CBU

SEC source: 0001127602-24-010226 · form4.xml · nonDerivative · entry 1

Knauss Jeffery J · CIK 0001900543 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,124.4908

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-009973 · form4.xml · derivative · entry 3

Fesette Neil E. · CIK 0001485738 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3,631 shares

Expires 2024-03-19

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-009973 · form4.xml · nonDerivative · entry 2

Fesette Neil E. · CIK 0001485738 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,689.6072

SEC source: 0001127602-24-009973 · form4.xml · nonDerivative · entry 1

Fesette Neil E. · CIK 0001485738 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,594.6072

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: Includes 274.097 shares acquired pursuant to the Community Bank System, Inc. Dividend Reinvestment Plan.

SEC source: 0001127602-24-009347 · form4.xml · derivative · entry 3

Abdo Michael N · CIK 0001933852 · EVP and General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 700 shares

Expires 2024-03-19

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: The option vested ratably on March 19, 2015, 2016, 2017, 2018, and 2019.

SEC source: 0001127602-24-009347 · form4.xml · nonDerivative · entry 1

Abdo Michael N · CIK 0001933852 · EVP and General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,833

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-009345 · form4.xml · derivative · entry 3

Whipple John F. · CIK 0001485739 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3,631 shares

Expires 2024-03-19

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-009345 · form4.xml · nonDerivative · entry 2

Whipple John F. · CIK 0001485739 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,823.0302

SEC source: 0001127602-24-009345 · form4.xml · nonDerivative · entry 1

Whipple John F. · CIK 0001485739 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,746.0302

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-008485 · form4.xml · nonDerivative · entry 1

Abdo Michael N · CIK 0001933852 · EVP and General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,133

F1 · kind: Payment of tax liability associated with vesting of restricted stock awards.

SEC source: 0001127602-24-008482 · form4.xml · nonDerivative · entry 1

Gillan-Myer Maureen A · CIK 0001670754 · EVP, Chief Human Resources Off

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,607

F1 · kind: Payment of tax liability associated with vesting of restricted stock awards.

SEC source: 0001127602-24-008469 · form4.xml · nonDerivative · entry 1

Karaivanov Dimitar · CIK 0001866135 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,272

F1 · kind: Payment of tax liability associated with vesting of restricted stock award.

SEC source: 0001127602-24-007657 · form4.xml · derivative · entry 3

ACE BRIAN R · CIK 0001264817 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3,631 shares

Expires 2024-03-19

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-007657 · form4.xml · nonDerivative · entry 1

ACE BRIAN R · CIK 0001264817 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,584.3659

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: Includes 31.3558 shares acquired pursuant to the Community Bank System, Inc. Dividend Reinvestment Plan.

SEC source: 0001127602-24-006519 · form4.xml · derivative · entry 12

Bolus Mark J. · CIK 0001486056 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3,631 shares

Expires 2024-03-19

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-006519 · form4.xml · nonDerivative · entry 2

Bolus Mark J. · CIK 0001486056 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 96,363.602

SEC source: 0001127602-24-006519 · form4.xml · nonDerivative · entry 1

Bolus Mark J. · CIK 0001486056 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 99,994.602

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-004932 · form4.xml · nonDerivative · entry 1

Karaivanov Dimitar · CIK 0001866135 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,265

SEC source: 0001127602-24-002378 · form4.xml · nonDerivative · entry 1

STEELE SALLY A · CIK 0001264816 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,634.3782

SEC source: 0001127602-24-001509 · form4.xml · derivative · entry 3

Fesette Neil E. · CIK 0001485738 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,438.9009

Underlying: Common Stock · 932.3383 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F3 · derivative.exercise_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F3 · derivative.expiration_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F4 · balance_after: Includes 299.2641 units of phantom stock acquired under the Deferred Compensation Plan's dividend reinvestment feature.

SEC source: 0001127602-24-001509 · form4.xml · nonDerivative · entry 1

Fesette Neil E. · CIK 0001485738 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,689.5102

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-000926 · form4.xml · nonDerivative · entry 2

TRYNISKI MARK E · CIK 0001242753 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,395

F1 · kind: Payment of tax liability associated with vesting of stock awards upon the reporting person's retirement as President and Chief Executive Officer.

SEC source: 0001127602-24-000926 · form4.xml · nonDerivative · entry 1

TRYNISKI MARK E · CIK 0001242753 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,101

SEC source: 0001127602-24-000863 · form4.xml · derivative · entry 3

ACE BRIAN R · CIK 0001264817 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3,501.4072 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F3 · shares: Includes 103.8752 units of phantom stock acquired under the Deferred Compensation Plan's dividend reinvestment feature.

F2 · derivative.exercise_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F2 · derivative.expiration_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

SEC source: 0001127602-24-000863 · form4.xml · nonDerivative · entry 1

ACE BRIAN R · CIK 0001264817 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 68,922.0101

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: On January 2, 2024, the reporting person's phantom stock units were settled for an equal number of shares of Community Bank System, Inc. common stock.

SEC source: 0001127602-24-000665 · form4.xml · derivative · entry 3

STEELE SALLY A · CIK 0001264816 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,497.6556

Underlying: Common Stock · 3,501.4341 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F2 · derivative.exercise_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F2 · derivative.expiration_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F3 · balance_after: Includes 201.4451 units of phantom stock acquired under the Deferred Compensation Plan's dividend reinvestment feature.

SEC source: 0001127602-24-000665 · form4.xml · nonDerivative · entry 1

STEELE SALLY A · CIK 0001264816 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,135.3782

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: On January 2, 2024, the reporting person's phantom stock units were settled for an equal number of shares of Community Bank System, Inc. common stock.

SEC source: 0001127602-23-030483 · form4.xml · nonDerivative · entry 1

STEELE SALLY A · CIK 0001264816 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,633.9441

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $52.95 to $53.15, inclusive. The reporting person undertakes to provide Community Bank System, Inc., any security holder of Community Bank System, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001127602-23-030282 · form4.xml · derivative · entry 1

Pecor Raymond C III · CIK 0001475265 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,351.9421

Underlying: Common Stock · 394.7622 shares

Expires not disclosed

F1 · derivative.exercise_price: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F1 · derivative.exercise_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F1 · derivative.expiration_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

SEC source: 0001127602-23-028829 · form4.xml · derivative · entry 2

Whipple John F. · CIK 0001485739 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,607.2548

Underlying: Common Stock · 1,259.403 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: On December 1, 2023, the reporting person's phantom stock units were settled for an equal number of shares of Community Bank System, Inc. common stock.

F2 · derivative.exercise_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F2 · derivative.expiration_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

SEC source: 0001127602-23-028829 · form4.xml · nonDerivative · entry 1

Whipple John F. · CIK 0001485739 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,115.0302

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-23-027565 · form4.xml · derivative · entry 3

STICKELS ERIC · CIK 0001201821 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,204.6592

Underlying: Common Stock · 303.6361 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: 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.

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

SEC source: 0001127602-23-027565 · form4.xml · nonDerivative · entry 1

STICKELS ERIC · CIK 0001201821 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,458.196

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-23-026395 · form4.xml · nonDerivative · entry 1

LEVY JEFFREY M · CIK 0001384972 · President, Commercial Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,924.1393

SEC source: 0001127602-23-024945 · form4.xml · nonDerivative · entry 1

Gillan-Myer Maureen A · CIK 0001670754 · EVP, Chief Human Resources Off

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,825

F1 · kind: Payment of tax liability associated with vesting of restricted stock award.

SEC source: 0001127602-23-024692 · form4.xml · nonDerivative · entry 1

ACE BRIAN R · CIK 0001264817 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,420.6029

SEC source: 0001127602-23-024640 · form4.xml · derivative · entry 1

Pecor Raymond C III · CIK 0001475265 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,957.1799

Underlying: Common Stock · 489.1434 shares

Expires not disclosed

F1 · derivative.exercise_price: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F1 · derivative.exercise_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F1 · derivative.expiration_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

SEC source: 0001127602-23-026226 · form4.xml · nonDerivative · entry 1

Bolus Mark J. · CIK 0001486056 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 96,363.602

SEC source: 0001127602-23-024154 · form4.xml · nonDerivative · entry 1

SUTARIS JOSEPH E · CIK 0001278835 · EVP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By 401(k) Plan

Disclosed balance after: 6,103.9608

SEC source: 0001127602-23-023866 · form4.xml · nonDerivative · entry 1

Karaivanov Dimitar · CIK 0001866135 · EVP, Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,265

SEC source: 0001127602-23-023051 · form4.xml · nonDerivative · entry 1

SUTARIS JOSEPH E · CIK 0001278835 · EVP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By 401(k) Plan

Disclosed balance after: 5,084.2463

F1 · ownership.nature: The number of shares reported herein acquired pursuant to Community Bank System, Inc.'s 401(k) Plan and are based on a current plan statement.

SEC source: 0001127602-23-022941 · form4.xml · nonDerivative · entry 1

Karaivanov Dimitar · CIK 0001866135 · EVP, Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,265

SEC source: 0001127602-23-019226 · form4.xml · derivative · entry 1

Pecor Raymond C III · CIK 0001475265 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,468.0365

Underlying: Common Stock · 417.5154 shares

Expires not disclosed

F1 · derivative.exercise_price: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F1 · derivative.exercise_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F1 · derivative.expiration_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

SEC source: 0001127602-23-019225 · form4.xml · derivative · entry 1

DAVIS JEFFREY L · CIK 0001220435 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,520.6478

Underlying: Common Stock · 216.3951 shares

Expires not disclosed

F1 · derivative.exercise_price: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F1 · derivative.exercise_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F1 · derivative.expiration_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

SEC source: 0001127602-24-004939 · form5.xml · nonDerivative · entry 1

Pecor Raymond C III · CIK 0001475265 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,182.8993

F1 · balance_after: Includes 256.956 shares acquired pursuant to the Community Bank System, Inc. Dividend Reinvestment Plan.

SEC source: 0001127602-23-018958 · form4.xml · derivative · entry 5

DAVIS JEFFREY L · CIK 0001220435 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,971.135

Underlying: Common Stock · 695.4506 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: 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.

F2 · derivative.exercise_date: 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.

F2 · derivative.expiration_date: 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.

SEC source: 0001127602-23-018958 · form4.xml · derivative · entry 4

DAVIS JEFFREY L · CIK 0001220435 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,304.2527

Underlying: Common Stock · 1,217.4306 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F1 · derivative.exercise_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

F1 · derivative.expiration_date: Each unit of phantom stock is the economic equivalent of one share of Community Bank System, Inc. common stock. The units of phantom stock relating to the Deferred Compensation Plan will be settled in Community Bank System, Inc. common stock at future dates selected by the reporting person.

SEC source: 0001127602-23-018958 · form4.xml · nonDerivative · entry 2

DAVIS JEFFREY L · CIK 0001220435 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,428.8812

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-23-018958 · form4.xml · nonDerivative · entry 1

DAVIS JEFFREY L · CIK 0001220435 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,733.4306

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-23-018017 · form4.xml · nonDerivative · entry 1

Karaivanov Dimitar · CIK 0001866135 · EVP, Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,265