Bill Ackman, manager of Pershing Square hedge fund, revealed a significant strategic move in the 13F filings for the first quarter of 2026 (reported on March 31, 2026): opening a new position in Microsoft ($MSFT) valued at a massive $2.1 billion. Concurrently, Ackman sold all his holdings in Hilton Worldwide Holdings Inc. ($HLT), a position previously valued at $870 million.

The entry into Microsoft, one of the world's largest and most influential technology companies, indicates Ackman's strong belief in its growth potential, possibly driven by the development of artificial intelligence and its strengthening position in the cloud market. The move also reflects a shift in Pershing Square's capital allocation, with a substantial move from the hospitality sector towards technology.

For individual traders, moves by investors like Ackman can indicate broader market trends. The focus of a fund of this magnitude on a company like Microsoft suggests deep valuation and significant potential. However, it is important to remember that 13F filings are published with a delay of up to 45 days, and that hedge fund strategies are complex and often include hedging and short positions that are not disclosed in this report.