{"cik":"0002082847","entityType":"operating","sic":"6770","sicDescription":"Blank Checks","ownerOrg":"05 Real Estate & Construction","insiderTransactionForOwnerExists":0,"insiderTransactionForIssuerExists":1,"name":"Blue Water Acquisition Corp. IV","tickers":["BWIV","BWIV-UN","BWIV-WT"],"exchanges":["NYSE","NYSE","NYSE"],"ein":"000000000","lei":null,"description":"","website":"","investorWebsite":"","category":"Non-accelerated filer<br>Smaller reporting company<br>Emerging growth company","fiscalYearEnd":"1231","stateOfIncorporation":"E9","stateOfIncorporationDescription":"Cayman Islands","addresses":{"mailing":{"street1":"15 E. PUTNAM AVENUE","street2":"SUITE 363","city":"GREENWICH","stateOrCountry":"CT","zipCode":"06830","stateOrCountryDescription":"CT","isForeignLocation":0,"foreignStateTerritory":null,"country":null,"countryCode":null},"business":{"street1":"15 E. PUTNAM AVENUE","street2":"SUITE 363","city":"GREENWICH","stateOrCountry":"CT","zipCode":"06830","stateOrCountryDescription":"CT","isForeignLocation":null,"foreignStateTerritory":null,"country":null,"countryCode":null}},"phone":"646-303-0737","flags":"","formerNames":[],"filings":{"recent":{"accessionNumber":["0001493152-26-023797","0001493152-26-023125","0001104659-26-059870","0000919574-26-002921","0001493152-26-021409","0001493152-26-019397","0001493152-26-019396","0001493152-26-016941","0001844495-26-000016","0001493152-26-013223","0001493152-26-012684","0001493152-26-012369","0001493152-26-012371","0001493152-26-012069","0001493152-26-011903","9999999995-26-000869","0001493152-26-011667","0001493152-26-011666","0001493152-26-011668","0001493152-26-011665","0001493152-26-011664","0000876661-26-000260","0001493152-26-011575","0001493152-26-010620","0001493152-26-010618","0001493152-26-009583","0001493152-26-007866","0000000000-26-000578","0001493152-25-026347"],"filingDate":["2026-05-15","2026-05-14","2026-05-13","2026-05-13","2026-05-06","2026-04-28","2026-04-28","2026-04-15","2026-04-09","2026-03-27","2026-03-25","2026-03-24","2026-03-24","2026-03-23","2026-03-20","2026-03-19","2026-03-19","2026-03-19","2026-03-19","2026-03-19","2026-03-19","2026-03-19","2026-03-19","2026-03-17","2026-03-17","2026-03-11","2026-02-24","2026-01-15","2025-12-05"],"reportDate":["2026-03-31","2026-05-09","","","2026-05-06","","2026-04-28","","","2026-03-23","2026-03-19","2026-03-23","2026-03-23","2026-03-19","","","2026-03-19","2026-03-19","2026-03-19","2026-03-19","2026-03-19","","","","","","","",""],"acceptanceDateTime":["2026-05-15T20:16:17.000Z","2026-05-14T20:31:20.000Z","2026-05-13T13:29:04.000Z","2026-05-13T13:09:55.000Z","2026-05-06T12:30:28.000Z","2026-04-28T21:21:10.000Z","2026-04-28T21:20:37.000Z","2026-04-16T00:17:07.000Z","2026-04-09T20:43:18.000Z","2026-03-27T20:30:23.000Z","2026-03-25T20:30:23.000Z","2026-03-24T20:30:18.000Z","2026-03-24T20:30:06.000Z","2026-03-23T12:26:49.000Z","2026-03-20T20:55:15.000Z","2026-03-20T04:15:03.000Z","2026-03-19T21:11:55.000Z","2026-03-19T21:11:54.000Z","2026-03-19T21:11:53.000Z","2026-03-19T21:11:51.000Z","2026-03-19T21:11:50.000Z","2026-03-19T17:29:08.000Z","2026-03-19T16:42:26.000Z","2026-03-17T21:23:43.000Z","2026-03-17T21:21:35.000Z","2026-03-10T21:46:25.000Z","2026-02-24T19:36:54.000Z","2026-01-15T20:36:11.000Z","2025-12-05T20:55:40.000Z"],"act":["34","34","34","34","34","34","34","34","34","34","34","","","","33","33","","","","","","34","34","","","33","33","","33"],"form":["10-Q","8-K","SCHEDULE 13G","SCHEDULE 13G","8-K","425","8-K","SCHEDULE 13G","SCHEDULE 13G","8-K","8-K","4","4","3","424B4","EFFECT","3","3","3","3","3","CERT","8-A12B","CORRESP","CORRESP","S-1/A","S-1/A","UPLOAD","S-1"],"fileNumber":["001-43204","001-43204","005-95609","005-95609","001-43204","001-43204","001-43204","005-95609","005-95609","001-43204","001-43204","","","","333-291959","333-291959","","","","","","001-43204","001-43204","","","333-291959","333-291959","333-291959","333-291959"],"filmNumber":["26987804","26979613","26971327","26971221","26945939","26909307","26909304","26865364","26852158","26807862","26792862","","","","26778910","26775973","","","","","","26773503","26773320","","","26740747","26670834","","251552804"],"items":["","5.02,9.01","","","8.01,9.01","","7.01,9.01","","","8.01,9.01","1.01,3.02,5.02,5.03,8.01,9.01","","","","",",,","","","","","","","","","","","","",""],"core_type":["XBRL","XBRL","SCHEDULE 13G","SCHEDULE 13G","XBRL","425","XBRL","SCHEDULE 13G","SCHEDULE 13G","XBRL","XBRL","4","4","3","424B4","EFFECT","3","3","3","3","3","CERT","8-A12B","CORRESP","CORRESP","XBRL","XBRL","LETTER","XBRL"],"size":[4124989,273859,27460,16230,276076,78313,323445,23212,10087,458137,2266568,8044,8428,3179,2537849,1769,5104,3104,3115,3101,4779,467482,29679,13557,17970,6466383,6261881,40084,7344463],"isXBRL":[1,1,0,0,1,0,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,1],"isInlineXBRL":[1,1,0,0,1,0,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,1],"isXBRLNumeric":[1,0,0,0,0,0,0,0,0,null,null,null,null,null,null,null,null,null,null,null,null,null,null,0,0,null,null,0,null],"primaryDocument":["form10-q.htm","form8-k.htm","xslSCHEDULE_13G_X02/primary_doc.xml","xslSCHEDULE_13G_X02/primary_doc.xml","form8-k.htm","form425.htm","form8-k.htm","xslSCHEDULE_13G_X02/primary_doc.xml","xslSCHEDULE_13G_X02/primary_doc.xml","form8-k.htm","form8-k.htm","xslF345X06/ownership.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","form424b4.htm","xslEFFECTX01/primary_doc.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","BWIV031926.pdf","form8a-12b.htm","filename1.htm","filename1.htm","forms-1a.htm","forms-1a.htm","filename1.pdf","forms-1.htm"],"primaryDocDescription":["10-Q","8-K","","","8-K","425","8-K","","","8-K","8-K","4","4","3","424B4","","3","3","3","3","3","NYSE CERTIFICATION","8-A12B","","","S-1/A","S-1/A","","S-1"]},"files":[]}}