GRIFFON CORP

Rule 10b5-1 Trading Plans

During the quarter ended June 30, 2025, none of our directors or executive officers adopted orterminated any contract, instruction or written plan for the purchase or sale of our securities to satisfy the affirmative defense conditions of Rule 10b5-1(c) or any "non-Rule 10b5-1 trading arrangement".

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

Griffon Corporation 2025 Retiree Medical Plan

On August 5, 2025, we approved a retiree medical arrangement (the "RMA") for each of Ronald J. Kramer, our Chief Executive Officer; Robert F. Mehmel, our President and Chief Operating Officer; Brian G. Harris, our Executive Vice President and Chief Financial Officer; and Seth L. Kaplan, our Senior Vice President, General Counsel and Secretary. To vest and qualify for benefits under the RMA, each executive must have age plus years of service equal to 72 or greater and must remain employed by Griffon for one year following approval of the RMA. Each of Messrs. Kramer, Mehmel, Harris and Kaplan will meet these vesting requirements in August, 2026. If, prior to vesting, an executive’s employment is terminated by Griffon without cause, by the executive for good reason, or due to the death or disability of the executive, the executive will immediately fully vest under the RMA.

Under the RMA, Griffon has agreed to provide coverage under its major medical plans for the executive and the executive’s spouse, following the executive’s retirement, for the life of the executive and the executive’s spouse (or, if such coverage cannot be provided, an equivalent benefit). Griffon will also be obligated to reimburse each executive up to $35,000 a year (indexed 3% a year for inflation, with the base year being 2025) for qualified medical expenses, incurred by the executive or the executive’s spouse, that are not covered by Griffon’s major medical plans (such as deductibles, co-payments, and out-of-network costs).