During a very muted period for tech IPOs, Trade Desk has just filed its papers to go public. Anyone familiar with the company knows it's been anything but quiet for them of late.

Trade Desk is in the crowded advertising technology market and is one of the main tools being used by the Republican Party as it tries to maintain its majority in the U.S. Senate. Candidates in tight races are employing Trade Desk's targeting tools to reach the precise voters who can potentially put them over the top.