Results of Operations and Financial Condition On August 11, 2026, The Eastern Company issued a press release announcing its second quarter earnings for 2026. A copy of the press release is furnished herewith as Exhibit 99.1.

Regulation FD Disclosure On June 2, 2026, The Eastern Company announced the acquisition of Sungear and Crown Precision. A copy of the press release dated June 2, 2026 announcing the acquisition of Sungear and Crown Precision is attached hereto.

Results of Operations and Financial Condition Press Release dated May 12, 2026 announcing the first quarter earnings for 2026 is attached hereto.

Director — Mr. Charles W. Henry and Mr. Michael J. Mardy: Two directors are retiring from the Board, reducing its size.

Results of Operations and Financial Condition Press Release dated March 3, 2026 announcing the fourth quarter and full year earnings for 2025 is attached hereto.

Director — Mr. Charles W. Henry and Mr. Michael J. Mardy: Directors are retiring from the Board without a successor being named.

Results of Operations and Financial Condition Press Release dated November 4, 2025 announcing the third quarter earnings for 2025 is attached hereto.

Termination of a Material Definitive Agreement. On October 28, 2025, the Company used the proceeds upon the closing of the Credit Agreement to repay all outstanding obligations, totaling $36 million, and terminate all outstanding commitments under that certain credit agreement, dated as of June 16, 2023 (as amended, amended and restated, supplemented and otherwise modified, the “Prior Credit Agreement”), among the Company, the lenders from time to time party thereto, TD Bank, N.A., as the adm…

Entry into a Material Definitive Agreement. On October 28, 2025, The Eastern Company (the “Company”) entered into a Credit Agreement (the “Credit Agreement”) with the lenders from time to time party thereto, and Citizens Bank, N.A., as the administrative agent (in such capacity, the “Agent”), as an LC issuer, and as the swing line lender, and a related Pledge and Security Agreement (the “Security Agreement”). The Credit Agreement provides for the extension of credit to the Company in the form…

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

Results of Operations and Financial Condition Press Release dated August 5, 2025 announcing the second quarter earnings for 2025 is attached hereto.

COSTS ASSOCIATED WITH EXIT OR DISPOSAL ACTIVITIES On May 28, 2025, the Company committed to and commenced a reduction in force to reduce operating costs and better align its workforce with the needs of its business following a comprehensive review of its structure. The reduction in force is expected to be completed in the 2 nd quarter of 2025. The Company expects that the workforce reduction will decrease its annual operating costs by approximately $4.0 million. In connection with the reducti…

The reassignment of committee roles is a routine administrative matter.

Results of Operations and Financial Condition Press Release dated May 6, 2025 announcing the first quarter earnings for 2025 is attached hereto.

Director — Mr. Chan W. Galbato: The Board of Directors elected Mr. Chan W. Galbato as a new director to fill the resulting vacancy.

Results of Operations and Financial Condition Press Release dated March 11, 2025, announcing the fourth quarter and full year earnings for 2024 is attached hereto.

Chief Executive Officer — Ryan Schroeder: The company appointed Ryan Schroeder as the new Chief Executive Officer from an external position.

Results of Operations and Financial Condition Press Release dated November 5, 2024, announcing the third quarter earnings for 2024 is attached hereto.

Results of Operations and Financial Condition Press Release dated August 6, 2024, announcing the second quarter earnings for 2024 is attached hereto.

The filing describes changes to equity award agreements for executive officers.

Results of Operations and Financial Condition Press Release dated May 6, 2024, announcing the first quarter earnings for 2024 is attached hereto.

Results of Operations and Financial Condition Press Release dated March 12, 2024, announcing the fourth quarter and full year earnings for 2023 is attached hereto.

Results of Operations and Financial Condition Press Release dated November 7, 2023, announcing the third quarter earnings for 2023 is attached hereto. Earnings Call Transcript dated November 8, 2023, detailing review of third quarter earnings for 2023 is attached hereto.

Chief Executive Officer — Mark Hernandez: The Amended Agreement updates the terms of compensation upon termination without Cause or for Good Reason.

Other Events On August 21, 2023, The Eastern Company (the “Company”) issued a press release announcing that its Board of Directors approved a new share repurchase program authorizing the Company to repurchase up to 200,000 shares of its common stock through August 20, 2028. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.