{"cik":"0002086587","entityType":"operating","sic":"3760","sicDescription":"Guided Missiles & Space Vehicles & Parts","ownerOrg":"04 Manufacturing","insiderTransactionForOwnerExists":0,"insiderTransactionForIssuerExists":1,"name":"York Space Systems Inc.","tickers":["YSS"],"exchanges":["NYSE"],"ein":"000000000","lei":null,"description":"","website":"","investorWebsite":"","category":"
Emerging growth company","fiscalYearEnd":"1231","stateOfIncorporation":"DE","stateOfIncorporationDescription":"DE","addresses":{"mailing":{"street1":"6060 S WILLOW DR.","street2":null,"city":"GREENWOOD VILLAGE","stateOrCountry":"CO","zipCode":"80111","stateOrCountryDescription":"CO","isForeignLocation":0,"foreignStateTerritory":null,"country":null,"countryCode":null},"business":{"street1":"6060 S WILLOW DR.","street2":null,"city":"GREENWOOD VILLAGE","stateOrCountry":"CO","zipCode":"80111","stateOrCountryDescription":"CO","isForeignLocation":null,"foreignStateTerritory":null,"country":null,"countryCode":null}},"phone":"720-537-2655","flags":"","formerNames":[{"name":"Yellowstone Midco Holdings II, LLC","from":"2025-09-29T04:00:00.000Z","to":"2026-02-03T05:00:00.000Z"}],"filings":{"recent":{"accessionNumber":["0001104659-26-082651","0001104659-26-078815","0001104659-26-070964","0001628280-26-040636","0001628280-26-036161","0001193125-26-226640","0001104659-26-061907","0001628280-26-035244","0001628280-26-035132","0002052113-26-000444","0001628280-26-028144","0001193125-26-155170","0001193125-26-155140","0001193125-26-155061","0001628280-26-019923","0001628280-26-019813","0001193125-26-102697","0001193125-26-098975","0001193125-26-036420","0001193125-26-036415","0001193125-26-036413","0001193125-26-036408","0001193125-26-036405","0001193125-26-036403","0001193125-26-036401","0001193125-26-036398","0001193125-26-036396","0001193125-26-036395","0001193125-26-036394","0001193125-26-036389","0001193125-26-035886","0001193125-26-032056","0001193125-26-031773","0001193125-26-030469","0001193125-26-029988","0001193125-26-029962","0001193125-26-029955","0001193125-26-029949","0001193125-26-029945","0001193125-26-029943","0001193125-26-029940","0001193125-26-029938","0001193125-26-029936","0001193125-26-029932","0001193125-26-029927","0001193125-26-029756","0000876661-26-000064","0001193125-26-028089","9999999995-26-000326","0001193125-26-027787","0000000000-26-000897","0001193125-26-022108","0001193125-26-022102","0001193125-26-021633","0001193125-26-021630","0001193125-26-015457","0001193125-26-015413","0000000000-26-000384","0001193125-25-318605","0001193125-25-318602","0000000000-25-011370","0001193125-25-284187","0001193125-25-221534"],"filingDate":["2026-07-10","2026-06-29","2026-06-05","2026-06-04","2026-05-19","2026-05-15","2026-05-15","2026-05-15","2026-05-14","2026-04-29","2026-04-29","2026-04-14","2026-04-14","2026-04-14","2026-03-20","2026-03-19","2026-03-11","2026-03-10","2026-02-03","2026-02-03","2026-02-03","2026-02-03","2026-02-03","2026-02-03","2026-02-03","2026-02-03","2026-02-03","2026-02-03","2026-02-03","2026-02-03","2026-02-03","2026-01-30","2026-01-30","2026-01-30","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-28","2026-01-28","2026-01-27","2026-01-26","2026-01-26","2026-01-26","2026-01-26","2026-01-16","2026-01-16","2026-01-13","2025-12-15","2025-12-15","2025-12-08","2025-11-17","2025-09-29"],"reportDate":["2026-07-08","2026-06-04","2026-06-04","2026-05-15","2026-05-15","","","2026-03-31","2026-05-14","","2026-04-29","2026-04-10","2026-04-10","2026-04-10","2025-12-31","2026-03-19","2026-01-30","2026-03-06","2026-01-30","2026-01-30","2026-01-30","2026-01-30","2026-01-30","2026-01-30","2026-01-30","2026-01-30","2026-01-30","2026-01-30","2026-01-30","2026-01-29","2026-01-30","","2026-01-28","","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","2026-01-29","","","","","","","","","","","","","","","","",""],"acceptanceDateTime":["2026-07-10T20:05:18.000Z","2026-06-29T20:05:14.000Z","2026-06-05T20:05:16.000Z","2026-06-04T12:52:18.000Z","2026-05-19T12:47:59.000Z","2026-05-15T20:05:07.000Z","2026-05-15T12:45:44.000Z","2026-05-14T22:09:42.000Z","2026-05-14T20:20:25.000Z","2026-04-29T20:06:30.000Z","2026-04-29T13:06:03.000Z","2026-04-14T21:35:51.000Z","2026-04-14T21:29:35.000Z","2026-04-14T21:00:25.000Z","2026-03-19T22:47:41.000Z","2026-03-19T20:17:04.000Z","2026-03-11T23:56:33.000Z","2026-03-09T23:07:02.000Z","2026-02-04T02:06:58.000Z","2026-02-04T02:04:13.000Z","2026-02-04T02:03:19.000Z","2026-02-04T02:01:02.000Z","2026-02-04T02:00:22.000Z","2026-02-04T01:59:43.000Z","2026-02-04T01:58:35.000Z","2026-02-04T01:56:45.000Z","2026-02-04T01:56:37.000Z","2026-02-04T01:55:48.000Z","2026-02-04T01:55:07.000Z","2026-02-04T01:52:32.000Z","2026-02-03T22:22:32.000Z","2026-01-30T22:14:51.000Z","2026-01-30T21:05:36.000Z","2026-01-30T11:59:45.000Z","2026-01-30T02:49:08.000Z","2026-01-30T02:10:51.000Z","2026-01-30T02:07:15.000Z","2026-01-30T02:02:27.000Z","2026-01-30T02:00:25.000Z","2026-01-30T01:58:54.000Z","2026-01-30T01:56:53.000Z","2026-01-30T01:55:05.000Z","2026-01-30T01:52:07.000Z","2026-01-30T01:50:37.000Z","2026-01-30T01:48:38.000Z","2026-01-29T22:59:09.000Z","2026-01-29T11:21:19.000Z","2026-01-29T11:08:32.000Z","2026-01-29T05:15:11.000Z","2026-01-29T00:21:56.000Z","2026-01-27T21:03:48.000Z","2026-01-26T16:48:11.000Z","2026-01-26T16:46:17.000Z","2026-01-26T11:33:18.000Z","2026-01-26T11:31:07.000Z","2026-01-16T21:39:01.000Z","2026-01-16T21:25:00.000Z","2026-01-13T17:36:10.000Z","2025-12-15T14:22:22.000Z","2025-12-15T14:20:20.000Z","2025-12-08T16:36:09.000Z","2025-11-17T16:35:49.000Z","2025-09-29T10:59:32.000Z"],"act":["","","","34","34","34","34","34","34","34","34","","","34","34","34","","34","","","","","","","","","","","","","","33","34","33","","","","","","","","","","","","","34","34","33","33","","","","","33","","33","","","33","","33","33"],"form":["4","4/A","4","8-K/A","8-K","SCHEDULE 13G","SCHEDULE 13G","10-Q","8-K","SCHEDULE 13G","8-K","4","3","8-K","10-K","8-K","4/A","8-K","4","4","4","4","4","4","4","4","4","4","4","3","4","S-8","8-K","424B4","3","3","3","3","3","3","3","3","3","3","3","3","CERT","8-A12B","EFFECT","S-1MEF","UPLOAD","CORRESP","CORRESP","CORRESP","S-1/A","CORRESP","S-1/A","UPLOAD","CORRESP","S-1/A","UPLOAD","S-1","DRS"],"fileNumber":["","","","001-43088","001-43088","005-95639","005-95639","001-43088","001-43088","005-95639","001-43088","","","001-43088","001-43088","001-43088","","001-43088","","","","","","","","","","","","","","333-293104","001-43088","333-291581","","","","","","","","","","","","","001-43088","001-43088","333-291581","333-293028","377-08518","","","","333-291581","","333-291581","377-08518","","333-291581","377-08518","333-291581","377-08518"],"filmNumber":["","","","261063334","26996010","26986963","26982656","26981043","26979309","26915901","26910818","","","26861503","26775587","26774451","","26736627","","","","","","","","","","","","","","26584532","26583362","26580507","","","","","","","","","","","","","26574591","26574557","26574501","26574119","","","","","26558377","","26539782","","","251570202","","251489991","251352064"],"items":["","","","3.02","3.02","","","","2.02,9.01","","1.01,3.02,9.01","","","5.02","","2.02,9.01","","3.02","","","","","","","","","","","","","","","1.01,3.03,5.02,5.03,9.01","","","","","","","","","","","","","","","",",,","","","","","","","","","","","","","",""],"core_type":["4","4/A","4","XBRL","XBRL","SCHEDULE 13G","SCHEDULE 13G","XBRL","XBRL","SCHEDULE 13G","XBRL","4","3","XBRL","10-K","XBRL","4/A","XBRL","4","4","4","4","4","4","4","4","4","4","4","3","4","S-8","XBRL","424B4","3","3","3","3","3","3","3","3","3","3","3","3","CERT","8-A12B","EFFECT","S-1MEF","LETTER","CORRESP","CORRESP","CORRESP","S-1/A","CORRESP","S-1/A","LETTER","CORRESP","S-1/A","LETTER","S-1","DRS"],"size":[10347,22439,19745,153397,154874,7399,17282,7425898,400471,10675,1499074,4708,17704,143170,2152345,504393,4919,137224,4579,6037,5240,4551,4544,5947,6192,4494,4596,5285,4604,16298,7589,197485,1400024,4956826,8199,16987,17188,15337,15991,15392,16273,16268,16416,16397,19416,6462,383715,14480,1752,164799,61039,10534,16868,78151,5043046,41587,6826978,46988,98772,4915830,75009,6215835,3066115],"isXBRL":[0,0,0,1,1,0,0,1,1,0,1,0,0,1,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,1,0],"isInlineXBRL":[0,0,0,1,1,0,0,1,1,0,1,0,0,1,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,1,0],"isXBRLNumeric":[0,0,0,0,0,0,0,1,0,0,0,0,0,0,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,null,null,null,null,null,null,null,null,0,0,0,0,null,0,null,0,0,null,0,null,null],"primaryDocument":["xslF345X06/tm2620027-1_4seq1.xml","xslF345X06/tm2618569-1_4aseq1.xml","xslF345X06/tm2616736-1_4seq1.xml","yss-20260515.htm","yss-20260515.htm","xslSCHEDULE_13G_X02/primary_doc.xml","xslSCHEDULE_13G_X02/primary_doc.xml","yss-20260331.htm","yss-20260514.htm","xslSCHEDULE_13G_X02/primary_doc.xml","yss-20260429.htm","xslF345X06/ownership.xml","xslF345X06/ownership.xml","d72351d8k.htm","yorkspacesystemsinc10-k.htm","yss-20260319.htm","xslF345X05/ownership.xml","d82262d8k.htm","xslF345X05/ownership.xml","xslF345X05/ownership.xml","xslF345X05/ownership.xml","xslF345X05/ownership.xml","xslF345X05/ownership.xml","xslF345X05/ownership.xml","xslF345X05/ownership.xml","xslF345X05/ownership.xml","xslF345X05/ownership.xml","xslF345X05/ownership.xml","xslF345X05/ownership.xml","xslF345X02/ownership.xml","xslF345X05/ownership.xml","d86691ds8.htm","d22484d8k.htm","d941199d424b4.htm","xslF345X02/ownership.xml","xslF345X02/ownership.xml","xslF345X02/ownership.xml","xslF345X02/ownership.xml","xslF345X02/ownership.xml","xslF345X02/ownership.xml","xslF345X02/ownership.xml","xslF345X02/ownership.xml","xslF345X02/ownership.xml","xslF345X02/ownership.xml","xslF345X02/ownership.xml","xslF345X02/ownership.xml","YSS012926.pdf","d83874d8a12b.htm","xslEFFECTX01/primary_doc.xml","d30020ds1mef.htm","filename1.pdf","filename1.htm","filename1.htm","filename1.htm","d941199ds1a.htm","filename1.htm","d941199ds1a.htm","filename1.pdf","filename1.htm","d941199ds1a.htm","filename1.pdf","d941199ds1.htm","filename1.htm"],"primaryDocDescription":["OWNERSHIP DOCUMENT","OWNERSHIP DOCUMENT","OWNERSHIP DOCUMENT","8-K/A","8-K","","","10-Q","8-K","","8-K","4","3","8-K","10-K","8-K","4/A","8-K","4","4","4","4","4","4","4","4","4","4","4","3","4","S-8","8-K","424B4","3","3","3","3","3","3","3","3","3","3","3","3","NYSE CERTIFICATION","8-A12B","","S-1MEF","","","","","S-1/A","","S-1/A","","","S-1/A","","S-1",""]},"files":[]}}