exact name of registrant as specified in its charter) NEW YORK 16-0816610 (State or ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Mark One) Form 10-K [ X ]ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 OR [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 000-26481 FINANCIAL INSTITUTIONS, INC. (Exact name of registrant as specified in its charter) NEW YORK 16-0816610 ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ________ to ________ Commission File Number: 000-26481 (Exact name of registrant as specified in its charter) NEW YORK 16-0816610 (State ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2019 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ________ to ________ Commission File Number: 000-26481 (Exact name of registrant as specified in its charter) NEW YORK 16-0816610 (State or o ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ________ to ________ Commission File Number: 000-26481 (Exact name of registrant as specified in its charter) | --- | --- | --- | --- | |--- ...