PubNub, Inc. announced it will issue 24,764,735 series D preferred stock at a price of $1.0095 per share for gross proceeds of $24,999,999.9825 on January 18, 2019. The shares are convertible, non-cumulative, and non-redeemable. The shares will be convertible into common shares at a fixed conversion price of $1.0095 per share.