þ	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

¨	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

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Our Phosphates business segment owns and operates mines and production facilities in Florida which produce concentrated phosphate crop nutrients and phosphate-based animal feed ingredients, and processing plants in Louisiana which produce concentrated phosphate crop nutrients. Included in the Phosphates segment is our 35% economic interest in a joint venture that owns the Miski Mayo Phosphate Mine in Peru and our 25% interest in the Ma'aden Wa'ad Al Shamal Phosphate Company (the "MWSPC") to develop, own and operate integrated phosphate production facilities in the Kingdom of Saudi Arabia. Once operational, we will market approximately 25% of the MWSPC production.

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Our Potash business segment owns and operates potash mines and production facilities in Canada and the U.S. which produce potash-based crop nutrients, animal feed ingredients and industrial products. Potash sales include domestic and international sales. We are a member of Canpotex, Limited ("Canpotex"), an export association of Canadian potash producers through which we sell our Canadian potash outside the U.S. and Canada.

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Our International Distribution business segment consists of sales offices, crop nutrient blending and bagging facilities, port terminals and warehouses in several key non-U.S. countries, including Brazil, Paraguay, India and China. Our International Distribution segment serves as a distribution outlet for our Phosphates and Potash segments, but also purchases and markets products from other suppliers.

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•	Payment of a cash penalty of approximately $8 million, in the aggregate.

•	Payment of up to $2.2 million to fund specific environmental projects unrelated to our facilities.

•	Modification of certain operating practices and undertaking certain capital improvement projects over a period of several years that are expected to result in capital expenditures likely to exceed $200 million in the aggregate.

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Provision of additional financial assurance for the estimated costs of closure and long term care ("Gypstack Closure Costs") of our phosphogypsum management systems ("Gypstacks"). For financial reporting purposes, we recognize our estimated asset retirement obligations ("ARO"), including Gypstack Closure Costs, at their present value. This present value determined for financial reporting purposes is reflected on our Consolidated Balance Sheets in accrued liabilities and other noncurrent liabilities. As of December 31, 2015, the undiscounted amount of our Gypstack Closure Costs ARO, determined using the assumptions used for financial reporting purposes, was approximately $1.7 billion and the present value of our Gypstack Closure Costs ARO reflected in our Consolidated Balance Sheet was approximately $535 million. After the 2015 Consent Decrees become effective, we will deposit cash, in the total amount of $630 million, into two trust funds which are expected to increase over time with reinvestment of earnings. The amount to be deposited corresponds to a material portion of our estimated Gypstack Closure Costs ARO. At December 31, 2015, amounts to be held in such trust funds (including reinvested earnings) are classified as restricted cash and are included in other assets on our Condensed Consolidated Balance Sheets. We will also issue a $50 million letter of credit in 2017 to further support our financial assurance obligations under the Florida 2015 Consent Decree. In addition, we have agreed to guarantee the difference between the amounts held in each trust fund (including earnings) and the estimated closure and long-term care costs. Our actual Gypstack Closure Costs are generally expected to be paid by us in the normal course of our Phosphates business over a period that may not end until three decades or more after a Gypstack has been closed.

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(a)

Certain intercompany sales within the Phosphates segment are recognized as revenue before the final price is determined. During the three months ended March 31, 2015 these transactions had the effect of increasing Phosphate segment revenues and gross margin by $87.7 million and $28.7 million, respectively. There were no intersegment sales of this type outstanding at March 31, 2016. Revenues and cost of goods sold on these Phosphates sales are eliminated in the "Corporate and Other" category similar to all other intercompany transactions.

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We entered into an accelerated share repurchase transaction in February 2016 (the "2016 ASR") to repurchase shares of our Common Stock for a payment of $75 million under the $1.5 billion repurchase program authorized by our Board of Directors in May 2015 (the "2015 Repurchase Program"). The 2016 ASR was settled on March 29, 2016 and we received a total of 2,766,588 shares of Common Stock. The final average price per share was $27.11.

•	We received insurance proceeds of $28 million related to the collapse of a warehouse roof at our Carlsbad, New Mexico location in 2014, which are included in other operating income.

•	Our Board of Directors approved an increase in our annual dividend to $1.10 from $1.00 per share, which was effective in May 2015.

•	We repurchased 2,560,277 shares of Common Stock in the open market for approximately $123.3 million under our $1 billion share repurchase program authorized in February 2014.

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•	business and economic conditions and governmental policies affecting the agricultural industry where we or our customers operate, including price and demand volatility resulting from periodic imbalances of supply and demand;

•	changes in farmers’ application rates for crop nutrients;

•	changes in the operation of world phosphate or potash markets, including continuing consolidation in the crop nutrient industry, particularly if we do not participate in the consolidation;

•	pressure on prices realized by us for our products;

•	the expansion or contraction of production capacity or selling efforts by competitors or new entrants in the industries in which we operate, including the effects of proving runs by members of Canpotex, Limited (“Canpotex”) to prove the production capacity of potash expansion projects;

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the expected cost of MWSPC and our expected investment in it, the amount, terms, availability and sufficiency of funding for MWSPC from us, Saudi Arabian Mining Company, Saudi Basic Industries Corporation and existing or future external sources, the ability of MWSPC to obtain additional planned funding in acceptable amounts and upon acceptable terms, the timely development and commencement of operations of production facilities in the Kingdom of Saudi Arabia, political and economic instability in the region, and in general the future success of current plans for the joint venture and any future changes in those plans;

•	build-up of inventories in the distribution channels for our products that can adversely affect our sales volumes and selling prices;

•	the effect of future product innovations or development of new technologies on demand for our products;

•	seasonality in our business that results in the need to carry significant amounts of inventory and seasonal peaks in working capital requirements, and may result in excess inventory or product shortages;

•	changes in the costs, or constraints on supplies, of raw materials or energy used in manufacturing our products, or in the costs or availability of transportation for our products;

•	declines in our selling prices or significant increases in costs that can require us to write down our inventories to the lower of cost or market, or require us to impair goodwill or other long-lived assets, or establish a valuation allowance against deferred tax assets;

•	the effects on our customers of holding high cost inventories of crop nutrients in periods of rapidly declining market prices for crop nutrients;

•	the lag in realizing the benefit of falling market prices for the raw materials we use to produce our products that can occur while we consume raw materials that we purchased or committed to purchase in the past at higher prices;

•	customer expectations about future trends in the selling prices and availability of our products and in farmer economics;

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•	disruptions to existing transportation or terminaling facilities, including those of Canpotex or any joint venture in which we participate;

•	shortages or other unavailability of railcars, tugs, barges and ships for carrying our products and raw materials;

•	the effects of and change in trade, monetary, environmental, tax and fiscal policies, laws and regulations;

•	foreign exchange rates and fluctuations in those rates;

•	tax regulations, currency exchange controls and other restrictions that may affect our ability to optimize the use of our liquidity;

•	other risks associated with our international operations, including any potential adverse effects related to our joint venture interest in the Miski Mayo mine in the event that protests against natural resource companies in Peru were to extend to or impact the Miski Mayo mine;

•	adverse weather conditions affecting our operations, including the impact of potential hurricanes, excessive heat, cold, snow or rainfall, or drought;

•	difficulties or delays in receiving, challenges to, increased costs of obtaining or satisfying conditions of, or revocation or withdrawal of required governmental and regulatory approvals, including permitting activities;

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changes in the environmental and other governmental regulation that applies to our operations, including federal legislation or regulatory action expanding the types and extent of water resources regulated under federal law and the possibility of further federal or state legislation or regulatory action affecting greenhouse gas emissions or of restrictions or liabilities related to elevated levels of naturally-occurring radiation that arise from disturbing the ground in the course of mining activities or possible efforts to reduce the flow of nutrients into the Gulf of Mexico, the Mississippi River basin or elsewhere;

•	the potential costs and effects of implementation of federal or state water quality standards for the discharge of nitrogen and/or phosphorus into Florida waterways;

•	the financial resources of our competitors, including state-owned and government-subsidized entities in other countries;

•	the possibility of defaults by our customers on trade credit that we extend to them or on indebtedness that they incur to purchase our products and that we guarantee, particularly when we are exiting our business operations or locations that produced or sold the products to that customer;

•	any significant reduction in customers’ liquidity or access to credit that they need to purchase our products;

•	the effectiveness of our risk management strategy;

•	the effectiveness of the processes we put in place to manage our significant strategic priorities, including the expansion of our Potash business and our investment in MWSPC, and to successfully integrate and grow acquired businesses;

•	actual costs of various items differing from management’s current estimates, including, among others, asset retirement, environmental remediation, reclamation or other environmental obligations and Canadian resource taxes and royalties, or the costs of MWSPC, its existing or future funding and our commitments in support of such funding;

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the costs and effects of legal and administrative proceedings and regulatory matters affecting us, including environmental, tax or administrative proceedings, complaints that our operations are adversely impacting nearby farms, businesses, other property uses or properties, settlements thereof and actions taken by courts with respect to approvals of settlements, resolution of global tax audit activity, and other further developments in legal proceedings and regulatory matters;

•	the success of our efforts to attract and retain highly qualified and motivated employees;

•	strikes, labor stoppages or slowdowns by our work force or increased costs resulting from unsuccessful labor contract negotiations;

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•	brine inflows at our Esterhazy, Saskatchewan potash mine as well as potential inflows at our other shaft mines;

•	accidents involving our operations, including potential fires, explosions, seismic events, unsuccessful tailings management or releases of hazardous or volatile chemicals;

•	terrorism or other malicious intentional acts, including cybersecurity risks such as attempts to gain unauthorized access to, or disable, our information technology systems, or our costs of addressing malicious intentional acts;

•	other disruptions of operations at any of our key production and distribution facilities, particularly when they are operating at high operating rates;

•	changes in antitrust and competition laws or their enforcement;

•	actions by the holders of controlling equity interests in businesses in which we hold a noncontrolling interest;

•	changes in our relationships with other members of Canpotex or any joint venture in which we participate or their or our exit from participation in Canpotex or any such export association or joint venture, and other changes in our commercial arrangements with unrelated third parties;

•	the adequacy of our property, business interruption and casualty insurance policies to cover potential hazards and risks incident to our business, and our willingness and ability to maintain current levels of insurance coverage as a result of market conditions, our loss experience and other factors;

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difficulties in realizing the benefits of our long-term natural gas based pricing ammonia supply agreement with CF Industries, Inc., which will commence in 2017, including the risks that the cost savings initially anticipated from the agreement may not be fully realized over its term or that the price of natural gas or the market price for ammonia during the agreement's term are at levels at which the agreement’s natural gas based pricing is disadvantageous to us, compared with purchases in the spot market; and

•	other risk factors reported from time to time in our Securities and Exchange Commission reports.

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(a)	Evaluation of Disclosure Controls and Procedures

(b)	Changes in Internal Control Over Financial Reporting

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Nutrient Discharges into the Gulf of Mexico and Mississippi River Basin. On March 13, 2012, the Gulf Restoration Network, the Missouri Coalition for the Environment, the Iowa Environmental Council, the Tennessee Clean Water Network, the Minnesota Center for Environmental Advocacy, Sierra Club, the Waterkeeper Alliance, Inc., the Prairie Rivers Network, the Kentucky Waterways Alliance, the Environmental Law & Policy Center and the Natural Resources Defense Council, Inc. brought a lawsuit in the U.S. District Court for the Eastern District of Louisiana (the "Louisiana District Court") against EPA, seeking to require it to establish numeric nutrient criteria for nitrogen and phosphorous in the Mississippi River basin. In July 2011, EPA had denied the plaintiffs’ July 2008 petition seeking such standards. On May 30, 2012, the Louisiana District Court granted our motion to intervene in this lawsuit.

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