The Transformation
of an Activist.
From Gotham Partners to Pershing Square, from the Valeant abyss to the greatest trade of 2020 — thirty years of letters, presentations, speeches, and interviews, mapped into one knowledge graph.
Browse Sources →Four Acts
Gotham Years
1992–2003A Harvard MBA starts Gotham Partners with a classmate, learns value investing the Graham way, and picks a fight with MBIA that takes a decade to be proven right.
Golden Era
2004–2014Pershing Square is born. Wendy's, McDonald's, Canadian Pacific, General Growth — the eight commandments of activism, executed to near perfection.
The Valley
2015–2018Valeant collapses, Herbalife becomes a five-year public war with Carl Icahn, and the fund bleeds billions. Hubris, concentration, and the cost of conviction.
Renaissance
2019–presentThe activist goes quiet. A $27M COVID hedge returns $2.6B, the portfolio turns to simple, predictable, free-cash-flow compounders — and the story comes full circle.
The Essential Texts
Pershing Square Holdings Annual Report 2020
The 2020 annual report documents Pershing Square's most celebrated trade: a $27 million credit default swap position that returned $2.6 billion in three weeks as COVID-19 triggered a market collapse. Ackman details the thesis (not a market short, but a portfolio hedge), the specific CDS instrument chosen, and the controversial CNBC appearance where he tearfully warned that hell was coming. He then explains why he immediately redeployed all proceeds back into equities — and why his long book performed extraordinarily well as a result.
Canadian Pacific Railway: The Case for Change
The full activist thesis on Canadian Pacific: an underperforming railroad with world-class assets run at industry-worst efficiency, fixable by installing Hunter Harrison and his precision scheduled railroading model. The presentation lays out the operating ratio gap, the network analysis, and the specific operational playbook Harrison would execute. The ensuing proxy victory and operational transformation became the canonical proof of the right-CEO thesis — Ackman's finest activist campaign.
Who Wants to Be a Millionaire? — Herbalife Presentation
The most famous short-selling presentation in modern hedge fund history. Over 334 slides, Ackman forensically dismantles Herbalife's business model, arguing it meets the legal and structural definition of a pyramid scheme: an unsustainable network that extracts money from distributors rather than from external retail customers. The presentation sparked a years-long battle with Carl Icahn, triggered an FTC investigation, and created the largest public short debate in financial history.
Ackman vs. Icahn: The Live CNBC Showdown
Carl Icahn calls into CNBC while Ackman is on air, and what follows is thirty minutes of unscripted financial warfare: accusations, a decade-old grudge over a 2003 deal, and two irreconcilable views of Herbalife and of what activist investing is for. The broadcast turned a short thesis into a personal saga and guaranteed that the Herbalife trade would be fought in public to the end. It remains the most watched moment of either man's career.
Hell Is Coming
In an emotional, nearly half-hour CNBC appearance at the peak of the COVID panic, Ackman warns that hell is coming, urges an immediate national shutdown, and discloses that Pershing Square has profited enormously from credit hedges. Widely condemned in the moment as fear-mongering from a positioned trader, the interview looks different in full context: he was simultaneously pleading for the policy response that would — and did — save the economy, and buying stocks aggressively with his hedge proceeds. Three weeks later the trade was closed for $2.6 billion.
The Ackman Framework
Concepts ranked by frequency of appearance across all sources.