Billionaire Bill Ackman’s Pershing Square makes moves on Berkshire Hathaway aspirations Investing FTSE 100 trust Pershing Square has made further steps towards billionaire manager Bill Ackman’s aspiration to emulate Berkshire Hathaway by building a diversified holding company. Pershing Square Capital Management, which runs the investment trust, has made a further $900m investment into property company Howard Hughes, bringing Ackman’s stake in the firm to 46.9 per cent. [...]