Mark J. Bolus

Insider

First SEC filing: March 19, 2026 · Latest: March 19, 2026

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Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.

Insider at

CBU selling June 25, 2026

Insider transactions

0 buys (P) 1 sells (S) Net: $-816,797 + 90 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

90 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 25, 2026	CBU	S	12,191	$67.00	$816,797	94,060 Direct	-11.47%	Disposed	-6.6% (price as of 2026-08-20)
March 17, 2026	CBU	A	1,220	—	—	3,758 Direct	+48.07%	Acquired	(price as of 2026-08-20)
April 14, 2025	CBU	M	12	—	—	2,479 Direct	-0.48%	Disposed	(price as of 2026-08-20)
April 14, 2025	CBU	M	12	—	—	103,828 Direct	+0.01%	Acquired	(price as of 2026-08-20)
March 19, 2025	CBU	M	1,430	—	—	2,467 Direct	-36.69%	Disposed	(price as of 2026-08-20)
March 19, 2025	CBU	M	1,430	—	—	103,816 Direct	+1.40%	Acquired	(price as of 2026-08-20)
March 18, 2025	CBU	A	1,225	—	—	3,898 Direct	+45.83%	Acquired	(price as of 2026-08-20)
Jan. 15, 2025	CBU	M	712	—	—	2,673 Direct	-21.03%	Disposed	(price as of 2026-08-20)
Jan. 15, 2025	CBU	M	712	—	—	101,769 Direct	+0.70%	Acquired	(price as of 2026-08-20)
Nov. 6, 2024	CBU	M	1,969	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 6, 2024	CBU	M	2,123	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 6, 2024	CBU	S	1,900	$70.66	$134,254	98,928 Direct	-1.88%	Disposed	-11.5% (price as of 2026-08-20)
Nov. 6, 2024	CBU	S	2,192	$69.54	$152,432	100,828 Direct	-2.13%	Disposed	-10.0% (price as of 2026-08-20)
Nov. 6, 2024	CBU	M	1,969	$35.36	$69,624	103,020 Direct	+1.95%	Acquired	76.9% (price as of 2026-08-20)
Nov. 6, 2024	CBU	M	2,123	$38.02	$80,716	101,051 Direct	+2.15%	Acquired	64.5% (price as of 2026-08-20)
March 19, 2024	CBU	A	1,395	—	—	3,282 Direct	+73.93%	Acquired	(price as of 2026-08-20)
Feb. 21, 2024	CBU	S	3,631	$45.00	$163,395	96,364 Direct	-3.63%	Disposed	39.0% (price as of 2026-08-20)
Feb. 21, 2024	CBU	M	3,631	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 21, 2024	CBU	M	3,631	$37.77	$137,143	99,995 Direct	+3.77%	Acquired	65.6% (price as of 2026-08-20)
Sept. 21, 2023	CBU	W	11,211	—	—	96,364 Direct	+13.17%	Acquired	(price as of 2026-08-20)
March 14, 2023	CBU	A	1,154	—	—	1,816 Direct	+174.32%	Acquired	(price as of 2026-08-20)
March 13, 2023	CBU	M	468	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 13, 2023	CBU	S	468	$52.87	$24,743	85,153 Direct	-0.55%	Disposed	18.3% (price as of 2026-08-20)
March 13, 2023	CBU	M	468	$29.79	$13,942	85,621 Direct	+0.55%	Acquired	110.0% (price as of 2026-08-20)
March 1, 2023	CBU	M	4,163	—	—	468 Direct	-89.89%	Disposed	(price as of 2026-08-20)
March 1, 2023	CBU	S	4,163	$60.54	$252,028	85,153 Direct	-4.66%	Disposed	3.3% (price as of 2026-08-20)
March 1, 2023	CBU	M	4,163	—	—	89,316 Direct	+4.89%	Acquired	(price as of 2026-08-20)
Dec. 15, 2022	CBU	M	591	—	—	633 Direct	-48.28%	Disposed	(price as of 2026-08-20)
Dec. 15, 2022	CBU	M	591	$59.77	$35,324	83,465 Direct	+0.71%	Acquired	4.7% (price as of 2026-08-20)
March 15, 2022	CBU	A	644	—	—	1,223 Direct	+111.23%	Acquired	(price as of 2026-08-20)
Dec. 15, 2021	CBU	M	899	—	—	576 Direct	-60.95%	Disposed	(price as of 2026-08-20)
Dec. 15, 2021	CBU	M	899	$73.32	$65,915	81,126 Direct	+1.12%	Acquired	-14.7% (price as of 2026-08-20)
March 16, 2021	CBU	A	569	—	—	1,454 Direct	+64.29%	Acquired	(price as of 2026-08-20)
Feb. 26, 2021	CBU	M	4,566	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 26, 2021	CBU	S	4,566	$72.02	$328,843	80,227 Direct	-5.38%	Disposed	-13.1% (price as of 2026-08-20)
Feb. 26, 2021	CBU	M	4,566	$28.78	$131,409	84,793 Direct	+5.69%	Acquired	117.4% (price as of 2026-08-20)
Dec. 15, 2020	CBU	M	622	—	—	852 Direct	-42.20%	Disposed	(price as of 2026-08-20)
Dec. 15, 2020	CBU	M	622	$65.65	$40,834	78,633 Direct	+0.80%	Acquired	-4.7% (price as of 2026-08-20)
Oct. 30, 2020	CBU	M	2,640	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Oct. 30, 2020	CBU	S	2,640	$57.78	$152,539	78,010 Direct	-3.27%	Disposed	8.3% (price as of 2026-08-20)
Oct. 30, 2020	CBU	M	2,640	$27.36	$72,230	80,650 Direct	+3.38%	Acquired	128.7% (price as of 2026-08-20)
Oct. 28, 2020	CBU	A	172	—	—	1,474 Direct	+13.21%	Acquired	(price as of 2026-08-20)
Sept. 30, 2020	CBU	M	1,210	$27.36	$33,106	79,220 Direct	+1.55%	Acquired	128.7% (price as of 2026-08-20)
Sept. 30, 2020	CBU	S	1,210	$55.00	$66,550	78,010 Direct	-1.53%	Disposed	13.7% (price as of 2026-08-20)
Sept. 30, 2020	CBU	M	1,210	—	—	2,640 Direct	-31.43%	Disposed	(price as of 2026-08-20)
March 17, 2020	CBU	A	667	—	—	1,302 Direct	+105.04%	Acquired	(price as of 2026-08-20)
Jan. 15, 2020	CBU	M	4,892	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 15, 2020	CBU	M	1,550	—	—	635 Direct	-70.94%	Disposed	(price as of 2026-08-20)
Jan. 15, 2020	CBU	M	4,892	—	—	76,590 Direct	+6.82%	Acquired	(price as of 2026-08-20)
Jan. 15, 2020	CBU	M	1,550	—	—	71,698 Direct	+2.21%	Acquired	(price as of 2026-08-20)
March 20, 2019	CBU	A	576	—	—	2,136 Direct	+36.92%	Acquired	(price as of 2026-08-20)
Dec. 20, 2018	CBU	A	312	$55.65	$17,363	4,722 Direct	+7.07%	Acquired	12.4% (price as of 2026-08-20)
Sept. 20, 2018	CBU	A	274	$63.50	$17,399	4,409 Direct	+6.63%	Acquired	-1.5% (price as of 2026-08-20)
June 28, 2018	CBU	A	292	$59.55	$17,389	4,115 Direct	+7.64%	Acquired	5.1% (price as of 2026-08-20)
June 27, 2018	CBU	S	3,693	$60.38	$222,983	66,759 Direct	-5.24%	Disposed	3.6% (price as of 2026-08-20)
March 22, 2018	CBU	A	320	$54.34	$17,389	1,031 Direct	+45.01%	Acquired	15.1% (price as of 2026-08-20)
March 20, 2018	CBU	M	566	—	—	2,917 Direct	-16.25%	Disposed	(price as of 2026-08-20)
March 20, 2018	CBU	M	566	—	—	71,018 Direct	+0.80%	Acquired	(price as of 2026-08-20)
March 20, 2018	CBU	M	584	—	—	711 Direct	-45.10%	Disposed	(price as of 2026-08-20)
March 20, 2018	CBU	A	611	—	—	2,027 Direct	+43.15%	Acquired	(price as of 2026-08-20)
March 20, 2018	CBU	M	584	—	—	73,224 Direct	+0.80%	Acquired	(price as of 2026-08-20)
Jan. 15, 2018	CBU	M	1,224	—	—	3,484 Direct	-26.00%	Disposed	(price as of 2026-08-20)
Jan. 15, 2018	CBU	M	1,224	—	—	70,452 Direct	+1.77%	Acquired	(price as of 2026-08-20)
Jan. 15, 2018	CBU	M	1,184	—	—	1,258 Direct	-48.48%	Disposed	(price as of 2026-08-20)
Jan. 15, 2018	CBU	M	1,184	—	—	72,641 Direct	+1.66%	Acquired	(price as of 2026-08-20)
Dec. 21, 2017	CBU	A	277	$55.15	$15,277	2,443 Direct	+12.79%	Acquired	13.4% (price as of 2026-08-20)
Sept. 27, 2017	CBU	A	280	$54.53	$15,268	2,166 Direct	+14.85%	Acquired	14.7% (price as of 2026-08-20)
June 28, 2017	CBU	A	274	$55.64	$15,245	1,869 Direct	+17.18%	Acquired	12.4% (price as of 2026-08-20)
March 22, 2017	CBU	A	290	$52.67	$15,274	1,579 Direct	+22.50%	Acquired	18.8% (price as of 2026-08-20)
March 15, 2017	CBU	A	553	—	—	1,416 Direct	+64.08%	Acquired	(price as of 2026-08-20)
Jan. 2, 2017	CBU	M	3,694	—	—	3,476 Direct	-51.52%	Disposed	(price as of 2026-08-20)
Jan. 2, 2017	CBU	M	3,694	—	—	67,449 Direct	+5.79%	Acquired	(price as of 2026-08-20)
Jan. 2, 2017	CBU	M	5,922	—	—	1,248 Direct	-82.59%	Disposed	(price as of 2026-08-20)
Jan. 2, 2017	CBU	M	5,922	—	—	69,678 Direct	+9.29%	Acquired	(price as of 2026-08-20)
Dec. 22, 2016	CBU	A	273	$61.45	$16,776	7,170 Direct	+3.96%	Acquired	1.8% (price as of 2026-08-20)
Sept. 21, 2016	CBU	A	355	$47.16	$16,742	6,849 Direct	+5.47%	Acquired	32.7% (price as of 2026-08-20)
July 5, 2016	CBU	A	419	$39.96	$16,743	6,443 Direct	+6.96%	Acquired	56.6% (price as of 2026-08-20)
March 17, 2016	CBU	A	431	$38.82	$16,731	5,974 Direct	+7.78%	Acquired	61.2% (price as of 2026-08-20)
March 16, 2016	CBU	A	2,123	—	—	2,123 Direct	—	Acquired	(price as of 2026-08-20)
March 16, 2016	CBU	A	438	—	—	863 Direct	+103.06%	Acquired	(price as of 2026-08-20)
Dec. 21, 2015	CBU	A	386	$40.16	$15,502	5,497 Direct	+7.55%	Acquired	55.8% (price as of 2026-08-20)
Sept. 21, 2015	CBU	A	432	$35.90	$15,509	5,071 Direct	+9.31%	Acquired	74.3% (price as of 2026-08-20)
June 22, 2015	CBU	A	413	$37.57	$15,516	838 Direct	+97.18%	Acquired	66.5% (price as of 2026-08-20)
March 19, 2015	CBU	A	437	$35.50	$15,514	4,159 Direct	+11.74%	Acquired	76.2% (price as of 2026-08-20)
March 18, 2015	CBU	A	425	—	—	425 Direct	—	Acquired	(price as of 2026-08-20)
March 18, 2015	CBU	A	1,969	—	—	1,969 Direct	—	Acquired	(price as of 2026-08-20)
Dec. 19, 2014	CBU	A	290	$37.98	$11,014	3,694 Direct	+8.52%	Acquired	64.7% (price as of 2026-08-20)
Nov. 25, 2014	CBU	A	60	$37.65	$2,259	3,404 Direct	+1.79%	Acquired	66.2% (price as of 2026-08-20)
Oct. 23, 2014	CBU	A	99	$35.22	$3,487	3,344 Direct	+3.05%	Acquired	77.6% (price as of 2026-08-20)
Sept. 24, 2014	CBU	A	291	$34.34	$9,993	3,219 Direct	+9.94%	Acquired	82.2% (price as of 2026-08-20)
Aug. 27, 2014	CBU	A	70	$35.66	$2,496	2,927 Direct	+2.45%	Acquired	75.4% (price as of 2026-08-20)
July 17, 2014	CBU	A	101	$34.63	$3,498	2,857 Direct	+3.66%	Acquired	80.7% (price as of 2026-08-20)
June 25, 2014	CBU	A	207	$36.18	$7,489	2,736 Direct	+8.19%	Acquired	72.9% (price as of 2026-08-20)
May 15, 2014	CBU	A	99	$35.51	$3,515	2,529 Direct	+4.07%	Acquired	76.2% (price as of 2026-08-20)
March 20, 2014	CBU	A	306	$39.20	$11,995	2,415 Direct	+14.51%	Acquired	59.6% (price as of 2026-08-20)
March 19, 2014	CBU	A	3,631	—	—	3,631 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 22, 2014	CBU	A	123	$38.77	$4,769	2,109 Direct	+6.19%	Acquired	61.4% (price as of 2026-08-20)
Dec. 19, 2013	CBU	A	344	$38.52	$13,251	1,975 Direct	+21.09%	Acquired	62.4% (price as of 2026-08-20)
Oct. 18, 2013	CBU	A	97	$36.03	$3,495	1,631 Direct	+6.32%	Acquired	73.6% (price as of 2026-08-20)
Sept. 25, 2013	CBU	A	355	$33.76	$11,985	1,524 Direct	+30.37%	Acquired	85.3% (price as of 2026-08-20)

Showing latest 100 of 140 transactions

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.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
March 17, 2026	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (1,220)	—	—	1,220	Acquired
April 14, 2025	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (12)	—	—	12	Disposed
March 19, 2025	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (1,430)	—	—	1,430	Disposed
March 18, 2025	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (1,225)	—	—	1,225	Acquired
Jan. 15, 2025	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (712)	—	—	712	Disposed
Nov. 6, 2024	CBU	Stock Option	Common Stock (1,969)	$35.36	March 18, 2025	1,969	Disposed
Nov. 6, 2024	CBU	Stock Option	Common Stock (2,123)	$38.02	March 16, 2026	2,123	Disposed
March 19, 2024	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (1,395)	—	—	1,395	Acquired
Feb. 21, 2024	CBU	Stock Option	Common Stock (3,631)	$37.77	March 19, 2024	3,631	Disposed
March 14, 2023	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (1,154)	—	—	1,154	Acquired
March 13, 2023	CBU	Stock Option	Common Stock (468)	$29.79	March 19, 2023	468	Disposed
March 1, 2023	CBU	Stock Option	Common Stock (4,163)	$29.79	March 19, 2023	4,163	Disposed
Dec. 15, 2022	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (591)	—	—	591	Disposed
March 15, 2022	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (644)	—	—	644	Acquired
Dec. 15, 2021	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (899)	—	—	899	Disposed
March 16, 2021	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (569)	—	—	569	Acquired
Feb. 26, 2021	CBU	Stock Option	Common Stock (4,566)	$28.78	March 21, 2022	4,566	Disposed
Dec. 15, 2020	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (622)	—	—	622	Disposed
Oct. 30, 2020	CBU	Stock Option	Common Stock (2,640)	$27.36	Jan. 19, 2021	2,640	Disposed
Oct. 28, 2020	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (172)	—	—	172	Acquired
Sept. 30, 2020	CBU	Stock Option	Common Stock (1,210)	$27.36	Jan. 19, 2021	1,210	Disposed
March 17, 2020	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (667)	—	—	667	Acquired
Jan. 15, 2020	CBU	Phantom Stock (Deferred Compensation)	Common Stock	—	—	4,892	Disposed
Jan. 15, 2020	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (1,550)	—	—	1,550	Disposed
March 20, 2019	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (576)	—	—	576	Acquired
Dec. 20, 2018	CBU	Phantom Stock (Deferred Compensation)	Common Stock (312)	—	—	312	Acquired
Sept. 20, 2018	CBU	Phantom Stock (Deferred Compensation)	Common Stock (274)	—	—	274	Acquired
June 28, 2018	CBU	Phantom Stock (Deferred Compensation)	Common Stock (292)	—	—	292	Acquired
March 22, 2018	CBU	Phantom Stock (Deferred Compensation)	Common Stock (320)	—	—	320	Acquired
March 20, 2018	CBU	Phantom Stock (Deferred Compensation)	Common Stock (566)	—	—	566	Disposed
March 20, 2018	CBU	Phantom Stock (Deferred Compensation)	Common Stock (584)	—	—	584	Disposed
March 20, 2018	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (611)	—	—	611	Acquired
Jan. 15, 2018	CBU	Phantom Stock (Deferred Compensation)	Common Stock (1,224)	—	—	1,224	Disposed
Jan. 15, 2018	CBU	Phantom Stock (Deferred Compensation)	Common Stock (1,184)	—	—	1,184	Disposed
Dec. 21, 2017	CBU	Phantom Stock (Deferred Compensation)	Common Stock (277)	—	—	277	Acquired
Sept. 27, 2017	CBU	Phantom Stock (Deferred Compensation)	Common Stock (280)	—	—	280	Acquired
June 28, 2017	CBU	Phantom Stock (Deferred Compensation)	Common Stock (274)	—	—	274	Acquired
March 22, 2017	CBU	Phantom Stock (Deferred Compensation)	Common Stock (290)	—	—	290	Acquired
March 15, 2017	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (553)	—	—	553	Acquired
Jan. 2, 2017	CBU	Phantom Stock (Deferred Compensation)	Common Stock (3,694)	—	—	3,694	Disposed
Jan. 2, 2017	CBU	Phantom Stock (Deferred Compensation)	Common Stock (5,922)	—	—	5,922	Disposed
Dec. 22, 2016	CBU	Phantom Stock (Deferred Compensation)	Common Stock (273)	—	—	273	Acquired
Sept. 21, 2016	CBU	Phantom Stock (Deferred Compensation)	Common Stock (355)	—	—	355	Acquired
July 5, 2016	CBU	Phantom Stock (Deferred Compensation)	Common Stock (419)	—	—	419	Acquired
March 17, 2016	CBU	Phantom Stock (Deferred Compensation)	Common Stock (431)	—	—	431	Acquired
March 16, 2016	CBU	Stock Option	Common Stock (2,123)	$38.02	March 16, 2026	2,123	Acquired
March 16, 2016	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (438)	—	—	438	Acquired
Dec. 21, 2015	CBU	Phantom Stock (Deferred Compensation)	Common Stock (386)	—	—	386	Acquired
Sept. 21, 2015	CBU	Phantom Stock (Deferred Compensation)	Common Stock (432)	—	—	432	Acquired
June 22, 2015	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (413)	—	—	413	Acquired
March 19, 2015	CBU	Phantom Stock (Deferred Compensation)	Common Stock (437)	—	—	437	Acquired
March 18, 2015	CBU	Phantom Stock (Deferred Stock Units)	Common Stock (425)	—	—	425	Acquired
March 18, 2015	CBU	Stock Option	Common Stock (1,969)	$35.36	March 18, 2025	1,969	Acquired
Dec. 19, 2014	CBU	Phantom Stock (Deferred Compensation)	Common Stock (290)	—	—	290	Acquired
Nov. 25, 2014	CBU	Phantom Stock (Deferred Compensation)	Common Stock (60)	—	—	60	Acquired
Oct. 23, 2014	CBU	Phantom Stock (Deferred Compensation)	Common Stock (99)	—	—	99	Acquired
Sept. 24, 2014	CBU	Phantom Stock (Deferred Compensation)	Common Stock (291)	—	—	291	Acquired
Aug. 27, 2014	CBU	Phantom Stock (Deferred Compensation)	Common Stock (70)	—	—	70	Acquired
July 17, 2014	CBU	Phantom Stock (Deferred Compensation)	Common Stock (101)	—	—	101	Acquired
June 25, 2014	CBU	Phantom Stock (Deferred Compensation)	Common Stock (207)	—	—	207	Acquired
May 15, 2014	CBU	Phantom Stock (Deferred Compensation)	Common Stock (99)	—	—	99	Acquired
March 20, 2014	CBU	Phantom Stock (Deferred Compensation)	Common Stock (306)	—	—	306	Acquired
March 19, 2014	CBU	Stock Option	Common Stock (3,631)	$37.77	March 19, 2024	3,631	Acquired
Jan. 22, 2014	CBU	Phantom Stock (Deferred Compensation)	Common Stock (123)	—	—	123	Acquired
Dec. 19, 2013	CBU	Phantom Stock (Deferred Compensation)	Common Stock (344)	—	—	344	Acquired
Oct. 18, 2013	CBU	Phantom Stock (Deferred Compensation)	Common Stock (97)	—	—	97	Acquired
Sept. 25, 2013	CBU	Phantom Stock (Deferred Compensation)	Common Stock (355)	—	—	355	Acquired
Aug. 29, 2013	CBU	Phantom Stock (Deferred Compensation)	Common Stock (66)	—	—	66	Acquired
Aug. 29, 2013	CBU	Phantom Stock (Deferred Compensation)	Common Stock (2,250)	—	—	2,250	Acquired
July 18, 2013	CBU	Phantom Stock (Deferred Compensation)	Common Stock (106)	—	—	106	Acquired
June 21, 2013	CBU	Phantom Stock (Deferred Compensation)	Common Stock (321)	—	—	321	Acquired
May 13, 2013	CBU	Phantom Stock (Deferred Compensation)	Common Stock (86)	—	—	86	Acquired
March 20, 2013	CBU	Phantom Stock (Deferred Compensation)	Common Stock (276)	—	—	276	Acquired
March 19, 2013	CBU	Stock Option	Common Stock (4,631)	$29.79	March 19, 2023	4,631	Acquired
Jan. 17, 2013	CBU	Phantom Stock (Deferred Compensation)	Common Stock (265)	—	—	265	Acquired
Dec. 29, 2012	CBU	Phantom Stock (Deferred Compensation)	Common Stock (4,566)	—	—	4,566	Disposed
Dec. 19, 2012	CBU	Phantom Stock (Deferred Compensation)	Common Stock (402)	—	—	402	Acquired
Nov. 26, 2012	CBU	Phantom Stock (Deferred Compensation)	Common Stock (37)	—	—	37	Acquired
Oct. 18, 2012	CBU	Phantom Stock (Deferred Compensation)	Common Stock (92)	—	—	92	Acquired
Sept. 27, 2012	CBU	Phantom Stock (Deferred Compensation)	Common Stock (463)	—	—	463	Acquired
Aug. 30, 2012	CBU	Phantom Stock (Deferred Compensation)	Common Stock (124)	—	—	124	Acquired
July 20, 2012	CBU	Phantom Stock (Deferred Compensation)	Common Stock (130)	—	—	130	Acquired
June 21, 2012	CBU	Phantom Stock (Deferred Compensation)	Common Stock (322)	—	—	322	Acquired
May 18, 2012	CBU	Phantom Stock (Deferred Compensation)	Common Stock (95)	—	—	95	Acquired
March 21, 2012	CBU	Stock Option	Common Stock (4,566)	$28.78	March 21, 2022	4,566	Acquired
March 21, 2012	CBU	Phantom Stock (Deferred Compensation)	Common Stock (417)	—	—	417	Acquired
Jan. 24, 2012	CBU	Phantom Stock (Deferred Compensation)	Common Stock (124)	—	—	124	Acquired
Dec. 23, 2011	CBU	Phantom Stock (Deferred Compensation)	Common Stock (429)	—	—	429	Acquired
Oct. 24, 2011	CBU	Phantom Stock (Deferred Compensation)	Common Stock (172)	—	—	172	Acquired
Sept. 26, 2011	CBU	Phantom Stock (Deferred Compensation)	Common Stock (515)	—	—	515	Acquired
July 25, 2011	CBU	Phantom Stock (Deferred Compensation)	Common Stock (141)	—	—	141	Acquired
June 27, 2011	CBU	Phantom Stock (Deferred Compensation)	Common Stock (255)	—	—	255	Acquired
May 27, 2011	CBU	Phantom Stock (Deferred Compensation)	Common Stock (142)	—	—	142	Acquired
March 22, 2011	CBU	Phantom Stock (Deferred Compensation)	Common Stock (405)	—	—	405	Acquired
Jan. 19, 2011	CBU	Phantom Stock (Deferred Compensation)	Common Stock (164)	—	—	164	Acquired
Jan. 19, 2011	CBU	Stock Option	Common Stock (3,850)	$27.36	Jan. 19, 2021	3,850	Acquired
Jan. 6, 2011	CBU	Phantom Stock (Deferred Compensation)	Common Stock	—	—	2,070	Disposed
Dec. 20, 2010	CBU	Phantom Stock (Deferred Compensation)	Common Stock (353)	—	—	353	Acquired
Oct. 25, 2010	CBU	Phantom Stock (Deferred Compensation)	Common Stock (151)	—	—	151	Acquired
Sept. 24, 2010	CBU	Phantom Stock (Deferred Compensation)	Common Stock (369)	—	—	369	Acquired

Showing latest 100 of 104 transactions

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

Initial ownership (Form 3) 7 holdings

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

Date	Ticker	Security	Shares	Ownership
March 5, 2010	CBU	Common Stock	44,515	Direct
March 5, 2010	CBU	Common Stock	5,000	Indirect
March 5, 2010	CBU	Common Stock	152	Indirect
March 5, 2010	CBU	Common Stock	152	Indirect
March 5, 2010	CBU	Common Stock	152	Indirect
March 5, 2010	CBU	Common Stock	152	Indirect
March 5, 2010	CBU	Phantom Stock (Deferred Compensation)→ Common Stock (200)	200	Direct