The Trade Desk's stock has plummeted roughly 70% over the past year, erasing about $69 billion in market value as the digital-advertising platform loses ground to larger rivals. Once positioned as a scrappy challenger to Google's dominance, the company now faces intensifying competition from Amazon and strained relationships with major ad agencies.

Founded in 2009 and taken public in 2016, The Trade Desk built its business by partnering with agencies while competitors tried to bypass them. CEO Jeff Green became known for criticizing Google's ad monopoly, and the company delivered consistent revenue growth often exceeding 25% annually during its early public years.

Now the landscape has shifted dramatically. Agency partnerships have deteriorated, top executives have departed, and Amazon has emerged as a formidable competitor. Google maintains its stronghold while the digital ad market consolidates among tech giants with superior scale and targeting capabilities.

The steep decline illustrates how rapidly fortunes change in digital advertising, where advertisers increasingly prioritize integrated platforms offering reach, precision targeting, and competitive pricing over specialized solutions.