Bill Ackman Bets Big on Microsoft Against AI Skepticism

Billionaire investor Bill Ackman is placing a contrarian bet on Microsoft, defying current market fears regarding AI expenditures and slowing cloud growth. Pershing Square Capital Management has been quietly building a position since February, capitalizing on the panic that followed earnings reports.

Quiet Accumulation and Valuation Play

Pershing Square initiated its buying spree after Microsoft's stock dropped nearly 10% following its Q2 earnings, a period marked by missed cloud growth targets and rising capital costs. Ackman saw this market overreaction as a prime entry point into a core asset.

■The fund established the position at a forward earnings multiple of 21x.

■This valuation is broadly in line with the market multiple but sits well below Microsoft's trading average of recent years.

■Ackman disclosed the stake on X ahead of the quarterly 13F filing, labeling it a "core holding" without specifying the size.

The $190 Billion Capex Defense and Hidden OpenAI Value

While investors fret over Microsoft's projected $190 billion capital expenditure budget for 2026, Ackman argues this is a J-curve growth investment rather than a margin threat. He also highlights a significant undervaluation in Microsoft's stake in the AI revolution.

■Microsoft's 27% economic interest in OpenAI is worth an estimated $200 billion at the startup's recent valuation.

■The Microsoft 365 productivity suite is described as "deeply embedded" in enterprises and "nearly impossible to replicate."

■The restructuring of the OpenAI partnership is viewed not as a loss of exclusivity, but as a strategic pivot to a multi-model architecture.

A Historical Pattern of Buying Tech Fear

This move continues Ackman's strategy of stepping into Big Tech during periods of AI-induced skepticism, following previous successful entries into other major tech stocks.

■Alphabet was acquired when the stock slumped after the release of ChatGPT in late 2022.

■Amazon was bought in the weeks following "Liberation Day."

■Meta was added recently when the market reacted negatively to its unexpectedly large capex guidance.

Ackman's bet is essentially a bet on the physical infrastructure of AI. Microsoft's projected $190 billion capex implies massive procurement orders for Nvidia GPUs and TSMC foundry capacity in the coming years. This investment validates the thesis that the semiconductor supply chain, dominated by players like ASML and TSMC, will remain the bottleneck and primary beneficiary of the AI build-out, regardless of software model fluctuations.