With more than half of the U.S. public on Facebook and more than 200 million tweets sent each day (about 30 percent from the U.S.), American life is continuing to enmesh itself with social networks. But for the CEOs of the top 500 U.S. companies, social networking is a small — if existent — piece of successful living.

In a report released Thursday by Domo and CEO.com, the online presence of Fortune 500 companies’ top executives was compared to that of the general public, revealing that less than 30 percent have at least one profile on social networks. The vast majority have none.

Some of these accounts sit inactive — five of the 19 CEOs on Twitter have never tweeted — while others seem underutilized — 25 of the 38 CEOs on Facebook have less than 100 friends. The only social network that these executives outdo the U.S. public on is LinkedIn, the “world’s largest professional network.”

Perhaps the loneliest social networks for these top executives are Google+ and Pinterest. The former has only four of the CEOs — including Google’s own Larry Page — and the latter has none, despite Pinterest’s growing base of approximately 12 million American users.

Although the percentage of the top executives on social networks sits at less than 30 percent, Wikipedia has profiles for more than 36 percent of them. Only one of the CEOs has and maintains his own blog: John Mackey of Whole Foods.