Director — Jan Stern Reed: Ms. Reed resigned from the Board of Directors and all committees she served on.

Other Events On July 29, 2026, the Company issued a press release announcing that the Board had declared a quarterly cash dividend on the Company’s common stock of $0.395 per share. The dividend will be paid on September 15, 2026, to common stockholders of record as of September 1, 2026. A copy of the press release is attached as Exhibit 99.2 hereto and incorporated herein by reference. Forward - Looking Statements The information included in this Current Report on Form 8-K contains forward-l…

Costs Associated with Exit or Disposal Activities. On July 28, 2026, the Board of Directors (the “Board”) of the Company approved a plan to reduce the Company’s global salaried workforce by around 100 roles during the third quarter of 2026 as part of Project Catalyst, the Company’s previously announced comprehensive operational and efficiency initiative. As previously disclosed, the Company anticipates recognizing full-year restructuring charges in the range of $75.0 million to $80.0 million…

The information furnished under this Item 2.02, including Exhibit 99.1, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and shall not be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended (the “Securities Act”), except as expressly set forth by specific reference in such filing.

Other Events On April 28, 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 June 15, 2026, to common stockholders of record as of June 1, 2026. A copy of the press release is attached as Exhibit 99.2 hereto and incorporated herein by reference.

Results of Operations and Financial Condition On April 28, 2026, Stepan Company (“Stepan”) issued a press release providing its financial results for the quarter ended March 31, 2026. A copy of the press release is attached as Exhibit 99.1 hereto and incorporated herein by reference.

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…

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.

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.

Costs Associated with Exit or Disposal Activities. On February 20, 2026, the Board of Directors of Stepan Company (“Stepan” or the “Company”) approved a comprehensive operational and efficiency plan with the objective to deliver approximately $100 million in pre-tax savings over the next two years (“Project Catalyst”). As part of Project Catalyst, the Company will close its Fieldsboro, New Jersey site and decommission select assets at its Elwood (Millsdale), Illinois and Stalybridge, United K…

The filing discloses the adoption of a severance benefit plan, which is a compensatory arrangement rather than an actual departure, appointment, or election of an officer or director.

Results of Operations and Financial Condition On October 29, 2025, Stepan Company (“Stepan”) issued a press release providing its financial results for the quarter ended September 30, 2025. A copy of the press release is attached as Exhibit 99.1 hereto and incorporated herein by reference.

Other Events On October 29, 2025, 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 December 15, 2025, to common stockholders of record as of November 28, 2025. A copy of the press release is attached as Exhibit 99.2 hereto and incorporated herein by reference.

Global Vice President, Finance and Investor Relations — Samuel S. Hinrichsen: Mr. Hinrichsen resigned from his roles, including Global Vice President, Finance and Investor Relations.

Other Events On July 30, 2025, Stepan issued a press release announcing that its Board of Directors had declared a quarterly cash dividend on its common stock of $0.385 per share. The dividend will be paid on September 15, 2025, to common stockholders of record as of August 29, 2025. A copy of the press release is attached as Exhibit 99.2 hereto and incorporated herein by reference.

Results of Operations and Financial Condition On July 30, 2025, Stepan Company (“Stepan”) issued a press release providing its financial results for the quarter ended June 30, 2025. A copy of the press release is attached as Exhibit 99.1 hereto and incorporated herein by reference.

CFO — Ruben Velasquez: The filing announces the appointment of an external candidate as CFO to succeed an interim officer who is retaining a VP role, representing a planned succession rather than a sudden loss of a sitting executive.

Director — Corning Painter: The filing announces the appointment of a new director to an expanded board, which is a routine governance action rather than an executive departure.

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. As previously disclosed, on June 10, 2021, Stepan Company (“Stepan”) entered into a Note Purchase and Private Shelf Agreement by and among Stepan, PGIM, Inc., the Purchasers named in the Purchaser Schedule attached thereto and each other Prudential Affiliate (as defined therein) from time to time party thereto (the “Prudential Note Purchase Agreement”) and a Note Purchase and Mas…

The filing discloses the approval of an equity incentive compensation plan, which is a non-management matter mis-filed under Item 5.02.

Other Events On April 29, 2025, Stepan issued a press release announcing that its Board of Directors had declared a quarterly cash dividend on its common stock of $0.385 per share. The dividend will be paid on June 13, 2025, to common stockholders of record as of May 30, 2025. A copy of the press release is attached as Exhibit 99.2 hereto and incorporated herein by reference.

Results of Operations and Financial Condition On April 29, 2025, Stepan Company (“Stepan”) issued a press release providing its financial results for the quarter ended March 31, 2025. A copy of the press release is attached as Exhibit 99.1 hereto and incorporated herein by reference.

General Counsel — Mr. Kabbes: The filing describes the retirement of the General Counsel with a structured transition plan and consulting agreement, indicating an orderly succession rather than a sudden loss.

Director — Edward J. Wehmer: The filing discloses the planned retirement of a long-serving Lead Independent Director with a named successor, representing an orderly succession rather than a sudden loss of executive management.

Results of Operations and Financial Condition On February 19, 2025, Stepan Company (“Stepan”) issued a press release providing its financial results for the quarter and the year ended December 31, 2024. A copy of the press release is attached as Exhibit 99.1 hereto and incorporated herein by reference.