Due to laws and regulations overseen by the Securities and Exchange Commission (SEC), large asset managers are required to publicly disclose their equity positions within 45 days of a quarter's end. For the retail investor, this is a potential gold mine of possible stock ideas.

One well-known hedge fund manager, Bill Ackman, who heads Pershing Square Capital Management, is closely watched. His track record has made him somewhat of an investing legend. He runs a concentrated book of what he and his team believe are outstanding companies.

After quickly glancing at the $10.4 billion portfolio, you'll see that there's one business that makes up more than 18% of the assets. This magnificent growth stock has soared 316% in just the past five years. Let's try and figure out what Ackman likes about this company before answering whether it makes for a worthy investment today.

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Source Fool.com