Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 62 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

62 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
March 15, 2023 CBU P 2,000 $53.20 $106,400 67,188 Direct +3.07% Acquired 14.1% (price as of 2026-10-02)
March 10, 2021 CBU S 7,568 $79.36 $600,596 63,947 Direct -10.58% Disposed -23.5% (price as of 2026-10-02)
Nov. 9, 2020 CBU S 4,631 $66.83 $309,490 63,947 Direct -6.75% Disposed -9.2% (price as of 2026-10-02)
Nov. 9, 2020 CBU S 4,566 $63.01 $287,704 63,947 Direct -6.66% Disposed -3.7% (price as of 2026-10-02)
Jan. 26, 2017 CBU S 5,000 $61.56 $307,800 17,336 Indirect -22.39% Disposed -1.4% (price as of 2026-10-02)
Dec. 8, 2016 CBU S 3,566 $60.89 $217,134 20,000 Indirect -15.13% Disposed -0.3% (price as of 2026-10-02)
Jan. 21, 2016 CBU P 8,600 $35.10 $301,860 63,947 Direct +15.54% Acquired 72.9% (price as of 2026-10-02)
Oct. 25, 2013 CBU S 3,850 $36.72 $141,372 53,283 Direct -6.74% Disposed 65.3% (price as of 2026-10-02)
Jan. 30, 2012 CBU P 7,500 $27.00 $202,500 48,033 Direct +18.50% Acquired 124.8% (price as of 2026-10-02)
Aug. 2, 2011 CBU P 11,000 $25.12 $276,320 40,533 Direct +37.25% Acquired 141.6% (price as of 2026-10-02)
May 21, 2010 CBU P 2,600 $21.80 $56,680 29,533 Direct +9.65% Acquired 178.4% (price as of 2026-10-02)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
April 29, 2026 CBU Phantom Stock (Deferred Stock Units) Common Stock (9) · · 9 Disposed
March 19, 2026 CBU Phantom Stock (Deferred Stock Units) Common Stock (1,254) · · 1,254 Disposed
March 17, 2026 CBU Phantom Stock (Deferred Stock Units) Common Stock (1,220) $0.00 · 1,220 Acquired
Dec. 16, 2025 CBU Stock Option Common Stock (4,246) $38.02 March 16, 2026 4,246 Disposed
April 14, 2025 CBU Phantom Stock (Deferred Stock Units) Common Stock (12) $0.00 · 12 Disposed
March 19, 2025 CBU Phantom Stock (Deferred Stock Units) Common Stock (1,430) $0.00 · 1,430 Disposed
March 18, 2025 CBU Phantom Stock (Deferred Stock Units) Common Stock (1,225) $0.00 · 1,225 Acquired
March 19, 2024 CBU Phantom Stock (Deferred Stock Units) Common Stock (1,395) $0.00 · 1,395 Acquired
March 15, 2024 CBU Phantom Stock (Deferred Stock Units) Common Stock (1,199) $0.00 · 1,199 Disposed
March 15, 2023 CBU Phantom Stock (Deferred Stock Units) Common Stock (662) $0.00 · 662 Disposed
March 14, 2023 CBU Phantom Stock (Deferred Stock Units) Common Stock (1,154) $0.00 · 1,154 Acquired
March 15, 2022 CBU Phantom Stock (Deferred Stock Units) Common Stock (579) $0.00 · 579 Disposed
March 15, 2022 CBU Phantom Stock (Deferred Stock Units) Common Stock (644) $0.00 · 644 Acquired
March 16, 2021 CBU Phantom Stock (Deferred Stock Units) Common Stock (569) $0.00 · 569 Acquired
March 10, 2021 CBU Stock Option Common Stock (3,937) $35.36 March 18, 2025 3,937 Disposed
March 10, 2021 CBU Stock Option Common Stock (3,631) $37.77 March 19, 2024 3,631 Disposed
Nov. 9, 2020 CBU Stock Option Common Stock (4,631) $29.79 March 19, 2023 4,631 Disposed
Nov. 9, 2020 CBU Stock Option Common Stock (4,566) $28.78 March 21, 2022 4,566 Disposed
Oct. 28, 2020 CBU Stock Option Common Stock (796) $58.12 Oct. 28, 2030 796 Acquired
March 17, 2020 CBU Stock Option Common Stock (3,171) $51.64 March 17, 2030 3,171 Acquired
March 20, 2019 CBU Stock Option Common Stock (2,388) $59.41 March 20, 2029 2,388 Acquired
March 20, 2018 CBU Stock Option Common Stock (2,559) $55.92 March 20, 2028 2,559 Acquired
March 15, 2017 CBU Stock Option Common Stock (2,478) $57.12 March 15, 2027 2,478 Acquired
March 16, 2016 CBU Stock Option Common Stock (4,246) $38.02 March 16, 2026 4,246 Acquired
March 18, 2015 CBU Stock Option Common Stock (3,937) $35.36 March 18, 2025 3,937 Acquired
Jan. 1, 2015 CBU Phantom Stock (Deferred Compensation) Common Stock (2,389) · · 2,389 Disposed
March 19, 2014 CBU Stock Option Common Stock (3,631) $37.77 March 19, 2024 3,631 Acquired
Oct. 25, 2013 CBU Stock Option Common Stock (3,850) $27.36 Jan. 19, 2021 3,850 Disposed
March 19, 2013 CBU Stock Option Common Stock (4,631) $29.79 March 19, 2023 4,631 Acquired
April 10, 2012 CBU Phantom Stock (Deferred Compensation) Common Stock (20) · · 20 Acquired
March 21, 2012 CBU Stock Option Common Stock (4,566) $28.78 March 21, 2022 4,566 Acquired
Jan. 10, 2012 CBU Phantom Stock (Deferred Compensation) Common Stock (20) · · 20 Acquired
Oct. 7, 2011 CBU Phantom Stock (Deferred Compensation) Common Stock (24) · · 24 Acquired
July 11, 2011 CBU Phantom Stock (Deferred Compensation) Common Stock (20) · · 20 Acquired
April 11, 2011 CBU Phantom Stock (Deferred Compensation) Common Stock (20) · · 20 Acquired
Jan. 19, 2011 CBU Stock Option Common Stock (3,850) $27.36 Jan. 19, 2021 3,850 Acquired
Jan. 10, 2011 CBU Phantom Stock (Deferred Compensation) Common Stock (16) · · 16 Acquired
Dec. 20, 2010 CBU Phantom Stock (Deferred Compensation) Common Stock (316) · · 316 Acquired
Oct. 25, 2010 CBU Phantom Stock (Deferred Compensation) Common Stock (194) · · 194 Acquired
Sept. 24, 2010 CBU Phantom Stock (Deferred Compensation) Common Stock (369) · · 369 Acquired
July 22, 2010 CBU Phantom Stock (Deferred Compensation) Common Stock (190) · · 190 Acquired
June 25, 2010 CBU Phantom Stock (Deferred Compensation) Common Stock (270) · · 270 Acquired
May 7, 2010 CBU Phantom Stock (Deferred Compensation) Common Stock (201) · · 201 Acquired
March 25, 2010 CBU Phantom Stock (Deferred Compensation) Common Stock (318) · · 318 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 5 holdings

07

Securities held when first becoming an insider, per SEC Form 3.

DateTickerSecuritySharesOwnership
March 5, 2010 CBU Common Stock 26,933 Direct
March 5, 2010 CBU Common Stock 18,000 Indirect
March 5, 2010 CBU Common Stock 15,500 Indirect
March 5, 2010 CBU Common Stock 19,000 Indirect
March 5, 2010 CBU Phantom Stock (Deferred Compensation)→ Common Stock (194) 194 Direct