Malik, who was previously a venture partner at the firm, will remain on the Gigaom board and write occasional columns according to a blog post.
He also revealed that Gigaom had raised $8m in new funds from Shea Ventures, True Ventures, Alloy Ventures and Reed Elsevier Ventures.
Early stage investor True Ventures recently launched a $250m-targeting fundraise for its fourth vehicle since it was founded in 2006.
True Ventures IV hopes to outstrip the $205m third fund the firm closed in June 2012 according to a filing with the US Securities and Exchange Commission.
That filing shows True IV is yet to receive any commitments to date.
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