On May 15, 2026, Bill Ackman made an announcement that sent shockwaves through the financial world: His hedge fund Pershing Square had built a $2.1 billion position in Microsoft — and he did it in February, right when everyone else was selling in panic.
The timing wasn't a coincidence. Microsoft had just reported weak quarterly earnings, cloud growth disappointed, and the stock took a hit. Investors were nervous about the massive capital expenditures — $190 billion Microsoft planned to spend in 2026 on AI and cloud infrastructure. For most people, that looked like a warning sign.
The Story Behind the Trade
For Ackman, it looked like an opportunity. He bought Microsoft at roughly 21x forward earnings — basically in line with the market multiple and well below the historical premium Microsoft typically commands. For context: In prior years, Microsoft regularly traded at 25x to 30x forward earnings.
To fund the Microsoft position, Ackman sold 95% of his Alphabet stake — which he'd bought three years earlier at an average of $94 per share and which now stood at $392. A classic rebalancing move: take profits on the position that's run, and rotate into the position that's under pressure.
Microsoft immediately became the fourth-largest position in Pershing Square's portfolio — 15.3% of the entire $13.71 billion book. This isn't a small bet. This is a core conviction.
What This Means for You
Ackman isn't just any investor. He's known for making large, concentrated bets — and for being patient. When he puts $2.1 billion into a stock, it's not for a two-week trade. It's for a structural thesis that plays out over years.
His thesis: Microsoft 365 (Word, Excel, Teams) and Azure (the cloud platform) are two of the most valuable franchises in the world. Azure is growing at 43% per year — the fastest growth in years. Microsoft 365 Copilot (the AI integration in Office) has 30 million paid seats — up from 20 million six months ago.
And the $190 billion Microsoft is spending in 2026? For Ackman, that's not a problem — it's an investment in future growth. Whoever builds the best AI datacenters today wins the cloud wars of the next decade.
The risk: If AI demand collapses or pricing falls, those massive investments could weigh on returns. But Ackman believes the opposite will happen.
How the Pros Are Reacting
After Ackman's announcement, at least nine brokerage houses raised their Microsoft price targets. Hedge funds remain bullish: In Q1 2026, 282 hedge funds held Microsoft — more than almost any other Mag-7 stock except Amazon.
Interestingly: Ackman isn't the only one betting on Microsoft right now. Other large institutional investors have also increased their positions after the stock fell in February. The pattern is classic: When a fundamentally strong stock sells off for emotional reasons, the pros step in.
Ackman himself wrote in his X post that he views Microsoft as significantly undervalued — with potential upside of 40% or more. His average entry price is around $350 (post-split adjusted). Today Microsoft trades around $450. If Ackman is right, he sees the stock somewhere between $500 and $550 in the next 12 to 18 months.
First Steps for Beginners
If you're wondering whether you should "copy" Ackman's trade: It depends on whether you share his thesis — and whether you have the time horizon. Ackman is a patience investor. He often holds positions for years, sometimes decades.
If you want to invest in Microsoft, ask yourself:
- Do you believe cloud computing and AI will dominate the next ten years?
- Do you believe Microsoft Azure can win against Amazon AWS and Google Cloud?
- Do you have the stomach to hold a position even if it falls 10% or 20%?
If the answer is yes three times, Microsoft might be interesting for you. If not, skip it. There's no obligation to copy every trade the pros make.
And don't forget: Ackman has a diversified portfolio. Microsoft is 15% of his book, not 100%. If you invest in individual stocks, you should spread the risk — never bet everything on one card.
Disclaimer: This article is for informational purposes only and does not constitute investment advice. Past performance is not indicative of future results.