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Resolve candidates before retrying."}}}},"/securities/resolve":{"get":{"operationId":"securities","tags":["Identity"],"summary":"Resolve a dated security identifier","description":"Resolve a ticker, CUSIP or CINS at as_of. Returns query, status and compact security matches with issuer, share class, stable IDs and nullable share_class_figi. Status is resolved, ambiguous or not_found. Omitted as_of means today; future dates are rejected. An assignment continues until a recorded change, end or conflict; dates before the first known assignment are not filled.","parameters":[{"name":"scheme","in":"query","required":true,"description":"Typed security identifier: ticker, cusip or cins. 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Resolve candidates before retrying."}}}},"/securities/{public_id}":{"get":{"operationId":"security","tags":["Identity"],"summary":"Inspect a security","description":"Security details, issuer, share class and nullable share_class_figi. Duplicate and retired handles stay inspectable; duplicates include canonical_public_id.","parameters":[{"name":"public_id","in":"path","required":true,"description":"Stable sec_ public handle returned by security resolution.","schema":{"type":"string"}}],"responses":{"200":{"description":"Success. 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Resolve candidates before retrying."}}}},"/entities/resolve":{"get":{"operationId":"entities","tags":["Identity"],"summary":"Resolve a CIK","description":"Resolve a SEC CIK to an entity or person and their securities and listings. A company can issue several distinct securities, each with its own public_id and nullable share_class_figi.","parameters":[{"name":"cik","in":"query","required":true,"description":"SEC CIK, with or without leading zeroes. For the filing index this matches the filing's primary CIK, not all involved parties.","schema":{"type":"string"}}],"responses":{"200":{"description":"Success. 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Resolve candidates before retrying."}}}},"/ownership/transactions":{"get":{"operationId":"transactions","tags":["Insider ownership"],"summary":"List transactions","description":"One row per disclosed transaction with SEC source locator, reporting-owner roles and inline field footnotes. value is shares × price; reported_value is the separate disclosed total. Sorted by publication descending, then transaction ID. as_of filters SEC acceptance and resolves the ticker on that UTC date. Use entity_id to query a known issuer independently of ticker history.","parameters":[{"name":"ticker","in":"query","required":false,"description":"Ticker shortcut. Resolve first when identity is ambiguous; historical queries require observed listing history.","schema":{"type":"string"}},{"name":"exchange","in":"query","required":false,"description":"Optional exchange filter with ticker, for example Nasdaq. 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(\"Berkshire\"). As Berkshire is in the chain of ownership of this subsidiary, it may be deemed presently to both beneficially own and have a pecuniary interest in all shares of Common Stock presently owned by the subsidiary. Warren E. Buffett, as the controlling stockholder of Berkshire, may be deemed presently to beneficially own, but only to the extent he has a pecuniary interest in, the shares of Common Stock presently owned by the subsidiary. Mr. Buffett disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"14,973,608 of the total reported securities are owned by the following pension plans of Berkshire's subsidiaries: BNSF Master Retirement Trust (4,441,520) and Berkshire Hathaway Inc. 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Resolve candidates before retrying."}}}},"/entities/{entity_id}/ownership/transactions":{"get":{"operationId":"entity_transactions","tags":["Insider ownership"],"summary":"List issuer transactions","description":"The same transaction representation, scoped to a stable issuer identity. Security classes remain separate in each row; name and ticker changes do not change the issuer ID.","parameters":[{"name":"entity_id","in":"path","required":true,"description":"Stable Tapewire organization ID from an entity or ticker resolution. Not a CIK or ticker.","schema":{"type":"string"}},{"name":"owner_id","in":"query","required":false,"description":"Stable Tapewire reporting-owner ID. Matches any owner jointly reporting the transaction; does not allocate the amount to that owner.","schema":{"type":"string"}},{"name":"kind","in":"query","required":false,"description":"purchase, sale, grant, exercise, tax_withholding, gift, disposition_to_issuer, or other. Purchase/sale can include private transactions.","schema":{"type":"string"}},{"name":"from","in":"query","required":false,"description":"Inclusive transaction date, YYYY-MM-DD. This is not the publication date.","schema":{"type":"string"}},{"name":"to","in":"query","required":false,"description":"Inclusive transaction date, YYYY-MM-DD.","schema":{"type":"string"}},{"name":"as_of","in":"query","required":false,"description":"ISO 8601 timestamp with timezone and up to six fractional digits, or YYYY-MM-DD. Invalid dates and nonscalar values return 400. Identity lookups use its UTC date, defaulting to today; filing queries use the acceptance cutoff (end of day for a date).","schema":{"type":"string"}},{"name":"limit","in":"query","required":false,"description":"Page size. 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Rows are under transactions.","content":{"application/json":{"schema":{"type":"object","properties":{"transactions":{"type":"array","items":{"type":"object","properties":{"id":{"type":"integer"},"issuer":{"type":"object","properties":{"id":{"type":"integer"},"kind":{"type":"string"},"name":{"type":"string"},"symbol":{"type":"string"}},"additionalProperties":true},"owners":{"type":"array","items":{"type":"object","properties":{"id":{"type":"integer"},"kind":{"type":"string"},"name":{"type":"string"},"position":{"type":"integer"},"cik":{"type":"string"},"reported_name":{"type":"string"},"relationship":{"type":"object","properties":{"director":{"type":"boolean"},"officer":{"type":"boolean"},"ten_percent_owner":{"type":"boolean"},"other":{"type":"boolean"}},"additionalProperties":true}},"additionalProperties":true}},"security":{"type":"string"},"published_at":{"type":"string"},"date":{"type":"string"},"kind":{"type":"string"},"planned":{"type":"boolean"},"acquired":{"type":"boolean"},"shares":{"type":"integer"},"price":{"type":"number"},"value":{"type":"number"},"ownership":{"type":"object","properties":{"direct":{"type":"boolean"},"nature":{"type":"string"}},"additionalProperties":true},"footnotes":{"type":"array","items":{"type":"object","properties":{"field":{"type":"string"},"element":{"type":"string"},"label":{"type":"string"},"text":{"type":"string"}},"additionalProperties":true}},"balance_after":{"type":"integer"},"source":{"type":"object","properties":{"system":{"type":"string"},"filing":{"type":"string"},"document":{"type":"string"},"document_sequence":{"type":"integer"},"table":{"type":"string"},"row_type":{"type":"string"},"position":{"type":"integer"},"url":{"type":"string"},"form_type":{"type":"string"}},"additionalProperties":true}},"additionalProperties":true}}},"additionalProperties":true},"example":{"transactions":[{"id":123,"issuer":{"id":123,"kind":"organization","name":"DAVITA INC.","symbol":"DVA"},"owners":[{"id":123,"kind":"organization","name":"BERKSHIRE HATHAWAY INC","position":1,"cik":"0001067983","reported_name":"BERKSHIRE HATHAWAY INC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":123,"kind":"person","name":"BUFFETT WARREN E","position":2,"cik":"0000315090","reported_name":"BUFFETT WARREN E","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-08-04T21:27:36.000Z","date":"2026-07-31","kind":"sale","planned":false,"acquired":false,"shares":182980,"price":199.548,"value":36513293.04,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"13,723,621 of the total reported securities are owned by Government Employees Insurance Company, a subsidiary of Berkshire Hathaway Inc. (\"Berkshire\"). As Berkshire is in the chain of ownership of this subsidiary, it may be deemed presently to both beneficially own and have a pecuniary interest in all shares of Common Stock presently owned by the subsidiary. Warren E. Buffett, as the controlling stockholder of Berkshire, may be deemed presently to beneficially own, but only to the extent he has a pecuniary interest in, the shares of Common Stock presently owned by the subsidiary. Mr. Buffett disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"14,973,608 of the total reported securities are owned by the following pension plans of Berkshire's subsidiaries: BNSF Master Retirement Trust (4,441,520) and Berkshire Hathaway Inc. Consolidated Pension Plan (10,532,088); each of Berkshire, Mr. Buffett and these pensions plan disclaim beneficial ownership in such shares."}],"balance_after":28697229,"source":{"system":"sec-edgar","filing":"0001193125-26-333151","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/927066/000119312526333151/ownership.xml","form_type":"4"}}]}}}},"304":{"description":"Unchanged response for supported conditional GET endpoints; no body."},"400":{"description":"Invalid parameter or cursor."},"401":{"description":"Missing or invalid API key when enforcement is enabled."},"403":{"description":"Verified email and active subscription required."},"404":{"description":"Unknown identity, filing or unavailable report."},"409":{"description":"Ambiguous ticker. Resolve candidates before retrying."}}}},"/institutions/{entity_id}/reports":{"get":{"operationId":"reports","tags":["Institutional portfolios"],"summary":"List manager reports","description":"Parsed manager reports known by the cutoff, newest publication first. Includes original reports, amendments and notice reports; indexed-but-unparsed reports are not returned.","parameters":[{"name":"entity_id","in":"path","required":true,"description":"Stable Tapewire organization ID from an entity or ticker resolution. Not a CIK or ticker.","schema":{"type":"string"}},{"name":"as_of","in":"query","required":false,"description":"ISO 8601 timestamp with timezone and up to six fractional digits, or YYYY-MM-DD. Invalid dates and nonscalar values return 400. Identity lookups use its UTC date, defaulting to today; filing queries use the acceptance cutoff (end of day for a date).","schema":{"type":"string"}},{"name":"limit","in":"query","required":false,"description":"Page size. Default 100; 1–500 for filings/transactions, 1–1000 for institutional endpoints.","schema":{"type":"integer","minimum":1,"maximum":1000,"default":100}},{"name":"offset","in":"query","required":false,"description":"Number of institutional rows to skip. Default 0, nonnegative. Increment by limit.","schema":{"type":"integer","minimum":0,"default":0}}],"responses":{"200":{"description":"Success. Rows are under data.","content":{"application/json":{"schema":{"type":"object","properties":{"data":{"type":"array","items":{"type":"object","properties":{"id":{"type":"integer"},"amendment_number":{"description":"Unavailable in this example; type depends on the field."},"amendment_type":{"description":"Unavailable in this example; type depends on the field."},"confidential_omitted":{"type":"boolean"},"created_at":{"type":"string"},"filing_id":{"type":"integer"},"manager_id":{"type":"integer"},"period_of_report":{"type":"string"},"report_type":{"type":"string"},"reported_entry_total":{"type":"integer"},"reported_value_total":{"type":"integer"},"updated_at":{"type":"string"},"value_multiplier":{"type":"integer"},"warnings":{"type":"array","items":{}},"other_managers":{"type":"array","items":{"type":"object","properties":{"role":{"type":"string"},"sequence":{"type":"string"},"name":{"type":"string"},"cik":{"description":"Unavailable in this example; type depends on the field."},"file_number":{"type":"string"}},"additionalProperties":true}},"accession_number":{"type":"string"},"published_at":{"type":"string"},"source_url":{"type":"string"}},"additionalProperties":true}},"limit":{"type":"integer"},"offset":{"type":"integer"}},"additionalProperties":true},"example":{"data":[{"id":123,"amendment_number":null,"amendment_type":null,"confidential_omitted":false,"created_at":"2026-09-06T12:00:00.000Z","filing_id":123,"manager_id":123,"period_of_report":"2026-06-30","report_type":"13F HOLDINGS REPORT","reported_entry_total":89,"reported_value_total":299253556246,"updated_at":"2026-09-06T12:00:00.000Z","value_multiplier":1,"warnings":[],"other_managers":[{"role":"included_in_report","sequence":"1","name":"Berkshire Hathaway Homestate Insurance Co.","cik":null,"file_number":"28-2226"},{"role":"included_in_report","sequence":"2","name":"Berkshire Hathaway Life Insurance Co of Nebraska","cik":null,"file_number":"28-5678"},{"role":"included_in_report","sequence":"3","name":"BH Finance LLC","cik":null,"file_number":"28-14389"},{"role":"included_in_report","sequence":"4","name":"Buffett Warren E","cik":null,"file_number":"28-554"},{"role":"included_in_report","sequence":"5","name":"Columbia Insurance Co","cik":null,"file_number":"28-1517"},{"role":"included_in_report","sequence":"6","name":"Cypress Insurance Co","cik":null,"file_number":"28-06102"},{"role":"included_in_report","sequence":"7","name":"General Re Corp","cik":null,"file_number":"28-04922"},{"role":"included_in_report","sequence":"8","name":"GEICO Corp","cik":null,"file_number":"28-852"},{"role":"included_in_report","sequence":"9","name":"Medical Protective Corp","cik":null,"file_number":"28-12941"},{"role":"included_in_report","sequence":"10","name":"National Fire & Marine Insurance Co","cik":null,"file_number":"28-1066"},{"role":"included_in_report","sequence":"11","name":"National Indemnity Co","cik":null,"file_number":"28-718"},{"role":"included_in_report","sequence":"12","name":"National Liability & Fire Insurance Co","cik":null,"file_number":"28-5006"},{"role":"included_in_report","sequence":"13","name":"Nebraska Furniture Mart","cik":null,"file_number":"28-11222"},{"role":"included_in_report","sequence":"14","name":"U.S. Investment Corp","cik":null,"file_number":"28-12947"}],"accession_number":"0001193125-26-352200","published_at":"2026-08-04T21:27:36.000Z","source_url":"https://www.sec.gov/Archives/edgar/data/1067983/000119312526352200/0001193125-26-352200-index.htm"}],"limit":1,"offset":0}}}},"304":{"description":"Unchanged response for supported conditional GET endpoints; no body."},"400":{"description":"Invalid parameter or cursor."},"401":{"description":"Missing or invalid API key when enforcement is enabled."},"403":{"description":"Verified email and active subscription required."},"404":{"description":"Unknown identity, filing or unavailable report."},"409":{"description":"Ambiguous ticker. Resolve candidates before retrying."}}}},"/institutions/{entity_id}/holdings":{"get":{"operationId":"holdings","tags":["Institutional portfolios"],"summary":"Retrieve a portfolio","description":"Reconstruct a quarter from the base/restatement plus applicable additions. Aggregate by CUSIP, title, put/call and share type. source_filings links the included filings; warnings explain reconstruction limitations. Default ordering is disclosed value descending.","parameters":[{"name":"entity_id","in":"path","required":true,"description":"Stable Tapewire organization ID from an entity or ticker resolution. Not a CIK or ticker.","schema":{"type":"string"}},{"name":"period","in":"query","required":false,"description":"Quarter-end date: YYYY-03-31, YYYY-06-30, YYYY-09-30, or YYYY-12-31. 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