Bill Ackman is one of the most followed billionaire investors in the United States, and for good reason. His Pershing Square hedge fund has a strong history of delivering market-beating returns for investors.

Unlike some of the other popular billionaire investors, Ackman takes a more concentrated approach to Pershing's portfolio. In fact, there are only 10 stocks in it.

Person looking at financial charts on screen.

Image source: Getty Images.

Bill Ackman's 5 biggest stock holdings

I won't keep you in suspense. Here are Ackman's five largest stock holdings right now, according to Pershing Square's latest 13-F filing:

Company (Symbol)

Market Value

Percentage Ownership

When Did Ackman First Invest?

Uber

$2.83 billion

1.45%

Q1 2025

Brookfield Corp

$2.55 billion

9.81%

Q2 2024

Alphabet

$2.07 billion

0.20%

Q1 2023

Howard Hughes Holdings (HHH 0.77%)

$1.93 billion

46.9%

2010

Restaurant Brands International

$1.52 billion

7.11%

Q4 2014

Data source: Pershing Square SEC Filings. Market value, ownership percentage as of 6/30/2025.

One interesting takeaway is that Ackman's three largest positions are all relatively new and were added to the portfolio within the past few years. It's worth noting that Ackman significantly increased the Howard Hughes stake during the second quarter in a deal that also saw Ackman become executive chairman of the business.

As a final thought, it's not a great idea to buy these -- or any other -- stocks just because a billionaire investor owns them. Ackman and Pershing Square's clients generally have a higher risk tolerance than the average investor, so keep this in mind.

However, looking at what billionaires are putting their own money into can be an excellent starting point to help you find stocks. Take a closer look at these stocks to see if they might be a good fit for you.