{"entity":{"type":"insider","cik":"0001669976","url":"/insider/0001669976","json_url":"/insider/0001669976.json","name":"BRYNJELSEN SEAN","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":18,"n_filings":9,"first":"2018-11-15","last":"2026-08-20","span_basis":"filed_date"},"name_variants":[{"name":"BRYNJELSEN SEAN","source":"filing","n_filings":9,"first_seen":"2018-11-15","last_seen":"2026-08-20"}],"transactions":[{"id":9299212,"accession":"0001437749-26-028651","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001437749-26-028651","line_url":"/filing/0001437749-26-028651","is_derivative":false,"issuer_cik":"0001710340","issuer_name":"Eton Pharmaceuticals, Inc.","issuer_ticker":"ETON","issuer_name_source":null,"issuer_url":"/issuer/0001710340","owner_cik":"0001669976","owner_name":"BRYNJELSEN SEAN","owner_display_name":"BRYNJELSEN SEAN","owner_url":"/insider/0001669976","role":"Director, Officer (President & CEO)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"President & CEO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":91022.0,"shares_display":"91,022","price_per_share":60.70292083232625,"price_display":"60.70","price_state":"stated","total_value":5525301.26,"total_display":"5,525,301.26","total_whole":"5,525,301","shares_owned_after":961194.0,"shares_owned_after_display":"961,194","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-08-20","filed_date":"2026-08-20","scope":"insider","n_lines":3},{"id":9299209,"accession":"0001437749-26-028651","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001437749-26-028651","line_url":"/filing/0001437749-26-028651#line-1","is_derivative":false,"issuer_cik":"0001710340","issuer_name":"Eton Pharmaceuticals, Inc.","issuer_ticker":"ETON","issuer_name_source":null,"issuer_url":"/issuer/0001710340","owner_cik":"0001669976","owner_name":"BRYNJELSEN SEAN","owner_display_name":"BRYNJELSEN SEAN","owner_url":"/insider/0001669976","role":"Director, Officer (President & CEO)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"President & CEO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":8978.0,"shares_display":"8,978","price_per_share":62.65,"price_display":"62.65","price_state":"stated","total_value":562471.7,"total_display":"562,471.70","total_whole":"562,472","shares_owned_after":1052216.0,"shares_owned_after_display":"1,052,216","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-08-19","filed_date":"2026-08-20","scope":"insider"},{"id":5844304,"accession":"0001437749-26-018879","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001437749-26-018879","line_url":"/filing/0001437749-26-018879","is_derivative":false,"issuer_cik":"0001669976","issuer_name":"Eton Pharmaceuticals, Inc.","issuer_ticker":"ETON","issuer_name_source":null,"issuer_url":"/issuer/0001669976","owner_cik":"0001669976","owner_name":"BRYNJELSEN SEAN","owner_display_name":"BRYNJELSEN SEAN","owner_url":"/insider/0001669976","role":"Director, Officer (President & CEO)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"President & CEO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":120000.0,"shares_display":"120,000","price_per_share":31.880974333333334,"price_display":"31.88","price_state":"stated","total_value":3825716.92,"total_display":"3,825,716.92","total_whole":"3,825,717","shares_owned_after":833842.0,"shares_owned_after_display":"833,842","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-05-28","filed_date":"2026-05-29","scope":"insider","n_lines":2},{"id":4781688,"accession":"0001437749-25-019583","txn_seq":5,"anchor":"line-5","filing_url":"/filing/0001437749-25-019583","line_url":"/filing/0001437749-25-019583#line-5","is_derivative":false,"issuer_cik":"0001669976","issuer_name":"Eton Pharmaceuticals, Inc.","issuer_ticker":"ETON","issuer_name_source":null,"issuer_url":"/issuer/0001669976","owner_cik":"0001669976","owner_name":"BRYNJELSEN SEAN","owner_display_name":"BRYNJELSEN SEAN","owner_url":"/insider/0001669976","role":"Director, Officer (President & CEO), Ten percent owner","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"President & CEO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":70000.0,"shares_display":"70,000","price_per_share":16.81,"price_display":"16.81","price_state":"stated","total_value":1176700.0,"total_display":"1,176,700.00","total_whole":"1,176,700","shares_owned_after":2873513.0,"shares_owned_after_display":"2,873,513","ownership_form":"D","is_10b5_1":null,"transaction_date":"2025-06-05","filed_date":"2025-06-05","scope":"insider"},{"id":4781685,"accession":"0001437749-25-019583","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001437749-25-019583","line_url":"/filing/0001437749-25-019583#line-4","is_derivative":false,"issuer_cik":"0001669976","issuer_name":"Eton Pharmaceuticals, Inc.","issuer_ticker":"ETON","issuer_name_source":null,"issuer_url":"/issuer/0001669976","owner_cik":"0001669976","owner_name":"BRYNJELSEN SEAN","owner_display_name":"BRYNJELSEN SEAN","owner_url":"/insider/0001669976","role":"Director, Officer (President & CEO), Ten percent owner","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"President & CEO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":70000.0,"shares_display":"70,000","price_per_share":17.0,"price_display":"17.00","price_state":"stated","total_value":1190000.0,"total_display":"1,190,000.00","total_whole":"1,190,000","shares_owned_after":2943513.0,"shares_owned_after_display":"2,943,513","ownership_form":"D","is_10b5_1":null,"transaction_date":"2025-06-04","filed_date":"2025-06-05","scope":"insider"},{"id":4781680,"accession":"0001437749-25-019583","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001437749-25-019583","line_url":"/filing/0001437749-25-019583","is_derivative":false,"issuer_cik":"0001669976","issuer_name":"Eton Pharmaceuticals, Inc.","issuer_ticker":"ETON","issuer_name_source":null,"issuer_url":"/issuer/0001669976","owner_cik":"0001669976","owner_name":"BRYNJELSEN SEAN","owner_display_name":"BRYNJELSEN SEAN","owner_url":"/insider/0001669976","role":"Director, Officer (President & CEO), Ten percent owner","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"President & CEO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":70000.0,"shares_display":"70,000","price_per_share":17.513014285714284,"price_display":"17.51","price_state":"stated","total_value":1225911.0,"total_display":"1,225,911.00","total_whole":"1,225,911","shares_owned_after":3022568.0,"shares_owned_after_display":"3,022,568","ownership_form":"D","is_10b5_1":null,"transaction_date":"2025-06-03","filed_date":"2025-06-05","scope":"insider","n_lines":3},{"id":6781446,"accession":"0001493152-22-026629","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001493152-22-026629","line_url":"/filing/0001493152-22-026629#line-1","is_derivative":false,"issuer_cik":"0001669976","issuer_name":"Eton Pharmaceuticals, Inc.","issuer_ticker":"ETON","issuer_name_source":null,"issuer_url":"/issuer/0001669976","owner_cik":"0001669976","owner_name":"BRYNJELSEN SEAN","owner_display_name":"BRYNJELSEN SEAN","owner_url":"/insider/0001669976","role":"Director, Officer (Chief Executive Officer)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Executive Officer","security_title":"Common Stock","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":10000.0,"shares_display":"10,000","price_per_share":2.1042,"price_display":"2.10","price_state":"stated","total_value":21042.0,"total_display":"21,042.00","total_whole":"21,042","shares_owned_after":1040000.0,"shares_owned_after_display":"1,040,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-09-22","filed_date":"2022-09-23","scope":"insider"},{"id":4558569,"accession":"0001493152-21-020807","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001493152-21-020807","line_url":"/filing/0001493152-21-020807#line-1","is_derivative":false,"issuer_cik":"0001669976","issuer_name":"Eton Pharmaceuticals, Inc.","issuer_ticker":"ETON","issuer_name_source":null,"issuer_url":"/issuer/0001669976","owner_cik":"0001669976","owner_name":"BRYNJELSEN SEAN","owner_display_name":"BRYNJELSEN SEAN","owner_url":"/insider/0001669976","role":"Director, Officer (President & CEO)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"President & CEO","security_title":"Common Stock","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":10000.0,"shares_display":"10,000","price_per_share":4.32,"price_display":"4.32","price_state":"stated","total_value":43200.0,"total_display":"43,200.00","total_whole":"43,200","shares_owned_after":1030000.0,"shares_owned_after_display":"1,030,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-08-20","filed_date":"2021-08-20","scope":"insider"},{"id":4928601,"accession":"0001493152-21-013513","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001493152-21-013513","line_url":"/filing/0001493152-21-013513#line-1","is_derivative":false,"issuer_cik":"0001669976","issuer_name":"Eton Pharmaceuticals, Inc.","issuer_ticker":"ETON","issuer_name_source":null,"issuer_url":"/issuer/0001669976","owner_cik":"0001669976","owner_name":"BRYNJELSEN SEAN","owner_display_name":"BRYNJELSEN SEAN","owner_url":"/insider/0001669976","role":"Director, Officer (President & CEO)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"President & CEO","security_title":"Common Stock","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":5000.0,"shares_display":"5,000","price_per_share":5.96,"price_display":"5.96","price_state":"stated","total_value":29800.0,"total_display":"29,800.00","total_whole":"29,800","shares_owned_after":1030000.0,"shares_owned_after_display":"1,030,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-06-03","filed_date":"2021-06-03","scope":"insider"},{"id":7927899,"accession":"0001209191-19-045738","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001209191-19-045738","line_url":"/filing/0001209191-19-045738#line-1","is_derivative":false,"issuer_cik":"0001669976","issuer_name":"Eton Pharmaceuticals, Inc.","issuer_ticker":"ETON","issuer_name_source":null,"issuer_url":"/issuer/0001669976","owner_cik":"0001669976","owner_name":"BRYNJELSEN SEAN","owner_display_name":"BRYNJELSEN SEAN","owner_url":"/insider/0001669976","role":"Director, Officer (President & CEO)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"President & CEO","security_title":"Common Stock","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":5000.0,"shares_display":"5,000","price_per_share":6.15,"price_display":"6.15","price_state":"stated","total_value":30750.0,"total_display":"30,750.00","total_whole":"30,750","shares_owned_after":1025000.0,"shares_owned_after_display":"1,025,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2019-08-13","filed_date":"2019-08-13","scope":"insider"},{"id":8646181,"accession":"0001209191-19-032054","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-19-032054","line_url":"/filing/0001209191-19-032054#line-2","is_derivative":false,"issuer_cik":"0001669976","issuer_name":"Eton Pharmaceuticals, Inc.","issuer_ticker":"ETON","issuer_name_source":null,"issuer_url":"/issuer/0001669976","owner_cik":"0001669976","owner_name":"BRYNJELSEN SEAN","owner_display_name":"BRYNJELSEN SEAN","owner_url":"/insider/0001669976","role":"Director, Officer (President & CEO)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"President & CEO","security_title":"Common Stock","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":8600.0,"shares_display":"8,600","price_per_share":7.9571,"price_display":"7.96","price_state":"stated","total_value":68431.06,"total_display":"68,431.06","total_whole":"68,431","shares_owned_after":1020000.0,"shares_owned_after_display":"1,020,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2019-05-21","filed_date":"2019-05-22","scope":"insider"},{"id":8646179,"accession":"0001209191-19-032054","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001209191-19-032054","line_url":"/filing/0001209191-19-032054#line-1","is_derivative":false,"issuer_cik":"0001669976","issuer_name":"Eton Pharmaceuticals, Inc.","issuer_ticker":"ETON","issuer_name_source":null,"issuer_url":"/issuer/0001669976","owner_cik":"0001669976","owner_name":"BRYNJELSEN SEAN","owner_display_name":"BRYNJELSEN SEAN","owner_url":"/insider/0001669976","role":"Director, Officer (President & CEO)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"President & CEO","security_title":"Common Stock","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":1400.0,"shares_display":"1,400","price_per_share":7.782,"price_display":"7.78","price_state":"stated","total_value":10894.8,"total_display":"10,894.80","total_whole":"10,895","shares_owned_after":1011400.0,"shares_owned_after_display":"1,011,400","ownership_form":"D","is_10b5_1":null,"transaction_date":"2019-05-20","filed_date":"2019-05-22","scope":"insider"},{"id":6662872,"accession":"0001209191-18-058826","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-18-058826","line_url":"/filing/0001209191-18-058826#line-2","is_derivative":false,"issuer_cik":"0001669976","issuer_name":"Eton Pharmaceuticals, Inc.","issuer_ticker":"ETON","issuer_name_source":null,"issuer_url":"/issuer/0001669976","owner_cik":"0001669976","owner_name":"BRYNJELSEN SEAN","owner_display_name":"BRYNJELSEN SEAN","owner_url":"/insider/0001669976","role":"Director, Officer (President & CEO)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"President & CEO","security_title":"Common Stock","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":10000.0,"shares_display":"10,000","price_per_share":6.0,"price_display":"6.00","price_state":"stated","total_value":60000.0,"total_display":"60,000.00","total_whole":"60,000","shares_owned_after":1010000.0,"shares_owned_after_display":"1,010,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2018-11-15","filed_date":"2018-11-15","scope":"insider"}],"collapsed":true,"next_cursor":null,"ledger_fault":false,"count":{"value":18,"kind":"exact"},"open_market_only":false,"composition":{"kind":"exact","rows":[{"code":"P","label":"Open-market purchase","n":7,"open_market":true},{"code":"S","label":"Open-market sale","n":11,"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":18},"affiliations":[{"type":"issuer","type_label":"ISSUER","cik":"0001710340","name":"Eton Pharmaceuticals, Inc.","url":"/issuer/0001710340","role":"Director, Officer (President & CEO), Ten percent owner","n_filings":9,"first_seen":"2018-11-15","last_seen":"2026-08-20"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0001669976","retrieved_at":"2026-08-23T07:38:48+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"}}