{"cik":"0002088256","entityType":"other","sic":"7371","sicDescription":"Services-Computer Programming Services","ownerOrg":"06 Technology","insiderTransactionForOwnerExists":0,"insiderTransactionForIssuerExists":1,"name":"Horizon Quantum Holdings Ltd.","tickers":["HQ","HQWWW"],"exchanges":["Nasdaq","Nasdaq"],"ein":"000000000","lei":null,"description":"","website":"","investorWebsite":"","category":"<br>Emerging growth company","fiscalYearEnd":"1231","stateOfIncorporation":"U0","stateOfIncorporationDescription":"Singapore","addresses":{"mailing":{"street1":"ALICE@MEDIAOPOLIS","street2":"29 MEDIA CIRCLE #05-22","city":"SINGAPORE","stateOrCountry":null,"zipCode":"138565","stateOrCountryDescription":null,"isForeignLocation":1,"foreignStateTerritory":null,"country":"Singapore","countryCode":"U0"},"business":{"street1":"ALICE@MEDIAOPOLIS","street2":"29 MEDIA CIRCLE #05-22","city":"SINGAPORE","stateOrCountry":null,"zipCode":"138565","stateOrCountryDescription":null,"isForeignLocation":1,"foreignStateTerritory":null,"country":"Singapore","countryCode":"U0"}},"phone":"6581015024","flags":"","formerNames":[{"name":"Horizon Quantum Holdings Pte. Ltd.","from":"2026-01-12T05:00:00.000Z","to":"2026-03-09T04:00:00.000Z"},{"name":"Rose Holdco Pte. Ltd.","from":"2025-10-14T04:00:00.000Z","to":"2025-12-09T05:00:00.000Z"}],"filings":{"recent":{"accessionNumber":["0002141719-26-000003","0001104659-26-077879","0001213900-26-062145","0001213900-26-054525","0001213900-26-052179","0001213900-26-051632","0001213900-26-047285","9999999995-26-001318","0001213900-26-046230","0001213900-26-046213","0000000000-26-003999","0001213900-26-044735","0001213900-26-044199","0001213900-26-043627","0001213900-26-043585","0001213900-26-041727","0001213900-26-038871","0000950142-26-001035","0001213900-26-036909","0001213900-26-034272","0001213900-26-034087","0001213900-26-034065","0001213900-26-034058","0000950103-26-004607","0001213900-26-033688","0001829126-26-002590","0001829126-26-002587","0001829126-26-002585","0001213900-26-031954","0001213900-26-031955","0001213900-26-031953","0001213900-26-031952","0001213900-26-031951","0001213900-26-031930","0001354457-26-000270","0001213900-26-031619","0001213900-26-026232","0001213900-26-025528","0001213900-26-025448","0001213900-26-025293","0001213900-26-025016","0001213900-26-024975","0001213900-26-024971","0001213900-26-024970","0001213900-26-024966","0001213900-26-024748","9999999995-26-000609","0001213900-26-017455","0001213900-26-009801","0001213900-26-007873","0001213900-26-005428","0001213900-26-004420","0001213900-26-003252","0001213900-25-119427","0001213900-25-118468","0001213900-25-117618","0001213900-25-101214","0001213900-25-100898","0001213900-25-098707"],"filingDate":["2026-07-09","2026-06-25","2026-05-28","2026-05-11","2026-05-05","2026-05-04","2026-04-24","2026-04-23","2026-04-21","2026-04-21","2026-04-20","2026-04-16","2026-04-16","2026-04-14","2026-04-14","2026-04-09","2026-04-02","2026-04-01","2026-03-31","2026-03-25","2026-03-25","2026-03-25","2026-03-25","2026-03-25","2026-03-24","2026-03-20","2026-03-20","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","2026-03-11","2026-03-10","2026-03-10","2026-03-10","2026-03-09","2026-03-09","2026-03-09","2026-03-09","2026-03-09","2026-03-06","2026-02-17","2026-02-17","2026-01-30","2026-01-27","2026-01-20","2026-01-14","2026-01-12","2025-12-09","2025-12-05","2025-12-03","2025-10-22","2025-10-21","2025-10-14"],"reportDate":["","","","2026-05-11","2026-05-05","2026-05-04","","","","","","","2026-04-16","","2025-12-31","2026-04-09","2026-03-19","","","2026-03-19","2026-03-19","2026-03-19","2026-03-19","","2026-03-19","","2026-03-19","2026-03-19","2026-03-19","2026-03-19","2026-03-19","2026-03-19","2026-03-19","2026-03-19","","","","","","","","","","","","","","","","","","","","","","","","",""],"acceptanceDateTime":["2026-07-09T21:17:49.000Z","2026-06-25T23:13:16.000Z","2026-05-28T20:25:40.000Z","2026-05-11T20:45:02.000Z","2026-05-05T20:05:18.000Z","2026-05-04T20:30:01.000Z","2026-04-24T13:05:17.000Z","2026-04-24T04:15:23.000Z","2026-04-21T20:45:01.000Z","2026-04-21T20:30:30.000Z","2026-04-20T19:03:55.000Z","2026-04-16T21:16:45.000Z","2026-04-15T22:46:28.000Z","2026-04-14T21:22:26.000Z","2026-04-14T20:50:16.000Z","2026-04-09T11:05:37.000Z","2026-04-02T12:15:09.000Z","2026-04-02T01:34:31.000Z","2026-03-31T12:22:13.000Z","2026-03-25T23:01:28.000Z","2026-03-25T20:21:12.000Z","2026-03-25T20:10:04.000Z","2026-03-25T20:07:33.000Z","2026-03-25T10:19:39.000Z","2026-03-24T22:30:09.000Z","2026-03-20T20:40:21.000Z","2026-03-20T20:35:39.000Z","2026-03-20T20:30:25.000Z","2026-03-19T21:25:07.000Z","2026-03-19T21:25:06.000Z","2026-03-19T21:25:04.000Z","2026-03-19T21:25:03.000Z","2026-03-19T21:25:02.000Z","2026-03-19T21:00:10.000Z","2026-03-19T20:04:25.000Z","2026-03-19T14:25:01.000Z","2026-03-11T21:22:41.000Z","2026-03-10T15:08:32.000Z","2026-03-10T12:44:25.000Z","2026-03-09T22:38:05.000Z","2026-03-09T15:02:17.000Z","2026-03-09T13:26:26.000Z","2026-03-09T13:24:34.000Z","2026-03-09T13:23:40.000Z","2026-03-09T13:19:55.000Z","2026-03-06T21:56:47.000Z","2026-02-18T05:15:29.000Z","2026-02-17T22:03:57.000Z","2026-01-30T02:24:04.000Z","2026-01-27T01:45:10.000Z","2026-01-20T14:29:40.000Z","2026-01-14T22:17:03.000Z","2026-01-12T18:28:22.000Z","2025-12-09T11:20:49.000Z","2025-12-05T12:58:02.000Z","2025-12-03T14:44:22.000Z","2025-10-22T20:05:26.000Z","2025-10-21T21:17:42.000Z","2025-10-20T15:30:37.000Z"],"act":["34","34","33","","34","34","33","33","","NE","","33","34","33","34","34","","34","34","","","","34","34","","34","","","","","","","","34","34","34","","","","","","","","","","33","33","33","33","","","33","","","","","","33",""],"form":["SCHEDULE 13D","SCHEDULE 13G","S-8","3","6-K","6-K","424B3","EFFECT","CORRESP","AW","UPLOAD","F-1","6-K","POS AM","20-F","6-K","3","SCHEDULE 13D","SCHEDULE 13D","4","4","4","20-F","SCHEDULE 13G","4","SCHEDULE 13D","4","3","3","3","3","3","3","6-K","CERT","8-A12B","425","425","425","425","425","425","425","425","425","424B3","EFFECT","424B3","F-4/A","425","425","F-4","425","425","425","425","425","DRS","425"],"fileNumber":["005-95574","005-95574","333-296310","","001-43203","001-43203","333-295110","333-295110","","333-292737","333-295110","333-295110","001-43203","333-292737","001-43203","001-43203","","005-95574","005-95574","","","","001-43203","005-95574","","005-95574","","","","","","","","001-43203","001-43203","001-43203","","","","","","","","","","333-292737","333-292737","333-292737","333-292737","","","333-292737","","","","","","377-08595",""],"filmNumber":["261166398","261123506","261036425","","26942940","26938169","26890706","26890292","","26879921","","26868524","26865256","26861759","26861396","26849794","","26830373","26817191","","","","26792474","26788274","","26778764","","","","","","","","26775029","26774182","26772775","","","","","","","","","","26731921","26645193","26643302","26580204","","","26533969","","","","","","251407956",""],"items":["","","","","","","",",,","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","",",,","","","","","","","","","","","",""],"core_type":["SCHEDULE 13D","SCHEDULE 13G","S-8","3","6-K","6-K","424B3","EFFECT","CORRESP","AW","LETTER","XBRL","6-K","XBRL","XBRL","6-K","3","SCHEDULE 13D","SCHEDULE 13D","4","4","4","20-F","SCHEDULE 13G","4","SCHEDULE 13D","4","3","3","3","3","3","3","6-K","CERT","8-A12B","425","425","425","425","425","425","425","425","425","424B3","EFFECT","424B3","F-4/A","425","425","F-4","425","425","425","425","425","DRS","425"],"size":[26641,18551,507567,3623,205802,18412,2744308,2104,6643,13554,150354,8560966,40952,2587873,4117044,26071,3484,15913,119618,6356,7475,7784,3284165,13226,6524,132432,10102,5063,3345,3354,3398,4595,3547,24830,114302,21246,61497,69507,107117,75596,27534,94443,69207,94058,68927,1347744,2944,30190528,25318277,36358,105600,25562848,24427807,28563,336356,72673,54509,24067618,152129971],"isXBRL":[0,0,1,0,0,0,0,0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0],"isInlineXBRL":[0,0,1,0,0,0,0,0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0],"isXBRLNumeric":[0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,null,null,null,null,null,null,null,null,null,null,null,null,null,null,0,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null],"primaryDocument":["xslSCHEDULE_13D_X02/primary_doc.xml","xslSCHEDULE_13G_X02/primary_doc.xml","ea0291676-s8_horizon.htm","xslF345X06/ownership.xml","ea0288941-6k_horizon.htm","ea0288728-6k_horizon.htm","ea0287238-424b3_horizon.htm","xslEFFECTX01/primary_doc.xml","filename1.htm","ea028719702-aw_horizon.htm","filename1.pdf","ea0285766-f1_horizon.htm","ea0286478-6k_horizon.htm","ea0284873-posam1_horizon.htm","ea0285038-20f_horizon.htm","ea0285686-6k_horizon.htm","xslF345X06/ownership.xml","xslSCHEDULE_13D_X02/primary_doc.xml","xslSCHEDULE_13D_X02/primary_doc.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","xslF345X06/ownership.xml","ea0282908-20f_horizon.htm","xslSCHEDULE_13G_X02/primary_doc.xml","xslF345X06/ownership.xml","xslSCHEDULE_13D_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","ea0282633-6k_horizon.htm","HQ_8A_Cert_0002088256.pdf","ea0282068-8a12b_horizon.htm","ea028111601-425_horizon.htm","ea0280765-425_horizon.htm","ea0280741-425_horizon.htm","ea028065401-425_horizon.htm","ea0280570-425_horizon.htm","ea028054502-425_horizon.htm","ea028051802-425_horizon.htm","ea0280545-425_horizon.htm","ea0280518-425_horizon.htm","ea028015001-424b3_horizon.htm","xslEFFECTX01/primary_doc.xml","ea0261018-07.htm","ea0261018-05.htm","ea0274136-425_horizon.htm","ea027329002-425_horizon.htm","ea0261018-03.htm","ea027254201-425_horizon.htm","ea0268961-425_rosehold.htm","ea026862702-425_rose.htm","ea026830402-425_rose.htm","ea026209902-425_rose.htm","filename1.htm","ea0261155-425_rose.htm"],"primaryDocDescription":["","","REGISTRATION STATEMENT","","REPORT OF FOREIGN PRIVATE ISSUER","REPORT OF FOREIGN PRIVATE ISSUER","PROSPECTUS","","","AMENDMENT WITHDRAWAL","","REGISTRATION STATEMENT","REPORT OF FOREIGN PRIVATE ISSUER","POSE EFFECTIVE AMENDMENT NO. 1 TO FORM F-4","ANNUAL REPORT","REPORT OF FOREIGN PRIVATE ISSUER","","","","","","","SHELL COMPANY REPORT","","","","FORM 4","FORM 3","","","","","","REPORT OF FOREIGN PRIVATE ISSUER","","FOR REGISTRATION OF CERTAIN CLASSES","FORM 425","FORM 425","FORM 425","FORM 425","FORM 425","FORM 425","FORM 425","FORM 425","FORM 425","PROSPECTUS SUPPLEMENT","","PROSPECTUS","REGISTRATION STATEMENT","FORM 425","FORM 425","REGISTRATION STATEMENT","FORM 425","FORM 425","FORM 425","FORM 425","FORM 425","","FORM 425"]},"files":[]}}