Condensed Consolidated Financial Statements	6 Months Ended
Jun. 30, 2025
Accounting Policies [Abstract]
Condensed Consolidated Financial Statements	1. CONDENSED CONSOLIDATED FINANCIAL STATEMENTS The condensed consolidated financial statements included herein have been prepared by Stepan Company (the Company), without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) have been condensed or omitted pursuant to such rules and regulations, although management believes that the disclosures are adequate and make the information presented not misleading. In the opinion of management, all adjustments, consisting only of normal recurring accruals, necessary to present fairly the Company’s financial position as of June 30, 2025, its results of operations for the three and six months ended June 30, 2025 and 2024 and cash flows for the six months ended June 30, 2025 and 2024, have been included. These financial statements and related footnotes should be read in conjunction with the financial statements and related footnotes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024 (2024 Annual Report on Form 10-K).

Condensed Consolidated Financial Statements

6 Months Ended

Jun. 30, 2025

Condensed Consolidated Financial Statements

CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

The condensed consolidated financial statements included herein have been prepared by Stepan Company (the Company), without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) have been condensed or omitted pursuant to such rules and regulations, although management believes that the disclosures are adequate and make the information presented not misleading. In the opinion of management, all adjustments, consisting only of normal recurring accruals, necessary to present fairly the Company’s financial position as of June 30, 2025, its results of operations for the three and six months ended June 30, 2025 and 2024 and cash flows for the six months ended June 30, 2025 and 2024, have been included. These financial statements and related footnotes should be read in conjunction with the financial statements and related footnotes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024 (2024 Annual Report on Form 10-K).