Horner told the Daily Mail newspaper there had been "several conversations over the years" about Hamilton joining the team who are currently dominant with triple world champion Max Verstappen.
Most recently, earlier in the year, there was an inquiry about whether there would be any interest," said the team boss.
"SERIOUS TALKS"Horner told the Daily Mail that Hamilton, who has not won a race since 2021, also had talks with Ferrari chairman John Elkann earlier in the year.
There were definitely conversations, perhaps with (Ferrari team boss Fred) Vasseur, too.
Hamilton, who has said he sees himself at Mercedes "until my last days", denied the Ferrari speculation at the time.
Persons:
Lewis Hamilton, Christian Horner, Red Bull Formula, Horner, Hamilton, Max Verstappen, Abu, messaged, I've, Mercedes, Ferrari, Verstappen, Red Bull, John Elkann, Fred, Vasseur, Elkann, Alan Baldwin, Ken Ferris, Toby Davis
Organizations:
Red Bull, Briton, Mercedes, Daily Mail, Prix, Sky Sports, FIA, Thomson
Locations:
ABU DHABI, Abu Dhabi, Monaco, London