Australia's Macquarie Group $Macquarie(MQG.AU)$ is set to inject up to $5 billion into $APPLIED DIGITAL CORP(APLD)$ , securing a 15% stake in the company.Boosted by this news, $APPLIED DIGITAL CORP(APLD)$'s shares soared over 15% in pre-market trading on Tuesday.APPLIED DIGITAL CORP is scheduled to release its second-quarter earnings after the market closes on Tuesday, with investors eagerly anticipating the results.Macquarie's asset management subsidiary has finalized an agreement:To invest up to $900 million in the data center campus project of APPLIED DIGITAL CORPlocated in North Dakota.In addition, the subsidiary holds the right of first refusal to invest a