However, despite the speculation, Lennon has expressed his desire to keep the English striker at Celtic Park.
"He's our player and he has got 18 months to go on his contract. He's probably in the best form since he walked into the club," Lennon told reporters. "I'll reiterate it again - I don't want to sell him and the club doesn't want to sell him and I think we remain pretty steadfast on that.
"We've only had one club interested. We haven't even asked for a price. People say 'name your price' but we are not putting a price on him."
Hooper has scored 23 goals in all competitions so far this season.