Fundamental (FUND) Raises $255M Series A with Large Tabular Model Nexus

Fundamental, an AI lab, went public from stealth on February 05, 2026, with a $255 million Series A investment and a $1.2 billion valuation. The round, led by Oak HC/FT, Valor Equity Partners, Battery Ventures, Salesforce Ventures, and Hetz Ventures, includes angel backing from Perplexity, Brex, and Datadog executives. The company unveiled its Large Tabular Model, Nexus, designed specifically for structured enterprise data, offering deterministic performance without the transformer architecture common in LLMs. It addresses the limitations of context windows in handling massive datasets, enabling a single model across diverse use cases with better performance than traditional data science approaches. The model is already in strategic use with Fortune 100 clients and is being integrated with AWS for deployment. The company has secured seven-figure contracts and is positioned to expand its footprint in big data analytics.