Most of the top brass at the nation's largest technology-focused companies are nowhere to be found on social media, at least in an official capacity.

That's the finding released this week by Augure, a provider of influence marketing software founded in Paris in 2002 and now claiming a client list of more than 1,500 companies and agencies.

The company said its research found that only 30% of the executive directors at NASDAQ 100 companies, including CEOs, are active on social media, and that Apple, for instance, has no official social network presence at all, although its CEO Tim Cook does have a Twitter account and, with 248,000 online media hits in the past year, he is the most influential leader across social and online media.

Among company directors, 23% use LinkedIn, Agure said its research found, making it the most widely used social network.

In second place is Twitter, with 11%, followed by Google+ and Facebook, with 8% and 5%, respectively.

“Only (Yahoo's) Marissa Mayer and (Tesla's) Elon Musk have an official Facebook page while Philippe Dauman of Viacom and Shantanu Narayen of Adobe have personal profiles on the platform,” Augure said in a news release this week.

“It is surprising to find just a 30% of the CEOs of NASDAQ involved in social media, making use of the new technology and working on its influence as leaders of these powerful and technological companies,” said Augure CEO Michael Jais.