Also mentions Square:
Larry Summers May Have just Violated Square’s Pre-IPO Quiet Period ($SQ)
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Bill Ackman on Becoming an Activist Investor

gurufocus.com

Pershing Square founder Bill Ackman (Trades, Portfolio) has achieved phenomenal levels of success during his time on Wall Street. However, it hasn’t always been a straight line up, with the activist investor suffering a number of major setbacks...

Mentions: Square Founder Board of Directors