Andreessen Horowitz is reportedly the focus of a U.S. Department of Justice antitrust investigation into whether board seats held by two of the venture firm’s partners at Databricks and Fivetran create an illegal interlocking directorate as the companies’ businesses increasingly overlap.
Bloomberg reported the investigation Aug. 17, citing people familiar with the matter, and said the inquiry began nearly a year ago. Reuters subsequently carried Bloomberg’s account. The Justice Department declined to comment, and Andreessen Horowitz, commonly known as a16z, did not immediately respond to the outlets.
No public complaint, finding of wrongdoing or enforcement action has been announced. The most accurate description is therefore a reported and unresolved investigation, one that could still end without action.
The board seats at the center of the report
A16z’s own leadership pages confirm the two directorships. Co-founder and general partner Ben Horowitz serves on the board of Databricks, while general partner Martin Casado serves on the board of Fivetran. Both companies operate in the expanding market for enterprise data infrastructure used to prepare, move and manage information for analytics and artificial-intelligence systems.
Casado also previously served on the board of dbt Labs. Fivetran and dbt Labs completed an all-stock merger in June, combining Fivetran’s automated data-movement tools with dbt Labs’ data-transformation workflow. Bloomberg reported that the DOJ examined the merger and allowed it to close without conditions while continuing the separate inquiry involving a16z.
That distinction matters. Clearance of a transaction does not necessarily resolve a separate question about who sits on the boards of companies that may compete.
Why Section 8 can reach beyond one individual
The reported inquiry centers on Section 8 of the Clayton Act, a preventive antitrust law that generally bars the same person from serving as an officer or director of two competing corporations above statutory size thresholds, subject to limited safe harbors. The law is intended to reduce opportunities for coordination before evidence of an agreement or other anticompetitive conduct appears.
The Federal Trade Commission’s 2026 threshold update set the general capital, surplus and undivided-profits threshold at $54.4 million and a relevant competitive-sales threshold at $5.44 million. Application of the law still depends on the companies’ size, the amount and percentage of competitive sales, corporate structure and how the market is defined.
The unusual wrinkle is that Horowitz and Casado are different people. The DOJ and FTC have nevertheless argued that a company or investment firm can create a prohibited interlock by designating different representatives to the boards of competing corporations. In a 2025 joint statement of interest, the agencies said Section 8 may apply when one entity appoints separate agents or deputies to rival boards.
Companies that were not competitors when the appointments were made may receive a one-year grace period if later market changes create an interlock. That provision could become important in technology markets, where adjacent products can become direct substitutes quickly.
Databricks and Fivetran are partners — and increasingly overlap
Whether Databricks and Fivetran legally compete is likely to be the central factual question.
Databricks now markets Lakeflow as a unified system for data ingestion, transformation and orchestration. Fivetran’s core business is automated data integration and movement, with the dbt Labs combination extending its position deeper into transformation. Those descriptions place parts of the companies’ product portfolios in increasingly similar territory.
At the same time, the companies also work together. Enterprise-software vendors routinely partner in one layer of a technology stack while competing in another. That makes market definition more complicated than comparing category labels on an investor’s portfolio page.
The broader industry trend is clear: companies that once occupied distinct parts of the data pipeline are adding adjacent capabilities to become more complete platforms for AI-era infrastructure. Product convergence can turn yesterday’s complementary investments into today’s governance conflict.
A governance warning for venture capital
Board representation is a core part of the venture-capital model. It gives investors oversight, information and influence as portfolio companies scale. The reported a16z investigation raises the possibility that firms will need to review those seats continuously rather than only when an investment is made.
The Justice Department has already revived Section 8 as an active enforcement tool. In 2022, seven directors resigned from the boards of five companies after DOJ scrutiny. In another matter, Tencent removed two directors from Epic Games and relinquished board-appointment and observer rights.
The usual practical remedy is a resignation or surrender of governance rights, not necessarily a monetary penalty. But the consequences for investors can still be significant. Venture firms may need stronger portfolio-overlap reviews, clearer information barriers, closer scrutiny of observer rights and planned exits from board seats when companies move into the same market.
What happens next will depend on whether the DOJ publicly confirms the inquiry, how it defines competition between Databricks and Fivetran, whether a16z responds and whether either board arrangement changes. Until then, the report is significant because of the governance question it raises—not because regulators have concluded that Andreessen Horowitz broke the law.