{"filing":{"accession_number":"0001193125-26-258366","cik":"0001609809","ticker":"MCRB","company_name":"Seres Therapeutics, Inc.","form":"8-K","filing_date":"2026-06-05","report_date":null,"primary_document":"d156701d8k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1609809/000119312526258366/d156701d8k.htm"},"events":[{"id":3650,"run_id":3203,"accession_number":"0001193125-26-258366","anchor_item_number":"1.01","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.85,"summary":"Seres Therapeutics amended its Asset Purchase Agreement with Société des Produits Nestlé S.A., materially restructuring contingent milestone payment obligations by terminating $125M and $150M future milestone payments in exchange for a $25M immediate payment. The company also amended its lease agreement, reducing square footage by approximately 55% and decreasing lease payments by $33.9M.","company_name":"Seres Therapeutics, Inc.","ticker":"MCRB","filing_date":"2026-06-05","items":[{"id":4645,"accession_number":"0001193125-26-258366","item_number":"1.01","item_title":null,"event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.85,"reasoning":"The filing discloses two material definitive agreements under Item 1.01. The primary event is Amendment No. 1 to the Asset Purchase Agreement with Société des Produits Nestlé S.A., which materially restructures contingent milestone payment obligations—terminating $125M and $150M future milestone payments in exchange for a $25M immediate payment. This is a material modification of a prior acquisition-related agreement. The Lease Amendment, while significant operationally (reducing square footage by ~55% and decreasing lease payments by ~$33.9M), is secondary to the APA Amendment and represents a facility restructuring rather than M\u0026A activity per se.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-06-05T16:49:00.056220+00:00","company_name":"","ticker":null,"filing_date":""},{"id":4646,"accession_number":"0001193125-26-258366","item_number":"7.01","item_title":null,"event_type":"other_material","event_domain":"catchall","is_material":true,"confidence":0.65,"reasoning":"The filing discloses amendments to an Asset Purchase Agreement (APA) and a Lease Agreement via press release on June 5, 2026. While the specific terms are not detailed in this Item 7.01 excerpt, amendments to material agreements—particularly an APA—typically signal modifications to significant business arrangements or obligations. Without visibility into the substance of these amendments, this is best classified as other_material rather than a more specific event type, though it could potentially relate to ma_activity if the APA amendment materially alters an acquisition structure.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-06-05T16:49:00.056220+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":4645,"accession_number":"0001193125-26-258366","item_number":"1.01","item_title":null,"event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.85,"reasoning":"The filing discloses two material definitive agreements under Item 1.01. The primary event is Amendment No. 1 to the Asset Purchase Agreement with Société des Produits Nestlé S.A., which materially restructures contingent milestone payment obligations—terminating $125M and $150M future milestone payments in exchange for a $25M immediate payment. This is a material modification of a prior acquisition-related agreement. The Lease Amendment, while significant operationally (reducing square footage by ~55% and decreasing lease payments by ~$33.9M), is secondary to the APA Amendment and represents a facility restructuring rather than M\u0026A activity per se.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-06-05T16:49:00.056220+00:00","company_name":"Seres Therapeutics, Inc.","ticker":"MCRB","filing_date":"2026-06-05"},{"id":4646,"accession_number":"0001193125-26-258366","item_number":"7.01","item_title":null,"event_type":"other_material","event_domain":"catchall","is_material":true,"confidence":0.65,"reasoning":"The filing discloses amendments to an Asset Purchase Agreement (APA) and a Lease Agreement via press release on June 5, 2026. While the specific terms are not detailed in this Item 7.01 excerpt, amendments to material agreements—particularly an APA—typically signal modifications to significant business arrangements or obligations. Without visibility into the substance of these amendments, this is best classified as other_material rather than a more specific event type, though it could potentially relate to ma_activity if the APA amendment materially alters an acquisition structure.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-06-05T16:49:00.056220+00:00","company_name":"Seres Therapeutics, Inc.","ticker":"MCRB","filing_date":"2026-06-05"}]}