A sculpture on a terrace outside the offices of LinkedIn...

A sculpture on a terrace outside the offices of LinkedIn is shown on Sept. 22, 2016, in San Francisco. Credit: AP/Eric Risberg

LONDON — European Union regulators slapped LinkedIn on Thursday with a 310 million euro ($335 million) fine for violations of the bloc's stringent data privacy rules.

Ireland's Data Protection Commission reprimanded the Microsoft-owned professional social networking site over concerns about the “lawfulness, fairness and transparency” of its personal data processing for advertising purposes.

The Dublin-based watchdog is LinkedIn's lead privacy regulator in the 27-nation EU because that's where the company's European headquarters is based.

The watchdog said it carried out an investigation that found LinkedIn did not have a lawful basis to gather data so it could target users with online ads, which is a breach of the privacy rules known as General Data Protection Regulation, or GDPR. It ordered LinkedIn to comply with the rules.

Processing personal data “without an appropriate legal basis is a clear and serious violation” of the right to data protection in the EU, Deputy Commissioner Graham Doyle said in a statement.

LinkedIn said it that while it believes it has been “in compliance” with the rules, it's working to ensure its “ad practices” meet the requirements.

Suffolk County Sheriff Errol Toulon Jr. spoke with NewsdayTV's Ken Buffa about what life is like for the Gilgo Beach serial killer Rex Heuermann in jail. Credit: Anthony Florio; File Footage; Photo Credit: Newsday / James Carbone, John Paraskevas; AP / David Bookstaver, Clark County Sheriff's Office, Richard Drew, Mitchell Tapper, Don Ryan; Peconic River Sportsman’s Club / Kerry Goldberg

'He will be ... coming out of prison in a body bag' Suffolk County Sheriff Errol Toulon Jr. spoke with NewsdayTV's Ken Buffa about what life is like for the Gilgo Beach serial killer Rex Heuermann in jail.

Suffolk County Sheriff Errol Toulon Jr. spoke with NewsdayTV's Ken Buffa about what life is like for the Gilgo Beach serial killer Rex Heuermann in jail. Credit: Anthony Florio; File Footage; Photo Credit: Newsday / James Carbone, John Paraskevas; AP / David Bookstaver, Clark County Sheriff's Office, Richard Drew, Mitchell Tapper, Don Ryan; Peconic River Sportsman’s Club / Kerry Goldberg

'He will be ... coming out of prison in a body bag' Suffolk County Sheriff Errol Toulon Jr. spoke with NewsdayTV's Ken Buffa about what life is like for the Gilgo Beach serial killer Rex Heuermann in jail.

SUBSCRIBE

Unlimited Digital AccessOnly 25¢for 6 months

ACT NOWSALE ENDS SOON | CANCEL ANYTIME