Tinkler, who took control of the club in 2010 from Con Constantine, confirmed news of the sale to Sydney's Sky Sports Radio on Friday, a subsidiary of Sky Racing, before revealing HSG has been in talks with foreign-based investors, including clubs in England and Germany.
"German, Spanish, and English clubs are best placed to groom young talent in Australia," Tinkler said. "If we can do a deal with one of those countries it will put the Jets in a better spot and it will be a win for the community and everyone involved.
"We've been in talks with a number of Premier League and European clubs, they've been going on for a little while.
"Anyone that supports or owns an A-League would understand that is the future. The transfer fees paid by the big European organisations could run an A-League club."
Tinkler relinquished control of NRL club Newcastle Knights in May in far more acrimonious circumstances, fueling speculation a similar move would happen with the A-League club.
At the time, the Jets asserted it was 'business as usual' and that it remained unaffected by what happened with the rest of the HSG portfolio.
A statement on Friday from HSG claimed it will continue to underwrite the club's day-to-day operations until the sale goes through, with the backing of Football Federation Australia (FFA).
"We have been in discussions with HSG for some time about brining in additional investment in and this process will now be expedited," Newcastle Jets CEO Robbie Middleby said.
"Until the change of ownership is complete, we will continue to execute our plans in preparation for the 2014/15 season.
"The club has been rebuilt since 2010 and we now have a solid foundation from which to grow.
"We look forward to securing new owners and moving forward with this new chapter."
An FFA statement read: "Football Federation Australia has previously noted comments from Nathan Tinkler regarding the ownership of the Newcastle Jets.
"FFA continues to have regular positive dialogue with the Newcastle Jets about operational and business matters.
"FFA is comfortable with the Newcastle Jets' plans for the Hyundai A-League 2014-2015 season and beyond."