{"cik":"0001811907","entityType":"other","sic":"","sicDescription":"","ownerOrg":"","insiderTransactionForOwnerExists":0,"insiderTransactionForIssuerExists":0,"name":"Citadel Investment Advisory, Inc.","tickers":[],"exchanges":[],"ein":"311492676","lei":null,"description":"","website":"","investorWebsite":"","category":"","fiscalYearEnd":"1231","stateOfIncorporation":"OH","stateOfIncorporationDescription":"OH","addresses":{"mailing":{"street1":"PO BOX 900","street2":null,"city":"CHESTERLAND","stateOrCountry":"OH","zipCode":"44026","stateOrCountryDescription":"OH","isForeignLocation":0,"foreignStateTerritory":null,"country":null,"countryCode":null},"business":{"street1":"PO BOX 900","street2":null,"city":"CHESTERLAND","stateOrCountry":"OH","zipCode":"44026","stateOrCountryDescription":"OH","isForeignLocation":null,"foreignStateTerritory":null,"country":null,"countryCode":null}},"phone":"440-942-8877","flags":"","formerNames":[],"filings":{"recent":{"accessionNumber":["0001811907-26-000005","0001811907-26-000004","0001811907-26-000003","0001811907-26-000002","0001811907-26-000001","0001811907-25-000005","0001811907-25-000003","0001811907-25-000002","0001811907-25-000001","0001811907-24-000004","0001811907-24-000003","0001811907-24-000002","0001811907-24-000001","0001811907-23-000005","0001811907-23-000003","0001811907-23-000002","0001811907-23-000001","0001811907-22-000005","0001811907-22-000003","0001811907-22-000002","0001811907-22-000001","0001811907-21-000008","0001811907-21-000007","0001811907-21-000005","0001811907-21-000001"],"filingDate":["2026-10-15","2026-07-29","2026-07-23","2026-04-16","2026-01-21","2025-10-21","2025-08-05","2025-04-17","2025-01-24","2024-10-16","2024-07-15","2024-04-17","2024-01-23","2023-10-31","2023-07-11","2023-05-01","2023-01-18","2022-10-20","2022-08-02","2022-05-12","2022-01-27","2021-11-02","2021-08-10","2021-04-20","2021-01-29"],"reportDate":["2026-09-30","2026-06-30","2026-06-30","2026-03-31","2025-12-31","2025-09-30","2025-06-30","2025-03-31","2024-12-31","2024-09-30","2024-06-30","2024-03-31","2023-12-31","2023-09-30","2023-06-30","2023-03-31","2022-12-31","2022-09-30","2022-06-30","2022-03-31","2021-12-31","2021-09-30","2021-06-30","2021-03-31","2020-12-31"],"acceptanceDateTime":["2026-10-15T17:30:39.000Z","2026-07-29T16:13:48.000Z","2026-07-23T14:57:29.000Z","2026-04-16T17:09:08.000Z","2026-01-21T17:23:04.000Z","2025-10-21T20:46:31.000Z","2025-08-05T15:17:17.000Z","2025-04-17T15:42:04.000Z","2025-01-24T18:02:38.000Z","2024-10-16T16:37:09.000Z","2024-07-15T13:42:17.000Z","2024-04-17T16:26:13.000Z","2024-01-23T14:50:11.000Z","2023-10-31T17:12:26.000Z","2023-07-11T17:52:47.000Z","2023-05-01T19:47:35.000Z","2023-01-18T18:12:59.000Z","2022-10-20T21:19:25.000Z","2022-08-02T18:38:49.000Z","2022-05-12T14:23:52.000Z","2022-01-27T19:36:04.000Z","2021-11-02T18:39:36.000Z","2021-08-10T18:14:54.000Z","2021-04-20T14:20:21.000Z","2021-01-29T16:34:50.000Z"],"act":["34","34","34","34","34","34","34","34","34","34","34","34","34","34","34","34","34","34","34","34","34","34","34","34","34"],"form":["13F-HR","N-PX","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR"],"fileNumber":["028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492","028-20492"],"filmNumber":["261462534","261215864","261195756","26866517","26545717","251407648","251183472","25845711","25552879","241373974","241116034","24849995","24550714","231363601","231081842","23873291","23533828","221321710","221128180","22916285","22562539","211370535","211159431","21836542","21569504"],"items":["","","","","","","","","","","","","","","","","","","","","","","","",""],"core_type":["13F-HR","N-PX","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR"],"size":[43644,3035,43441,44452,45030,46624,47111,46620,46633,46119,46668,46720,46693,46168,45645,45122,45124,44565,45583,45676,43098,42579,42577,42579,41514],"isXBRL":[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],"isInlineXBRL":[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],"isXBRLNumeric":[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],"primaryDocument":["xslForm13F_X02/primary_doc.xml","xslN-PX_X01/primary_doc.xml","xslForm13F_X02/primary_doc.xml","xslForm13F_X02/primary_doc.xml","xslForm13F_X02/primary_doc.xml","xslForm13F_X02/primary_doc.xml","xslForm13F_X02/primary_doc.xml","xslForm13F_X02/primary_doc.xml","xslForm13F_X02/primary_doc.xml","xslForm13F_X02/primary_doc.xml","xslForm13F_X02/primary_doc.xml","xslForm13F_X02/primary_doc.xml","xslForm13F_X02/primary_doc.xml","xslForm13F_X02/primary_doc.xml","xslForm13F_X02/primary_doc.xml","xslForm13F_X02/primary_doc.xml","xslForm13F_X02/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml"],"primaryDocDescription":["","","","","","","","","","","","","","","","","","","","","","","","",""]},"files":[]}}