June was one of the ugliest months in years for the mega-cap AI leaders and billionaire investor Bill Ackman chose exactly that moment to plant his flag on the bull side.

On Tuesday, Ackman amplified a widely shared post on X by analyst Rihard Jarc, who writes the UncoverAlpha newsletter, adding that it was "an important read on the hyperscalers and why we are bullish." The call came as Microsoft Corp.

(NASDAQ:MSFT) logged its worst month since December 2000, falling 17.2% in June and Oracle Corp.

(NYSE:ORCL) fared even worse, plunging 35% and notching the stock's worst month since September 1990.

Other famous hyperscalers such as Amazon.com Inc.