The encyclopedia · Finance & Accounting · Financial decision · 2011
HP paid $11B for Autonomy, then wrote off $8.8B over cooked books
HP bought a UK software firm at a 79% premium to pivot into software. Within a year it took an $8.8B charge, alleging Autonomy's books were inflated.
HP · Autonomy · 2011-08-18
What happened
On August 18, 2011, Hewlett-Packard announced it would buy Autonomy, a Cambridge software firm built on search and analytics, for $42.11 a share — a premium of roughly 79% that analysts called absurdly high. HP, then led by CEO Léo Apotheker, wanted to pivot away from low-margin hardware toward software and services. The deal closed on October 3, 2011, by which point Meg Whitman had taken over as CEO. Autonomy's founder Mike Lynch, hailed as Britain's answer to Bill Gates, walked away with an estimated $800 million.
Within a year the story had curdled. Autonomy's revenue fell, Lynch departed in May 2012, and in November 2012 HP announced an $8.8 billion write-down — most of Autonomy's purchase price — alleging 'serious accounting improprieties' and 'outright misrepresentations' by Autonomy's former management. HP's share price dropped to a decades-low. Lynch and his team fired back, blaming HP's own mismanagement and noting that outsiders saw only a small part of the charge as genuine accounting misstatement; the rest, they argued, was simply HP overpaying.
The fallout ran for a decade. Britain's Serious Fraud Office investigated and dropped out in 2015; US authorities pressed on. Autonomy's former CFO Sushovan Hussain was convicted of fraud in 2018 and sentenced to five years. Lynch was extradited to the US, stood trial in San Francisco in 2024, and was acquitted on all counts. In a separate UK civil case, a judge ruled in 2022 that HP had 'substantially won' its fraud claims against Lynch and Hussain. Autonomy's auditor Deloitte was fined £15 million for 'serious and serial failures.'
Why it happened
- HP paid a ~79% premium in a rushed strategic pivot to software, and its due diligence leaned on Autonomy's own figures rather than independently verifying revenue quality.
- Warnings were visible early: analysts called the price absurd, HP's own CFO disagreed with it, and Autonomy's reporting had been questioned publicly since 2009.
- Integration was chaotic and the cultures clashed, so HP lacked the visibility to understand Autonomy's real performance until after the money had moved.
- The decade-long dispute over how much was fraud versus overpayment shows the deal failed on price and judgment, not just accounting.
The lesson
Due diligence that relies on the target's own numbers is not diligence. Independently verify revenue quality before paying a premium — desperation to 'pivot' is exactly when shortcuts hurt most.
Aftermath
HP never recovered the value: it later sold Autonomy's pieces to OpenText and Micro Focus for a fraction of what it paid. The saga became a textbook case in M&A hubris — paying a huge premium for a strategic pivot, trusting the target's own numbers, and learning the truth only after closing. It also spawned a decade of litigation across two countries and cost Deloitte its reputation on the account.
Sources
- Autonomy Corporation — Wikipedia (HP acquisition, $8.8B write-down, litigation)
- Mike Lynch — Wikipedia (Autonomy founder; fraud trial and acquittal)
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