Thames Valley Police have released an image of 21-year-old Q Johnson, also known as Ricky, or Jamie Sampson, who they want to speak to about a stabbing in Reading, on Boxing Day.
A second man, believed to be in his twenties and may be known as Diego is also wanted in connection with the attack.
Investigating officer Detective Constable Ben Sherriff said: “I would appeal to anyone with any information about the whereabouts of Q Johnson, who is also known as Ricky or Jamie Sampson, to contact police immediately.
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“I would also appeal to anyone who recognises the second man, who we believe is known as Diego, to make contact with the police as soon as possible.”
He added: “If you are harbouring either of these men then you could be committing a crime, so it is vitally important that you contact us now.”
The attack, in Reading on Boxing Day, left a 28-year-old man with chest wounds, including a punctured lung. He was treated at The John Radcliffe Hospital in Oxford but has since been discharged.
It is believed that Q Johnson has links to Reading, Bedford in Bedfordshire and Wandsworth in London. Both wanted men are black, about 5ft 8ins and of medium build.
Anyone with information should call 101, or Crimestoppers anonymously on 0800 555111.
Det Con Sherriff added: “Members of the public are advised not to approach either men, but instead call 999.”