{"filing":{"accession_number":"0001171843-26-006728","cik":"0001943421","ticker":"RUBI","company_name":"Rubico Inc.","form":"6-K","filing_date":"2026-10-21","report_date":"2026-10-20","primary_document":"f6k_102026.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1943421/000117184326006728/f6k_102026.htm"},"events":[{"id":36660,"run_id":33804,"accession_number":"0001171843-26-006728","anchor_item_number":"EX-99.1","event_type":"financial_other","event_domain":"financial","is_material":true,"confidence":0.75,"summary":"This press release announces a significant increase in the Company's estimated net asset value (NAV) to $258.0 million, a 41% increase from the previously reported NAV as of July 16, 2026. The disclosure includes NAV per share ($20.49 basic, $3.58 fully-diluted) and highlights a substantial discount between the current stock price and estimated NAV. While NAV is a non-GAAP metric commonly used in the shipping industry to track asset values and measure loan-to-value compliance, this material revaluation of the Company's asset base would affect a reasonable investor's assessment of the registrant's financial position and intrinsic value. The event does not fit a specific named financial category (not earnings results, debt issuance, dividend, or impairment charge) but is clearly a significant financial disclosure warranting classification as financial_other.","company_name":"Rubico Inc.","ticker":"RUBI","filing_date":"2026-10-21","form":"6-K","submitted_at":null,"items":[{"id":41159,"accession_number":"0001171843-26-006728","item_number":"EX-99.1","item_title":"exh_991.htm","event_type":"financial_other","event_domain":"financial","is_material":true,"confidence":0.75,"reasoning":"This press release announces a significant increase in the Company's estimated net asset value (NAV) to $258.0 million, a 41% increase from the previously reported NAV as of July 16, 2026. The disclosure includes NAV per share ($20.49 basic, $3.58 fully-diluted) and highlights a substantial discount between the current stock price and estimated NAV. While NAV is a non-GAAP metric commonly used in the shipping industry to track asset values and measure loan-to-value compliance, this material revaluation of the Company's asset base would affect a reasonable investor's assessment of the registrant's financial position and intrinsic value. The event does not fit a specific named financial category (not earnings results, debt issuance, dividend, or impairment charge) but is clearly a significant financial disclosure warranting classification as financial_other.","classifier_version":"claude-haiku-4-5-20251001+prompt-6be895f9","taxonomy_version":"v1.3","classified_at":"2026-10-21T15:00:38.879605+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":41159,"accession_number":"0001171843-26-006728","item_number":"EX-99.1","item_title":"exh_991.htm","event_type":"financial_other","event_domain":"financial","is_material":true,"confidence":0.75,"reasoning":"This press release announces a significant increase in the Company's estimated net asset value (NAV) to $258.0 million, a 41% increase from the previously reported NAV as of July 16, 2026. The disclosure includes NAV per share ($20.49 basic, $3.58 fully-diluted) and highlights a substantial discount between the current stock price and estimated NAV. While NAV is a non-GAAP metric commonly used in the shipping industry to track asset values and measure loan-to-value compliance, this material revaluation of the Company's asset base would affect a reasonable investor's assessment of the registrant's financial position and intrinsic value. The event does not fit a specific named financial category (not earnings results, debt issuance, dividend, or impairment charge) but is clearly a significant financial disclosure warranting classification as financial_other.","classifier_version":"claude-haiku-4-5-20251001+prompt-6be895f9","taxonomy_version":"v1.3","classified_at":"2026-10-21T15:00:38.879605+00:00","company_name":"Rubico Inc.","ticker":"RUBI","filing_date":"2026-10-21"}]}