Bill Ackman’s Warren Buffett blueprint: Is hedge fund founder adopting the Oracle of Omaha’s playbook?

Few Wall Street investors are willing to rewrite the playbook that made them famous. Bill Ackman appears to be doing exactly that. For two decades, Ackman built a reputation as one of America’s most aggressive activist investors, taking large, concentrated positions in public companies and publicly pushing for change.

Now, the Pershing Square Capital Management founder is reshaping his firm around a slower, more patient philosophy modelled on Warren Buffett, the “Oracle of Omaha” whose Berkshire Hathaway became one of the most successful investment vehicles in history.