Twitter co-founder selling 30% of his shares

Twitter co-founder Ev Williams plans to sell as much as 30 percent of his stake in the company during the next year.

"It actually pains me to be selling at this point, but this sale is all about personal context, not company context," Williams wrote in a blog post.

In the post addressed to shareholders and employees, Williams said Twitter shares would continue to make up the vast sum of his assets for the foreseeable future.

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