Jets owner Con Constantine would take over the Knights today if they let him.

The multimillionaire businessman has long been keen to preside over a Newcastle sporting super-club, operating the Knights in the National Rugby League and the Jets in the A-League.

If the Knights were to draw up a short list of potential benefactors, Constantine, racehorse and property owner Nathan Tinkler, and media mogul and racing identity John Singleton would be among the first names on it.

Constantine was one of the Knights' most influential sponsors earlier this decade and, during that period and in the years since, he has made several offers to buy the club.

Despite an ongoing wrangle with the NRL club over a sub-lease agreement for the Jets to use EnergyAustralia Stadium, Constantine still wants to "do the right thing" by the Knights.

"I've always done the right thing by the club, and I want the club to succeed," Constantine said.

"In 2002 I told [former Knights chairman] Michael Hill, it's only a matter of time. I said, 'I know that you're the chairman, Michael, but let me put it to you straight up and down it's only a matter of time before the club has got to go privatised'.

"It's got to happen. Every other club around the world, all the big clubs, are privatised. I've made the offer, and I make the offer again let's join forces, without even taking them over. I said let's join forces and get this over the line and work together.

"I'm not out there to undermine the Knights. I don't believe in that.

"I believe we have two clubs in the city of Newcastle, and one is a winter sport and the other one is a summer sport.

"How good is that, mate. We should be the proudest city in Australia because we benefit from both sporting codes, and all we're doing at the moment is attacking each other."

Tinkler is a Knights fan who has put his money where his mouth is, sponsoring the club through his Hunter Valley horse stud Patinack Farm. Boasting a fortune of $426 million, the former Muswellbrook electrician was ranked No.32 on the BRW rich list in May.