DOJ Investigates Andreessen Horowitz for Potential Antitrust Violations Over Competing AI Board Seats

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The US Justice Department is investigating Andreessen Horowitz over concerns that its partners may be improperly sitting on the boards of competing AI companies. Ben Horowitz sits on Databricks' board while Martin Casado serves on Fivetran's board—both companies provide data infrastructure tools. The nearly year-old probe centers on potential violations of Section 8 of the Clayton Act, a 1914 law against interlocking directorates.

DOJ Probe Targets Andreessen Horowitz Over Board Directors of Competing AI Companies

The US Justice Department has launched an investigation into Andreessen Horowitz, examining whether the venture capital firm's partners are improperly serving on the boards of competing artificial intelligence companies

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. The nearly year-old investigation, first reported by Bloomberg on Monday, focuses on potential antitrust violations involving board seats at Databricks and Fivetran, two portfolio companies that both provide software helping businesses collect, organize, and analyze large volumes of data

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Source: Benzinga

Source: Benzinga

Ben Horowitz, co-founder of Andreessen Horowitz, sits on the board of Databricks, while partner Martin Casado serves on Fivetran's board

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. Casado also previously held a board seat at dbt Labs, which Fivetran acquired in June after a months-long DOJ review that ultimately cleared the deal unconditionally

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. The investigation was opened around the same time as that merger review and has continued after the acquisition closed

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Section 8 of the Clayton Act and Interlocking Directorate Laws

The DOJ probe centers on Section 8 of the Clayton Act, a 1914 statute that prohibits interlocking directorates

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. The provision states that no person shall simultaneously serve as a director or officer in two corporations that compete, where an agreement between them would breach antitrust law

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. The law aims to prevent anticompetitive coordination and information-sharing between rival companies

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What distinguishes this case from previous enforcement actions is that more than one individual director is involved, placing the venture capital firm itself at the center of the investigation rather than a single person

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. While the statute covers entities as well as people, and a handful of courts have interpreted it that way, this point is not fully settled—which could give the firm room to contest any allegations the government brings

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Biden-Era Enforcement Continues Despite Political Ties

The investigation represents a continuation of Biden-era enforcement priorities under then-Assistant Attorney General Jonathan Kanter, who rarely invoked the 1914 provision before his tenure

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. Under Kanter's leadership, the DOJ pressed directors to leave numerous boards to resolve conflicts of interest. Ari Emanuel, then CEO of Endeavor Group Holdings, left the board of Live Nation Entertainment in 2021, and directors at more than ten other companies gave up seats across 2022 and 2023

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The investigation is particularly noteworthy given Andreessen Horowitz's close alignment with the second Trump administration and its significant influence on AI policy

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. Marc Andreessen and Ben Horowitz each donated millions of dollars in 2024 to groups supporting Trump's candidacy. ProPublica reporting cited by Forbes put the firm and its co-founders at $115.5 million in donations ahead of the November midterms, making them the largest donor

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. Horowitz also gave $2.5 million to a super PAC supporting Democratic candidate Kamala Harris later in 2024

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Source: The Next Web

Source: The Next Web

Andreessen has taken on government advisory roles since Trump's second inauguration. War Secretary Pete Hegseth appointed him to the Pentagon's Defense Policy Board in June, and the Federal Reserve enlisted him to advise on AI in July

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. The firm has been a key voice on AI policy, successfully pushing the administration to remove many safety guardrails on the use of the technology

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Stakes for the AI Sector and Venture Capital Firm

As of January 2026, Andreessen Horowitz had $90 billion in assets under management, making it one of the richest venture capital firms in the world

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. The firm recently raised a $15 billion fund, its largest haul ever, to invest across the startup ecosystem—raising more than 18% of all venture capital dollars allocated to the US in 2025

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Andreessen Horowitz has poured billions into AI upstarts, backing companies like coding startup Cursor, which was recently acquired by SpaceX, and voice AI company ElevenLabs

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. The firm is also a major investor in SpaceX, which went public in June, and has backed OpenAI, which is looking to go public in the near future

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Databricks represents a particularly valuable asset within the portfolio. Horowitz is sitting on billions of dollars in potential returns due to his continued lead investments in the company, dating back to a $14 million fundraising in 2013

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. Databricks last week announced $5 billion in funding at a $190 billion valuation, positioning it as one of the most valuable privately held technology companies in the world and a strong IPO contender

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Sources familiar with the matter told Bloomberg that the DOJ has not made any final determinations, and the investigation could end with no action

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. Typically, resolving such investigations requires directors to step down from one of the competing boards

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. Spokespeople for Databricks and the Justice Department declined to comment, while spokespeople for Andreessen Horowitz and Fivetran did not respond to requests for comment

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The outcome of this probe could set important precedent for how interlocking directorate laws apply to venture capital firms with multiple partners serving on boards of portfolio companies in the rapidly consolidating AI sector. Watch for potential board resignations or legal challenges that could reshape governance practices across Silicon Valley's most influential investors.

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