References in this Annual Report on Form 10-K (“Report”) to the “Partnership,” “SIRE,” “we,” “our,” “us,” or like terms refer to Sisecam Resources LP (formerly known as Ciner Resources LP) and its subsidiary, Sisecam Wyoming LLC (formerly known as Ciner Wyoming LLC), which is the consolidated subsidiary of the Partnership and referred to herein as “Sisecam Wyoming.” Sisecam Chemicals Resources LLC ("Sisecam Chemicals" formerly known as Ciner Resources Corporation) is 60% owned by Sisecam Chemicals USA Inc. ("Sisecam USA") and 40% owned by Ciner Enterprises Inc. (“Ciner Enterprises”). References to “our general partner” or “Sisecam GP” refer to Sisecam Resource Partners LLC (formerly known as Ciner Resource Partners LLC), the general partner of Sisecam Resources LP and a direct wholly-ownedwholly owned subsidiary of Sisecam Chemicals Wyoming LLC ("SCW LLC" formerly known as Ciner Wyoming Holding Co.), which is a direct wholly-ownedwholly owned subsidiary of Sisecam Chemicals. Sisecam Chemicals is a 60%-owned subsidiary of Sisecam USA, which is a direct wholly-ownedwholly owned subsidiary of Türkiye Şişe ve Cam Fabrikalari A.Ş, a Turkish corporation ("Şişecam Parent") which is an approximately 51%-owned subsidiary of Turkiye Is Bankasi Turkiye Is Bankasi ("Isbank"). Şişecam Parent is a global company operating in soda ash, chromium chemicals, flat glass, auto glass, glassware glass packaging and glass fiber sectors. Şişecam Parent was founded 86over 87 years ago, is based in Turkey and is one of the largest industrial publicly-listedpublicly listed companies on the Istanbul exchange. With production facilities in four continents and in 14 countries, Sisecam is one of the largest glass and chemicals producers in the world. Ciner Enterprises Inc. is a direct wholly-ownedwholly owned subsidiary of WE Soda Ltd., a U.K. Corporation (“WE Soda”). WE Soda is a direct wholly-ownedwholly owned subsidiary of KEW Soda Ltd., a U.K. corporation (“KEW Soda”), which is a direct wholly-ownedwholly owned subsidiary of Akkan Enerji ve Madencilik Anonim Şirketi (“Akkan”). Akkan is directly and wholly owned by Turgay Ciner, the Chairman of the Ciner Group (“Ciner Group”), a Turkish conglomerate of companies engaged in energy and mining (including soda ash mining), media and shipping markets. All of our soda ash processed is sold to various domestic and international customers.

We include cross references to captions elsewhere in this Report where you can find related additional information. The following table of contents tells you where to find these captions.

This Report contains, and our other public filings and oral and written statements by us and our management may include statements that constitute “forward-looking statements” within the meaning of the United States securities laws. Forward-looking statements include the information concerning our possible or assumed future results of operations, reserve estimates, business strategies, financing plans, competitive position, potential growth opportunities, potential operating performance, the effects of competition and the effects of future legislation or regulations. Forward-looking statements include all statements that are not historical facts and in some cases may be identified by the use of forward-looking terminology such as the words “believe,” “expect,” “plan,” “intend,” “seek,” “anticipate,” “estimate,” “predict,” “forecast,” “project,” “potential,” “continue,” “may,” “will,” “could,” “should” or the negative of these terms or similar expressions. Examples of forward-looking statements include, but are not limited to, statements concerning cash available for distribution and future distributions, if any, and such distributions are subject to the approval of the board of directors of our general partner and will be based upon circumstances then existing. We have based our forward-looking statements on management’s beliefs and assumptions and on information currently available to us.

Forward-looking statements involve risks, uncertainties and assumptions. You should not put undue reliance on any forward-looking statements. After the date of this Report, we do not have any intention or obligation to update any forward-looking statement, whether as a result of new information or future events, and expressly disclaim any obligation to do so except as required by applicable law.

The Partnership was formed in April 2013 by SCW LLC. The Partnership owns a controlling interest comprised of 51.0% membership interest in Sisecam Wyoming, which is one of the largest and lowest cost producers of natural soda ash in the world, serving a global market from our facility in the Green River Basin of Wyoming. Our facility has been in operation for more than 5060 years.

Our website also includes certain governance documents and policies such as our Code of Conduct, our Supplier Code of Conduct, our Corporate Governance Guidelines, our Internal Reporting and Whistleblower Protection Policy, our Insider Trading Policy and the charters of our Audit Committee and Conflicts Committee. The information on our website, or information about us on any other website, is not incorporated by reference into this Report. The SEC maintains an internet site at www.sec.gov that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC.

On December 21, 2021, Ciner Enterprises (which was the indirect owner of approximately 74% of the common units in the Partnership and 100% of the general partner), completed the following transactions pursuant to the definitive agreement which Ciner Enterprises entered into with Sisecam USA, a direct subsidiary of ŞişecamSisecam Parent on November 20, 2021 (“Purchase Agreement”):

We believe that the following competitive strengths better enable us to execute our business strategies and to achieve our objective of generating and growing cash available for distribution to our unitholders:

Our primary business objective is to generate stable cash flows through consistent growth in the production of soda ash, allowing us to make quarterly cash distributions to our common unitholders while growing our business. To achieve our objective, we intend to execute the following key business strategies:

We can provide no assurance that we will be able to utilize our strengths described above. For further discussion of the risks that we face, see Item 1A, “Risk Factors.”

Our Green River Basin surface operations are situated on approximately 2,360 acres in Wyoming (of which, 880 acres are owned), and our mining operations consist of approximately 23,50024,000 acres of leased and licensed subsurface mining area. Our facility is accessible by both road and rail. We use seven large continuous mining machines and fourteen underground shuttle cars in our mining operations. Our processing assets consist primarily of material sizing units, conveyors, calciners, dissolver circuits, thickener tanks, drum filters, evaporators and rotary dryers.

The following map provides an aerial overview of our surface operations:

The following map shows the known sodium leasing area within the Green River Basin, including the boundaries of our leased and licensed subsurface mining area:

The Green River Basin geological formation holds the largest, and one of the highest purity, known deposits of trona ore in the world. Our reserves contain trona deposits having a purity between 80% to 89% by weight, which means that insoluble impurities and water make up approximately 11% to 20% of our trona.

Our mining leases and license are located in two mining beds, designated by the U.S. Geological Survey as beds 24 and 25, at depths of 850 to 800 to 1100 feet near our shaft locations, respectively, below the surface. Mining these beds affords us several competitive advantages. First, the

The following graphic shows a cross-section of the strategic areas of the Green River Basin where we mine trona:

We remove insoluble materials and other impurities by thickening and filtering the liquor. We then add activated carbon to our filters to remove organic impurities, which can cause color contamination in the final product. The resulting clear liquid is then crystallized in evaporators, producing sodium carbonate monohydrate. The crystals are then drawn off and passed through a centrifuge to remove excess water. We then dry the resulting material in a product dryer to form anhydrous sodium carbonate, or soda ash. The resulting processed soda ash is then stored in on-site storage silos to await shipment by bulk rail or truck to distributors and end customers. Our storage silos can hold up to 58,900 short tons of processed soda ash at any given time. Our facility is in good working condition and has been in service for more than 5060 years.

For customers in North America, Sisecam Chemicals, on our behalf, typically enters into contracts, having terms ranging from one to three years. Under these contracts, our customers generally agree to purchase either minimum estimated volumes of soda ash or a certain percentage of their estimated soda ash requirements at a fixed price for a given calendar year. Although we do not have a “take or pay” arrangement with our customers, substantially all of our sales are made pursuant to written agreements and not through spot sales. In 2021,2022, we had more than 7080 domestic customers and in general, we have long-term relationships with the majority of our customers, meaning we have been a supplier to them for more than ten years.

Our customers including end users to whom ANSAC makes sales overseas, consist primarily of:

The following is a summary of the material terms of our leases and our license as of December 31, 2021:2022:

The foregoing descriptions of the material terms of our leases and our license do not purport to be complete descriptions of our leases and our license, and are qualified in their entirety by reference to the full text of the leases and license, as amended copies of which have been filed or incorporated by reference as exhibits to this Report. See Part IV, Item 15, “Exhibits and Financial Statement Schedules— Exhibit Index” for more information.

Our estimates of mineral resources and mineral reserves will change from time to time as a result of mining activities, analysis of new engineering and geologic data, modification of mining plans or mining methods and other factors. For additional information, see Item 1A, Risk Factors, “Risks Inherent in our Business and Industry” for more information regarding risks surrounding our reserves.

Soda ash is a commodity natural resource commodity traded globally with numerous producers and consumers worldwide. We compete with both North American and international soda ash producers. There are two ways to consider how we compete: (1) versus our fellow North American competitors; and (2) versus our worldwide competitors. Against our principal North American competitors, which include subsidiaries of Genesis, Solvay and Tata in the Green River Basin and Searles Valley Minerals in California, we believe we have a number of competitive advantages, including operational advantages that improve our relative cost position, life of our mineral reserves, our strong safety record, customer relationships and an experienced management team and workforce. Against our principal worldwide competitors, Solvay and various Chinese producers virtually all of their production is manufactured from synthetic processes and we believe, as a producer of soda ash from trona, we have competitive advantages when compared to synthetic producers, even after considering the fact that we generally have higher logistics costs to move the soda ash from Wyoming to regions around the world. The costs associated with procuring the materials needed for synthetic production are greater than the costs associated with mining trona. In addition, trona-based production consumes less energy and produces fewer undesirable by-products than synthetic production. See “Our Competitive Strengths” above for additional information.

Because all of our operations are conducted at a single facility, an event such as an explosion, fire, equipment malfunction or severe weather conditions could significantly disrupt our trona mining or soda ash production operations and our ability to supply soda ash to our customers. These hazards can also cause personal injury and loss of life, pollution or environmental damage and suspension of our surface and subsurface operations. To mitigate this risk, our Sponsors and/or their affiliates maintain, on our behalf, property, casualty and business interruption insurance in amounts and with coverage and deductibles that we believe are adequate for our current operations. We regularly evaluate our policy limits and deductibles as they relate to the overall cost and scope of our insurance coverage to account for changes or growth in our business.

Our mining and processing operations, which have been conducted at our Green River Basin facility since 1962, are subject to strict regulation by federal, state, and local authorities with respect to protection of the environment. We have a rigorous compliance program to ensure that our facilities comply with environmental laws and regulations. However, we are involved from time to time in administrative and judicial proceedings and inquiries relating to environmental matters. Modifications or changes in enforcement of existing laws and regulations or the adoption of new laws and regulations in the future, particularly with respect to environmental or climate change, or changes in the operation of our business or the discovery of additional or unknown environmental contamination, could require expenditures that might be material to our results of operations or financial condition.

We summarize below certain environmental laws applicable to us that regulate discharges of substances into the air and water, the management and disposal of hazardous and non-hazardous substances and wastes, the clean-up of contaminated sites, the protection of groundwater quality and availability, plant and wildlife protection, and climate change. Our failure to comply with any of the below laws may result in the assessment of administrative, civil and criminal penalties, the imposition of clean-up and site restoration costs and liens, the issuance of injunctions to limit or cease operations, the suspension or revocation of permits and other enforcement measures that could have the effect of limiting production from our operations.

Our operations are subject to oversight by the Land Quality Division of Wyoming Department of Environmental Quality (“WDEQ”). Our principal mine permit issued by the Land Quality Division, requires the Partnership to provide financial assurances for our reclamation obligations for the estimated future cost to reclaim the area of our processing facility, surface pond complex and

The federal Clean Air Act and comparable state laws restrict the emission of air pollutants from many sources. Under the Clean Air Act, our facility has been issued a Title V operating permit, which regulates emissions to air from our operations. In particular, our operations are subject to technology-based standards pursuant to the Clean Air Act’s New Source Performance Standards for Nonmetallic Mineral Processing Plants, which limit particulate matter emissions. Under associated Clean Air Act regulations our operation is also subject to Best Available Control Technology (“BACT”) requirements. In addition, our boilers are subject to technology-based standards pursuant to the Clean Air Act’s National Emission Standards for Hazardous Air Pollutants for Major Source: Industrial, Commercial and Institutional Boilers and Process Heaters, which were published in final form in November 2015. These laws and regulations may require us to obtain pre-approval for the construction or modification of certain projects or facilities expected to produce or significantly increase air emissions, obtain and strictly comply with stringent air permit requirements orand utilize specific equipment or technologies to control emissions of certain pollutants.

The Federal Water Pollution Control Act, which we refer to as the Clean Water Act, and comparable state laws impose restrictions and controls regarding the discharge of pollutants into regulated waters. The discharge of pollutants into regulated waters is prohibited, except in accordance with the terms of a permit issued by the federal Environmental Protection Agency (EPA)(“EPA”) or the state. We do not discharge any wastewater or stormwater from our operations into the Green River, the nearest river system to our Green River Basin facility. However, the discharge of storm water runoff from ourThe facility is governed byoperates under a general permit issued by the WDEQ. In particular, the general permitfor storm water which requires our compliance with a Storm Water Pollution Prevention Plan. We periodically monitor groundwater wells at our processing facility, most of which are proximate to our surface pond complex, for salinity, conductivity and other parameters pursuant to permits issued by the WDEQ. Permitted interceptor trenches are used to collect saline groundwater to minimize impact to the Green River.

The federal Comprehensive Environmental Response, Compensation, and Liability Act (“CERCLA”) (otherwise known as “Superfund”), and comparable state laws impose liability in connection with the release of hazardous substances into the environment. CERCLA imposes liability, without regard to fault or the legality of the original conduct, on certain classes of persons that are considered to have contributed to the release of a hazardous substance into the environment. These persons include the current and past owner or operator of the disposal site or the site where the release occurred and those who disposed or arranged for the disposal of the hazardous substances at the site where the release occurred. Under CERCLA, such persons may be subject to joint and several liability for the costs of cleaning up the hazardous substances that have been released into the environment and for damages to natural resources. Wyoming’s Environmental Quality Act also creates the potential for liability in connection with the release of hazardous substances into the environment and has been construed to impose liability without regard to fault. We have not received notice that we are a potentially responsible party at any Superfund site.

In response to findings that emissions of carbon dioxide, methane and other greenhouse gases or GHGs,(“GHGs”) present an endangerment to public health and the environment, the EPA has adopted rules requiring the monitoring and annual reporting of GHG emissions from specified sources, including soda ash processors like us. We are monitoring and reporting GHG emissions from our operations, and we believe we are in compliance with the rules. In the past, the U.S. Congress has considered, but not enacted, legislation that would impose requirements to reduce emissions of GHGs. The State of California has enacted regulations establishing a so-called GHG “cap-and-trade” system designed to reduce GHG emissions. Our operations are not currently subject to any federal or state requirement to reduce GHG emissions. Although it is not possible at this time to predict how legislation or new regulations that may be adopted to address GHG emissions would impact our business, any such future laws and regulations limiting, or otherwise imposing a tax or financial penalty for, emissions of GHGs from our equipment and operations might be material to our results of operations or financial condition.