{"entity":{"type":"insider","cik":"0001316939","url":"/insider/0001316939","json_url":"/insider/0001316939.json","name":"Keefer Thomas Nelson","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":40,"n_filings":8,"first":"2005-02-14","last":"2008-09-03","span_basis":"filed_date"},"name_variants":[{"name":"Keefer Thomas Nelson","source":"filing","n_filings":8,"first_seen":"2005-02-14","last_seen":"2008-09-03"}],"transactions":[{"id":3056926,"accession":"0001316939-08-000001","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001316939-08-000001","line_url":"/filing/0001316939-08-000001","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Other","role_mark":"*","role_mark_label":"Other","role_mark_generic":"Other","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"Common","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":19600.0,"shares_display":"19,600","price_per_share":7.2,"price_display":"7.20","price_state":"stated","total_value":141120.0,"total_display":"141,120.00","total_whole":"141,120","shares_owned_after":229600.0,"shares_owned_after_display":"229,600","ownership_form":"D","is_10b5_1":null,"transaction_date":"2008-08-28","filed_date":"2008-09-03","scope":"insider","n_lines":2},{"id":3056912,"accession":"0001316939-08-000001","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001316939-08-000001","line_url":"/filing/0001316939-08-000001","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Other","role_mark":"*","role_mark_label":"Other","role_mark_generic":"Other","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"Common","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":20400.0,"shares_display":"20,400","price_per_share":7.200980392156863,"price_display":"7.20","price_state":"stated","total_value":146900.0,"total_display":"146,900.00","total_whole":"146,900","shares_owned_after":240000.0,"shares_owned_after_display":"240,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2008-08-26","filed_date":"2008-09-03","scope":"insider","n_lines":2},{"id":7527478,"accession":"0001316939-07-000002","txn_seq":8,"anchor":"line-8","filing_url":"/filing/0001316939-07-000002","line_url":"/filing/0001316939-07-000002#line-8","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Officer (Vice President)","role_mark":"O","role_mark_label":"Officer (Vice President)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Common","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":6200.0,"shares_display":"6,200","price_per_share":10.031,"price_display":"10.03","price_state":"stated","total_value":62192.2,"total_display":"62,192.20","total_whole":"62,192","shares_owned_after":260000.0,"shares_owned_after_display":"260,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2007-12-10","filed_date":"2007-12-17","scope":"insider"},{"id":7527475,"accession":"0001316939-07-000002","txn_seq":7,"anchor":"line-7","filing_url":"/filing/0001316939-07-000002","line_url":"/filing/0001316939-07-000002#line-7","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Officer (Vice President)","role_mark":"O","role_mark_label":"Officer (Vice President)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Common","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":7300.0,"shares_display":"7,300","price_per_share":10.339,"price_display":"10.34","price_state":"stated","total_value":75474.7,"total_display":"75,474.70","total_whole":"75,475","shares_owned_after":266200.0,"shares_owned_after_display":"266,200","ownership_form":"D","is_10b5_1":null,"transaction_date":"2007-12-07","filed_date":"2007-12-17","scope":"insider"},{"id":7527474,"accession":"0001316939-07-000002","txn_seq":6,"anchor":"line-6","filing_url":"/filing/0001316939-07-000002","line_url":"/filing/0001316939-07-000002#line-6","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Officer (Vice President)","role_mark":"O","role_mark_label":"Officer (Vice President)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Common","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":4600.0,"shares_display":"4,600","price_per_share":10.316,"price_display":"10.32","price_state":"stated","total_value":47453.6,"total_display":"47,453.60","total_whole":"47,454","shares_owned_after":273500.0,"shares_owned_after_display":"273,500","ownership_form":"D","is_10b5_1":null,"transaction_date":"2007-12-06","filed_date":"2007-12-17","scope":"insider"},{"id":7527471,"accession":"0001316939-07-000002","txn_seq":5,"anchor":"line-5","filing_url":"/filing/0001316939-07-000002","line_url":"/filing/0001316939-07-000002#line-5","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Officer (Vice President)","role_mark":"O","role_mark_label":"Officer (Vice President)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Common","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":10465.0,"shares_display":"10,465","price_per_share":10.193,"price_display":"10.19","price_state":"stated","total_value":106669.745,"total_display":"106,669.74","total_whole":"106,670","shares_owned_after":278100.0,"shares_owned_after_display":"278,100","ownership_form":"D","is_10b5_1":null,"transaction_date":"2007-12-05","filed_date":"2007-12-17","scope":"insider"},{"id":7527468,"accession":"0001316939-07-000002","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001316939-07-000002","line_url":"/filing/0001316939-07-000002#line-4","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Officer (Vice President)","role_mark":"O","role_mark_label":"Officer (Vice President)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Common","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5200.0,"shares_display":"5,200","price_per_share":10.0,"price_display":"10.00","price_state":"stated","total_value":52000.0,"total_display":"52,000.00","total_whole":"52,000","shares_owned_after":288565.0,"shares_owned_after_display":"288,565","ownership_form":"D","is_10b5_1":null,"transaction_date":"2007-12-03","filed_date":"2007-12-17","scope":"insider"},{"id":7527466,"accession":"0001316939-07-000002","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001316939-07-000002","line_url":"/filing/0001316939-07-000002#line-3","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Officer (Vice President)","role_mark":"O","role_mark_label":"Officer (Vice President)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Common","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3000.0,"shares_display":"3,000","price_per_share":9.935,"price_display":"9.94","price_state":"stated","total_value":29805.0,"total_display":"29,805.00","total_whole":"29,805","shares_owned_after":293765.0,"shares_owned_after_display":"293,765","ownership_form":"D","is_10b5_1":null,"transaction_date":"2007-11-30","filed_date":"2007-12-17","scope":"insider"},{"id":7527463,"accession":"0001316939-07-000002","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001316939-07-000002","line_url":"/filing/0001316939-07-000002#line-2","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Officer (Vice President)","role_mark":"O","role_mark_label":"Officer (Vice President)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Common","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1835.0,"shares_display":"1,835","price_per_share":9.828,"price_display":"9.83","price_state":"stated","total_value":18034.38,"total_display":"18,034.38","total_whole":"18,034","shares_owned_after":296765.0,"shares_owned_after_display":"296,765","ownership_form":"D","is_10b5_1":null,"transaction_date":"2007-11-29","filed_date":"2007-12-17","scope":"insider"},{"id":7527460,"accession":"0001316939-07-000002","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001316939-07-000002","line_url":"/filing/0001316939-07-000002#line-1","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Officer (Vice President)","role_mark":"O","role_mark_label":"Officer (Vice President)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Common","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1400.0,"shares_display":"1,400","price_per_share":10.665,"price_display":"10.66","price_state":"stated","total_value":14931.0,"total_display":"14,931.00","total_whole":"14,931","shares_owned_after":298600.0,"shares_owned_after_display":"298,600","ownership_form":"D","is_10b5_1":null,"transaction_date":"2007-11-28","filed_date":"2007-12-17","scope":"insider"},{"id":7092120,"accession":"0001316939-07-000001","txn_seq":5,"anchor":"line-5","filing_url":"/filing/0001316939-07-000001","line_url":"/filing/0001316939-07-000001","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Officer (Vice President)","role_mark":"O","role_mark_label":"Officer (Vice President)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":25333.0,"shares_display":"25,333","price_per_share":8.080631745154541,"price_display":"8.08","price_state":"stated","total_value":204706.644,"total_display":"204,706.64","total_whole":"204,707","shares_owned_after":300000.0,"shares_owned_after_display":"300,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2007-08-23","filed_date":"2007-08-29","scope":"insider","n_lines":2},{"id":7092116,"accession":"0001316939-07-000001","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001316939-07-000001","line_url":"/filing/0001316939-07-000001#line-3","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Officer (Vice President)","role_mark":"O","role_mark_label":"Officer (Vice President)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Common Stock","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":8.114,"price_display":"8.11","price_state":"stated","total_value":40570.0,"total_display":"40,570.00","total_whole":"40,570","shares_owned_after":325333.0,"shares_owned_after_display":"325,333","ownership_form":"D","is_10b5_1":null,"transaction_date":"2007-08-22","filed_date":"2007-08-29","scope":"insider"},{"id":7092114,"accession":"0001316939-07-000001","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001316939-07-000001","line_url":"/filing/0001316939-07-000001#line-2","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Officer (Vice President)","role_mark":"O","role_mark_label":"Officer (Vice President)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":4900.0,"shares_display":"4,900","price_per_share":8.226,"price_display":"8.23","price_state":"stated","total_value":40307.4,"total_display":"40,307.40","total_whole":"40,307","shares_owned_after":330333.0,"shares_owned_after_display":"330,333","ownership_form":"D","is_10b5_1":null,"transaction_date":"2007-08-21","filed_date":"2007-08-29","scope":"insider"},{"id":7092111,"accession":"0001316939-07-000001","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001316939-07-000001","line_url":"/filing/0001316939-07-000001#line-1","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Officer (Vice President)","role_mark":"O","role_mark_label":"Officer (Vice President)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":4767.0,"shares_display":"4,767","price_per_share":8.255,"price_display":"8.26","price_state":"stated","total_value":39351.585,"total_display":"39,351.58","total_whole":"39,352","shares_owned_after":335233.0,"shares_owned_after_display":"335,233","ownership_form":"D","is_10b5_1":null,"transaction_date":"2007-08-20","filed_date":"2007-08-29","scope":"insider"},{"id":4127898,"accession":"0001316939-06-000002","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001316939-06-000002","line_url":"/filing/0001316939-06-000002#line-2","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Officer (Vice President)","role_mark":"O","role_mark_label":"Officer (Vice President)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Common","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":38075.0,"shares_display":"38,075","price_per_share":8.0,"price_display":"8.00","price_state":"stated","total_value":304600.0,"total_display":"304,600.00","total_whole":"304,600","shares_owned_after":340000.0,"shares_owned_after_display":"340,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2006-05-23","filed_date":"2006-05-30","scope":"insider"},{"id":4127895,"accession":"0001316939-06-000002","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001316939-06-000002","line_url":"/filing/0001316939-06-000002#line-1","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Officer (Vice President)","role_mark":"O","role_mark_label":"Officer (Vice President)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Common","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":1925.0,"shares_display":"1,925","price_per_share":8.0,"price_display":"8.00","price_state":"stated","total_value":15400.0,"total_display":"15,400.00","total_whole":"15,400","shares_owned_after":378075.0,"shares_owned_after_display":"378,075","ownership_form":"D","is_10b5_1":null,"transaction_date":"2006-05-22","filed_date":"2006-05-30","scope":"insider"},{"id":3947773,"accession":"0001316939-06-000001","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001316939-06-000001","line_url":"/filing/0001316939-06-000001","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Officer (Vice President)","role_mark":"O","role_mark_label":"Officer (Vice President)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Sutron Corporation","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":22500.0,"shares_display":"22,500","price_per_share":7.32,"price_display":"7.32","price_state":"stated","total_value":164700.0,"total_display":"164,700.00","total_whole":"164,700","shares_owned_after":390000.0,"shares_owned_after_display":"390,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2006-01-04","filed_date":"2006-03-14","scope":"insider","n_lines":2},{"id":3947768,"accession":"0001316939-06-000001","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001316939-06-000001","line_url":"/filing/0001316939-06-000001","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Officer (Vice President)","role_mark":"O","role_mark_label":"Officer (Vice President)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Sutron Corporation","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":17500.0,"shares_display":"17,500","price_per_share":7.2214285714285715,"price_display":"7.22","price_state":"stated","total_value":126375.0,"total_display":"126,375.00","total_whole":"126,375","shares_owned_after":410000.0,"shares_owned_after_display":"410,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2006-01-03","filed_date":"2006-03-14","scope":"insider","n_lines":2},{"id":1277424,"accession":"0001316939-05-000003","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001316939-05-000003","line_url":"/filing/0001316939-05-000003#line-1","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Officer (Vice President), Ten percent owner","role_mark":"O","role_mark_label":"Officer (Vice President)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Common","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":40000.0,"shares_display":"40,000","price_per_share":238565.97,"price_display":"238,565.97","price_state":"stated","total_value":9542638800.0,"total_display":"9,542,638,800.00","total_whole":"9,542,638,800","shares_owned_after":420000.0,"shares_owned_after_display":"420,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2005-09-01","filed_date":"2005-09-19","scope":"insider"},{"id":1523534,"accession":"0001316939-05-000002","txn_seq":8,"anchor":"line-8","filing_url":"/filing/0001316939-05-000002","line_url":"/filing/0001316939-05-000002#line-8","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Director, Officer (Vice President), Ten percent owner","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Common","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":25275.0,"shares_display":"25,275","price_per_share":6.02,"price_display":"6.02","price_state":"stated","total_value":152155.5,"total_display":"152,155.50","total_whole":"152,156","shares_owned_after":460000.0,"shares_owned_after_display":"460,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2005-04-28","filed_date":"2005-05-17","scope":"insider"},{"id":1523533,"accession":"0001316939-05-000002","txn_seq":7,"anchor":"line-7","filing_url":"/filing/0001316939-05-000002","line_url":"/filing/0001316939-05-000002","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Director, Officer (Vice President), Ten percent owner","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President","security_title":"Common","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":15500.0,"shares_display":"15,500","price_per_share":5.959032258064516,"price_display":"5.96","price_state":"stated","total_value":92365.0,"total_display":"92,365.00","total_whole":"92,365","shares_owned_after":485275.0,"shares_owned_after_display":"485,275","ownership_form":"D","is_10b5_1":null,"transaction_date":"2005-04-27","filed_date":"2005-05-17","scope":"insider","n_lines":7},{"id":1255294,"accession":"0001316939-05-000001","txn_seq":8,"anchor":"line-8","filing_url":"/filing/0001316939-05-000001","line_url":"/filing/0001316939-05-000001#line-8","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Director, Officer (Vice President, Software Syst), Ten percent owner","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President, Software Syst.","security_title":"Common","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":8.869,"price_display":"8.87","price_state":"stated","total_value":44345.0,"total_display":"44,345.00","total_whole":"44,345","shares_owned_after":500775.0,"shares_owned_after_display":"500,775","ownership_form":"D","is_10b5_1":null,"transaction_date":"2004-12-31","filed_date":"2005-02-14","scope":"insider"},{"id":1255293,"accession":"0001316939-05-000001","txn_seq":7,"anchor":"line-7","filing_url":"/filing/0001316939-05-000001","line_url":"/filing/0001316939-05-000001#line-7","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Director, Officer (Vice President, Software Syst), Ten percent owner","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President, Software Syst.","security_title":"Common","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5500.0,"shares_display":"5,500","price_per_share":7.033,"price_display":"7.03","price_state":"stated","total_value":38681.5,"total_display":"38,681.50","total_whole":"38,682","shares_owned_after":508975.0,"shares_owned_after_display":"508,975","ownership_form":"D","is_10b5_1":null,"transaction_date":"2004-12-27","filed_date":"2005-02-14","scope":"insider"},{"id":1255292,"accession":"0001316939-05-000001","txn_seq":6,"anchor":"line-6","filing_url":"/filing/0001316939-05-000001","line_url":"/filing/0001316939-05-000001#line-6","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Director, Officer (Vice President, Software Syst), Ten percent owner","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President, Software Syst.","security_title":"Common","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3200.0,"shares_display":"3,200","price_per_share":9.825,"price_display":"9.82","price_state":"stated","total_value":31440.0,"total_display":"31,440.00","total_whole":"31,440","shares_owned_after":505775.0,"shares_owned_after_display":"505,775","ownership_form":"D","is_10b5_1":null,"transaction_date":"2004-12-26","filed_date":"2005-02-14","scope":"insider"},{"id":1255291,"accession":"0001316939-05-000001","txn_seq":5,"anchor":"line-5","filing_url":"/filing/0001316939-05-000001","line_url":"/filing/0001316939-05-000001#line-5","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Director, Officer (Vice President, Software Syst), Ten percent owner","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President, Software Syst.","security_title":"Common","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":6.8,"price_display":"6.80","price_state":"stated","total_value":34000.0,"total_display":"34,000.00","total_whole":"34,000","shares_owned_after":514475.0,"shares_owned_after_display":"514,475","ownership_form":"D","is_10b5_1":null,"transaction_date":"2004-12-23","filed_date":"2005-02-14","scope":"insider"},{"id":1255290,"accession":"0001316939-05-000001","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001316939-05-000001","line_url":"/filing/0001316939-05-000001#line-4","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Director, Officer (Vice President, Software Syst), Ten percent owner","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President, Software Syst.","security_title":"Common","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2200.0,"shares_display":"2,200","price_per_share":6.717,"price_display":"6.72","price_state":"stated","total_value":14777.4,"total_display":"14,777.40","total_whole":"14,777","shares_owned_after":519475.0,"shares_owned_after_display":"519,475","ownership_form":"D","is_10b5_1":null,"transaction_date":"2004-12-22","filed_date":"2005-02-14","scope":"insider"},{"id":1255289,"accession":"0001316939-05-000001","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001316939-05-000001","line_url":"/filing/0001316939-05-000001#line-3","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Director, Officer (Vice President, Software Syst), Ten percent owner","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President, Software Syst.","security_title":"common","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":4600.0,"shares_display":"4,600","price_per_share":6.356,"price_display":"6.36","price_state":"stated","total_value":29237.6,"total_display":"29,237.60","total_whole":"29,238","shares_owned_after":521675.0,"shares_owned_after_display":"521,675","ownership_form":"D","is_10b5_1":null,"transaction_date":"2004-12-21","filed_date":"2005-02-14","scope":"insider"},{"id":1255288,"accession":"0001316939-05-000001","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001316939-05-000001","line_url":"/filing/0001316939-05-000001#line-2","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Director, Officer (Vice President, Software Syst), Ten percent owner","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President, Software Syst.","security_title":"Common","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":6.08,"price_display":"6.08","price_state":"stated","total_value":30400.0,"total_display":"30,400.00","total_whole":"30,400","shares_owned_after":526275.0,"shares_owned_after_display":"526,275","ownership_form":"D","is_10b5_1":null,"transaction_date":"2004-12-20","filed_date":"2005-02-14","scope":"insider"},{"id":1255287,"accession":"0001316939-05-000001","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001316939-05-000001","line_url":"/filing/0001316939-05-000001#line-1","is_derivative":false,"issuer_cik":"0000728331","issuer_name":"SUTRON CORP","issuer_ticker":"STRN","issuer_name_source":null,"issuer_url":"/issuer/0000728331","owner_cik":"0001316939","owner_name":"Keefer Thomas Nelson","owner_display_name":"Keefer Thomas Nelson","owner_url":"/insider/0001316939","role":"Director, Officer (Vice President, Software Syst), Ten percent owner","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Vice President, Software Syst.","security_title":"Common","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":9500.0,"shares_display":"9,500","price_per_share":6.538,"price_display":"6.54","price_state":"stated","total_value":62111.0,"total_display":"62,111.00","total_whole":"62,111","shares_owned_after":531275.0,"shares_owned_after_display":"531,275","ownership_form":"D","is_10b5_1":null,"transaction_date":"2004-12-13","filed_date":"2005-02-14","scope":"insider"}],"collapsed":true,"next_cursor":null,"ledger_fault":false,"count":{"value":40,"kind":"exact"},"open_market_only":false,"composition":{"kind":"exact","rows":[{"code":"P","label":"Open-market purchase","n":16,"open_market":true},{"code":"S","label":"Open-market sale","n":24,"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":40},"affiliations":[{"type":"issuer","type_label":"ISSUER","cik":"0000728331","name":"SUTRON CORP","url":"/issuer/0000728331","role":"Director, Officer (Vice President), Ten percent owner, Other","n_filings":8,"first_seen":"2005-02-14","last_seen":"2008-09-03"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0001316939","retrieved_at":"2026-08-23T19:30:57+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"}}