Bill Ackman's Herbalife short
TL;DR
In December 2012, Bill Ackman's Pershing Square Capital Management publicly disclosed a roughly $1 billion short position in Herbalife (NYSE: HLF), alleging the company operated as a pyramid scheme. The campaign ran for nearly six years and included regulatory testimony, public presentations, congressional letters, and ultimately a loss when Ackman closed the position in February 2018. The trade is one of the most-documented public-activism short campaigns in modern markets.
The Herbalife campaign was unusual in being conducted almost entirely in public. Ackman's 342-slide December 2012 presentation, his testimony to the FTC, and Pershing Square's subsequent disclosures created a multi-year public-record case study in activist shorting — and in the asymmetries between short positioning, public-relations campaigns, and market dynamics.
The thesis (December 2012)
Ackman's public presentation argued Herbalife was a pyramid scheme operating as a multi-level marketing company. The core claims:
- Distributor economics — the overwhelming majority of distributors lost money or earned negligible amounts
- Recruitment-driven structure — distributor commissions depended primarily on signing up new distributors, not selling product to genuine consumers
- Inventory loading — distributors at higher tiers earned commissions on inventory purchased by lower-tier distributors, regardless of whether that inventory ever reached actual consumers
- FTC vulnerability — Ackman argued the FTC would eventually classify Herbalife as a pyramid scheme under the Koscot precedent and shut it down
The counter-trade — Carl Icahn long
Within weeks of Ackman's short disclosure, Carl Icahn announced a long position in Herbalife. Icahn ultimately accumulated approximately 24% of the company across 2013-2018, becoming the largest single shareholder. The Icahn- Ackman confrontation included a famous CNBC live exchange in January 2013.
Other activists took sides: Daniel Loeb's Third Point was briefly long; Bob Chapman's Chapman Capital was long; Stiritz's position varied. The Herbalife trade became a multi-activist battleground where 13D filings from opposing managers told the public-record story of who was on which side at any given moment.
The FTC settlement (2016)
In July 2016, the FTC settled with Herbalife. The settlement required:
- $200 million payment to former Herbalife distributors
- Restructuring of the compensation plan to tie commissions to verified retail sales (not just distributor purchases)
- Reduced reliance on inventory-loading-style sales
The FTC did NOT classify Herbalife as a pyramid scheme — the core legal claim in Ackman's thesis. This was the inflection point that materially undermined the short thesis. The stock did NOT crash to zero; Herbalife continued operating; Pershing Square's mark-to-market position deteriorated.
The unwind (February 2018)
On February 28, 2018, Pershing Square disclosed it had closed the Herbalife short. Ackman publicly acknowledged the position had ended at a substantial loss. The cumulative cost is generally estimated by analysts at hundreds of millions of dollars — interest costs, premium-pay on the put options that replaced direct shorts late in the campaign, and the mark-to-market loss itself.
The disclosure ended one of the most-watched short campaigns in modern public markets. Herbalife stock subsequently traded higher; Carl Icahn exited his position in 2021 at material gain.
What this reveals about 13F-tracking
Like Burry's subprime short, the Ackman Herbalife short was NOT visible on Form 13F. Short positions are excluded from the 13(f) securities list. The Pershing Square 13F filings during the 2012-2018 period showed the LONG side of the book — primarily concentrated long positions in Restaurant Brands, Mondelez, Lowe's, and other names. The Herbalife short was visible only through:
- Pershing Square's public investor letters and Q&A sessions
- The December 2012 presentation (released publicly)
- Subsequent FTC and congressional testimony
- 13D filings from the OTHER side (Icahn's long disclosures)
- Pershing Square's later put-option positions (which DID appear on 13F as derivatives, late in the campaign)
Our view
The Herbalife campaign is the case study for why short-side activism is structurally different from long-side activism. Long activists have time on their side; positions can ride out multi-year drawdowns. Short activists pay quarterly costs (borrow, premium, regulatory friction) that compound while waiting for the thesis to play out. Even when the underlying thesis is partially correct — Herbalife DID get FTC settlement, did restructure compensation — the trade can still lose money if the path to thesis-realization is too long or partial.
For HoldLens tracking purposes, the Pershing Square 13F during the campaign is itself instructive: it shows what Ackman was buying with the cash NOT committed to Herbalife shorts. The complete picture of Ackman's positioning required reading the 13F long-side AND the public-record short side. 13F alone never told the whole story.
Pure-reference encyclopedic entry for Form 13F + 13D activist filings on our sister site: secfilingdex.com/learn/13d-vs-13g — 13D filings from both sides of the Herbalife battle are catalogued there.
Foundational reading on activist investing
The Ackman-Herbalife saga is referenced in essentially every modern activist-investing primer. Graham, Lynch, Munger — the foundations.
Bookshop.org affiliate links — HoldLens earns a 10% commission if you buy, at no extra cost to you. Bookshop.org is the indie-bookseller consortium that supports local bookstores. These are the books we actually recommend. Always do your own research.
Not investment advice. Historical analysis from public 13F + 13D filings, investor letters, FTC settlement documents. Methodology.
Cite this page
Researchers, journalists, and Wikipedia editors — citation formats load with the page. HoldLens content is freely available for reference; please cite.
Six historical trades reconstructable from SEC EDGAR alone. Each essay traces the trade through 13F + Form 4 + DEF 14A filings.
Berkshire's 1988-89 KO purchase — $1.3B → ~$28B, untouched 37 years.
Berkshire's 2016-onward AAPL accumulation — largest equity position in firm history.
The $5B preferred + 700M-share warrants at $7.14 strike. ~$13B paper gain at 2017 exercise.
Scion Capital's 2005-2008 subprime CDS trade — ~489% net return.
September 16, 1992. The single-day macro trade that broke the Bank of England.
1997-2023 hold + board seat — the canonical long-duration value position.
2013-2016 long-side activism — public letter to Tim Cook, ~$2B realized gain.
See Pershing Square's current holdings on HoldLens
Live Pershing Square 13F dossier — Ackman's current long positions. Sister property cataloging every form variant: SecFilingDex.