Ackman loads $500M+ into Microsoft after 15% selloff, exits Hilton clean

Bill Ackman's Pershing Square Holdings disclosed a new $500 million-plus Microsoft position in its May 15 Form 13F, establishing the stake during the stock's 15% first-quarter decline. The fund simultaneously exited Hilton Worldwide Holdings entirely and reduced its Alphabet position by roughly one-third. The Microsoft entry marks Ackman's first meaningful technology hardware position since the firm's brief 2019 Apple stake.

The 13F shows Pershing acquired approximately 1.2 million Microsoft shares at an average cost basis near $412, concentrating the purchase in late February and early March as AI infrastructure concerns drove selling pressure across hyperscale cloud operators. The fund's Hilton exit liquidated a $340 million position held since 2018, while the Alphabet reduction trimmed exposure from $1.1 billion to roughly $720 million. Pershing's total disclosed equity holdings stood at $11.8 billion as of March 31, down from $12.4 billion at year-end.

The timing matters because Ackman is trading structural moat for cyclical dislocation. Microsoft entered Q1 with Azure revenue growth decelerating to 29% year-over-year, down from 35% in the prior quarter, as enterprise customers delayed AI infrastructure commitments amid economic uncertainty. The stock traded at 23 times forward earnings when Pershing bought, a 14% discount to its five-year average multiple and the widest valuation gap since the 2022 Federal Reserve tightening cycle. Ackman is betting the M365 Copilot rollout and the Azure consumption model create a $80 billion incremental revenue opportunity by fiscal 2028, a figure supported by Microsoft's internal adoption data showing 60% of Fortune 500 companies piloting generative AI workloads.

The Hilton exit signals portfolio construction discipline rather than hospitality sector concerns. The hotel operator reported 92% first-quarter occupancy and $58 average daily rate growth, both above pre-pandemic levels, but Pershing appears to be reallocating capital toward technology positions with asymmetric upside in a deflationary AI deployment cycle. The partial Alphabet sale, by contrast, reflects margin compression risks as the company commits $75 billion to 2026 capital expenditure, primarily GPU clusters for LLM training infrastructure that may not generate returns until 2028 or later.

Allocators should monitor Microsoft's June 12 Azure consumption data release and the company's fiscal Q4 earnings call scheduled for July 23, when management will disclose Copilot enterprise adoption rates and provide updated fiscal 2027 capital expenditure guidance. Pershing typically holds concentrated positions for 18-36 months, suggesting Ackman expects meaningful Microsoft share price appreciation by late 2027. The fund has also filed a Schedule 13D amendment indicating potential Board engagement discussions, though no activist campaign has been announced.

The 13F shows a manager trading near-term hotel margin certainty for long-duration AI infrastructure optionality at a $412 entry point most institutional buyers missed.