A press report over the weekend claimed that Middlesbrough, Fulham and Cardiff City were all keen to lure the Wales captain away from St James' Park, but Speed claims to know nothing of the speculation.
"There is speculation that Newcastle are going to splash out over the summer to further strengthen the squad - and there is always speculation in football that players may go," he told the Western Mail.
"But I don't really take much notice of those kind of stories until the players actually arrive or leave.
"What I do know is that Newcastle is a fantastic place to be and under Bobby Robson the future is certainly looking bright. We've got the best supporters in the world and I want to do my bit to help bring some silverware to the club for their sake.
"I'm looking forward to the new season as a Newcastle player because I feel the experience we gained last year, in the Premiership and the Champions League, will ensure we come back better and stronger for the new campaign.
"Hopefully, I've got a massive season ahead of me - with Newcastle and with Wales."
Maverick Cardiff City owner Sam Hammam is rumoured to be deadly serious about taking Speed to Ninian Park as the Bluebirds push for a second consecutive promotion, but refused to comment on the story.
"I'm not saying one way or the other," he said. "You know full well I never speak about transfer issues until a deal is done and dusted."