Daniel Rich, aged 25, was last seen yesterday (1/1) between 5.15pm and 5.30pm in Craven Way, Kintbury.
He is white, 6ft tall with a skinny build, black shoulder length hair, a light brown beard and brown eyes.
Daniel is believed to be driving a grey Renault Megane convertible which was last seen in Speen, Newbury at about 7pm yesterday.
Investigating officer, Inspector Caroline Harrison, based at Newbury police station, said: “We would like to speak to anyone who has any information relating to Daniel’s whereabouts as we are increasingly concerned for his welfare.
“Daniel, if you see this appeal, please get in touch to let us know you are OK.
“If you have seen Daniel, or have any information which you think could help find him, please call 101 quoting reference 43190000789.”