{"success":true,"meta":{"generated_at":"2026-08-29T13:45:24.465Z","source":"SEC EDGAR 13F","license":"https://www.sec.gov/about/website-policies"},"data":{"id":33,"name":"Guy Spier","fund_name":"Aquamarine Capital Management","cik":"0001953324","description":"Buffett-style investor","url":"https://superinvestorclub.com/manager/33","markdown_url":"https://superinvestorclub.com/manager/33/llm.txt","latest_period":"2026-06-30","latest_filing_date":"2026-07-10","total_value":144091000,"num_holdings":7,"filings":[{"period":"2026-06-30","filing_date":"2026-07-10","accession_number":"0001953324-26-000003"},{"period":"2026-03-31","filing_date":"2026-04-17","accession_number":"0001953324-26-000002"},{"period":"2025-12-31","filing_date":"2026-01-15","accession_number":"0001953324-26-000001"},{"period":"2025-09-30","filing_date":"2025-10-20","accession_number":"0001953324-25-000007"},{"period":"2022-06-30","filing_date":"2022-08-02","accession_number":"0001404599-22-000005"},{"period":"2022-03-31","filing_date":"2022-05-12","accession_number":"0001404599-22-000002"},{"period":"2021-12-31","filing_date":"2022-02-07","accession_number":"0001404599-22-000001"},{"period":"2021-09-30","filing_date":"2021-10-28","accession_number":"0001404599-21-000006"},{"period":"2021-06-30","filing_date":"2021-08-04","accession_number":"0001404599-21-000005"},{"period":"2021-03-31","filing_date":"2021-05-17","accession_number":"0001404599-21-000004"},{"period":"2020-12-31","filing_date":"2021-02-12","accession_number":"0001404599-21-000002"},{"period":"2020-09-30","filing_date":"2020-11-13","accession_number":"0001404599-20-000007"}],"holdings":[{"ticker":"BRK.B","cusip":"084670702","company_name":"BERKSHIRE HATHAWAY INC DEL","shares":"97600","value":48838000,"pct_of_portfolio":33.893858742044955,"security_type":"SH","change_type":"UNCHANGED","shares_change_pct":null,"prev_shares":"97600","prev_value":46770000},{"ticker":"BRK.A","cusip":"084670108","company_name":"BERKSHIRE HATHAWAY INC DEL","shares":"30","value":22466000,"pct_of_portfolio":15.591535904393753,"security_type":"SH","change_type":"UNCHANGED","shares_change_pct":null,"prev_shares":"30","prev_value":21544000},{"ticker":"AXP","cusip":"025816109","company_name":"AMERICAN EXPRESS CO","shares":"65000","value":21986000,"pct_of_portfolio":15.258413086174711,"security_type":"SH","change_type":"UNCHANGED","shares_change_pct":null,"prev_shares":"65000","prev_value":19661000},{"ticker":"MA","cusip":"57636Q104","company_name":"MASTERCARD INCORPORATED","shares":"40000","value":20544000,"pct_of_portfolio":14.257656619775002,"security_type":"SH","change_type":"UNCHANGED","shares_change_pct":null,"prev_shares":"40000","prev_value":19986000},{"ticker":"MCO","cusip":"615369105","company_name":"MOODYS CORP","shares":"27000","value":12229000,"pct_of_portfolio":8.486997800001388,"security_type":"SH","change_type":"UNCHANGED","shares_change_pct":null,"prev_shares":"27000","prev_value":11779000},{"ticker":"RACE","cusip":"N3167Y103","company_name":"FERRARI N V","shares":"30000","value":11114000,"pct_of_portfolio":7.713181253513405,"security_type":"SH","change_type":"UNCHANGED","shares_change_pct":null,"prev_shares":"30000","prev_value":10016000},{"ticker":"DJCO","cusip":"233912104","company_name":"DAILY JOURNAL CORP","shares":"11500","value":6914000,"pct_of_portfolio":4.798356594096786,"security_type":"SH","change_type":"UNCHANGED","shares_change_pct":null,"prev_shares":"11500","prev_value":5547000}]}}