Mosaic Posts $72 Million Loss as Sulfur Costs Squeeze Fertilizer Output
Mosaic, one of the world's major phosphate and potash fertilizer suppliers, reported a $72 million net loss for the third quarter of 2026 as difficult fertilizer economics coincided with a constraint on affordable sulfur used in phosphate production. The November 3 announcement offers a view of how upstream chemical costs can affect farm inputs well before the planting season.
The company recorded $3.1 billion in quarterly revenue and a $97 million operating loss. Its adjusted earnings before interest, taxes, depreciation and amortisation, a non-GAAP measure, stood at $324 million. The fact that adjusted EBITDA remained positive while the company reported a net loss is not a contradiction: the metrics include different costs and adjustments, and neither should be substituted for the other.
Why sulfur matters to phosphate supply
Sulfur is a major input to producing sulfuric acid, which is used to process phosphate rock into phosphoric acid and then into widely used phosphate fertilizers. Gas, sulfur, rock, ammonia and electricity costs can therefore affect manufacturing economics through separate channels. Mosaic specifically said it had adjusted phosphate production to match affordable sulfur availability rather than operate irrespective of input costs.
For buyers, the immediate consequence is potential variation in output or delivery availability even when mineral reserves and mining capacity remain. A plant's theoretical annual capacity does not determine what it can economically produce while essential reagents are costly. Conversely, reduced near-term output is not proof of a permanent supply shortage: inventories, shipments from other regions and a change in sulfur prices can offset it.
Mosaic reported third-quarter sales volumes of 1.4 million tonnes of phosphate fertilizers, 2.1 million tonnes of potash and 1.9 million tonnes for its Brazilian Mosaic Fertilizantes business. These are separate reporting categories and should not be treated as one unified physical global fertilizer total without clarifying overlapping and intercompany flows.
A high sulfur contract illustrates the pressure point
The company said its fourth-quarter sulfur contract was settled at $615 per long ton. A long ton is 2,240 pounds, rather than the 2,000 pounds in a US short ton or the 1,000 kilograms in a metric tonne. As a unit-only calculation, $615 per long ton is approximately $605 per metric tonne; this conversion is not a delivered cost per tonne of fertilizer because actual chemical usage, processing yields and logistics differ.
Management said the contract settlement should contribute positively to fourth-quarter free cash flow. That statement is company guidance, not a guarantee that sulfur has become broadly affordable or that phosphate selling prices will fall. Regional sulfur markets, contract terms and maritime freight can diverge materially.
What the earnings change means for farmers
Phosphate is an important nutrient for root development and crop establishment, but the effect of fertilizer on yields depends on soil testing, timing and balanced nutrient management. High costs or uncertainty may lead some farmers to delay or reduce applications, particularly when commodity crop prices offer limited margins. Any effect on harvests occurs with a lag and cannot be inferred from a manufacturer's single quarter.
In agricultural input chains, several transmission stages matter: sulfur procurement affects plant utilisation, plant utilisation influences product availability, distributors set landed and retail offers after freight and currency effects, and farmers decide how much to buy against crop-price expectations and agronomic needs. A US producer earnings release only establishes evidence for some of those stages.
There can be offsetting factors. If phosphate demand softens because growers have previously built soil reserves or crop prices are low, the price impact of limited supply may be smaller. Potash markets may follow different supply and cost dynamics. The November results are not a basis for predicting a uniform increase in all nutrient prices.
Balance-sheet actions reveal the industry response
Mosaic said it had refinanced and extended all long-term debt maturities through 2028 and made sequential progress managing working capital and production. Those steps can improve financial flexibility without restoring plant-level margins. The company still faces an economic decision about when to run facilities, how much sulfur to purchase and whether fertilizer prices justify operation.
For distributors and banks financing seasonal input purchases, the key question is not only price per tonne today but the security of supply during procurement windows. Farms lock in planting decisions before crop outcomes are known. Disruption or unexpectedly expensive nutrients at the ordering stage can change the input plan months before any effect is visible in national yield data.
What would confirm a broader fertilizer shock
Track Gulf and international sulfur contract prices, phosphate plant operating rates, export offers, finished DAP and MAP price benchmarks, freight and distributor inventory levels. If sulfur remains costly and production stays curtailed while farm demand strengthens, the risk of tighter phosphate availability rises. If sulfur and logistics ease or rival producers fill orders, that thesis weakens.
Mosaic's results are therefore evidence of an important constraint at the junction of energy-linked chemicals and agriculture. They do not, alone, prove a global fertilizer shortage. The distinguishing insight is the risk that a commodity may be available in the ground but uneconomic to transform into a crop nutrient at a particular time.
Sources and methodology
AgriLinkage Production Desk, November 4, 2026. This analysis uses Mosaic's original third-quarter release dated November 3. The $605-per-metric-ton sulfur comparison is only a mass-unit conversion: $615 divided by 1.0160469 metric tonnes per long ton. All operational forecasts are labelled conditional. No independent visit or supplier interview was conducted.
Phosphate processing plant in Nichols, Florida. Photograph by Harvey Henkelmann / Wikimedia Commons, used with required photographer attribution. Historical industry illustration, not identified as a Mosaic facility.
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