{"entity":{"type":"insider","cik":"0001250529","url":"/insider/0001250529","json_url":"/insider/0001250529.json","name":"SINGER KAREN M","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":13,"n_filings":13,"first":"2005-08-02","last":"2015-11-19","span_basis":"filed_date"},"name_variants":[{"name":"SINGER KAREN M","source":"filing","n_filings":13,"first_seen":"2005-08-02","last_seen":"2015-11-19"}],"transactions":[{"id":8931736,"accession":"0001179110-15-015153","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001179110-15-015153","line_url":"/filing/0001179110-15-015153#line-1","is_derivative":false,"issuer_cik":"0000860546","issuer_name":"CORPORATE OFFICE PROPERTIES TRUST","issuer_ticker":"OFC","issuer_name_source":null,"issuer_url":"/issuer/0000860546","owner_cik":"0001250529","owner_name":"SINGER KAREN M","owner_display_name":"SINGER KAREN M","owner_url":"/insider/0001250529","role":"Officer (SVP, General Counsel & Sec)","role_mark":"O","role_mark_label":"Officer (SVP, General Counsel & Sec)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP, General Counsel & Sec","security_title":"Common Shares-COPT","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":7500.0,"shares_display":"7,500","price_per_share":21.55,"price_display":"21.55","price_state":"stated","total_value":161625.0,"total_display":"161,625.00","total_whole":"161,625","shares_owned_after":50302.0,"shares_owned_after_display":"50,302","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-11-17","filed_date":"2015-11-19","scope":"insider"},{"id":2419256,"accession":"0001179110-12-017109","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001179110-12-017109","line_url":"/filing/0001179110-12-017109#line-1","is_derivative":false,"issuer_cik":"0000860546","issuer_name":"CORPORATE OFFICE PROPERTIES TRUST","issuer_ticker":"OFC","issuer_name_source":null,"issuer_url":"/issuer/0000860546","owner_cik":"0001250529","owner_name":"SINGER KAREN M","owner_display_name":"SINGER KAREN M","owner_url":"/insider/0001250529","role":"Officer (SVP, General Counsel & Sec)","role_mark":"O","role_mark_label":"Officer (SVP, General Counsel & Sec)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP, General Counsel & Sec","security_title":"Common Shares","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1400.0,"shares_display":"1,400","price_per_share":24.727,"price_display":"24.73","price_state":"stated","total_value":34617.8,"total_display":"34,617.80","total_whole":"34,618","shares_owned_after":46157.0,"shares_owned_after_display":"46,157","ownership_form":"D","is_10b5_1":null,"transaction_date":"2012-12-06","filed_date":"2012-12-07","scope":"insider"},{"id":3156174,"accession":"0001179110-12-014002","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001179110-12-014002","line_url":"/filing/0001179110-12-014002#line-1","is_derivative":false,"issuer_cik":"0000860546","issuer_name":"CORPORATE OFFICE PROPERTIES TRUST","issuer_ticker":"OFC","issuer_name_source":null,"issuer_url":"/issuer/0000860546","owner_cik":"0001250529","owner_name":"SINGER KAREN M","owner_display_name":"SINGER KAREN M","owner_url":"/insider/0001250529","role":"Officer (SVP, General Counsel & Sec)","role_mark":"O","role_mark_label":"Officer (SVP, General Counsel & Sec)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP, General Counsel & Sec","security_title":"Common Shares","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3600.0,"shares_display":"3,600","price_per_share":23.88,"price_display":"23.88","price_state":"stated","total_value":85968.0,"total_display":"85,968.00","total_whole":"85,968","shares_owned_after":47557.0,"shares_owned_after_display":"47,557","ownership_form":"D","is_10b5_1":null,"transaction_date":"2012-09-12","filed_date":"2012-09-13","scope":"insider"},{"id":9241803,"accession":"0001179110-11-007934","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001179110-11-007934","line_url":"/filing/0001179110-11-007934#line-1","is_derivative":false,"issuer_cik":"0000860546","issuer_name":"CORPORATE OFFICE PROPERTIES TRUST","issuer_ticker":"OFC","issuer_name_source":null,"issuer_url":"/issuer/0000860546","owner_cik":"0001250529","owner_name":"SINGER KAREN M","owner_display_name":"SINGER KAREN M","owner_url":"/insider/0001250529","role":"Officer (SVP, General Counsel & Sec)","role_mark":"O","role_mark_label":"Officer (SVP, General Counsel & Sec)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP, General Counsel & Sec","security_title":"Common Shares","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":8500.0,"shares_display":"8,500","price_per_share":34.34,"price_display":"34.34","price_state":"stated","total_value":291890.0,"total_display":"291,890.00","total_whole":"291,890","shares_owned_after":47786.0,"shares_owned_after_display":"47,786","ownership_form":"D","is_10b5_1":null,"transaction_date":"2011-05-06","filed_date":"2011-05-13","scope":"insider"},{"id":9033845,"accession":"0001179110-11-007586","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001179110-11-007586","line_url":"/filing/0001179110-11-007586#line-1","is_derivative":false,"issuer_cik":"0000860546","issuer_name":"CORPORATE OFFICE PROPERTIES TRUST","issuer_ticker":"OFC","issuer_name_source":null,"issuer_url":"/issuer/0000860546","owner_cik":"0001250529","owner_name":"SINGER KAREN M","owner_display_name":"SINGER KAREN M","owner_url":"/insider/0001250529","role":"Officer (SVP, General Counsel & Sec)","role_mark":"O","role_mark_label":"Officer (SVP, General Counsel & Sec)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP, General Counsel & Sec","security_title":"Restricted Common Shares","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":8500.0,"shares_display":"8,500","price_per_share":34.34,"price_display":"34.34","price_state":"stated","total_value":291890.0,"total_display":"291,890.00","total_whole":"291,890","shares_owned_after":47786.0,"shares_owned_after_display":"47,786","ownership_form":"D","is_10b5_1":null,"transaction_date":"2011-05-06","filed_date":"2011-05-09","scope":"insider"},{"id":8901681,"accession":"0001179110-11-004771","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001179110-11-004771","line_url":"/filing/0001179110-11-004771#line-3","is_derivative":false,"issuer_cik":"0000860546","issuer_name":"CORPORATE OFFICE PROPERTIES TRUST","issuer_ticker":"OFC","issuer_name_source":null,"issuer_url":"/issuer/0000860546","owner_cik":"0001250529","owner_name":"SINGER KAREN M","owner_display_name":"SINGER KAREN M","owner_url":"/insider/0001250529","role":"Officer (SVP, General Counsel & Sec)","role_mark":"O","role_mark_label":"Officer (SVP, General Counsel & Sec)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP, General Counsel & Sec","security_title":"Common Shares","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":7500.0,"shares_display":"7,500","price_per_share":34.53,"price_display":"34.53","price_state":"stated","total_value":258975.0,"total_display":"258,975.00","total_whole":"258,975","shares_owned_after":56286.0,"shares_owned_after_display":"56,286","ownership_form":"D","is_10b5_1":null,"transaction_date":"2011-03-11","filed_date":"2011-03-11","scope":"insider"},{"id":7322054,"accession":"0001179110-10-013771","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001179110-10-013771","line_url":"/filing/0001179110-10-013771#line-2","is_derivative":false,"issuer_cik":"0000860546","issuer_name":"CORPORATE OFFICE PROPERTIES TRUST","issuer_ticker":"OFC","issuer_name_source":null,"issuer_url":"/issuer/0000860546","owner_cik":"0001250529","owner_name":"SINGER KAREN M","owner_display_name":"SINGER KAREN M","owner_url":"/insider/0001250529","role":"Officer (SVP, General Counsel & Sec)","role_mark":"O","role_mark_label":"Officer (SVP, General Counsel & Sec)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP, General Counsel & Sec","security_title":"Common Shares","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":4000.0,"shares_display":"4,000","price_per_share":37.901,"price_display":"37.90","price_state":"stated","total_value":151604.0,"total_display":"151,604.00","total_whole":"151,604","shares_owned_after":51696.0,"shares_owned_after_display":"51,696","ownership_form":"D","is_10b5_1":null,"transaction_date":"2010-09-14","filed_date":"2010-09-14","scope":"insider"},{"id":7516933,"accession":"0001179110-07-018277","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001179110-07-018277","line_url":"/filing/0001179110-07-018277#line-2","is_derivative":false,"issuer_cik":"0000860546","issuer_name":"CORPORATE OFFICE PROPERTIES TRUST","issuer_ticker":"OFC","issuer_name_source":null,"issuer_url":"/issuer/0000860546","owner_cik":"0001250529","owner_name":"SINGER KAREN M","owner_display_name":"SINGER KAREN M","owner_url":"/insider/0001250529","role":"Officer (SVP, General Counsel & Sec)","role_mark":"O","role_mark_label":"Officer (SVP, General Counsel & Sec)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP, General Counsel & Sec","security_title":"Common Shares","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":40.91,"price_display":"40.91","price_state":"stated","total_value":204550.0,"total_display":"204,550.00","total_whole":"204,550","shares_owned_after":21863.0,"shares_owned_after_display":"21,863","ownership_form":"D","is_10b5_1":null,"transaction_date":"2007-09-12","filed_date":"2007-09-13","scope":"insider"},{"id":7723832,"accession":"0001179110-07-005635","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001179110-07-005635","line_url":"/filing/0001179110-07-005635#line-2","is_derivative":false,"issuer_cik":"0000860546","issuer_name":"CORPORATE OFFICE PROPERTIES TRUST","issuer_ticker":"OFC","issuer_name_source":null,"issuer_url":"/issuer/0000860546","owner_cik":"0001250529","owner_name":"SINGER KAREN M","owner_display_name":"SINGER KAREN M","owner_url":"/insider/0001250529","role":"Officer (SVP, General Counsel & Sec)","role_mark":"O","role_mark_label":"Officer (SVP, General Counsel & Sec)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP, General Counsel & Sec","security_title":"Common Shares","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":5000.0,"shares_display":"5,000","price_per_share":48.62,"price_display":"48.62","price_state":"stated","total_value":243100.0,"total_display":"243,100.00","total_whole":"243,100","shares_owned_after":14348.0,"shares_owned_after_display":"14,348","ownership_form":"D","is_10b5_1":null,"transaction_date":"2007-03-06","filed_date":"2007-03-07","scope":"insider"},{"id":3879930,"accession":"0001179110-06-016419","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001179110-06-016419","line_url":"/filing/0001179110-06-016419#line-3","is_derivative":false,"issuer_cik":"0000860546","issuer_name":"CORPORATE OFFICE PROPERTIES TRUST","issuer_ticker":"OFC","issuer_name_source":null,"issuer_url":"/issuer/0000860546","owner_cik":"0001250529","owner_name":"SINGER KAREN M","owner_display_name":"SINGER KAREN M","owner_url":"/insider/0001250529","role":"Officer (VP, General Counsel & Sec)","role_mark":"O","role_mark_label":"Officer (VP, General Counsel & Sec)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"VP, General Counsel & Sec","security_title":"Common Shares","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":14000.0,"shares_display":"14,000","price_per_share":46.61,"price_display":"46.61","price_state":"stated","total_value":652540.0,"total_display":"652,540.00","total_whole":"652,540","shares_owned_after":14348.0,"shares_owned_after_display":"14,348","ownership_form":"D","is_10b5_1":null,"transaction_date":"2006-08-09","filed_date":"2006-08-09","scope":"insider"},{"id":4391452,"accession":"0001179110-06-005345","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001179110-06-005345","line_url":"/filing/0001179110-06-005345#line-2","is_derivative":false,"issuer_cik":"0000860546","issuer_name":"CORPORATE OFFICE PROPERTIES TRUST","issuer_ticker":"OFC","issuer_name_source":null,"issuer_url":"/issuer/0000860546","owner_cik":"0001250529","owner_name":"SINGER KAREN M","owner_display_name":"SINGER KAREN M","owner_url":"/insider/0001250529","role":"Officer (VP, General Counsel & Sec)","role_mark":"O","role_mark_label":"Officer (VP, General Counsel & Sec)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"VP, General Counsel & Sec","security_title":"Common Shares","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":41.67,"price_display":"41.67","price_state":"stated","total_value":208350.0,"total_display":"208,350.00","total_whole":"208,350","shares_owned_after":10247.0,"shares_owned_after_display":"10,247","ownership_form":"D","is_10b5_1":null,"transaction_date":"2006-03-02","filed_date":"2006-03-02","scope":"insider"},{"id":9239263,"accession":"0001179110-05-015339","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001179110-05-015339","line_url":"/filing/0001179110-05-015339#line-1","is_derivative":false,"issuer_cik":"0000860546","issuer_name":"CORPORATE OFFICE PROPERTIES TRUST","issuer_ticker":"OFC","issuer_name_source":null,"issuer_url":"/issuer/0000860546","owner_cik":"0001250529","owner_name":"SINGER KAREN M","owner_display_name":"SINGER KAREN M","owner_url":"/insider/0001250529","role":"Officer (VP, General Counsel & Sec)","role_mark":"O","role_mark_label":"Officer (VP, General Counsel & Sec)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"VP, General Counsel & Sec","security_title":"Common Shares","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":8000.0,"shares_display":"8,000","price_per_share":33.94,"price_display":"33.94","price_state":"stated","total_value":271520.0,"total_display":"271,520.00","total_whole":"271,520","shares_owned_after":10247.0,"shares_owned_after_display":"10,247","ownership_form":"D","is_10b5_1":null,"transaction_date":"2005-08-02","filed_date":"2005-08-03","scope":"insider"},{"id":1411889,"accession":"0001179110-05-015275","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001179110-05-015275","line_url":"/filing/0001179110-05-015275#line-2","is_derivative":false,"issuer_cik":"0000860546","issuer_name":"CORPORATE OFFICE PROPERTIES TRUST","issuer_ticker":"OFC","issuer_name_source":null,"issuer_url":"/issuer/0000860546","owner_cik":"0001250529","owner_name":"SINGER KAREN M","owner_display_name":"SINGER KAREN M","owner_url":"/insider/0001250529","role":"Officer (VP, General Counsel & Sec)","role_mark":"O","role_mark_label":"Officer (VP, General Counsel & Sec)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"VP, General Counsel & Sec","security_title":"Common Shares","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":8000.0,"shares_display":"8,000","price_per_share":33.94,"price_display":"33.94","price_state":"stated","total_value":271520.0,"total_display":"271,520.00","total_whole":"271,520","shares_owned_after":10247.0,"shares_owned_after_display":"10,247","ownership_form":"D","is_10b5_1":null,"transaction_date":"2005-08-02","filed_date":"2005-08-02","scope":"insider"}],"collapsed":true,"next_cursor":null,"ledger_fault":false,"count":{"value":13,"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":13,"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":13},"affiliations":[{"type":"issuer","type_label":"ISSUER","cik":"0000860546","name":"CORPORATE OFFICE PROPERTIES TRUST","url":"/issuer/0000860546","role":"Officer (SVP, General Counsel & Sec)","n_filings":13,"first_seen":"2005-08-02","last_seen":"2015-11-19"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0001250529","retrieved_at":"2026-08-23T12:39:55+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"}}