The Trade Desk's stock sits 91% below its peak, a decade after the adtech firm went public as a $1.1 billion bet on the open web.

The number captures a stark reversal. A company once treated as a Wall Street darling now battles slowing revenue growth, backlash from partners, and mounting questions about its next decade.

The Trade Desk built its business on a simple proposition. It would provide a neutral platform for advertisers to buy media programmatically across the open web. No conflicts of interest, no ownership of inventory — just a pipe between buyers and sellers.

That positioning mattered. The company set itself up as a counterweight to the walled gardens of Google and Meta, which control both the buy and sell sides of their closed media ecosystems. Advertisers frustrated with opacity at the duopoly had an alternative.

The market bought the promise. The Trade Desk grew into one of the most valuable names in adtech, and its stock became a proxy for investor confidence in the open web itself.

That confidence has now eroded. Slowing revenue growth suggests the neutral-platform story no longer commands the premium it once did. Partner backlash adds a second front of pressure that the company did not face in its early years.

The squeeze comes from both directions. The walled gardens continue to absorb budgets within their closed ecosystems, while the open web that The Trade Desk champions faces its own structural challenges. A neutral intermediary depends on the health of the marketplace it serves.

Ten years in, the question facing The Trade Desk is whether its founding proposition — neutrality across an open web — still supports a standalone public company, or whether the battles of the next decade will demand a different answer.