Viant Technology is exploding higher today following the company's announcement on September 16 regarding the launch of an underwritten public offering of 8.5 million Class A shares. While the broader software and technology sector has seen increased activity surrounding artificial intelligence infrastructure and martech innovation, the specific movement in DSP is driven by this primary company-specific filing. This offering, which involves shares being sold by a selling stockholder, serves as the clear catalyst for the stock's current momentum.