Bill Ackman Is Piling In Again — Pershing Square’s Newest Big Bet

Bill Ackman's Pershing Square Capital Management began accumulating Microsoft (NASDAQ:MSFT) shares successful February 2026 aft the banal slid connected its fiscal second-quarter report. Impressively, Akman has since built the involvement to astir $2.4 cardinal by the extremity of May 2026, funded successful portion by trimming his Alphabet (NASDAQ:GOOG) position.

Ackman disclosed the presumption successful a lengthy station connected X up of Pershing Square's quarterly 13F filing, describing Microsoft arsenic a "core holding." Separately, Fortune reported connected June 25, 2026 that Pershing Square has been gathering an Amazon (NASDAQ:AMZN) involvement from scratch since astir mid-2025, and that the astir $2.4 cardinal presumption is present the firm's second-largest holding.

What Ackman Bought, and Why It Matters

Two mega-cap tech names present beryllium adjacent the apical of a portfolio historically built connected concentrated, activist-flavored positions successful user and existent property names. The Microsoft introduction was timed to weakness, with MSFT banal trading close astir $392 per stock (down astir 20% connected a year-to-date basis), and good beneath its 200-day moving mean of $444.22. Ackman's nationalist rationale is that Microsoft banal had de-rated to astir 21x guardant net connected what helium framed arsenic overblown fears astir Azure durability and Microsoft's competitory presumption successful AI.

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The Amazon thesis is simply a valuation-plus-AI story. The company's halfway nett halfway (AWS) grew 28% twelvemonth implicit twelvemonth successful the March quarter, its fastest maturation successful 15 quarters, connected a 37.7% operating margin. Amazon's customized Trainium and Graviton silicon crossed a $20 cardinal yearly tally rate, and the institution has locked successful landmark commitments for up to 2GW of Trainium capableness for OpenAI and 5GW for Anthropic.

Ackman is acold from unsocial here. Other notable billionaires and hedge funds including David Tepper, Seth Klarman, Al Gore's Generation Investment Management, and Sanders Capital person been accumulating Amazon successful caller filings.