{"entity":{"type":"insider","cik":"0001265443","url":"/insider/0001265443","json_url":"/insider/0001265443.json","name":"DONAHUE BRIAN D","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":26,"n_filings":21,"first":"2005-06-24","last":"2018-05-03","span_basis":"filed_date"},"name_variants":[{"name":"DONAHUE BRIAN D","source":"filing","n_filings":21,"first_seen":"2005-06-24","last_seen":"2018-05-03"}],"transactions":[{"id":6753317,"accession":"0001127602-18-016238","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001127602-18-016238","line_url":"/filing/0001127602-18-016238#line-4","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM, INC.","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (EVP & Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (EVP & Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP & Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":62.0,"shares_display":"62","price_per_share":57.0342,"price_display":"57.03","price_state":"stated","total_value":3536.1204,"total_display":"3,536.12","total_whole":"3,536","shares_owned_after":39401.0,"shares_owned_after_display":"39,401","ownership_form":"D","is_10b5_1":null,"transaction_date":"2018-05-03","filed_date":"2018-05-03","scope":"insider"},{"id":6753311,"accession":"0001127602-18-016238","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001127602-18-016238","line_url":"/filing/0001127602-18-016238#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM, INC.","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (EVP & Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (EVP & Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP & Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5087.0,"shares_display":"5,087","price_per_share":57.7841,"price_display":"57.78","price_state":"stated","total_value":293947.7167,"total_display":"293,947.72","total_whole":"293,948","shares_owned_after":39401.0,"shares_owned_after_display":"39,401","ownership_form":"D","is_10b5_1":null,"transaction_date":"2018-05-02","filed_date":"2018-05-03","scope":"insider"},{"id":5328071,"accession":"0001127602-17-035424","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001127602-17-035424","line_url":"/filing/0001127602-17-035424#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM, INC.","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (EVP & Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (EVP & Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP & Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5535.0,"shares_display":"5,535","price_per_share":55.1908,"price_display":"55.19","price_state":"stated","total_value":305481.078,"total_display":"305,481.08","total_whole":"305,481","shares_owned_after":38309.0,"shares_owned_after_display":"38,309","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-12-21","filed_date":"2017-12-22","scope":"insider"},{"id":2555595,"accession":"0001127602-16-050288","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001127602-16-050288","line_url":"/filing/0001127602-16-050288#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM, INC.","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (EVP & Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (EVP & Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP & Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":8084.0,"shares_display":"8,084","price_per_share":39.75,"price_display":"39.75","price_state":"stated","total_value":321339.0,"total_display":"321,339.00","total_whole":"321,339","shares_owned_after":37678.0,"shares_owned_after_display":"37,678","ownership_form":"D","is_10b5_1":null,"transaction_date":"2016-04-29","filed_date":"2016-04-29","scope":"insider"},{"id":8288215,"accession":"0001127602-15-031029","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001127602-15-031029","line_url":"/filing/0001127602-15-031029#line-3","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM, INC.","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":6000.0,"shares_display":"6,000","price_per_share":42.572,"price_display":"42.57","price_state":"stated","total_value":255432.0,"total_display":"255,432.00","total_whole":"255,432","shares_owned_after":33759.0,"shares_owned_after_display":"33,759","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-11-09","filed_date":"2015-11-10","scope":"insider"},{"id":8799446,"accession":"0001127602-15-021177","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001127602-15-021177","line_url":"/filing/0001127602-15-021177#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM, INC.","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":6182.0,"shares_display":"6,182","price_per_share":37.4882,"price_display":"37.49","price_state":"stated","total_value":231752.0524,"total_display":"231,752.05","total_whole":"231,752","shares_owned_after":33759.0,"shares_owned_after_display":"33,759","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-06-22","filed_date":"2015-06-23","scope":"insider"},{"id":6575558,"accession":"0001127602-14-036183","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001127602-14-036183","line_url":"/filing/0001127602-14-036183#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM, INC.","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5500.0,"shares_display":"5,500","price_per_share":38.75,"price_display":"38.75","price_state":"stated","total_value":213125.0,"total_display":"213,125.00","total_whole":"213,125","shares_owned_after":32318.0,"shares_owned_after_display":"32,318","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-12-30","filed_date":"2014-12-31","scope":"insider"},{"id":5246726,"accession":"0001127602-13-025081","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001127602-13-025081","line_url":"/filing/0001127602-13-025081#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM, INC.","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1582.0,"shares_display":"1,582","price_per_share":34.25,"price_display":"34.25","price_state":"stated","total_value":54183.5,"total_display":"54,183.50","total_whole":"54,184","shares_owned_after":31483.0,"shares_owned_after_display":"31,483","ownership_form":"D","is_10b5_1":null,"transaction_date":"2013-08-13","filed_date":"2013-08-14","scope":"insider"},{"id":4437337,"accession":"0001127602-13-024932","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001127602-13-024932","line_url":"/filing/0001127602-13-024932#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM, INC.","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5982.0,"shares_display":"5,982","price_per_share":34.25,"price_display":"34.25","price_state":"stated","total_value":204883.5,"total_display":"204,883.50","total_whole":"204,884","shares_owned_after":31483.0,"shares_owned_after_display":"31,483","ownership_form":"D","is_10b5_1":null,"transaction_date":"2013-08-09","filed_date":"2013-08-12","scope":"insider"},{"id":4861534,"accession":"0001127602-13-024759","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001127602-13-024759","line_url":"/filing/0001127602-13-024759#line-4","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM, INC.","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1500.0,"shares_display":"1,500","price_per_share":34.256,"price_display":"34.26","price_state":"stated","total_value":51384.0,"total_display":"51,384.00","total_whole":"51,384","shares_owned_after":31483.0,"shares_owned_after_display":"31,483","ownership_form":"D","is_10b5_1":null,"transaction_date":"2013-08-08","filed_date":"2013-08-08","scope":"insider"},{"id":4861523,"accession":"0001127602-13-024759","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001127602-13-024759","line_url":"/filing/0001127602-13-024759#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM, INC.","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1075.0,"shares_display":"1,075","price_per_share":34.5721,"price_display":"34.57","price_state":"stated","total_value":37165.0075,"total_display":"37,165.01","total_whole":"37,165","shares_owned_after":31483.0,"shares_owned_after_display":"31,483","ownership_form":"D","is_10b5_1":null,"transaction_date":"2013-08-06","filed_date":"2013-08-08","scope":"insider"},{"id":4575755,"accession":"0001127602-13-011937","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001127602-13-011937","line_url":"/filing/0001127602-13-011937#line-4","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM INC","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5993.0,"shares_display":"5,993","price_per_share":29.7283,"price_display":"29.73","price_state":"stated","total_value":178161.7019,"total_display":"178,161.70","total_whole":"178,162","shares_owned_after":31483.0,"shares_owned_after_display":"31,483","ownership_form":"D","is_10b5_1":null,"transaction_date":"2013-03-25","filed_date":"2013-03-25","scope":"insider"},{"id":4575753,"accession":"0001127602-13-011937","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001127602-13-011937","line_url":"/filing/0001127602-13-011937#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM INC","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3085.0,"shares_display":"3,085","price_per_share":29.7023,"price_display":"29.70","price_state":"stated","total_value":91631.5955,"total_display":"91,631.60","total_whole":"91,632","shares_owned_after":31483.0,"shares_owned_after_display":"31,483","ownership_form":"D","is_10b5_1":null,"transaction_date":"2013-03-22","filed_date":"2013-03-25","scope":"insider"},{"id":3491952,"accession":"0001127602-12-021355","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001127602-12-021355","line_url":"/filing/0001127602-12-021355#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM INC","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5898.0,"shares_display":"5,898","price_per_share":27.0064,"price_display":"27.01","price_state":"stated","total_value":159283.7472,"total_display":"159,283.75","total_whole":"159,284","shares_owned_after":26185.0,"shares_owned_after_display":"26,185","ownership_form":"D","is_10b5_1":null,"transaction_date":"2012-06-29","filed_date":"2012-07-03","scope":"insider"},{"id":3281056,"accession":"0001127602-12-011726","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001127602-12-011726","line_url":"/filing/0001127602-12-011726#line-3","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM INC","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2400.0,"shares_display":"2,400","price_per_share":28.7921,"price_display":"28.79","price_state":"stated","total_value":69101.04,"total_display":"69,101.04","total_whole":"69,101","shares_owned_after":26185.0,"shares_owned_after_display":"26,185","ownership_form":"D","is_10b5_1":null,"transaction_date":"2012-03-21","filed_date":"2012-03-23","scope":"insider"},{"id":9083903,"accession":"0001127602-11-028684","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001127602-11-028684","line_url":"/filing/0001127602-11-028684#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM INC","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":6954.0,"shares_display":"6,954","price_per_share":25.7535,"price_display":"25.75","price_state":"stated","total_value":179089.839,"total_display":"179,089.84","total_whole":"179,090","shares_owned_after":23041.0,"shares_owned_after_display":"23,041","ownership_form":"D","is_10b5_1":null,"transaction_date":"2011-11-03","filed_date":"2011-11-04","scope":"insider"},{"id":7454824,"accession":"0001127602-10-020689","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001127602-10-020689","line_url":"/filing/0001127602-10-020689#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM INC","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1844.0,"shares_display":"1,844","price_per_share":25.5,"price_display":"25.50","price_state":"stated","total_value":47022.0,"total_display":"47,022.00","total_whole":"47,022","shares_owned_after":19746.0,"shares_owned_after_display":"19,746","ownership_form":"D","is_10b5_1":null,"transaction_date":"2010-08-03","filed_date":"2010-08-05","scope":"insider"},{"id":7135723,"accession":"0001127602-10-006833","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001127602-10-006833","line_url":"/filing/0001127602-10-006833#line-4","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM INC","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5394.0,"shares_display":"5,394","price_per_share":22.4672,"price_display":"22.47","price_state":"stated","total_value":121188.0768,"total_display":"121,188.08","total_whole":"121,188","shares_owned_after":19746.0,"shares_owned_after_display":"19,746","ownership_form":"D","is_10b5_1":null,"transaction_date":"2010-03-01","filed_date":"2010-03-02","scope":"insider"},{"id":7135719,"accession":"0001127602-10-006833","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001127602-10-006833","line_url":"/filing/0001127602-10-006833#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM INC","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2606.0,"shares_display":"2,606","price_per_share":22.5106,"price_display":"22.51","price_state":"stated","total_value":58662.6236,"total_display":"58,662.62","total_whole":"58,663","shares_owned_after":19746.0,"shares_owned_after_display":"19,746","ownership_form":"D","is_10b5_1":null,"transaction_date":"2010-02-26","filed_date":"2010-03-02","scope":"insider"},{"id":5815464,"accession":"0001127602-09-025533","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001127602-09-025533","line_url":"/filing/0001127602-09-025533#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM INC","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2856.0,"shares_display":"2,856","price_per_share":19.0,"price_display":"19.00","price_state":"stated","total_value":54264.0,"total_display":"54,264.00","total_whole":"54,264","shares_owned_after":18190.0,"shares_owned_after_display":"18,190","ownership_form":"D","is_10b5_1":null,"transaction_date":"2009-12-15","filed_date":"2009-12-17","scope":"insider"},{"id":3575073,"accession":"0001239944-08-000024","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001239944-08-000024","line_url":"/filing/0001239944-08-000024#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM INC","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5900.0,"shares_display":"5,900","price_per_share":24.9,"price_display":"24.90","price_state":"stated","total_value":146910.0,"total_display":"146,910.00","total_whole":"146,910","shares_owned_after":15392.0,"shares_owned_after_display":"15,392","ownership_form":"D","is_10b5_1":null,"transaction_date":"2008-03-19","filed_date":"2008-03-20","scope":"insider"},{"id":7980248,"accession":"0001239944-07-000068","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001239944-07-000068","line_url":"/filing/0001239944-07-000068#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM INC","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":4090.0,"shares_display":"4,090","price_per_share":20.5,"price_display":"20.50","price_state":"stated","total_value":83845.0,"total_display":"83,845.00","total_whole":"83,845","shares_owned_after":14030.0,"shares_owned_after_display":"14,030","ownership_form":"D","is_10b5_1":null,"transaction_date":"2007-12-06","filed_date":"2007-12-07","scope":"insider"},{"id":3118438,"accession":"0001239944-06-000111","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001239944-06-000111","line_url":"/filing/0001239944-06-000111#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM INC","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2500.0,"shares_display":"2,500","price_per_share":24.8912,"price_display":"24.89","price_state":"stated","total_value":62228.0,"total_display":"62,228.00","total_whole":"62,228","shares_owned_after":11763.0,"shares_owned_after_display":"11,763","ownership_form":"D","is_10b5_1":null,"transaction_date":"2006-10-31","filed_date":"2006-11-02","scope":"insider"},{"id":3860404,"accession":"0001239944-06-000103","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001239944-06-000103","line_url":"/filing/0001239944-06-000103#line-2","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM INC","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Banking Officer)","role_mark":"O","role_mark_label":"Officer (Chief Banking Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Banking Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1857.0,"shares_display":"1,857","price_per_share":22.73,"price_display":"22.73","price_state":"stated","total_value":42209.61,"total_display":"42,209.61","total_whole":"42,210","shares_owned_after":11763.0,"shares_owned_after_display":"11,763","ownership_form":"D","is_10b5_1":null,"transaction_date":"2006-09-28","filed_date":"2006-09-29","scope":"insider"},{"id":1570855,"accession":"0001239944-05-000064","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001239944-05-000064","line_url":"/filing/0001239944-05-000064","is_derivative":false,"issuer_cik":"0000723188","issuer_name":"COMMUNITY BANK SYSTEM INC","issuer_ticker":"CBU","issuer_name_source":null,"issuer_url":"/issuer/0000723188","owner_cik":"0001265443","owner_name":"DONAHUE BRIAN D","owner_display_name":"DONAHUE BRIAN D","owner_url":"/insider/0001265443","role":"Officer (Chief Credit Officer)","role_mark":"O","role_mark_label":"Officer (Chief Credit Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Credit Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2000.0,"shares_display":"2,000","price_per_share":24.602,"price_display":"24.60","price_state":"stated","total_value":49204.0,"total_display":"49,204.00","total_whole":"49,204","shares_owned_after":7320.0,"shares_owned_after_display":"7,320","ownership_form":"D","is_10b5_1":null,"transaction_date":"2005-06-22","filed_date":"2005-06-24","scope":"insider","n_lines":2}],"collapsed":true,"next_cursor":null,"ledger_fault":false,"count":{"value":26,"kind":"exact"},"open_market_only":false,"composition":{"kind":"exact","rows":[{"code":"P","label":"Open-market purchase","n":0,"open_market":true},{"code":"S","label":"Open-market sale","n":26,"open_market":true},{"code":"M","label":"Option exercise","n":0,"open_market":false},{"code":"A","label":"Grant or award","n":0,"open_market":false},{"code":"F","label":"Tax withholding","n":0,"open_market":false},{"code":"D","label":"Disposition to the issuer","n":0,"open_market":false},{"code":"X","label":"In-the-money option exercise","n":0,"open_market":false}],"total":26},"affiliations":[{"type":"issuer","type_label":"ISSUER","cik":"0000723188","name":"COMMUNITY BANK SYSTEM, INC.","url":"/issuer/0000723188","role":"Officer (EVP & Chief Banking Officer)","n_filings":21,"first_seen":"2005-06-24","last_seen":"2018-05-03"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0001265443","retrieved_at":"2026-08-24T01:38:09+00:00","coverage":{"filings":1506293,"transactions":4290787,"issuers":28597,"insiders":152303,"first_filed_date":"2003-06-30","last_filed_date":"2026-08-21","last_ingest":"2026-08-22T05:23:40.159918+00:00","counts_are":{"filings":"estimate","transactions":"estimate","issuers":"estimate","insiders":"estimate"},"source":"SEC EDGAR Form 4 filings, parsed by ebomi","fault":false},"license":{"underlying_records":"US SEC filings are public records of the United States government and are not subject to copyright. The transactional facts in them are not ours to license.","this_presentation":"The parsing, normalisation, curation, and presentation are ebomi's own work.","grant":"undecided","grant_note":"The open licence for ebomi's own layer is an open owner decision (SPEC-20260731T1159Z open question 3: CC BY 4.0 or CC0 with a citation request). Until it is taken, no grant is asserted here.","citation_request":"Balogh, A. Insider trading. Scientific Data 10, 237 (2023)","url":"https://ebomi.com/license"},"fair_use":{"policy":"These JSON endpoints are open and unauthenticated. Please read them at a human pace, identify your client in the User-Agent header, and use the published dataset for bulk work rather than crawling page by page.","bulk_alternative":"doi:10.1038/s41597-023-02147-6"}}