{"cik":"0002130606","entityType":"operating","sic":"2834","sicDescription":"Pharmaceutical Preparations","ownerOrg":"03 Life Sciences","insiderTransactionForOwnerExists":0,"insiderTransactionForIssuerExists":1,"name":"Obsidian Therapeutics, Inc.","tickers":["OBX"],"exchanges":["Nasdaq"],"ein":"421977778","lei":null,"description":"","website":"","investorWebsite":"","category":"<br>Emerging growth company","fiscalYearEnd":"1231","stateOfIncorporation":"","stateOfIncorporationDescription":"","addresses":{"mailing":{"street1":"1030 MASSACHUSETTS AVENUE","street2":null,"city":"CAMBRIDGE","stateOrCountry":"MA","zipCode":"02138","stateOrCountryDescription":"MA","isForeignLocation":0,"foreignStateTerritory":null,"country":null,"countryCode":null},"business":{"street1":"1030 MASSACHUSETTS AVENUE","street2":null,"city":"CAMBRIDGE","stateOrCountry":"MA","zipCode":"02138","stateOrCountryDescription":"MA","isForeignLocation":null,"foreignStateTerritory":null,"country":null,"countryCode":null}},"phone":"(781) 806-6245","flags":"","formerNames":[{"name":"Gazelle Parent, Inc.","from":"2026-04-22T00:00:00.000Z","to":"2026-08-03T00:00:00.000Z"}],"filings":{"recent":{"accessionNumber":["0001193125-26-374729","0001193125-26-352388","0001193125-26-352381","0001172661-26-003281","0001628098-26-000007","0001346824-26-000218","0001388325-26-000037","0001193125-26-335113","0001193125-26-335083","0001193125-26-335082","0001193125-26-335078","0001193125-26-335055","0001193125-26-335045","0001193125-26-331005","0001193125-26-331002","0001193125-26-330998","0001193125-26-330988","0001193125-26-330982","0001193125-26-330979","0001193125-26-330977","0001193125-26-330973","0001193125-26-330881","0001193125-26-330810","0001354457-26-000748","0001193125-26-329768","0001193125-26-329642","9999999995-26-002188","0001193125-26-294834","0001193125-26-293383","0001193125-26-290449","0001193125-26-281076","0001193125-26-253683","0001193125-26-170834"],"filingDate":["2026-08-28","2026-08-14","2026-08-14","2026-08-11","2026-08-10","2026-08-10","2026-08-10","2026-08-05","2026-08-05","2026-08-05","2026-08-05","2026-08-05","2026-08-05","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-07-02","2026-07-02","2026-07-02","2026-06-30","2026-06-24","2026-06-02","2026-04-22"],"reportDate":["","2026-07-31","2026-06-30","","","","","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","2026-08-03","","2026-07-31","","","","","","","","","",""],"acceptanceDateTime":["2026-08-28T17:11:06.000Z","2026-08-14T20:29:52.000Z","2026-08-14T20:28:28.000Z","2026-08-11T20:03:43.000Z","2026-08-10T20:43:38.000Z","2026-08-10T20:23:50.000Z","2026-08-10T20:21:50.000Z","2026-08-05T20:10:43.000Z","2026-08-05T20:08:35.000Z","2026-08-05T20:08:32.000Z","2026-08-05T20:07:43.000Z","2026-08-05T20:06:03.000Z","2026-08-05T20:05:22.000Z","2026-08-03T22:42:44.000Z","2026-08-03T22:41:26.000Z","2026-08-03T22:39:07.000Z","2026-08-03T22:37:04.000Z","2026-08-03T22:35:32.000Z","2026-08-03T22:34:00.000Z","2026-08-03T22:32:46.000Z","2026-08-03T22:29:46.000Z","2026-08-03T21:27:19.000Z","2026-08-03T21:08:10.000Z","2026-08-03T17:30:05.000Z","2026-08-03T14:31:55.000Z","2026-08-03T12:58:15.000Z","2026-07-06T04:15:06.000Z","2026-07-02T20:55:58.000Z","2026-07-02T10:26:23.000Z","2026-06-30T20:01:58.000Z","2026-06-24T20:15:49.000Z","2026-06-02T20:42:48.000Z","2026-04-22T21:19:40.000Z"],"act":["33","34","34","34","34","34","34","","","","","","","","","","","","","","","33","34","34","34","34","33","33","33","33","33","33","33"],"form":["S-1","8-K/A","10-Q","SCHEDULE 13G","SCHEDULE 13G","SCHEDULE 13G","SCHEDULE 13G","4","4","4","4","4","4","3","3","3","3","3","3","3","3","S-8","8-K","CERT","8-A12B/A","8-A12B","EFFECT","424B3","S-4/A","S-4/A","S-4/A","S-4/A","S-4"],"fileNumber":["333-298642","001-43430","001-43430","005-95853","005-95853","005-95853","005-95853","","","","","","","","","","","","","","","333-297941","001-43430","001-43430","001-43430","001-43430","333-295249","333-295249","333-295249","333-295249","333-295249","333-295249","333-295249"],"filmNumber":["261341413","261282431","261282383","261263077","261259140","261258796","261258763","","","","","","","","","","","","","","","261234616","261234319","261231828","261230964","261230613","261153996","261152563","261147668","261140428","261116041","261056902","26884765"],"items":["","9.01","","","","","","","","","","","","","","","","","","","","","1.01,2.01,2.02,3.02,3.03,4.01,5.01,5.02,5.03,7.01,9.01","","","",",,","","","","","",""],"core_type":["XBRL","XBRL","XBRL","SCHEDULE 13G","SCHEDULE 13G","SCHEDULE 13G","SCHEDULE 13G","4","4","4","4","4","4","3","3","3","3","3","3","3","3","S-8","XBRL","CERT","8-A12B/A","8-A12B","EFFECT","424B3","S-4/A","S-4/A","S-4/A","S-4/A","S-4"],"size":[15188901,2516071,1399027,13003,76170,19674,7409,5552,5560,5579,5553,5499,5546,18225,22659,17824,20568,25977,21330,23094,19755,694577,5068664,180866,14782,14242,1718,8244112,8354237,8568871,9808630,9477718,8689562],"isXBRL":[1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,1,0,1],"isInlineXBRL":[1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,1,0,1],"isXBRLNumeric":[1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"primaryDocument":["d127696ds1.htm","obx-20260731.htm","obx-20260630.htm","xslSCHEDULE_13G_X02/primary_doc.xml","xslSCHEDULE_13G_X02/primary_doc.xml","xslSCHEDULE_13G_X02/primary_doc.xml","xslSCHEDULE_13G_X02/primary_doc.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","d105773ds8.htm","d309963d8k.htm","OBX_8A_Cert_0002130606.pdf","d227853d8a12ba.htm","d227853d8a12b.htm","xslEFFECTX01/primary_doc.xml","d117787d424b3.htm","d117787ds4a.htm","d117787ds4a.htm","d117787ds4a.htm","d117787ds4a.htm","d117787ds4.htm"],"primaryDocDescription":["S-1","8-K/A","10-Q","","","","","4","4","4","4","4","4","3","3","3","3","3","3","3","3","S-8","8-K","","8-A12B/A","8-A12B","","424B3","S-4/A","S-4/A NO. 3","S-4/A NO. 2","S-4/A","S-4"]},"files":[]}}