| 2026-02-27 | 10-K | 10.27 | Consulting Agreement, dated January 2, 2026, by and among Community Financial System, Inc., Community Bank, N.A., and Jeffrey Levy. (1) (2) |
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| 2024-09-30 | 8-K | 10.1 | Change in Control Agreement, dated January 1, 2024, by and among Deresa F. Durkee, Community Financial System, Inc. and Community Bank, N.A. |
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| 2024-07-19 | 8-K | 10.2 | Community Financial System, Inc. Executive Severance Plan, as amended, July 17, 2024 |
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| 2024-07-19 | 8-K | 10.1 | Amendment to Employment Agreement, dated July 17, 2024, by and among Community Financial System, Inc., Community Bank, N.A., and Dimitar A. Karaivanov |
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| 2024-05-17 | 8-K | 10.1 | Consulting Agreement, dated May 15, 2024, by and among Community Financial System, Inc., Community Bank, N.A., and Mark E. Tryniski |
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| 2023-07-21 | 8-K | 10.1 | Community Bank System, Inc. Executive Severance Plan, dated July 18, 2023 |
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| 2023-07-05 | 8-K | 10.1 | Employment Agreement, dated July 5, 2023, by and among Community Bank System, Inc., Community Bank, N.A., and Dimitar Karaivanov |
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| 2022-08-26 | 8-K | 10.2 | Retirement Agreement, dated August 24, 2022, by and among Community Bank System, Inc., Community Bank, N.A. and Joseph F. Serbun |
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| 2022-08-26 | 8-K | 10.1 | Amendment to Employment Agreement, effective August 24, 2022, by and among Community Bank System, Inc., Community Bank, N.A., and Dimitar Karaivanov |
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| 2022-05-10 | 10-Q | 10.2 | Employment Agreement, dated March 22, 2021, by and among Community Bank System, Inc., Community Bank, N.A. and Dimitar Karaivanov. (1)(2) |
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| 2022-05-06 | 8-K | 10.1 | Community Bank System, Inc. 2022 Long-Term Incentive Plan, as amended |
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| 2022-04-29 | 8-K | 10.1 | Amendment to Employment Agreement, dated April 28, 2022, by and among Community Bank System, Inc., Community Bank, N.A. and George J. Getman. |
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| 2022-01-06 | 8-K | 10.1 | Employment Agreement, dated January 5, 2022, by and among Community Bank System, Inc., Community Bank, N.A., and Joseph F. Serbun |
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| 2021-05-10 | 10-Q | 10.3 | Employment Agreement, dated December 29, 2020, by and among Community Bank System, Inc., Community Bank, N.A. and Joseph J. Lemchak. (1)(2) |
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| 2021-01-06 | 8-K | 10.2 | Employment Agreement, dated January 4, 2021, by and among Community Bank System, Inc., Community Bank, N.A. and Joseph E. Sutaris |
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| 2021-01-06 | 8-K | 10.1 | Employment Agreement, dated January 4, 2021, by and among Community Bank System, Inc., Community Bank, N.A. and Mark E. Tryniski |
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| 2020-03-19 | 8-K | 10.2 | Amendment to Employment Agreement, dated March 13, 2020, by and among Community Bank System, Inc., Community Bank, N.A. and Joseph F. Serbun |
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| 2020-03-19 | 8-K | 10.1 | Retirement and Release Agreement, dated March 13, 2020, by and among Community Bank System, Inc., Community Bank, N.A. and Scott A. Kingsley |
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| 2020-01-07 | 8-K | 10.2 | Employment Agreement, dated December 31, 2019, by and among Community Bank System, Inc., Community Bank, N.A. and George J. Getman |
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| 2020-01-07 | 8-K | 10.1 | Employment Agreement, dated December 31, 2019, by and among Community Bank System, Inc., Community Bank, N.A. and Scott A. Kingsley |
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| 2019-01-08 | 8-K | 10.1 | Employment Agreement, dated January 4, 2019, by and among Community Bank System, Inc., Community Bank, N.A. and Joseph F. Serbun. |
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| 2018-05-21 | 8-K | 10.4 | Community Bank System, Inc. Restoration Plan, effective June 1, 2018 |
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| 2018-05-21 | 8-K | 10.3 | Amendment to Employment Agreement, effective June 1, 2018, by and among Community Bank System, Inc., Community Bank, N.A. and Joseph F. Serbun. |
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| 2018-05-21 | 8-K | 10.2 | Employment Agreement, effective June 1, 2018, by and among Community Bank System, Inc., Community Bank, N.A. and Joseph E. Sutaris. |
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| 2018-05-21 | 8-K | 10.1 | Amendment to Employment Agreement, effective June 1, 2018, by and among Community Bank System, Inc., Community Bank, N.A. and Scott Kingsley. |
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| 2018-03-20 | 8-K | 10.1 | Amendment to Employment Agreement, dated March 19, 2018, by and among Community Bank System, Inc., Community Bank, N.A. and Brian D. Donahue. |
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| 2018-01-05 | 8-K | 10.2 | Amendment to Supplemental Retirement Plan Agreement, dated January 5, 2018, by and among Community Bank System, Inc., Community Bank, N.A. and Mark E. Tryniski. |
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| 2018-01-05 | 8-K | 10.1 | Employment Agreement, dated January 5, 2018, by and among Community Bank System, Inc., Community Bank, N.A. and Mark E. Tryniski |
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| 2017-05-02 | 8-K | 10.1 | Comunity Bank System, Inc. 2014 Long-Term Incentive Plan, as amended |
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| 2017-01-06 | 8-K | 10.2 | Employment Agreement, dated January 1, 2017, by and among Community Bank System, Inc., Community Bank, N.A. and George J. Getman. |
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| 2017-01-06 | 8-K | 10.1 | Employment Agreement, dated January 1, 2017, by and among Community Bank System, Inc., Community Bank, N.A. and Scott Kingsley. |
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| 2016-03-16 | 8-K | 10.2 | Employment Agreement, signed on March 11, 2016, by and among Community Bank System, Inc., Community Bank, N.A. and Joseph F. Serbun. |
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| 2016-03-16 | 8-K | 10.1 | Employment Agreement, signed on March 11, 2016, by and among Community Bank System, Inc., Community Bank, N.A. and Brian D. Donahue. |
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| 2015-01-02 | 8-K | 10.1 | 2014 EX 10.1 MET EMPLOYMENT AGREEMENT |
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| 2014-01-03 | 8-K | 10.2 | 2013 KINGSLEY EMPLOYMENT AGREEMENT |
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| 2014-01-03 | 8-K | 10.1 | 2013 GETMAN EMPLOYMENT AGREEMENT |
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| 2013-10-23 | 8-K | 10.3 | 2013 EX 10.3 GETMAN SERP AGREEMENT |
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| 2013-10-23 | 8-K | 10.2 | 2013 EX 10.2 DONAHUE SERP AGREEMENT |
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| 2013-10-23 | 8-K | 10.1 | 2013 EX 10.1 DONAHUE EMPLOYMENT AGREEMENT |
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| 2013-05-10 | 10-Q | 10.1 | Employment Agreement, effective January 1, 2013, by and between Community Bank System, Inc., Community Bank, N.A. and Joseph F. Serbun. |
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| 2011-12-30 | 8-K | 10.1 | EMPLOYMENT AGREEMENT OF OFFICER |
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| 2011-05-12 | 8-K | 10.1 | CBNA 8-K 2004 LONG-TERM INCENTIVE COMP PROGRAM TO BE AMENDED EXHIBIT 10.1 |
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| 2011-01-06 | 8-K | 10.2 | 2011 8-K GETMAN AGREEMENT |
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| 2011-01-06 | 8-K | 10.1 | 2011 8-K KINGSLEY AGREEMENT |
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| 2010-02-03 | 8-K | 10.1 | 8K DONAHUE AGREEMENT EX 10.1 |
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| 2009-10-01 | 8-K | 10.1 | 8K KINGSLEY RETIREMENT EX 10.1 |
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| 2009-04-14 | 8-K | 10.1 | Supplemental Retirement Plan Agreement, dated April 9, 2009, by and among Community Bank System, Inc., Community Bank, N.A. and George J. Getman attached hereto. |
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| 2009-03-19 | 8-K | 10.2 | Supplemental Retirement Plan Agreement, dated December 30, 2008, by and among Community Bank System, Inc., Community Bank, N.A. and Mark E. Tryniski. |
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| 2009-03-19 | 8-K | 10.1 | Employment Agreement, dated March 18, 2009, by and among Community Bank System, Inc., Community Bank, N.A. and Mark E. Tryniski attached hereto. |
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| 2009-03-13 | 10-K | 10.9 | EMPLOYMENT AGREEMENT |
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