Corporate Actions

and Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing. Forward-Looking Statements The information included in this Current Report on Form 8-K, including the press release furnished as Exhibit 99.1, contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements include, but are not limited to, statements about the Company’s plans, objectives, strategies, financial performance and outlook, trends, prospects, and future events. Actual results may differ materially from those expressed or implied by such forward-looking statemen

Results of Operations and Financial Condition On February 23, 2026, Stepan Company (“Stepan”) issued a press release providing its financial results for the quarter and the year ended December 31, 2025. A copy of the press release is attached as Exhibit 99.1 hereto and incorporated herein by reference. Item 8.01. Other Events On February 23, 2026, Stepan issued a press release announcing that its Board of Directors had declared a quarterly cash dividend on its common stock of $0.395 per share. The dividend will be paid on March 13, 2026, to common stockholders of record as of March 2, 2026. A copy of the press release is attached as Exhibit 99.2 hereto and incorporated herein by reference. Item 9.01. Financial Statements and Exhibits (d) Exhibits Exhibit Number: 99.1 Description: Press Release of Stepan Company dated February 23, 2026 Exhibit Number: 99.2 Description: Press Release of