Mosaic Co Balances Record Volumes With Cost Shocks

Mosaic Co ((MOS)) has held its Q1 earnings call. Read on for the main highlights of the call.

Mosaic Co’s latest earnings call reflected a cautious but steady tone as management balanced record phosphate sales and strong potash fundamentals against a sharp spike in sulfur and ammonia costs. Executives stressed that current curtailments, charges and lower visibility are a response to extraordinary raw‑material volatility, not a loss of confidence in the underlying business.

Record Phosphate Volumes Despite Turbulent Markets

Mosaic sold 1.9 million tons of phosphate in the first quarter, its highest quarterly volume in five years and above its prior 1.8–2.0 million ton capability target. Management highlighted that this performance came even as the company navigated a volatile input environment, underscoring resilient customer demand for phosphate products.

U.S. Acid Plants Running Strong After New Wales Turnaround

Bartow, Riverview and Faustina all ran at or above roughly 80% phosphoric acid operating rates, in line with internal goals for the quarter. The New Wales facility completed a large planned turnaround, which the company expects will enhance future production capability and reliability in its U.S. phosphate system.

Potash Fundamentals Remain A Bright Spot

Potash markets stayed balanced with robust demand across major geographies, and Mosaic noted Canpotex is committed through June and tracking toward a record 2026. Belle Plaine and Esterhazy showed improved production and mix, while the ongoing Hydroflow ramp is expected to lower unit costs over time.

Q1 Sulfur Costs Supported Healthy Stripping Margins

Average realized sulfur costs were $379 per ton in the first quarter, giving Mosaic stripping margins of about $400 per ton on its sales book. Management emphasized that these margins provided a solid profitability base heading into a much more challenging sulfur price environment in subsequent quarters.

Portfolio Pruning And Tight Capital Discipline

The company cut its 2026 capital spending plan by $250 million to $1.25 billion and continued to streamline its asset base. Mosaic sold its Carlsbad potash mine and three additional mines, idled underperforming operations and implemented workforce reductions expected to deliver $50 million in annualized expense savings, with around $15 million anticipated in 2026.

Working Capital And Inventory Management In Focus

Mosaic moved inventory built up at the end of 2025 into a sales position, helping reduce phosphate finished goods by roughly $120 million in the first quarter. Despite this progress, overall working capital was modestly higher as Brazilian inventories increased, but management reiterated its goal of releasing $300–$500 million of working capital over 2026.

Mosaic Biosciences Scales Up Rapidly

The Mosaic Biosciences unit continued its rapid expansion with two product launches in the first quarter and a pipeline of 8–10 new products planned for 2026. The company expects this business to double revenue again in 2026, positioning biosciences as a meaningful growth and diversification lever within the broader portfolio.

Structural Raw-Material Sourcing Advantages

Management underlined that about 80% of U.S. ammonia requirements are covered by internal production and below‑market domestic agreements. Roughly 80% of sulfur needs are sourced as molten sulfur from U.S. Gulf refineries, which Mosaic believes gives it structural supply and contract advantages versus peers more exposed to seaborne markets.

Geopolitics Drive Severe Raw-Material Shocks

Conflicts in regions such as the Persian Gulf and Ukraine have disrupted flows for key fertilizer inputs, including phosphate, urea, ammonia and sulfur. Mosaic pointed out that marginal sulfur prices near $1,200 per ton and marginal ammonia around $800 per ton are forcing a reevaluation of operations and creating extreme cost volatility across the industry.

Planned Curtailments Add Volume Uncertainty

To limit sulfur consumption, Mosaic is partially curtailing production in Louisiana and at Bartow, as well as scaling back some fertilizer output in Brazil. The Louisiana curtailment affects about half of its 1.4 million ton annual finished‑product capability, and Bartow cuts impact roughly half of its 2.0 million ton annualized capacity, creating near‑term shipment uncertainty.

Large Charges And Brazilian SSP Idling

Idling the Araxá and Patrocínio facilities and related portfolio actions generated $442 million in charges, about $328 million of which were non‑cash. Management said the shutdown of SSP production highlights structural margin challenges for this product in Brazil and should reduce future maintenance capital needs while tightening the asset base.

Rising Input Costs And Higher Per-Ton Conversion

Looking ahead, Mosaic expects realized sulfur costs around $540 per ton and ammonia at roughly $610 per ton in the second quarter, up sharply from the first quarter. The company had targeted conversion costs near $90 per ton before curtailments, but now anticipates $105–$110 per ton if reduced production rates persist into the back half of the year.

Demand Softness Weighs On The Americas

U.S. spring demand was described as subdued, as farmer economics constrained fertilizer applications despite reasonable agronomic needs. In Brazil, credit constraints and declining fertilizer shipments are pressuring volumes, and Mosaic expects fertilizer use there to contract in 2026, leading management to withdraw second‑quarter EBITDA guidance for its Fertilizantes segment.

Working Capital Exposed To Input Price Swings

The company cautioned that its targeted $300–$500 million working‑capital release is sensitive to swings in sulfur prices and other inputs. Management illustrated that a sulfur rise from $500 to $900 per ton could create a roughly $300 million headwind due to Mosaic’s exposure to around 0.8 million tons of sulfur within inventory and finished goods.

Regional Inventory Shifts Temper Progress

Although phosphate finished goods declined by about $120 million in the first quarter, higher finished goods at Mosaic Fertilizantes in Brazil offset much of that release. As a result, total working capital ended the quarter slightly higher, and management acknowledged that regional inventory positioning remains a near‑term drag on cash generation.

Limited Visibility Forces Guidance Pullbacks

Given the uncertainty around sulfur availability, rising input costs and volatile geopolitics, Mosaic withdrew certain segment‑level forward metrics, including Fertilizantes second‑quarter EBITDA. The company said visibility into second‑ and third‑quarter production and shipments will remain constrained until raw‑material supply conditions stabilize, reinforcing a cautious stance for the near term.

Cautious Guidance Amid Volatility And Restructuring

Management maintained a guarded outlook, reaffirming expectations for a $300–$500 million working‑capital release in 2026 despite recent headwinds and confirming a reduced 2026 CapEx budget of $1.25 billion. Workforce reductions are expected to yield $50 million in annualized savings, while idling and asset actions should add $20–$30 million in annual maintenance CapEx savings, even as higher sulfur and ammonia costs push stripping and conversion metrics above prior targets.

Mosaic’s earnings call painted a company tightening its belt and optimizing its portfolio while waiting out an extraordinary raw‑material shock. Investors heard a mix of record phosphate volumes, strong potash demand and biosciences growth alongside curtailments, charges and withdrawn guidance, leaving the stock story hinged on how quickly sulfur and ammonia markets normalize and when management can safely ramp production back up.