RESIDEO TECHNOLOGIES, INC.

(a) Chief Executive Officer Transition Agreement Amendment.

On February 20, 2026, the Company entered into a letter agreement with Mr. Geldmacher further amending his prior letter agreement governing the terms of his transition in connection with his retirement from the Company. Given that Mr. Geldmacher’s retirement date has extended beyond what was originally contemplated, the Compensation and Human Capital Management Committee, as reflected in the letter agreement, approved an increase to his annual base salary to $1,103,310, effective April 1, 2026 and granted him, on February 18, 2026, a restricted stock unit that vests on the first anniversary of the grant date so long as he remains employed through the vesting date or, if his employment has ended six months following the date a new Chief Executive Officer commences employment as Chief Executive Officer pursuant to the original letter agreement, he remains in compliance with his noncompete and other restrictive covenant agreements as of the vesting date, subject to the other provisions of the award agreement.

(b) Securities Trading Plans of Directors and Executive Officers.

During the three months ended December 31, 2025, no director or officer of the Company adopted, modified orterminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K.