The Department of Justice is investigating Andreessen Horowitz's board seat arrangements under an obscure antitrust law that targets potential conflicts of interest across competing portfolio companies.
The DOJ has been looking into a situation where two a16z partners occupy board seats at companies that now directly compete. Ben Horowitz sits on Databricks' board while Martin Casado sits on Fivetran's board. Both companies operate in the data integration and analytics space, creating what regulators view as a potential conflict.
The investigation invokes Section 8 of the Clayton Act, a 112-year-old law that prohibits interlocking directorates. The statute bars individuals from serving on the boards of competing companies simultaneously when those firms have the size and market position to trigger antitrust concerns. The law has fallen out of favor in recent decades but remains on the books as a tool for challenging board overlap arrangements that might reduce competition.
Timing matters here. When Andreessen Horowitz first invested in these companies and placed partners on their boards, Databricks and Fivetran were not direct competitors in any meaningful sense. Market positioning shifted as both companies evolved. Databricks expanded beyond its original lakehouse focus into data integration work, while Fivetran strengthened its position in managed data pipelines. The convergence created an overlap that caught regulatory attention.
The investigation reveals a blind spot in how venture capital firms structure governance. A16z has historically taken board seats across its portfolio as a way to drive strategic value and maintain influence over capital deployment. This approach works well when portfolio companies operate in distinct markets. Problems emerge when thesis drift or market expansion push companies into direct competition.
The Clayton Act provision targets scenarios where board interlocks could suppress competition through information sharing or coordinated strategy. A regulator might worry that Horowitz and Casado could share sensitive competitive information between boards, that strategic decisions at one company could benefit the other, or that the firms might coordinate rather than compete on pricing and product development.
Venture firms have operated largely outside antitrust scrutiny for decades. The DOJ's move signals willingness to examine board seats and governance arrangements as potential competition issues. This puts pressure on other large VCs managing sprawling portfolios where portfolio company missions overlap.
The practical implications extend beyond a16z. Any venture firm with board representation across potentially competing portfolio companies now faces regulatory risk. The threshold question becomes whether two companies truly compete, and that determination grows murkier as companies pursue adjacent markets or expand their product roadmaps.
A16z and the companies involved have not disclosed settlement discussions or enforcement actions. The mere fact of investigation, however, suggests the DOJ believes the arrangement warrants scrutiny under a law most people forgot existed. The outcome will likely reshape how venture firms approach board governance and whether they continue the practice of placing partners on multiple portfolio company boards.