Results of Operations and Financial Condition. On July 30, 2026, Quaker Chemical Corporation announced its results of operations for the second quarter ended June 30, 2026 in a press release, the text of which is included as Exhibit 99.1 hereto. Supplemental information related to the same period is also included as Exhibit 99.2 hereto.

Vice President, Corporate Controller and Principal Accounting Officer — Steven Dassing: Mr. Dassing resigned to pursue another career opportunity.

Chairman of the Board — Mr. Michael F. Barry: Mr. Barry retired from the Board and was succeeded by Mr. Mark A. Douglas as Chairman.

Results of Operations and Financial Condition. On April 30, 2026, Quaker Chemical Corporation announced its results of operations for the first quarter ended March 31, 2026 in a press release, the text of which is included as Exhibit 99.1 hereto. Supplemental information related to the same period is also included as Exhibit 99.2 hereto.

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information in

Entry into a Material Definitive Agreement. On April 10, 2026, Quaker Chemical Corporation (the “ Company ”), and its wholly-owned subsidiary, Quaker Houghton B.V., as borrowers, Bank of America, N.A., as administrative agent, U.S. dollar swing line lender and letter of credit issuer (the “ Administrative Agent ”), Bank of America Europe Designated Active Company, as Euro Swing Line Lender, certain guarantors and other lenders (the “ Lenders ”) entered into Amendment No. 4 (the “ Amended Cred…

Senior Vice President, Chief Global Operations Officer — Jeffrey Fleck: Mr. Fleck's departure is an involuntary termination without cause.

Results of Operations and Financial Condition. On February 23, 2026, Quaker Chemical Corporation announced its results of operations for the fourth quarter and full year ended December 31, 2025 in a press release, the text of which is included as Exhibit 99.1 hereto. Supplemental information related to the same period is also included as Exhibit 99.2 hereto.

Results of Operations and Financial Condition. On October 30, 2025, Quaker Chemical Corporation announced its results of operations for the third quarter ended September 30, 2025 in a press release, the text of which is included as Exhibit 99.1 hereto. Supplemental information related to the same period is also included as Exhibit 99.2 hereto.

Results of Operations and Financial Condition. On July 31, 2025, Quaker Chemical Corporation announced its results of operations for the second quarter ended June 30, 2025 in a press release, the text of which is included as Exhibit 99.1 hereto. Supplemental information related to the same period is also included as Exhibit 99.2 hereto.

Chief Accounting Officer — Jeffrey Kutz: The voluntary resignation of the Chief Accounting Officer was accompanied by the immediate internal promotion of the Corporate Controller to Principal Accounting Officer, indicating an orderly succession rather than a sudden loss of leadership.

Director — Ramaswami Seshasayee: A voluntary retirement of a board member with no disagreement and a planned reduction in board size is a routine governance event, not a shock to executive management.

Results of Operations and Financial Condition. On May 1, 2025, Quaker Chemical Corporation announced its results of operations for the first quarter ended March 31, 2025 in a press release, the text of which is included as Exhibit 99.1 hereto. Supplemental information related to the same period is also included as Exhibit 99.2 hereto.

Other Events. Quaker Chemical Corporation (the “Company” or “Quaker Houghton”) issued a press release on April 1, 2025 announcing it has completed its previously announced acquisition of Dipsol Chemicals Co., Ltd. (“Dipsol”), a company headquartered in Japan and a leading supplier of surface treatment and plating solutions and services primarily for the automotive and other industrial applications. The Company also announced the acquisition of Natech, Ltd. (“Natech”), a U.K.-based manufacture…

Other Events. Quaker Chemical Corporation (the “Company” or “Quaker Houghton”) entered into a purchase agreement on March 25, 2025 (the “Purchase Agreement”) to acquire Dipsol Chemicals Co., Ltd. (“Dipsol”), a company headquartered in Japan and a leading supplier of surface treatment and plating solutions and services primarily for the automotive and other industrial applications. The transaction is expected to close in the second quarter of 2025 and is subject to applicable regulatory approv…

Results of Operations and Financial Condition. On February 24, 2025, Quaker Chemical Corporation announced its results of operations for the fourth quarter and full year ended December 31, 2024 in a press release, the text of which is included as Exhibit 99.1 hereto. Supplemental information related to the same period is also included as Exhibit 99.2 hereto.

CFO — Tom Coler: The filing discloses the grant of long-term incentive equity compensation awards to executives, which is a compensatory arrangement rather than a change in management status.

CEO — Andrew E. Tometich: The filing explicitly states the departure was due to an 'involuntary termination' of the CEO and President, which constitutes a high-materiality negative event.

Chief Human Resources Officer — Melissa Leneis: The filing discloses the involuntary termination without cause of the Chief Human Resources Officer, which is a genuine executive departure but typically carries lower materiality than a CEO or CFO exit.

CEO — Joseph A. Berquist: The filing discloses the internal promotion of the Chief Commercial Officer to CEO and President, which is a significant leadership change but not a departure of an existing executive.

Results of Operations and Financial Condition. On October 31, 2024, Quaker Chemical Corporation announced its results of operations for the third quarter ended September 30, 2024 in a press release, the text of which is included as Exhibit 99.1 hereto. Supplemental information related to the same period is also included as Exhibit 99.2 hereto.

Results of Operations and Financial Condition. On August 5, 2024, Quaker Chemical Corporation announced its results of operations for the second quarter ended June 30, 2024 in a press release, the text of which is included as Exhibit 99.1 hereto. Supplemental information related to the same period is also included as Exhibit 99.2 hereto.

Director — Nandita Bakhshi, Lucrèce Foufopoulos-De Ridder: The filing discloses the routine expansion of the board and the election of two new directors, which is a standard governance event rather than an executive departure.

CFO — Tom Coler: The filing discloses the termination of the sitting CFO and the simultaneous appointment of an external successor, representing a significant change in senior management.

The filing discloses the approval of a long-term incentive plan, which is a compensatory arrangement rather than a change in management personnel.