DOJ dusts off 1914 antitrust law to examine Andreessen Horowitz's overlapping board seats

Section 8 of the Clayton Act, a 1914 antitrust statute written for steel-era corporate boards, is being aimed at the venture capital industry. The Department of Justice has reportedly been investigating Andreessen Horowitz for close to a year because two of its partners hold board seats at companies that have since grown into competitors: Ben Horowitz at Databricks, a data and AI infrastructure company, and Martin Casado at Fivetran, a data-movement and integration vendor, according to TechCrunch's 08/18 report.

The two companies did not directly compete when the firm first took those seats, but their products now overlap in the data-pipeline layer of enterprise AI stacks, the TechCrunch report said, in a companion Equity podcast episode that explored the open governance question.

Section 8 of the Clayton Act prohibits interlocking directorates, the practice of one person sitting on the boards of competing corporations. The DOJ is testing whether the doctrine reaches a venture fund whose portfolio companies grew into competitors after the fact, not by coordinated strategy. A 2023 white paper from WilmerHale describes how the doctrine has been "driven past its limits" as corporate structures have grown more complex.

For most of its history, Section 8 has been settled doctrine. If two competitors shared a director, that director had to resign from one board or the companies had to stop competing. The reason a venture board seat may not fit that mold is timing: venture funds typically take board seats at the time of investment, when the portfolio company is small and the competitive set is not yet defined. The conflict, when it appears, is the result of portfolio drift.

The probe's outcome hinges on that distinction, and the venture industry has not yet produced an articulated answer. VCs have traditionally managed overlapping board seats through internal governance, including recusal, information barriers, and not sharing competitive information across partners. According to the TechCrunch report, current and former VCs described the probe as "baffling," and some argued that board seats are advisory rather than operational. None of that rebuts the statute. Section 8 cares about the structural overlap, not what a director does with the information.

Every large venture firm holds board seats in companies whose category boundaries keep moving, and a successful Section 8 case would put the entire industry on notice. The question the probe forces is whether routine venture governance, including board seats, observer rights, and partner-level information flows, now requires the same compliance posture as a corporate merger review.

Federal enforcement of Section 8 has been rare for most of the last century, and the legal theory has not been tested against a venture fund. A DOJ complaint against a venture partnership would be the first of its kind, and the resulting precedent would tell every other large fund what "manage the conflict" actually means in writing.

The DOJ has not publicly confirmed the investigation. The next milestone is whether the office files a formal complaint, opens a settlement track, or closes the matter without action.