| SC 13G/A | 2020-02-04 | BlackRock Inc. | COMMUNITY BANK SYSTEM, INC. | 7,274,216 | 14.0% | EDGAR |
| SC 13G | 2019-02-13 | STATE STREET CORP | COMMUNITY BANK SYSTEM, INC. | - | 7.8% | EDGAR |
| SC 13G/A | 2019-02-11 | VANGUARD GROUP INC | COMMUNITY BANK SYSTEM, INC. | 5,828,356 | 11.4% | EDGAR |
| SC 13G/A | 2019-01-24 | BlackRock Inc. | COMMUNITY BANK SYSTEM, INC. | 7,522,989 | 14.7% | EDGAR |
| SC 13G/A | 2018-02-15 | Neuberger Berman Group LLC | COMMUNITY BANK SYSTEM, INC. | 2,163,303 | 4.3% | EDGAR |
| SC 13G | 2018-02-14 | STATE STREET CORP | COMMUNITY BANK SYSTEM, INC. | - | 6.8% | EDGAR |
| SC 13G/A | 2018-02-09 | VANGUARD GROUP INC | COMMUNITY BANK SYSTEM, INC. | 5,295,018 | 10.5% | EDGAR |
| SC 13G/A | 2018-01-19 | BlackRock Inc. | COMMUNITY BANK SYSTEM, INC. | 6,532,176 | 12.9% | EDGAR |
| SC 13G/A | 2017-06-12 | VANGUARD GROUP INC | COMMUNITY BANK SYSTEM, INC. | 4,895,589 | 10.6% | EDGAR |
| SC 13G/A | 2017-05-10 | STATE STREET CORP | COMMUNITY BANK SYSTEM, INC. | - | 10.0% | EDGAR |
| SC 13G | 2017-02-14 | Neuberger Berman Group LLC | COMMUNITY BANK SYSTEM, INC. | 2,279,755 | 5.1% | EDGAR |
| SC 13G/A | 2017-02-10 | VANGUARD GROUP INC | COMMUNITY BANK SYSTEM, INC. | 4,147,089 | 9.3% | EDGAR |
| SC 13G/A | 2017-01-12 | BlackRock Inc. | COMMUNITY BANK SYSTEM, INC. | 4,997,235 | 11.3% | EDGAR |
| SC 13G/A | 2016-10-07 | BlackRock Inc. | COMMUNITY BANK SYSTEM, INC. | 4,474,705 | 10.1% | EDGAR |
| SC 13G/A | 2016-02-11 | VANGUARD GROUP INC | COMMUNITY BANK SYSTEM, INC. | 3,138,151 | 7.2% | EDGAR |
| SC 13G/A | 2016-01-26 | BlackRock Inc. | COMMUNITY BANK SYSTEM, INC. | 4,029,349 | 9.8% | EDGAR |
| SC 13G/A | 2015-02-11 | VANGUARD GROUP INC | COMMUNITY BANK SYSTEM, INC. | 2,963,286 | 7.3% | EDGAR |
| SC 13G/A | 2015-01-22 | BlackRock Inc. | COMMUNITY BANK SYSTEM, INC. | 3,560,346 | 8.8% | EDGAR |
| SC 13G/A | 2014-02-12 | VANGUARD GROUP INC | COMMUNITY BANK SYSTEM, INC. | 2,392,127 | 5.9% | EDGAR |
| SC 13G/A | 2014-01-28 | BlackRock Inc. | COMMUNITY BANK SYSTEM, INC. | 3,574,749 | 8.9% | EDGAR |