5 Best Stocks to Buy Now According to Billionaire Bill Ackman

3. Amazon.com, Inc. (NASDAQ:AMZN)

Amazon.com, Inc. (NASDAQ:AMZN) is included in our list of the 9 best stocks to buy according to billionaire Bill Ackman, representing 14.28% of the total portfolio.

During Q4 2025, billionaire investor Bill Ackman increased his exposure to the company. He held more than 9.61 million shares as of the quarter-end after acquiring 3.78 million shares during the quarter. The position was valued at over $2.22 billion, making Amazon.com, Inc. (NASDAQ:AMZN) the third-largest holding in Pershing Square’s portfolio.

Pershing Square initially established its position in April 2025 during tariff-driven market volatility. In its latest Letter to Shareholders, the firm highlighted Amazon Web Services (AWS) and the company’s global e-commerce platform as category-defining businesses supported by strong secular growth trends. AWS continues to benefit from enterprise cloud migration and increasing demand for AI infrastructure, according to Bill Ackman.

Amid Ackman’s optimism surrounding the stock’s outlook, institutional sentiment around Amazon.com, Inc. (NASDAQ:AMZN) also strengthened during the quarter. The number of hedge funds holding positions in the stock climbed to 381 from 332, with their combined stake rising to approximately $88.7 billion, up from $73.35 billion, according to Insider Monkey’s database. The overall optimism reflects the company’s ongoing efforts to lead the AI race.

In contrast to the positive sentiment, recent insider activity raises uncertainty. In the last week of February alone, a significant number of insider trades took place, totaling $13 billion in sales, according to Yahoo Finance. The massive selling activity was seen ahead of Amazon.com, Inc. (NASDAQ:AMZN)’s strong fourth-quarter results and new $21 billion investment in Spain for data centers and AI.

Amazon.com Inc. (NASDAQ:AMZN) operates across e-commerce, digital content, advertising, and cloud computing. Its online and offline stores offer both in-house and third-party products, while its Amazon Web Services (AWS) division runs one of the world’s largest data center networks..