Australian Bloodstock will hold an open day at Yarramalong, a short drive from Wyong racecourse, on Sunday where it will offer shares in yearlings to be trained at the Weir stables at Ballarat and Warrnambool.
Police said the three men arrested would be questioned over "sporting integrity matters".
Police say the allegations include obtaining financial advantage by deception, engaging in conduct that corrupts a betting outcome and use of corrupt conduct information for betting purposes as well as animal cruelty.
"What I can say is, in the context of the conducted energy devices or the jiggers, clearly the allegation is that they may be used against a horse with the aim of improving their performance on a particular raceday".
Racing Victoria said it had been investigating several people and had sought the help of police.
The raid on Darren Weir conducted this morning by Police has been blasted not only around Australia but around the world thanks to the wonderful coincidence of the media showing up to film the raid.
Police indicated that the investigations are ongoing and that they are looking into whether any offences have been committed.
"In saying that we also throw our full support behind the stewards and Victoria Police and will assist them in any way we can".
The company was happy to keep supporting Weir because the trainer has not been charged with an offence despite hours of police questioning on Wednesday.
The message, sent by the stable's business manager Mick Leonard, explained: "As you are most likely aware, Darren Weir Racing is the subject of an external review".
"Racing Victoria's primary objective is to protect the integrity of the sport. and ensure a level playing field for all", he said.
Police said they had seized a firearm, taser and other items from the stables in the cities of Warrnambool and Ballarat.
Speaking on RSN927's Racing Pulse on Thursday, Racing Victoria's integrity chief Jamie Stier assured listeners that the situation would continue to be assessed "as more information becomes available". I can't go into the specifics that give rise to the circumstances of each one of those charges because of the complexity of this investigation and because it still is ongoing.
In 2007, trainer Paul Preusker and jockey Holly McKechnie were disqualified for four and three years respectively for using a jigger on horses during trackwork. He is Australia's most prolific and successful trainer.