An interview with DOJ antitrust chief Jonathan Kanter, his first since taking office in November, on his mission, slamming the brakes on mergers, and more
Context & Ripple Effects
This interview is the first time Jonathan Kanter has spoken publicly about his agenda since Biden nominated him as a self-described long-time foe of Google and he took office in November. The profiles that preceded it framed him as a star corporate lawyer who litigated anti-Google cases while representing Microsoft; here he converts that biography into policy, pledging to 'slam the brakes' on mergers.
Read against later coverage — his Q&A on the Google search monopolization and ad tech cases and the 2024 profile of his biggest swing against corporate concentration — this conversation reads as the opening statement of the enforcement era those stories document.
First-order effects
- Companies contemplating mergers now face a DOJ chief who has publicly committed to slowing deal approvals, raising the risk premium on transactions awaiting review.
- Kanter's stated mission gives Antitrust Division staff explicit top-cover to challenge deals that prior administrations would have cleared.
Second-order effects
- Deal lawyers and investment banks must reprice merger risk for clients, shifting advisory work toward antitrust defense rather than deal execution.
- Rivals of dominant firms gain a credible path to complain about consolidation, knowing the agency's leadership is receptive by its own account.
Third-order effects
- If the posture holds, US merger review moves from a permissive clearance regime toward litigation-first enforcement — the trajectory the later Google monopolization and ad tech cases trace out.
- A sustained crackdown would push large companies to grow organically or via smaller tuck-ins rather than transformative acquisitions, reshaping exit expectations across venture-backed markets.
The trend: US antitrust enforcement under Biden appointees is shifting from negotiated clearances to confrontational merger challenges, with Kanter's division as the spearhead.