{"filing":{"accession_number":"0002070849-26-000042","cik":"0002070849","ticker":"BLLN","company_name":"BillionToOne, Inc.","form":"8-K","filing_date":"2026-06-29","report_date":null,"primary_document":"blln-20260623.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/2070849/000207084926000042/blln-20260623.htm"},"events":[{"id":14634,"run_id":13036,"accession_number":"0002070849-26-000042","anchor_item_number":"1.01","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"summary":"BillionToOne entered into a material 12-year lease for approximately 62,659 square feet of laboratory and office space with aggregate base rent of $46.7 million, representing a 16% expansion of total facility space and more than tripling oncology-dedicated laboratory capacity.","company_name":"BillionToOne, Inc.","ticker":"BLLN","filing_date":"2026-06-29","form":"8-K","submitted_at":null,"items":[{"id":12116,"accession_number":"0002070849-26-000042","item_number":"1.01","item_title":"Entry into a Material Definitive Agreement.","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"BillionToOne entered into a material 12-year lease for approximately 62,659 square feet of laboratory and office space with aggregate base rent of $46.7 million, representing a 16% expansion of total facility space and more than tripling oncology-dedicated laboratory capacity. While Item 1.01 typically covers M\u0026A activity, this is a material operational/strategic commitment to expand infrastructure in response to growth in test volumes, making it an operational event rather than an acquisition or change of control.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-06-29T20:11:41.660455+00:00","company_name":"","ticker":null,"filing_date":""},{"id":12117,"accession_number":"0002070849-26-000042","item_number":"2.03","item_title":"Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of Registrant.","event_type":"debt_issuance","event_domain":"financial","is_material":true,"confidence":0.75,"reasoning":"Item 2.03 discloses creation of a direct financial obligation via a Lease Agreement referenced from Item 1.01. Lease obligations constitute direct financial obligations under ASC 842 and are material to investors assessing the registrant's capital structure and liquidity. The classification as debt_issuance is appropriate for new lease obligations, though the materiality and specific terms depend on the lease details in Item 1.01.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-06-29T20:11:41.660455+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":12116,"accession_number":"0002070849-26-000042","item_number":"1.01","item_title":"Entry into a Material Definitive Agreement.","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"BillionToOne entered into a material 12-year lease for approximately 62,659 square feet of laboratory and office space with aggregate base rent of $46.7 million, representing a 16% expansion of total facility space and more than tripling oncology-dedicated laboratory capacity. While Item 1.01 typically covers M\u0026A activity, this is a material operational/strategic commitment to expand infrastructure in response to growth in test volumes, making it an operational event rather than an acquisition or change of control.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-06-29T20:11:41.660455+00:00","company_name":"BillionToOne, Inc.","ticker":"BLLN","filing_date":"2026-06-29"},{"id":12117,"accession_number":"0002070849-26-000042","item_number":"2.03","item_title":"Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of Registrant.","event_type":"debt_issuance","event_domain":"financial","is_material":true,"confidence":0.75,"reasoning":"Item 2.03 discloses creation of a direct financial obligation via a Lease Agreement referenced from Item 1.01. Lease obligations constitute direct financial obligations under ASC 842 and are material to investors assessing the registrant's capital structure and liquidity. The classification as debt_issuance is appropriate for new lease obligations, though the materiality and specific terms depend on the lease details in Item 1.01.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-06-29T20:11:41.660455+00:00","company_name":"BillionToOne, Inc.","ticker":"BLLN","filing_date":"2026-06-29"}]}