WorkAugust 21, 2026via TechCrunch Startups
Why is the DOJ investigating Andreessen Horowitz’s board seats?
Why it matters
This signals a shift in how regulators view venture capital's structural role in AI/data infrastructure. If the DOJ pursues this under the Clayton Act, it could reshape how VCs navigate board seats and competitive portfolio overlap — a practice that's been routine for decades but is now under scrutiny as data and AI companies become strategically critical.
Key signals
- DOJ investigating for ~1 year
- a16z partners Ben Horowitz (Databricks board) and Martin Casado (Fivetran board)
- Investigation uses Clayton Act § 8 (rarely applied to VCs)
- Companies weren't direct competitors when a16z invested, now are
- Board conflicts commonplace in VC, but regulatory treatment may be shifting
- DOJ investigating a16z for ~1 year
- Ben Horowitz on Databricks board; Martin Casado on Fivetran board
- Databricks and Fivetran now compete
- Investigation invokes 112-year-old antitrust statute rarely used against VCs
- Companies were not direct competitors when a16z initially invested
The hook
The DOJ is dusting off a 112-year-old antitrust law to investigate a16z's board seats at competing data companies — the first real test of whether VC conflicts are now regulatory targets.
Andreessen Horowitz has two partners sitting on the boards of companies that now compete with each other: Ben Horowitz at Databricks and Martin Casado at Fivetran. Nothing too scandalous on the surface, except the Department of Justice has reportedly been investigating the arrangement for almost a y…