{"entity":{"type":"insider","cik":"0002087387","url":"/insider/0002087387","json_url":"/insider/0002087387.json","name":"Johnson Nancy JoAnn","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":13,"n_filings":4,"first":"2025-11-12","last":"2026-07-20","span_basis":"filed_date"},"name_variants":[{"name":"Johnson Nancy JoAnn","source":"filing","n_filings":4,"first_seen":"2025-11-12","last_seen":"2026-07-20"}],"transactions":[{"id":5760406,"accession":"0002070849-26-000044","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0002070849-26-000044","line_url":"/filing/0002070849-26-000044","is_derivative":false,"issuer_cik":"0002070849","issuer_name":"BillionToOne, Inc.","issuer_ticker":"BLLN","issuer_name_source":null,"issuer_url":"/issuer/0002070849","owner_cik":"0002087387","owner_name":"Johnson Nancy JoAnn","owner_display_name":"Johnson Nancy JoAnn","owner_url":"/insider/0002087387","role":"Officer","role_mark":"O","role_mark_label":"Officer","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"See Remarks","security_title":"Class A Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":14199.0,"shares_display":"14,199","price_per_share":128.29270445806043,"price_display":"128.29","price_state":"stated","total_value":1821628.1106,"total_display":"1,821,628.11","total_whole":"1,821,628","shares_owned_after":7806.0,"shares_owned_after_display":"7,806","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-07-16","filed_date":"2026-07-20","scope":"insider","n_lines":4},{"id":5953228,"accession":"0002087387-26-000002","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0002087387-26-000002","line_url":"/filing/0002087387-26-000002#line-1","is_derivative":false,"issuer_cik":"0002070849","issuer_name":"BillionToOne, Inc.","issuer_ticker":"BLLN","issuer_name_source":null,"issuer_url":"/issuer/0002070849","owner_cik":"0002087387","owner_name":"Johnson Nancy JoAnn","owner_display_name":"Johnson Nancy JoAnn","owner_url":"/insider/0002087387","role":"Officer","role_mark":"O","role_mark_label":"Officer","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"See Remarks","security_title":"Class A Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":801.0,"shares_display":"801","price_per_share":124.9137,"price_display":"124.91","price_state":"stated","total_value":100055.8737,"total_display":"100,055.87","total_whole":"100,056","shares_owned_after":21099.0,"shares_owned_after_display":"21,099","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-07-01","filed_date":"2026-07-06","scope":"insider"},{"id":6010977,"accession":"0002070849-26-000036","txn_seq":7,"anchor":"line-7","filing_url":"/filing/0002070849-26-000036","line_url":"/filing/0002070849-26-000036","is_derivative":false,"issuer_cik":"0002070849","issuer_name":"BillionToOne, Inc.","issuer_ticker":"BLLN","issuer_name_source":null,"issuer_url":"/issuer/0002070849","owner_cik":"0002087387","owner_name":"Johnson Nancy JoAnn","owner_display_name":"Johnson Nancy JoAnn","owner_url":"/insider/0002087387","role":"Officer","role_mark":"O","role_mark_label":"Officer","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"See Remarks","security_title":"Class A Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":10582.0,"shares_display":"10,582","price_per_share":100.47179321489321,"price_display":"100.47","price_state":"stated","total_value":1063192.5158,"total_display":"1,063,192.52","total_whole":"1,063,193","shares_owned_after":27816.0,"shares_owned_after_display":"27,816","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-06-09","filed_date":"2026-06-10","scope":"insider","n_lines":4},{"id":6010967,"accession":"0002070849-26-000036","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0002070849-26-000036","line_url":"/filing/0002070849-26-000036","is_derivative":false,"issuer_cik":"0002070849","issuer_name":"BillionToOne, Inc.","issuer_ticker":"BLLN","issuer_name_source":null,"issuer_url":"/issuer/0002070849","owner_cik":"0002087387","owner_name":"Johnson Nancy JoAnn","owner_display_name":"Johnson Nancy JoAnn","owner_url":"/insider/0002087387","role":"Officer","role_mark":"O","role_mark_label":"Officer","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"See Remarks","security_title":"Class A Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3418.0,"shares_display":"3,418","price_per_share":99.28241146869514,"price_display":"99.28","price_state":"stated","total_value":339347.2824,"total_display":"339,347.28","total_whole":"339,347","shares_owned_after":32982.0,"shares_owned_after_display":"32,982","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-06-08","filed_date":"2026-06-10","scope":"insider","n_lines":3},{"id":5069581,"accession":"0001193125-25-278118","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001193125-25-278118","line_url":"/filing/0001193125-25-278118#line-2","is_derivative":false,"issuer_cik":"0002070849","issuer_name":"BillionToOne, Inc.","issuer_ticker":"BLLN","issuer_name_source":null,"issuer_url":"/issuer/0002070849","owner_cik":"0002087387","owner_name":"Johnson Nancy JoAnn","owner_display_name":"Johnson Nancy JoAnn","owner_url":"/insider/0002087387","role":"Officer","role_mark":"O","role_mark_label":"Officer","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"See Remarks","security_title":"Class A Common Stock","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":6900.0,"shares_display":"6,900","price_per_share":60.0,"price_display":"60.00","price_state":"stated","total_value":414000.0,"total_display":"414,000.00","total_whole":"414,000","shares_owned_after":35900.0,"shares_owned_after_display":"35,900","ownership_form":"D","is_10b5_1":null,"transaction_date":"2025-11-07","filed_date":"2025-11-12","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":1,"open_market":true},{"code":"S","label":"Open-market sale","n":12,"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":"0002070849","name":"BillionToOne, Inc.","url":"/issuer/0002070849","role":"Officer","n_filings":4,"first_seen":"2025-11-12","last_seen":"2026-07-20"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0002087387","retrieved_at":"2026-08-22T10:24:48+00:00","coverage":{"filings":1505395,"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"}}