{"transactions":[{"id":796358,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Phantom Stock (Deferred Stock Units)","published_at":"2026-05-01T20:21:22.000Z","date":"2026-04-29","kind":"exercise","planned":false,"acquired":false,"shares":9,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"LTIP\"). Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On April 29, 2026, the reporting person's phantom stock units were settled for 9 shares of Community Financial System, Inc. common stock, and .4418 shares were settled in cash at the price of $63.17 per share."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"LTIP\"). Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"LTIP\"). Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 9.4418 units of phantom stock acquired on April 10, 2026 under the LTIP's dividend reinvestment feature."}],"balance_after":1220,"derivative":{"underlying":"Common Stock","underlying_shares":9},"source":{"system":"sec-edgar","filing":"0000723188-26-000084","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/723188/000072318826000084/form4.xml","form_type":"4"}},{"id":796357,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Common Stock","published_at":"2026-05-01T20:21:22.000Z","date":"2026-04-29","kind":"exercise","planned":false,"acquired":true,"shares":9,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On April 29, 2026, the reporting person's phantom stock units were settled for 9 shares of Community Financial System, Inc. common stock, and .4418 shares were settled in cash at the price of $63.17 per share."}],"balance_after":4829.4908,"source":{"system":"sec-edgar","filing":"0000723188-26-000084","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/723188/000072318826000084/form4.xml","form_type":"4"}},{"id":831622,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Phantom Stock (Deferred Stock Units)","published_at":"2026-03-23T15:05:04.000Z","date":"2026-03-19","kind":"exercise","planned":false,"acquired":false,"shares":1254,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"LTIP\"). Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On March 19, 2026, the reporting person's phantom stock units were settled for 1,254 shares of Community Financial System, Inc. common stock, and .5514 shares were settled in cash at the price of $55.61 per share."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"LTIP\"). Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"LTIP\"). Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."}],"balance_after":1220,"derivative":{"underlying":"Common Stock","underlying_shares":1254},"source":{"system":"sec-edgar","filing":"0000723188-26-000078","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/723188/000072318826000078/form4.xml","form_type":"4"}},{"id":831621,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Common Stock","published_at":"2026-03-23T15:05:04.000Z","date":"2026-03-19","kind":"exercise","planned":false,"acquired":true,"shares":1254,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On March 19, 2026, the reporting person's phantom stock units were settled for 1,254 shares of Community Financial System, Inc. common stock, and .5514 shares were settled in cash at the price of $55.61 per share."}],"balance_after":4820.4908,"source":{"system":"sec-edgar","filing":"0000723188-26-000078","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/723188/000072318826000078/form4.xml","form_type":"4"}},{"id":834175,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Phantom Stock (Deferred Stock Units)","published_at":"2026-03-19T13:56:08.000Z","date":"2026-03-17","kind":"grant","planned":false,"acquired":true,"shares":1220,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"LTIP\"). Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"LTIP\"). Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"LTIP\"). Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 9.4706, 10.4729, and 9.6079 units of phantom stock acquired as dividend equivalents on July 10, 2025, October 10, 2025, and January 12, 2026, respectively, under the LTIP."}],"balance_after":2474.5514,"derivative":{"underlying":"Common Stock","underlying_shares":1220},"source":{"system":"sec-edgar","filing":"0000723188-26-000062","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/723188/000072318826000062/form4.xml","form_type":"4"}},{"id":1171405,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Phantom Stock (Deferred Stock Units)","published_at":"2025-04-16T21:30:25.000Z","date":"2025-04-14","kind":"exercise","planned":false,"acquired":false,"shares":12,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 12.7836 units of phantom stock acquired on April 10, 2025 under the Plan's dividend reinvestment feature."}],"balance_after":1225,"derivative":{"underlying":"Common Stock","underlying_shares":12},"source":{"system":"sec-edgar","filing":"0001127602-25-012170","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/723188/000112760225012170/form4.xml","form_type":"4"}},{"id":1171404,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Common Stock","published_at":"2025-04-16T21:30:25.000Z","date":"2025-04-14","kind":"exercise","planned":false,"acquired":true,"shares":12,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On April 14, 2025, the reporting person's phantom stock units were settled for 12 shares of Community Financial System, Inc. common stock, and .7836 shares were settled in cash at the price of $51.47 per share."}],"balance_after":3566.4908,"source":{"system":"sec-edgar","filing":"0001127602-25-012170","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/723188/000112760225012170/form4.xml","form_type":"4"}},{"id":1196391,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Phantom Stock (Deferred Stock Units)","published_at":"2025-03-20T16:45:02.000Z","date":"2025-03-19","kind":"exercise","planned":false,"acquired":false,"shares":1430,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."}],"balance_after":1225,"derivative":{"underlying":"Common Stock","underlying_shares":1430},"source":{"system":"sec-edgar","filing":"0001127602-25-010088","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/723188/000112760225010088/form4.xml","form_type":"4"}},{"id":1196390,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Phantom Stock (Deferred Stock Units)","published_at":"2025-03-20T16:45:02.000Z","date":"2025-03-18","kind":"grant","planned":false,"acquired":true,"shares":1225,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The reporting person has received deferred stock units under the Community Financial System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Financial System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 13.032, 11.2154, and 11.1256 units of phantom stock acquired as dividend equivalents on July 10, 2024, October 10, 2024, and January 10, 2025, respectively, under the Plan."}],"balance_after":2655.373,"derivative":{"underlying":"Common Stock","underlying_shares":1225},"source":{"system":"sec-edgar","filing":"0001127602-25-010088","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/723188/000112760225010088/form4.xml","form_type":"4"}},{"id":1196389,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Common Stock","published_at":"2025-03-20T16:45:02.000Z","date":"2025-03-19","kind":"exercise","planned":false,"acquired":true,"shares":1430,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On March 19, 2025, the reporting person's phantom stock units were settled for 1,430 shares of Community Financial System, Inc. common stock, and .373 shares were settled in cash at the price of $58.10 per share."}],"balance_after":3554.4908,"source":{"system":"sec-edgar","filing":"0001127602-25-010088","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/723188/000112760225010088/form4.xml","form_type":"4"}},{"id":1566619,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Phantom Stock (Deferred Stock Units)","published_at":"2024-03-20T18:26:33.000Z","date":"2024-03-19","kind":"grant","planned":false,"acquired":true,"shares":1395,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The reporting person has received deferred stock units under the Plan. Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Bank System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The reporting person has received deferred stock units under the Plan. Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Bank System, Inc. common stock and will be settled in common stock at a predetermined date."}],"balance_after":1395,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":1395},"source":{"system":"sec-edgar","filing":"0001127602-24-010741","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/723188/000112760224010741/form4.xml","form_type":"4"}},{"id":1575835,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Phantom Stock (Deferred Stock Units)","published_at":"2024-03-15T16:29:26.000Z","date":"2024-03-14","kind":"exercise","planned":false,"acquired":false,"shares":1198.8194,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The reporting person has received deferred stock units under the Community Bank System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Bank System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The reporting person has received deferred stock units under the Community Bank System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Bank System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The reporting person has received deferred stock units under the Community Bank System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Bank System, Inc. common stock and will be settled in common stock at a predetermined date."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1198.8194},"source":{"system":"sec-edgar","filing":"0001127602-24-010226","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/723188/000112760224010226/form4.xml","form_type":"4"}},{"id":1575834,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-03-15T16:29:26.000Z","date":"2024-03-14","kind":"exercise","planned":false,"acquired":true,"shares":1198.8194,"price":45.74,"value":54833.999356,"ownership":{"direct":true},"balance_after":2124.4908,"source":{"system":"sec-edgar","filing":"0001127602-24-010226","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/723188/000112760224010226/form4.xml","form_type":"4"}},{"id":1953053,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Phantom Stock (Deferred Stock Units)","published_at":"2023-03-15T16:56:51.000Z","date":"2023-03-15","kind":"exercise","acquired":false,"shares":661.6714,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The reporting person has received deferred stock units under the Community Bank System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Bank System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The reporting person has received deferred stock units under the Community Bank System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Bank System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The reporting person has received deferred stock units under the Community Bank System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Bank System, Inc. common stock and will be settled in common stock at a predetermined date."}],"balance_after":1154,"derivative":{"underlying":"Common Stock","underlying_shares":661.6714},"source":{"system":"sec-edgar","filing":"0001127602-23-010259","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/723188/000112760223010259/form4.xml","form_type":"4"}},{"id":1953052,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Phantom Stock (Deferred Stock Units)","published_at":"2023-03-15T16:56:51.000Z","date":"2023-03-14","kind":"grant","acquired":true,"shares":1154,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The reporting person has received deferred stock units under the Community Bank System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Bank System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The reporting person has received deferred stock units under the Community Bank System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Bank System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The reporting person has received deferred stock units under the Community Bank System, Inc. 2022 Long-Term Incentive Plan, as amended (the \"Plan\").  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Bank System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 17.6714 units of phantom stock acquired as dividend equivalents under the Plan."}],"balance_after":1815.6714,"derivative":{"underlying":"Common Stock","underlying_shares":1154},"source":{"system":"sec-edgar","filing":"0001127602-23-010259","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/723188/000112760223010259/form4.xml","form_type":"4"}},{"id":1953051,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Common Stock","published_at":"2023-03-15T16:56:51.000Z","date":"2023-03-15","kind":"exercise","acquired":true,"shares":661.6714,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":925.6714,"source":{"system":"sec-edgar","filing":"0001127602-23-010259","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/723188/000112760223010259/form4.xml","form_type":"4"}},{"id":2332176,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Phantom Stock (Deferred Stock Units)","published_at":"2022-03-16T21:28:19.000Z","date":"2022-03-15","kind":"grant","acquired":true,"shares":644,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The reporting person has received deferred stock units under the Community Bank System, Inc. 2014 Long-Term Incentive Plan.  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Bank System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The reporting person has received deferred stock units under the Community Bank System, Inc. 2014 Long-Term Incentive Plan.  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Bank System, Inc. common stock and will be settled in common stock at a predetermined date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The reporting person has received deferred stock units under the Community Bank System, Inc. 2014 Long-Term Incentive Plan.  Each phantom stock unit which represents a deferred stock unit is the economic equivalent of one share of Community Bank System, Inc. common stock and will be settled in common stock at a predetermined date."}],"balance_after":644,"derivative":{"underlying":"Common Stock","underlying_shares":644},"source":{"system":"sec-edgar","filing":"0001127602-22-009516","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/723188/000112760222009516/form4.xml","form_type":"4"}},{"id":2435487,"issuer":{"id":4178,"kind":"organization","name":"COMMUNITY FINANCIAL SYSTEM, INC.","symbol":"CBU"},"owners":[{"id":50445,"kind":"person","name":"Knauss Jeffery J","position":1,"cik":"0001900543","reported_name":"Knauss Jeffery J","relationship":{"director":true}}],"security":"Common Stock","published_at":"2022-01-14T22:14:52.000Z","date":"2022-01-07","kind":"purchase","acquired":true,"shares":250,"price":77.27,"value":19317.5,"ownership":{"direct":true},"balance_after":264,"source":{"system":"sec-edgar","filing":"0001127602-22-001532","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/723188/000112760222001532/form4.xml","form_type":"4"}}]}