Summary of Significant Accounting Policies	3 Months Ended
Mar. 31, 2025
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 2 -- Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited consolidated financial statements of HCI Group, Inc. and its majority-owned and controlled subsidiaries (collectively, the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information, and the Securities and Exchange Commission (“SEC”) rules for interim financial reporting. Certain information and footnote disclosures normally included in consolidated financial statements prepared in accordance with U.S. GAAP have been omitted pursuant to such rules and regulations. However, in the opinion of management, the accompanying consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the Company’s financial position as of March 31, 2025 and the results of operations and cash flows for the interim periods presented. The results of operations for the interim periods presented are not necessarily indicative of the results of operations to be expected for any subsequent interim period or for the fiscal year ending December 31, 2025. The accompanying unaudited consolidated financial statements and notes thereto should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2024 included in the Company’s Form 10-K, which was filed with the SEC on February 28, 2025. In preparing the interim unaudited consolidated financial statements, management was required to make certain judgments, assumptions, and estimates that affect the reported amounts of assets, liabilities, revenues, expenses and related disclosures at the financial reporting date and throughout the periods being reported upon. Certain of the estimates result from judgments that can be subjective and complex, and consequently actual results may differ from these estimates. Material estimates that are particularly susceptible to significant change in the near term are related to the Company’s losses and loss adjustment expenses, which include amounts estimated for claims incurred but not yet reported. The Company uses various assumptions and actuarial data it believes to be reasonable under the circumstances to make these estimates. In addition, accounting policies specific to reinsurance with retrospective provisions, reinsurance recoverable, deferred income taxes, limited partnership investments, allowance for credit losses, and stock-based compensation expense involve significant judgments and estimates material to the Company’s consolidated financial statements. In the case of assumed business, the Company relies entirely on the ceding insurance company to provide information about premiums, losses, and loss adjustment expenses. When the information is not available at the reporting date, the Company will make estimates based on all recent available data. Accordingly, the actual results could differ significantly from those estimates. All significant intercompany balances and transactions have been eliminated. Reclassification The Company's previously reported segment information has been recast to conform with the current presentation. See Note 15 -- “Segment Information.”

Basis of Presentation

The accompanying unaudited consolidated financial statements of HCI Group, Inc. and its majority-owned and controlled subsidiaries (collectively, the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information, and the Securities and Exchange Commission (“SEC”) rules for interim financial reporting. Certain

information and footnote disclosures normally included in consolidated financial statements prepared in accordance with U.S. GAAP have been omitted pursuant to such rules and regulations. However, in the opinion of management, the accompanying consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the Company’s financial position as of March 31, 2025 and the results of operations and cash flows for the interim periods presented. The results of operations for the interim periods presented are not necessarily indicative of the results of operations to be expected for any subsequent interim period or for the fiscal year ending December 31, 2025. The accompanying unaudited consolidated financial statements and notes thereto should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2024 included in the Company’s Form 10-K, which was filed with the SEC on February 28, 2025.

In preparing the interim unaudited consolidated financial statements, management was required to make certain judgments, assumptions, and estimates that affect the reported amounts of assets, liabilities, revenues, expenses and related disclosures at the financial reporting date and throughout the periods being reported upon. Certain of the estimates result from judgments that can be subjective and complex, and consequently actual results may differ from these estimates.

Material estimates that are particularly susceptible to significant change in the near term are related to the Company’s losses and loss adjustment expenses, which include amounts estimated for claims incurred but not yet reported. The Company uses various assumptions and actuarial data it believes to be reasonable under the circumstances to make these estimates. In addition, accounting policies specific to reinsurance with retrospective provisions, reinsurance recoverable, deferred income taxes, limited partnership investments, allowance for credit losses, and stock-based compensation expense involve significant judgments and estimates material to the Company’s consolidated financial statements.

In the case of assumed business, the Company relies entirely on the ceding insurance company to provide information about premiums, losses, and loss adjustment expenses. When the information is not available at the reporting date, the Company will make estimates based on all recent available data. Accordingly, the actual results could differ significantly from those estimates.