The U.S. Department of Justice announced on Monday, May 4, 2026, an intensified criminal antitrust investigation into the four largest beef processors operating in the United States, two of them Brazilian-owned. Acting Attorney General Todd Blanche said at a Washington press conference that DOJ lawyers have already reviewed more than three million documents and interviewed hundreds of ranchers since President Donald Trump ordered the probe in November 2025. The targets are JBS USA, Cargill, Tyson Foods and National Beef, which together control about 85 percent of U.S. cattle slaughter capacity.
Key Points
— U.S. DOJ, USDA Secretary Brooke Rollins, and White House trade adviser Peter Navarro announced an intensified probe into JBS USA, Cargill, Tyson Foods and National Beef on Monday, May 4, 2026.
— The big four control roughly 85 percent of U.S. beef processing, up from 25 percent in 1977, according to USDA data cited at the press conference.
— Two of the four are foreign-owned: JBS USA, controlled by JBS S.A., and National Beef, owned by MBRF Global Foods (MBRF3 on B3).
— The announcement lands three days before President Lula travels to Washington for a Thursday summit with Trump.
— Navarro singled out JBS in unusually pointed language about Brazilian political spending, framing the case as both economic and national security.
— Goldman Sachs flagged JBS BDR JBSS32 and MBRF3 likely to remain under pressure; Bradesco BBI said the probe should be short-term noise.
What the DOJ Did
Blanche convened the press conference at the Department of Justice with Rollins and Navarro, and confirmed that the antitrust division had moved from preliminary inquiry to active investigation. The probe is examining potential price-fixing, bid-rigging, market allocation and procurement fraud in cattle markets. Blanche urged ranchers and industry insiders to come forward through the DOJ whistleblower programme, which can pay informants between 15 and 30 percent of any criminal recovery exceeding one million U.S. dollars.
Rollins detailed the structural case. The big four operate through 70 subsidiary companies, she said, and concentration in beef processing has surged from 25 percent in 1977 to 85 percent by 2024. She tied the consolidation to a U.S. cattle herd of just 27.6 million beef cows as of January 2026, the lowest level since the 1950s.
JBS told Brazilian outlet Folha de S.Paulo it would not comment on the U.S. government decision, and MBRF gave the same response. Cargill and Tyson Foods did not respond to requests for comment by Monday evening.
Why It Matters
Navarro’s intervention was the politically pointed moment. Trump’s senior trade adviser told reporters that the Brazilians are far more of the problem and that JBS specifically hands out millions of dollars to the U.S. political system.
He cited the combination of tight cattle supply, processor dominance and foreign ownership as the engine of beef inflation. Rollins added that foreign control of two of the big four constitutes a national security concern.
Beef inflation has been a persistent theme in the Trump second term. Trump signed the executive order opening the probe in November 2025 after retail ground beef prices reached record highs. The probe covers cattle purchase agreements between feedlots and meatpackers, including the alternative marketing agreements that have replaced open auctions.
| Processor | Headquarters | U.S. share band | Brazilian exposure |
|---|---|---|---|
| JBS USA | Brazil (parent) | Largest in beef | JBS S.A., listed in São Paulo and on NYSE; B3 BDR JBSS32 |
| Cargill | United States (Minnesota) | Top three | None |
| Tyson Foods | United States (Arkansas) | Top three | None |
| National Beef | Brazil (parent MBRF) | Top four | MBRF Global Foods, B3 ticker MBRF3 |
How This Reframes the Lula-Trump Summit
The DOJ probe announcement on Monday lands forty-eight hours before President Lula boards a plane to Washington. Brazilian diplomats had been framing the trip as a tariff-and-rare-earths reset.
The Rio Times, the Latin American financial news outlet, reports that the agenda set last week emphasised tariff relief, cooperation on critical minerals, and Brazilian concerns about a possible U.S. terrorist designation of the PCC and Comando Vermelho criminal factions, as covered in our analysis of the Lula-Trump Washington summit.
Navarro’s framing on Monday changes the tone. Brazilian beef has joined Brazilian rare earths and Brazilian fintech as a category Washington wants to renegotiate.
For broader context on the European outlet for Brazilian beef, see our prior coverage of the EU-Mercosur trade deal day one.
What Happens Next
Blanche said the DOJ is moving as quickly as possible but did not commit to a charging timeline. Three milestones are on the calendar:
- Thursday, May 7: Lula-Trump meeting at the White House, where any tariff-and-investigation linkage will be tested.
- Mid-May: JBS S.A. quarterly results, where the company will face investor questions on the U.S. exposure of JBS USA.
- Late May: MBRF Global Foods first results as a merged entity, with National Beef accounting for a material share of consolidated revenue.
Frequently Asked Questions
What is the DOJ beef antitrust probe announced on May 4, 2026?
The probe is a U.S. Department of Justice antitrust division criminal investigation into whether the four largest U.S. beef processors engaged in price-fixing or other anticompetitive conduct. Acting Attorney General Todd Blanche confirmed on May 4, 2026, that the investigation has reviewed three million documents and heard hundreds of producers since November 2025. The companies under investigation are JBS USA, Cargill, Tyson Foods and National Beef.
Which Brazilian companies are involved in the U.S. meat antitrust investigation?
Two of the four target companies are Brazilian-owned. JBS USA is the U.S. subsidiary of São Paulo-listed JBS S.A., the world’s largest meat processor, while National Beef is owned by MBRF Global Foods, the conglomerate created in 2025 by the merger of Marfrig and BRF, which trades on B3 under ticker MBRF3. Together the two Brazilian-controlled processors account for roughly half of the 85 percent market share held by the big four.
How does the DOJ probe affect the Lula-Trump meeting on May 7?
The Lula-Trump meeting on Thursday, May 7, 2026, was originally planned to focus on tariff relief, rare earths cooperation, and the possible U.S. terrorist designation of Brazilian criminal factions. White House trade adviser Peter Navarro’s pointed comments about JBS political spending in the U.S. on May 4 inject a new agenda item. Brazilian Itamaraty officials told Brasil 247 they will work to keep the antitrust issue from derailing the broader reset.
How did JBS and MBRF stocks react to the DOJ news?
JBS BDR JBSS32 and MBRF3 came under pressure on Monday, May 4, 2026, ahead of fuller market reaction expected Tuesday. Goldman Sachs analysts flagged ongoing pressure given heightened risk perception, while Bradesco BBI said the probe should be short-term noise but reiterated a cautious view on the protein sector citing unfavourable cyclical trends. Both JBS and MBRF declined to comment on the DOJ announcement.
Updated: 2026-05-05T07:45:00Z by Rio Times Editorial Desk