Bill Ackman's Pershing Square fund has concentrated over 25% of its portfolio in two AI stocks, raising questions about whether retail investors should follow his lead.

Billionaire investor Bill Ackman has made significant bets on two artificial intelligence companies through his Pershing Square hedge fund

These two AI stocks represent more than one-fourth of Ackman's total portfolio, indicating strong conviction in the AI sector

The concentration raises both opportunity and risk considerations for investors considering similar positions in AI-focused companies

Ackman's move reflects continued institutional confidence in AI as a transformative technology worth major capital allocation