The U.S. Justice Department announced on March 4 2026 that it is investigating whether the largest fertilizer producers, including Mosaic, engaged in price‑fixing or collusive conduct that could harm competition and consumers. The probe focuses on potential agreements or practices that could have artificially inflated prices for phosphate, potash, and other fertilizer products, which are critical inputs for global agriculture.
Mosaic, one of the top three U.S. producers, is a named party in the investigation. The company will be required to provide documents, testimony, and other evidence to the DOJ. If evidence of wrongdoing is found, Mosaic could face significant civil penalties, mandatory divestitures, or other remedial actions that would impact its financial results and market position.
Mosaic’s recent financial performance provides context for the probe. In the fourth quarter of 2025, the company reported a net loss of $519 million and diluted EPS of $(1.64). Adjusted EBITDA was $505 million, compared with a full‑year 2025 net income of $541 million and adjusted EBITDA of $2.4 billion. The Q4 2025 EPS of $0.22 missed analyst expectations of $0.44 by 50%, while revenue of $3 billion exceeded forecasts by 8.7%. The company cited weak U.S. demand and high sulfur prices as headwinds that compressed margins.
Management highlighted progress in 2025, noting asset fortification, cost and efficiency improvements, and divestitures of non‑core assets. CEO Bruce Bodine said the company had made significant progress, but deferred demand and higher raw‑material costs negatively impacted year‑end results, with expectations of demand recovery as the planting season approaches. Mosaic also expects a roughly $250 million EBITDA headwind in Q1 2026 due to higher sulfur costs, while anticipating at least 7 million tons of phosphate production in 2026.
The announcement triggered a negative market reaction, with investors reassessing the companies’ competitive dynamics and regulatory risk profile. The probe raised concerns that civil or criminal antitrust violations could impose significant financial consequences, especially given the high concentration of the U.S. fertilizer market.
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