REZI Resideo Technologies Inc

On December 14, 2020, Resideo Technologies, Inc. (the “Company”) completed the closing of the exercise of the underwriters’ option to purchase an additional 2,550,000 shares of common stock at the public offering price of $15.00 per share as part of the firm commitment underwritten offering that initially closed on November 20, 2020, resulting in additional net proceeds to the Company of approximately $36.5 million. After giving effect to this exercise of the over-allotment option, the total number of shares sold by Company in the public offering increased to 19,550,000 shares and net proceeds before expenses increased to approximately $280.1 million.

Morgan Stanley & Co. LLC and Evercore Group L.L.C. acted as joint book-running managers and BofA Securities, Inc. and J.P. Morgan Securities LLC acted as additional bookrunners. Raymond James, William Blair and KeyBanc Capital Markets acted as co-managers. The shares were offered by the Company pursuant to an automatically effective shelf registration statement that was previously filed with the Securities and Exchange Commission (“SEC”). A prospectus supplement relating to, and describing the terms of, the offering was previously filed with the SEC and is available on the SEC’s web site at www.sec.gov. Copies of the prospectus supplement and the accompanying prospectus relating to the offering can be obtained from Morgan Stanley & Co. LLC, 180 Varick Street, 2nd Floor, New York, NY 10014, Attention: Prospectus Department, or from Evercore Group L.L.C., Attn: Equity Capital Markets, 55 East 52nd Street, 36th Floor, New York, New York 10055, by email at ecm.prospectus@evercore.com, or by telephone at (888) 474-0200.

2