| Lastest Insider Transactions Of COMMUNITY FINANCIAL SYSTEM, INC. ( CBU ) |
| Symbol | Company Name | Insider Name | Title | Date | Transation | Share | Price | Amount | File Date |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Hall Brenda M | Directior | 2026-08-24 | Buy | 476 | 63.59 | 30,271 | 2026-08-26 12:07:10 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Bolus Mark J. | Directior | 2026-06-25 | Sell | 12,190 | 67.00 | 816,786 | 2026-06-29 11:13:37 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Durkee Deresa Fischer | SVP, Chief Accounting Officer | 2026-06-10 | Option Exercise | 1,623 | 46.21 | 74,997 | 2026-06-11 16:21:14 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | STICKELS ERIC | Directior | 2026-06-08 | Sell | 2,000 | 63.98 | 127,962 | 2026-06-10 11:33:22 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Pecor Raymond C III | Directior | 2026-04-29 | Option Exercise | 9 | 0.00 | 0 | 2026-05-01 16:28:05 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Parente John | Directior | 2026-04-29 | Option Exercise | 9 | 0.00 | 0 | 2026-05-01 16:22:54 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Knauss Jeffery J | Directior | 2026-04-29 | Option Exercise | 9 | 0.00 | 0 | 2026-05-01 16:21:22 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Pecor Raymond C III | Directior | 2026-03-19 | Option Exercise | 1,254 | 0.00 | 0 | 2026-03-23 11:09:40 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | STEELE SALLY A | Directior | 2026-03-19 | Option Exercise | 1,254 | 0.00 | 0 | 2026-03-23 11:06:54 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Knauss Jeffery J | Directior | 2026-03-19 | Option Exercise | 1,254 | 0.00 | 0 | 2026-03-23 11:05:04 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Parente John | Directior | 2026-03-19 | Option Exercise | 1,254 | 0.00 | 0 | 2026-03-23 10:49:05 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | STICKELS ERIC | Directior | 2026-03-16 | Option Exercise | 250 | 0.00 | 0 | 2026-03-17 15:33:43 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Gillan-Myer Maureen A | EVP, Chief Admin & HR Officer | 2025-12-29 | Sell | 3,450 | 58.86 | 203,054 | 2026-03-04 12:09:56 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Whipple John F. | Directior | 2026-02-04 | Sell | 4,246 | 65.17 | 276,704 | 2026-02-06 10:59:04 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Whipple John F. | Directior | 2026-02-04 | Option Exercise | 4,246 | 38.02 | 161,433 | 2026-02-06 10:59:04 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | STEELE SALLY A | Directior | 2026-02-03 | Sell | 4,000 | 64.12 | 256,480 | 2026-02-05 15:52:09 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | STEELE SALLY A | Directior | 2026-02-03 | Option Exercise | 4,000 | 23.04 | 92,160 | 2026-02-05 15:52:09 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | STICKELS ERIC | Directior | 2026-02-03 | Sell | 2,000 | 64.75 | 129,492 | 2026-02-05 14:45:32 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Abdo Michael N | EVP and General Counsel | 2026-01-30 | Option Exercise | 2,287 | 38.02 | 86,952 | 2026-02-03 16:05:46 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Parente John | Directior | 2025-12-16 | Option Exercise | 4,246 | 38.02 | 161,433 | 2025-12-17 13:55:44 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Whipple John F. | Directior | 2025-12-01 | Option Exercise | 1,370 | 0.00 | 0 | 2025-12-03 11:12:05 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | LEVY JEFFREY M | SVP & Chief Banking Officer | 2025-08-27 | Sell | 1,440 | 61.38 | 88,380 | 2025-08-28 11:27:12 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Knauss Jeffery J | Directior | 2025-04-14 | Option Exercise | 12 | 0.00 | 0 | 2025-04-16 17:30:25 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | STEELE SALLY A | Directior | 2025-04-15 | Option Exercise | 1,181 | 0.00 | 0 | 2025-04-16 17:21:14 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | STICKELS ERIC | Directior | 2025-04-14 | Option Exercise | 3 | 0.00 | 0 | 2025-04-16 16:06:15 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Bolus Mark J. | Directior | 2025-04-14 | Option Exercise | 12 | 0.00 | 0 | 2025-04-16 15:41:14 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Parente John | Directior | 2025-04-14 | Option Exercise | 12 | 0.00 | 0 | 2025-04-16 15:09:45 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Parente John | Directior | 2025-03-18 | Option Exercise | 1,430 | 0.00 | 0 | 2025-03-20 13:28:27 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Knauss Jeffery J | Directior | 2025-03-18 | Option Exercise | 1,430 | 0.00 | 0 | 2025-03-20 12:45:02 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Bolus Mark J. | Directior | 2025-03-18 | Option Exercise | 1,430 | 0.00 | 0 | 2025-03-20 11:34:54 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | STICKELS ERIC | Directior | 2025-03-17 | Option Exercise | 451 | 0.00 | 0 | 2025-03-18 09:53:27 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | LEVY JEFFREY M | SVP & Chief Banking Officer | 2025-01-24 | Sell | 1,136 | 65.98 | 74,953 | 2025-01-28 13:28:51 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Bolus Mark J. | Directior | 2025-01-15 | Option Exercise | 712 | 0.00 | 0 | 2025-01-17 15:44:17 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | STEELE SALLY A | Directior | 2025-01-13 | Option Exercise | 28 | 0.00 | 0 | 2025-01-14 16:45:25 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | STEELE SALLY A | Directior | 2025-01-02 | Option Exercise | 3,663 | 0.00 | 0 | 2025-01-06 14:34:13 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Whipple John F. | Directior | 2024-12-02 | Option Exercise | 1,313 | 0.00 | 0 | 2024-12-03 10:35:26 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Abdo Michael N | EVP and General Counsel | 2024-11-26 | Option Exercise | 2,100 | 0.00 | 0 | 2024-11-27 15:31:13 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | SUTARIS JOSEPH E | EVP & Chief Financial Officer | 2024-11-26 | Option Exercise | 7,647 | 0.00 | 0 | 2024-11-27 13:47:32 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Whipple John F. | Directior | 2024-11-25 | Sell | 3,937 | 73.10 | 287,802 | 2024-11-26 10:42:22 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Whipple John F. | Directior | 2024-11-25 | Option Exercise | 3,937 | 35.36 | 139,212 | 2024-11-26 10:42:22 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Durkee Deresa Fischer | SVP, Chief Accounting Officer | 2024-11-07 | Option Exercise | 2,132 | 48.91 | 104,281 | 2024-11-15 11:16:30 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | MacPherson Kerrie D. | Directior | 2024-11-05 | Buy | 320 | 62.20 | 19,902 | 2024-11-07 16:00:54 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Bolus Mark J. | Directior | 2024-11-06 | Sell | 4,092 | 70.06 | 286,686 | 2024-11-07 15:46:19 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Bolus Mark J. | Directior | 2024-11-06 | Option Exercise | 4,092 | 36.74 | 150,340 | 2024-11-07 15:46:19 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Durkee Deresa Fischer | SVP, Chief Accounting Officer | 2024-11-06 | Option Exercise | 2,132 | 48.91 | 104,281 | 2024-11-07 14:45:37 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | MacPherson Kerrie D. | Directior | 2024-11-05 | Buy | 320 | 62.20 | 19,902 | 2024-11-06 15:25:18 |
| CBU | COMMUNITY FINANCIAL SYSTEM, INC. | Karaivanov Dimitar | President & CEO | 2024-06-13 | Buy | 1,000 | 43.52 | 43,520 | 2024-06-13 17:37:51 |
| CBU | COMMUNITY BANK SYSTEM, INC. | STEELE SALLY A | Directior | 2024-04-12 | Option Exercise | 1,464 | 0.00 | 0 | 2024-04-16 14:45:31 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Parente John | Directior | 2024-03-15 | Option Exercise | 1,198 | 43.68 | 52,328 | 2024-03-19 12:07:22 |
| CBU | COMMUNITY BANK SYSTEM, INC. | STICKELS ERIC | Directior | 2024-03-15 | Option Exercise | 431 | 43.73 | 18,847 | 2024-03-19 12:05:36 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Knauss Jeffery J | Directior | 2024-03-14 | Option Exercise | 1,198 | 45.77 | 54,834 | 2024-03-15 12:29:26 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Fesette Neil E. | Directior | 2024-03-11 | Option Exercise | 3,631 | 37.77 | 137,143 | 2024-03-13 15:16:37 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Abdo Michael N | EVP and General Counsel | 2024-03-07 | Option Exercise | 700 | 37.77 | 26,439 | 2024-03-11 14:19:27 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Whipple John F. | Directior | 2024-03-07 | Option Exercise | 3,631 | 37.77 | 137,143 | 2024-03-11 14:17:46 |
| CBU | COMMUNITY BANK SYSTEM, INC. | ACE BRIAN R | Directior | 2024-02-29 | Option Exercise | 3,631 | 37.77 | 137,143 | 2024-02-29 17:29:43 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Bolus Mark J. | Directior | 2024-02-21 | Sell | 3,631 | 45.00 | 163,395 | 2024-02-23 14:43:59 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Bolus Mark J. | Directior | 2024-02-21 | Option Exercise | 3,631 | 37.77 | 137,143 | 2024-02-23 14:43:59 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Karaivanov Dimitar | President & CEO | 2024-02-14 | Buy | 1,000 | 43.70 | 43,700 | 2024-02-14 12:12:37 |
| CBU | COMMUNITY BANK SYSTEM, INC. | STEELE SALLY A | Directior | 2024-01-29 | Sell | 3,501 | 48.76 | 170,709 | 2024-01-29 14:50:50 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Fesette Neil E. | Directior | 2024-01-16 | Option Exercise | 932 | 0.00 | 0 | 2024-01-18 11:12:24 |
| CBU | COMMUNITY BANK SYSTEM, INC. | ACE BRIAN R | Directior | 2024-01-02 | Option Exercise | 3,501 | 0.00 | 0 | 2024-01-04 17:08:39 |
| CBU | COMMUNITY BANK SYSTEM, INC. | STEELE SALLY A | Directior | 2024-01-02 | Option Exercise | 3,501 | 0.00 | 0 | 2024-01-04 10:02:22 |
| CBU | COMMUNITY BANK SYSTEM, INC. | STEELE SALLY A | Directior | 2023-12-26 | Sell | 9,400 | 53.05 | 498,670 | 2023-12-27 15:55:07 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Whipple John F. | Directior | 2023-12-01 | Option Exercise | 1,259 | 44.37 | 55,867 | 2023-12-05 15:16:18 |
| CBU | COMMUNITY BANK SYSTEM, INC. | STICKELS ERIC | Directior | 2023-11-15 | Option Exercise | 303 | 44.96 | 13,624 | 2023-11-16 16:00:38 |
| CBU | COMMUNITY BANK SYSTEM, INC. | LEVY JEFFREY M | President, Commercial Banking | 2023-10-27 | Buy | 1,300 | 38.60 | 50,186 | 2023-10-31 13:54:13 |
| CBU | COMMUNITY BANK SYSTEM, INC. | ACE BRIAN R | Directior | 2023-09-22 | Buy | 2,410 | 41.37 | 99,702 | 2023-09-25 10:48:05 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Karaivanov Dimitar | EVP, Chief Operating Officer | 2023-09-07 | Buy | 1,000 | 44.50 | 44,500 | 2023-09-07 18:19:14 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Karaivanov Dimitar | EVP, Chief Operating Officer | 2023-08-16 | Buy | 1,000 | 48.50 | 48,500 | 2023-08-18 15:58:16 |
| CBU | COMMUNITY BANK SYSTEM, INC. | DAVIS JEFFREY L | Directior | 2023-06-15 | Option Exercise | 1,912 | 0.00 | 0 | 2023-06-20 15:21:01 |
| CBU | COMMUNITY BANK SYSTEM, INC. | MacPherson Kerrie D. | Directior | 2023-03-20 | Buy | 1,000 | 55.42 | 55,423 | 2023-03-21 16:28:05 |
| CBU | COMMUNITY BANK SYSTEM, INC. | MacPherson Kerrie D. | Directior | 2023-03-20 | Buy | 1,000 | 55.42 | 55,423 | 2023-03-21 14:47:08 |
| CBU | COMMUNITY BANK SYSTEM, INC. | STEELE SALLY A | Directior | 2023-03-15 | Option Exercise | 661 | 0.00 | 0 | 2023-03-17 12:47:17 |
| CBU | COMMUNITY BANK SYSTEM, INC. | STICKELS ERIC | Directior | 2023-03-15 | Option Exercise | 885 | 0.00 | 0 | 2023-03-17 12:25:24 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Parente John | Directior | 2023-03-15 | Buy | 2,000 | 53.20 | 106,400 | 2023-03-17 11:49:38 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Parente John | Directior | 2023-03-14 | Option Exercise | 661 | 0.00 | 0 | 2023-03-16 12:20:56 |
| CBU | COMMUNITY BANK SYSTEM, INC. | STEELE SALLY A | Directior | 2023-03-14 | Buy | 2,000 | 53.46 | 106,923 | 2023-03-16 09:58:05 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Knauss Jeffery J | Directior | 2023-03-14 | Option Exercise | 661 | 0.00 | 0 | 2023-03-15 12:56:51 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Bolus Mark J. | Directior | 2023-03-13 | Sell | 468 | 52.87 | 24,745 | 2023-03-14 18:31:03 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Bolus Mark J. | Directior | 2023-03-13 | Option Exercise | 468 | 29.79 | 13,942 | 2023-03-14 18:31:03 |
| CBU | COMMUNITY BANK SYSTEM, INC. | ACE BRIAN R | Directior | 2023-03-13 | Sell | 483 | 52.57 | 25,393 | 2023-03-14 18:00:11 |
| CBU | COMMUNITY BANK SYSTEM, INC. | ACE BRIAN R | Directior | 2023-03-13 | Option Exercise | 483 | 29.79 | 14,389 | 2023-03-14 18:00:11 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Bolus Mark J. | Directior | 2023-03-01 | Sell | 4,163 | 60.54 | 252,024 | 2023-03-03 16:28:12 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Bolus Mark J. | Directior | 2023-03-01 | Option Exercise | 4,163 | 0.00 | 0 | 2023-03-03 16:28:12 |
| CBU | COMMUNITY BANK SYSTEM, INC. | ACE BRIAN R | Directior | 2022-12-22 | Sell | 4,148 | 60.54 | 251,120 | 2023-03-03 16:05:38 |
| CBU | COMMUNITY BANK SYSTEM, INC. | ACE BRIAN R | Directior | 2022-12-22 | Option Exercise | 4,148 | 29.79 | 123,569 | 2023-03-03 16:05:38 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Fesette Neil E. | Directior | 2023-01-17 | Option Exercise | 633 | 0.00 | 0 | 2023-01-19 17:57:10 |
| CBU | COMMUNITY BANK SYSTEM, INC. | DAVIS JEFFREY L | Directior | 2023-01-03 | Option Exercise | 7,521 | 0.00 | 0 | 2023-01-05 12:15:14 |
| CBU | COMMUNITY BANK SYSTEM, INC. | ACE BRIAN R | Directior | 2023-01-03 | Option Exercise | 3,354 | 0.00 | 0 | 2023-01-04 14:57:47 |
| CBU | COMMUNITY BANK SYSTEM, INC. | STEELE SALLY A | Directior | 2023-01-03 | Option Exercise | 3,366 | 0.00 | 0 | 2023-01-04 13:37:14 |
| CBU | COMMUNITY BANK SYSTEM, INC. | Bolus Mark J. | Directior | 2022-12-15 | Option Exercise | 590 | 59.84 | 35,303 | 2022-12-19 15:30:59 |
