The "gated-access approach" (where contact with any professional requires either an existing relationship or an introduction through a contact of theirs) is intended to build trust among the service's members.
Linked In participated in the EU's International Safe Harbor Privacy Principles.
Shares of Linked In rose as much as 171% on their first day of trade on the New York Stock Exchange and closed at .25, more than 109% above IPO price.
Shortly after the IPO, the site's underlying infrastructure was revised to allow accelerated revision-release cycles.
As a result of these numbers, Linked In's stock increased to roughly 2 a share.
On June 13, 2016, Microsoft announced that it would acquire Linked In for 6 a share, a total value of .2 billion and the largest acquisition made by Microsoft to date.
Linked In filed for an initial public offering in January 2011.
The company traded its first shares on May 19, 2011, under the NYSE symbol "LNKD", at per share.
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To handle the large volume of emails sent to its users every day with notifications for messages, profile views, important happenings in their network, and other things, Linked In uses the Momentum email platform from Message Systems.
In 2014, Dell Secure Works Counter Threat Unit (CTU) discovered that Threat Group-2889, an Iran-based group, created 25 fake Linked In accounts.
it is mainly used for professional networking, including employers posting jobs and job seekers posting their CVs.
As of 2015, most of the company's revenue came from selling access to information about its members to recruiters and sales professionals.