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  • September 2015 (Revised September 2017)
  • Case

Pershing Square 2.0

By: Robin Greenwood, Samuel Hanson and David Biery
In June 2015 William A. Ackman, the CEO and founder of New York hedge fund Pershing Square Capital, reflects on the success of the fund he has spent over a decade building. Since its inception in 2004, Pershing Square's assets under management had grown from $500... View Details
Keywords: Activism; Value Investing; Portfolio Management; Management; Investment Portfolio; Investment Activism
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  • December 2018 (Revised February 2019)
  • Teaching Note

Pershing Square 2.0

By: Samuel G. Hanson
Teaching Note for HBS No. 216-003. View Details
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  • May 2012 (Revised November 2015)
  • Case

General Growth Properties and Pershing Square Capital Management

By: Arthur I. Segel, Stuart C. Gilson, Thomas Edward Follett Langer, Zubin Gopal Malkani and John Anthony Mascari
Keywords: Real Estate; Real Estate Industry
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  • September 2012
  • Teaching Note

General Growth Properties and Pershing Square Capital Management (TN)

By: Arthur I. Segel and Stuart C. Gilson
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  • June 2013 (Revised September 2015)
  • Case

Procter & Gamble

By: Jay W. Lorsch and Kathleen Durante

On July 12, 2012, Bill Ackman's Pershing Square Capital Management announced publicly that it had purchased about $2 billion of Procter and Gamble (P&G) stock. Shares in the company closed up 3.75% the day the disclosure was made public. Ackman told the New York... View Details

Keywords: Ackman; P＆G; Pershing Square Capital Managment; Disruption; Management Succession; Crisis Management; Acquisition; Consumer Products Industry; Financial Services Industry
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  • July 2021 (Revised December 2021)
  • Case

Pershing Square's Pandemic Trade (A)

By: Emil N. Siriwardane, Luis M. Viceira, Dean Xu and Lucas Baker
This case explores the decision that Bill Ackman, CEO and founder of the hedge fund Pershing Square Capital, was considering in late February 2020 about hedging the exposure of the fund’s portfolio from the potential financial fallout ensuing from an extreme event like... View Details
Keywords: Health Pandemics; Financial Liquidity; Cost Management; Decision Choices and Conditions; Risk Management
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  • January 2016 (Revised January 2019)
  • Case

The Allergan Board Under Fire (A)

By: Lynn S. Paine, Suraj Srinivasan, John C. Coates and David Lane
In 2014, the Allergan Inc. board of directors received a surprise takeover offer from Valeant Pharmaceuticals in alliance with hedge fund activist Bill Ackman's Pershing Square Capital Management. In the unprecedented arrangement between an acquirer and a hedge fund... View Details
Keywords: Allergan, Inc.; Valeant; Ackman; Pershing Square; Tender Offer; Activist Investors; Business Models; R＆D; Board Of Directors; Securities Litigation; Acquisition Strategy; Takeover Defenses; Hedge Funds; Shareholder Rights; Proxy Contest; Shareholder Special Meetings; Legal Issues In Contested Takeovers; Governing and Advisory Boards; Mergers and Acquisitions; Corporate Governance; Management Teams; Business and Shareholder Relations; Pharmaceutical Industry
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  • January 2016 (Revised January 2019)
  • Supplement

The Allergan Board Under Fire (B)

By: Lynn S. Paine, Suraj Srinivasan, John C. Coates and David Lane
In 2014, the Allergan Inc. board of directors received a surprise takeover offer from Valeant Pharmaceuticals in alliance with hedge fund activist Bill Ackman's Pershing Square Capital Management. In the unprecedented arrangement between an acquirer and a hedge fund... View Details
Keywords: Allergan, Inc.; Valeant; Ackman; Pershing Square; Tender Offer; Activist Investors; Business Models; R＆D; Board Of Directors; Securities Litigation; Acquisition Strategy; Takeover Defenses; Hedge Funds; Shareholder Rights; Proxy Contest; Shareholder Special Meetings; Legal Issues In Contested Takeovers; Corporate Governance; Investment Activism; Business and Stakeholder Relations; Business Model; Business and Shareholder Relations; Valuation; Pharmaceutical Industry
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  • August 2015 (Revised September 2015)
  • Case

Shareholder Activists and Corporate Strategy

By: David Collis and Ashley Hartman
By 2015, there had been an upsurge in activist shareholders arguing for radical changes in companies' corporate strategies. Personalities like Carl Icahn, Bill Ackman, and Daniel Loeb were feared and loathed in some quarters, celebrated in others. With nearly $120... View Details
Keywords: Scope; Activist Investors; Spin-offs; Synergy; Diversification; Consolidation; Hedge Fund; Corporate Strategy
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  • 05 Apr 2016
  • First Look

April 5, 2016

structuring. Purchase this case: https://cb.hbsp.harvard.edu/cbmp/product/216035-PDF-ENG Harvard Business School Case 216-003 Pershing Square 2.0 In June 2015 William A. Ackman, the CEO and founder of New... View Details
Keywords: Sean Silverthlorne
  • 09 Feb 2016
  • First Look

February 9, 2016

in alliance with hedge fund activist Bill Ackman's Pershing Square Capital Management. In the unprecedented arrangement between an acquirer and a hedge fund activist, Pershing... View Details
Keywords: Sean Silverthorne
  • 20 Aug 2013
  • First Look

First Look: August 20

Purchase this case: http://hbr.org/search/413126-PDF-ENG Harvard Business School Case 403-127 Procter & Gamble On July 12, 2012, Bill Ackman's Pershing Square Capital Management announced publicly that... View Details
Keywords: Anna Secino
  • 20 Oct 2015
  • First Look

October 20, 2015

feared and loathed in some quarters, celebrated in others. With nearly $120 billion in assets under management in 2014, and big players like Icahn Enterprises managing $22.3 billion, Pershing Square managing... View Details
Keywords: Sean Silverthorne

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