Horse Racing Ireland have voided the registrations of all horses owned by the Supreme Horse Racing Club.
It comes after the failure of the club's trustee to provide information which was requested by HRI following allegations of financial impropriety by members of the syndicate.
The group is now blocked from running horses in Ireland.
"Horse Racing Ireland has consistently sought, and not received, the requested complete members’ information for horses running under Supreme Horse Racing Club," Irish racing governing's body confirmed in a statement.
"Despite repeated requests, Supreme Horse Racing Club has failed to provide the members’ details required under Horse Racing Ireland Directive 15 Racehorse Ownership, and as a result of not receiving this requested information, HRI is unable to stand over the shareholding of each horse - a fundamental aspect of any owner registration.
"After consulting with our legal advisors, the decision has been taken to void the owner registration for all horses run under Supreme Horse Racing Club in accordance with powers under HRI Directive 15 and Rule 123 (iv) of the Rules of Racing.
"Horse Racing Ireland is disappointed that it is necessary to take this step but due to the lack of engagement and failure to provide the necessary information there is no alternative but to withdrawapproval of the Club and to cancel its registrations as a recognised Club.
"Following complaints from Supreme Horse Racing Club members, and the introduction of Directive 15 - Racehorse Ownership in July, HRI met with Supreme Horse Racing Club Trustee Steve Massey on 31 July, 2019. At that meeting there was a commitment by Supreme Horse Racing Club to file the necessary paperwork with HRI.
"There was repeated correspondence in August, September and October, seeking members’ information from Supreme Horse Racing Club, which yielded no or inadequate responses.
"With further concerns having been raised with HRI over the administration of the Club, on 7 October HRI notified Supreme Horse Racing Club that no withdrawals could be made from the Club’s HRI account until full members’ details were provided. This request was reaffirmed on 17 October and with limited information forthcoming from Supreme Horse Racing Club, the Club’s owner registration was suspended on 22 October.
"A meeting was arranged with the Club’s Trustee, Steve Massey, for 4 November which he failed to attend without explanation. No subsequent correspondence has been received, including in response to a final deadline this week, and Horse Racing Ireland has therefore made the decision to void the Club’s registrations."
The SHRC owns 29 horses including the current Cheltenham Gold Cup favourite, Kemboy.