Six firms became four — then the antitrust cops moved in
The 2017–2018 mega-mergers left four firms controlling most of the world’s proprietary seed. Then federal enforcers had to go after the tying and loyalty schemes that market power enabled.
This spoke grades the consolidation and the enforcement response separately: the mergers and the Justice Department’s action against Bayer are settled fact; the FTC’s theory of harm against Syngenta and Corteva is an allegation still being litigated, and we keep that line.
What this page is about
A wave of mergers around 2017–2018 condensed the seed-and-agrochemical industry from six dominant firms to four: Bayer (which bought Monsanto for about $63 billion), Corteva (from the Dow-DuPont merger), Syngenta (bought by China’s state-owned ChemChina), and BASF. Together they control the majority of the global proprietary seed and trait market.
Then the referees moved. The DOJ made Bayer drop seed-tying and loyalty terms in its “Premier Performance Program”; the FTC and state AGs sued Syngenta and Corteva over loyalty programs alleged to block cheaper generics; and Corteva settled a farmer pricing suit for $85 million.
The same investigation, restaged one beat at a time. Step through it here, or present it fullscreen.
Six firms became four — then the antitrust cops moved in.
The 2017–2018 mega-mergers left four firms controlling most of the world's proprietary seed. Then federal enforcers had to go after the tying and loyalty schemes.
The record, in order
Every dated event on this page, assembled chronologically. The page may cover events in a different order for the narrative; this is the straight timeline.
The consolidation, and the enforcement that followed
Six firms became four
FACTAround 2017-2018, a cluster of mega-mergers reshaped the industry: Bayer acquired Monsanto for roughly $63 billion (and retired the Monsanto name); Dow and DuPont merged and spun off their agriculture business as Corteva; the Chinese state-owned ChemChina acquired Syngenta; and BASF picked up divested seed and trait assets. The result is a four-firm oligopoly — Bayer, Corteva, Syngenta, BASF — that controls the majority of the global proprietary seed and trait market. We report the share as a majority rather than a single blanket percentage, which the data do not cleanly support.
DOJ made Bayer drop its seed-tying and loyalty scheme
FACTThe Justice Department's Antitrust Division secured commitments from Bayer to end seed-tying and loyalty-program provisions in its 'Premier Performance Program.' Under the program, independent seed dealers who wanted to sell Bayer's in-demand proprietary seed had to hit sales targets across both corn and soybeans; a dealer who carried a local, independent variety for one of those crops could lose Bayer's discounts, squeezing independents. The DOJ said the changes 'benefit American consumers, farmers, and independent seed companies,' and that 'enforcement in agriculture is a top priority.' This is a documented government action, not an allegation.
FTC sued Syngenta and Corteva over 'loyalty programs' — and Corteva settled a pricing suit for $85M
FACTThe Federal Trade Commission, joined by a group of state attorneys general, sued Syngenta and Corteva (FTC matter 191-0031), alleging their 'loyalty programs' paid distributors conditional rebates on the condition that they keep cheaper generic pesticides off the market — foreclosing competition and raising prices for farmers. That foreclosure theory is an allegation being litigated, and we grade it as such. Separately and factually, in June 2026 Corteva agreed to an $85 million settlement with farmers over pesticide pricing. The suit's existence and the settlement are fact; the ultimate finding of anticompetitive harm in the FTC case is not yet decided.
The point of owning the seed is owning the customer
Consolidation is not just a number on a market-share chart. Once four firms own the seed traits farmers need, they can use tying and loyalty contracts to make sure those farmers buy the matching chemicals too, and to keep cheaper independents and generics out of the dealer’s barn. That is the mechanism the Agrochemical Cartel hub follows — own the seed, bundle the chemical, and lock in the customer — and it is why the antitrust enforcers had to intervene at all. That the government moved against these programs is the clearest sign the market power is real.
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