Markets & Economy Billionaire Bill Ackman Trimmed This Big Tech Position to Back These 2 AI Contenders September 13, 2026 · 4:50 pm 1 sources Image: Yahoo Finance ad slot · in-content video 16:9 Coverage More coverageBillionaire Bill Ackman Trimmed This Big Tech Position to Back These 2 AI ContendersYahoo Finance · September 13, 2026 16:50