Politics

Facebook was warned about Cambridge Analytica issues months earlier than previously disclosed

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Facebook CEO Mark Zuckerberg AP Photo/Andrew Harnik
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Facebook employees had been warned about allegations that Cambridge Analytica was misusing users' data from the social network months earlier than previously disclosed.

A court filing from the Washington DC attorney general made public this week said that a Facebook employee had raised issues about the political research firm in September 2015 — months before The Guardian's first report on it, in December 2015. (The exact nature of the DC-based employee's warning is unknown, as the legal filing is currently redacted.) 

The revelation is significant because Facebook has previously said that its leadership was not aware of the issues surrounding Cambridge Analytica prior to the initial December report. Cambridge Analytica had purchased tens of millions of users' data from a researcher for its political purposes, and following the 2015 report it was asked by Facebook to delete it.

The issue then erupted into an international scandal for Facebook in March 2018, following a subsequent report from The Guardian about how the data was not deleted, and used to target American voters. 

A Facebook spokesperson did not immediately respond to Business Insider's request for comment, but in a statement to The Guardian published Friday it denied that it had "misled anyone about this timeline."

Instead, the company said, the issues that were raised by an employee back in September 2015 were a "different incident" to the issues that were subsequently reported.

"In September 2015 employees heard speculation that Cambridge Analytica was scraping data, something that is unfortunately common for any internet service. In December 2015, we first learned through media reports that [researcher Aleksandr] Kogan sold data to Cambridge Analytica, and we took action. Those were two different things," the spokesperson said.

They added: "Facebook was not aware of the transfer of data from Kogan/GSR to Cambridge Analytica until December 2015, as we have testified under oath."

Facebook's statement means that, even if it didn't mislead lawmakers about when it became aware of the specific Cambridge Analytica scandal that has rocked the company over the past year, red flags were being raised internally about the firm months prior to those reports, and that Facebook failed to take action or subsequently disclose this publicly. 

Damian Collins, a British MP and outspoken critic of Facebook, tweeted: "This important new information could suggest that Facebook has consistently mislead the [Parliamentary Digital, Culture, Media and Sport select committee] about what it knew and when about Cambridge Analytica."


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Rob Price was a senior correspondent at Business Insider, based in San Francisco. He wrote investigations and long-form features about platforms, people, and power in Silicon Valley.His stories variously led to attorney general investigations, large-scale internal reviews at major tech companies, high-profile personnel departures, citation by state and federal lawmakers, and the closure of a well-funded startup. His 2022 story on the Bitfinex hack is being adapted into a feature film, and in 2024 he received an SPJ NorCal Excellence in Journalism award for his reporting on AI and relationships.Rob's scoops and exclusive stories were cited by The New York Times, Bloomberg, the BBC, Associated Press, Reuters, CNBC, Politico, The Guardian, Axios, and many other national and international publications. His writing has also been published in or syndicated by The Washington Post, The Independent, Vice, Slate, and elsewhere, and he appeared on CNN, the BBC, CBS, Reuters, ABC Australia, and other broadcast media to discuss technology, business, and culture.He worked for Business Insider from 2015 to 2025. Prior to joining the features team, Rob covered Facebook and Silicon Valley, and before that wrote about tech business, policy, and the gig economy in London. Between September and October 2019, he was acting executive editor for Business Insider's UK bureau. He also sat on the board of directors for the San Francisco Press Club, the leading non-profit media advocacy group in the Bay Area, and was a volunteer crew member at the Marine Mammal Center, the world's largest animal hospital for marine mammals. You can contact Rob Price via email at robaeprice@gmail.com, or +1 650-636-6268 (Signal / WhatsApp / Cell). Selected stories:— They spoke out against their employer. Then they were hit with trade secrets suits.— The rise of 'shadow stand-ins'— App, Lover, Muse: Inside a 47-year-old Minnesota man's three-year relationship with an AI chatbot— Deel Speed: The inside story of a $12 billion HR startup's breakneck growth— Private islands, flying cars, and psychedelic parties: Inside the wild post-Google lives of Larry Page and Sergey Brin— 'I want your Instagram account': First came the threatening texts, followed by the SWAT teams. Then someone wound up dead.— Inside Iconiq: How Mark Zuckerberg's banker built a secret Silicon Valley empire and made billions— Gaia was a wildly popular yoga brand. Now it's a publicly traded Netflix rival pushing conspiracy theories while employees fear the CEO is invading their dreams— A drunken late-night assault allegation has roiled the secretive world of Mark Zuckerberg's private family office. Personal aides are speaking out about claims that household staff endured sexual harassment and racism from their colleagues.