The Justice Department has opened an investigation into Andreessen Horowitz over the venture capital firm's partners holding board positions at rival companies, Bloomberg reported. The nearly year-long inquiry centers on the firm's board representation at Databricks, valued at $190 billion, and Fivetran, which merged with dbt Labs in June. The probe has left several venture capitalists surprised, given that regulators have rarely applied this particular legal standard to the venture capital industry.
Ben Horowitz, co-founder of the firm, holds a board seat at Databricks, while partner Martin Casado sits on Fivetran's board. The two companies weren't competitors when a16z initially invested in the startups, according to a Databricks investor who spoke anonymously. Databricks built its reputation on cloud storage offerings but has moved into AI data pipelines and application connectors through its Lakeflow product—the core business territory where Fivetran operates. The investigation invokes Section 8 of the Clayton Act, a 112-year-old statute that prohibits an individual or entity from serving on the boards of competing companies.
The legal action targets a conflict that has grown more common as venture portfolios expand, one investor noted. Because Andreessen Horowitz has invested in hundreds of startups, it's nearly unavoidable that some will shift direction or grow into overlapping markets. While financing direct competitors has gained acceptance recently—many VCs funded both Anthropic and OpenAI—serving on competing boards creates far greater conflicts, since directors access considerably more sensitive strategic details than non-board investors ever receive. Such conflicts can be resolved by having a partner resign from one board, though a16z could establish a so-called Chinese wall between Horowitz and Casado to block the two partners from exchanging confidential details about the companies with each other.
The industry is monitoring the DOJ's inquiry carefully because regulators have seldom targeted venture capital firms with this rule. If a16z is compelled to give up a seat, founders may assign less importance to board commitments from top-tier VCs, since those investors might be forced to step down if portfolio overlap generates future conflicts. Andreessen Horowitz, Databricks, and the DOJ all declined to comment or did not immediately respond to requests. For an industry built on backing dozens of bets simultaneously, this enforcement action could reshape how elite firms structure their governance involvement and whether founders continue to prize board representation from funds with sprawling portfolios.