Richard Brockbank, aged 27, from Thatcham, was last seen at a petrol station in Newbury at 10pm on Monday night (19/5). He has not been seen since.
It is believed he is in the Dorset area as his car, a black Ford Fiesta, has since been found in Wareham, Dorset.
Richard is white, 5ft 9ins and has short black hair, with a trimmed beard and he is of average build. He was last seen wearing a light green hooded top with a large logo on the front and dark jeans.
Chief Inspector Rob France, leading the search, said: “We are increasingly concerned for Richard’s welfare as he hasn’t been seen since Monday, neither has he been in contact with family and friends, which is very out of character for him.
I urge anyone who has seen him or has any information on his whereabouts to get in touch as soon as possible.”
Anyone with information is asked to contact Thames Valley Police on the 24-hour non-emergency number 101, quoting URN 77 of 20/5.