UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

 (Mark One)

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

For the quarterly period ended      September 30, 2017March 31, 2018      

OR

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

For the transition period from               to              

Commission File Number.   001-39278

SOLITARIO ZINC CORP.

(Exact name of registrant as specified in its charter)

Indicate by checkmark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every

Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and emerging“emerging growth companycompany” in Rule 12b-2 of the Exchange Act.

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

 There were 58,443,06658,332,266 shares of $0.01 par value common stock outstanding as of November 8, 2017.

May 01, 2018.

TABLE OF CONTENTS

PART I - FINANCIAL INFORMATION

Item 1.Financial Statements

SOLITARIO ZINC CORP.

CONDENSED CONSOLIDATED BALANCE SHEETS

See Notes to Unaudited Condensed Consolidated Financial Statements

SOLITARIO ZINC CORP.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

See Notes to Unaudited Condensed Consolidated Financial Statements

SOLITARIO ZINC CORP.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)CASH FLOWS

(Unaudited)

See Notes to Unaudited Condensed Consolidated Financial Statements

SOLITARIO ZINC CORP.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

See Notes to Unaudited Condensed Consolidated Financial Statements

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1.       Business and Significant Accounting Policies

Business and company formation

Solitario Zinc Corp. (“Solitario,” or the “Company”) is an exploration stage company as defined in Industry Guide 7, as issued by the United States Securities and Exchange Commission (“SEC”). Solitario was incorporated in the state of Colorado on November 15, 1984 as a wholly-owned subsidiary of Crown Resources Corporation ("Crown"). In July 1994, Solitario became a publicly traded company on the Toronto Stock Exchange (the "TSX") through its initial public offering. Solitario has been actively involved in mineral exploration since 1993. Solitario’s primary business is to acquire exploration mineral properties or royalties and/or discover economic deposits on its mineral properties and advance these deposits, either on its own or through joint ventures, up to the development stage. At that point, or sometime prior to that point, Solitario would likely attempt to sell its mineral properties, pursue their development either on its own, or through a joint venture with a partner that has expertise in mining operations, or create a royalty with a third party that continues to advance the property. As a result of the Acquisition (defined below), Solitario is now primarily focused on the acquisition and exploration of zinc-related exploration mineral properties. In addition to focusing on its mineral exploration properties and the evaluation of mineral properties for acquisition or purchase of royalty interests, Solitario also evaluates potential strategic transactions for the acquisition of new precious and base metal properties and assets with exploration potential or business combinations that Solitario determines to be favorable to Solitario.

Solitario has recorded revenue in the past from the sale of mineral property, including the sale in 2015 of its former interest in Mount Hamilton LLC (“MH-LLC”) the owner of its former Mt. Hamilton project (the “Mt. Hamilton Transaction”), and joint venture property payments and the sale of a royalty on its former Mt. Hamilton project. Revenues from the sale or joint venture of properties or assets, although significant when they occur, have not been a consistent annual source of revenue and would only occur in the future, if at all, on an infrequent basis.

Solitario currently considers its carried interest in the Florida Canyon project and its interest in the Lik project to be its core mineral property assets. Solitario’s joint venture partner is expected to continue the development and furtherance of the Florida Canyon project and Solitario will monitor progress at Florida Canyon. Solitario is working with its 50% joint venture partner, Teck American Incorporated, a wholly-owned subsidiary of Teck Resources Limited ( both companies referred to as “Teck”), in the Lik deposit to further the exploration and evaluate potential development plans for the Lik project.

As of March 31, 2018, Solitario has significant balances of cash and short-term investments that Solitario anticipates using, in part, to further the development of the Florida Canyon and Lik projects and to potentially acquire additional mineral property assets. The fluctuations in precious metal and other commodity prices contribute to a challenging environment for mineral exploration and development, which has created opportunities as well as challenges for the potential acquisition of early-stage and advanced mineral exploration projects or other related assets at potentially attractive terms.

The accompanying interim condensed consolidated financial statements of Solitario for the three months ended March 31, 2018 are unaudited and are prepared in accordance with accounting principles generally accepted in the United States of America (“generally accepted accounting principles”). They do not include all disclosures required by generally accepted accounting principles for annual financial statements, but in the opinion of management, include all adjustments, consisting only of normal recurring items, necessary for a fair presentation. Interim results are not necessarily indicative of results, which may be achieved in the future or for the full year ending December 31, 2018.

These financial statements should be read in conjunction with the financial statements and notes thereto which are included in Solitario’s Annual Report on Form 10-K for the year ended December 31, 2017. The accounting policies set forth in those annual financial statements are the same as the accounting policies utilized in the preparation of these financial statements, except as modified for appropriate interim financial statement presentation.

Recent developmentsDevelopments

Purchase of Zazu

On July 12, 2017, Solitario Zinc Corp. (“Solitario” or the “Company”) completed the acquisition of Zazu Metals Corp. (“Zazu”) pursuant to a definitive arrangement agreement between Solitario and Zazu (the "Arrangement Agreement") whereby Solitario agreed to acquire all of the issued and outstanding common shares of Zazu (the "Zazu Shares") by way of a statutory plan of arrangement (the "Arrangement") under theCanada Business Corporations Act (the “Acquisition”). The Arrangement was approved by the Ontario (Canada) Superior Court of Justice on July 7, 2017. Per the Arrangement, Solitario issued 19,788,177 shares of its common stock on July 12, 2017 in exchange for all of the issued and outstanding Zazu Shares, which represented 0.3572 shares of Solitario common stock for each outstanding Zazu Share. Zazu had one primary asset, its interest in the Lik project, and the Acquisition was treated as an asset purchase in accordance with ASU 2017-01 “Business Combinations.” Solitario granted stock options to acquire an aggregate of 1,782,428 shares of Solitario common stock to Zazu option holders the (“Replacement Options”) in connection with the Acquisition. The issuance of the shares of Solitario common stock as consideration for the Acquisition was approved at the 2017 annual meeting of Solitario shareholders held on June 29, 2017 (the “Annual Meeting”), with 98.27% of the Solitario shareholders who voted voting “for” the issuance of the shares pursuant to the Arrangement Agreement. The total purchase price of $16,227,000$16,110,000 was recorded during the three and nine month periods ending September 30, 2017 is detailed below. Results of operations for Zazu are included in Solitario’s condensed consolidated financial statements from the date of the Acquisition.

The Acquisition was treated as an asset purchase in accordance with Accounting Standards Update No. 2017-01, “Business Combinations,” (“ASU 2017-01”). Solitario adopted the provisions of ASU 2017-01 during the quarter ended September 30, 2017, which provides guidance on the classification of the treatment of business acquisitions as either the purchase of an asset or the purchase of a business. See “Recent Accounting Pronouncements, below. Accordingly, as the purchase of an asset (essentially the interest in the Lik project in Alaska) Solitario capitalized related transaction costs associated with the Acquisition, including the following costs:

The purchase price was allocated to the fair value of the assets and liabilities acquired from Zazu on the date of the Acquisition as follows:

The transaction costs and accounts payable assumed, and subsequently paid, less the cash acquired are shown as the cash transaction costs for the nine months ended September 30, 2017 on the condensed consolidated statement of cash flows.

Name Change to Solitario Zinc Corp.

Solitario shareholders voted at the Annual Meeting in favor of an amendment to Solitario’s Articles of Incorporation to change Solitario’s name to “Solitario Zinc Corp.” from “Solitario Exploration & Royalty Corp.” The name change was subject to the completion of the Acquisition and became effective on July 17, 2017. Subsequent to the Acquisition, Solitario’s core mineral property assets are its 39% ownership in the Florida Canyon zinc project (formerly called the Bongará zinc project) in Peru and its 50% ownership interest in the Lik zinc deposit (acquired in the Acquisition).

Convertible Debenture Financing

On April 26, 2017, concurrent with the signing of the Arrangement Agreement, Solitario provided Zazu interim debt financing through a secured convertible debenture issued by Zazu in the principal amount of US$1.5 million (the "Debenture"). The Debenture was secured by way of a general security and pledge agreement on Zazu’s assets and bore interest at a rate of 5% per annum. The Debenture was convertible, at the option of Solitario into Zazu Shares at a price of US$0.22 per Zazu Share. Upon completion of the Acquisition, the Debenture was cancelled.

Business and company formation

Solitario is an exploration stage company with a focus on the acquisition of precious and base metal properties with exploration potential and the development or purchase of royalty interests. As a result of the Acquisition, Solitario is more focused on the acquisition and exploration of zinc-related exploration mineral properties. However, Solitario intends to continue to evaluate for acquisition other mineral properties and hold a portfolio of mineral exploration properties and assets for future sale, joint venture or to create a royalty prior to the establishment of proven and probable reserves. Although Solitario’s mineral properties may be developed in the future by Solitario, through a joint venture or by a third party, Solitario has never developed a mineral property. In addition to focusing on its current assets and the evaluation of mineral properties for acquisition or purchase of royalty interests, Solitario also expects to continue to evaluate potential strategic corporate transactions for the acquisition of new precious and base metal properties and assets with exploration potential or business combinations it believes to be favorable to Solitario.

Solitario has recorded revenue in the past from the sale of mineral properties, including the sale in 2015 of its former interest in Mount Hamilton LLC (“MH-LLC”), the owner of the Mt. Hamilton project, joint venture property payments and the sale of a royalty on its former Mt. Hamilton property. Proceeds from the sale or joint venture of Solitario’s properties and assets, although significant, have not historically been a consistent annual source of cash or revenue and would occur, if at all, on an infrequent basis in the future.

Solitario currently considers its carried interest in the Florida Canyon project and its interest in the Lik project (acquired in the Acquisition) to be its core mineral property assets. Solitario’s joint venture partner is expected to continue the development and furtherance of the Florida Canyon project and Solitario will monitor progress at Florida Canyon. Solitario is currently evaluating the exploration and development plans for the Lik project.

As of September 30, 2017, Solitario has significant balances of cash and short-term investments that Solitario anticipates using, in part, to further the development of the Lik project and to potentially acquire additional mineral property assets. The fluctuations in precious metal and other commodity prices has contributed to a challenging environment for mineral exploration and development, which has created opportunities as well as challenges for the potential acquisition of early-stage and advanced mineral exploration projects or other related assets at potentially attractive terms.

The accompanying interim condensed consolidated financial statements of Solitario for the three and nine months ended September 30, 2017 are unaudited and are prepared in accordance with accounting principles generally accepted in the United States of America (“generally accepted accounting principles”). They do not include all disclosures required by generally accepted accounting principles for annual financial statements, but in the opinion of management, include all adjustments, consisting only of normal recurring items, necessary for a fair presentation. Interim results are not necessarily indicative of results, which may be achieved in the future or for the full year ending December 31, 2017.

These financial statements should be read in conjunction with the financial statements and notes thereto which are included in Solitario’s Annual Report on Form 10-K for the year ended December 31, 2016. The accounting policies set forth in those annual financial statements are the same as the accounting policies utilized in the preparation of these financial statements, except as modified for appropriate interim financial statement presentation.2017.

Financial reporting

The condensed consolidated financial statements include the accounts of Solitario and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. The condensed consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States of America ("generally accepted accounting principles,principles") and are expressed in U.SU.S. dollars.

Revenue recognition

Solitario records delay rental payments as revenue in the period received. Any payments received for the sale of property interests are recorded as a reduction of the related property's capitalized cost. Proceeds which exceed the capitalized cost of the property without reserves are recognized as revenue. Payments received on the sale of properties with reserves are recognized as revenue to the extent the proceeds exceed the proportionate basis in the assets sold. There were no delay rentals in the periods presented.

Use of estimates

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Some of the more significant estimates included in the preparation of Solitario's financial statements pertain to: (i) Solitario’s carrying value of short-term investments; (ii) the recoverability of mineral properties related to its mineral exploration properties and their future exploration potential; (iii) the fair value of stock option grants to employees;employees, to officers and directors and to others; (iv) the ability of Solitario to realize its deferred tax assets; and (v) Solitario's investment in marketable equity securities.

In performing its activities, Solitario has incurred certain costs for mineral properties. The recovery of these costs is ultimately dependent upon the sale of mineral property interests or the development of economically recoverable ore reserves and the ability of Solitario to obtain the necessary permits and financing to successfully place the properties into production, and upon future profitable operations, none of which is assured.

Cash equivalents

Cash equivalents include investments in highly liquid money-market securities with original maturities of three months or less when purchased. As of September 30, 2017,March 31, 2018, a portion of Solitario’s cash and cash equivalents are held in brokerage accounts and foreign banks, which are not covered under the Federal Deposit Insurance Corporation (“FDIC”) rules for the United States. At September 30, 2017,March 31, 2018, Solitario holds short-term investments in United States Treasury securities (“USTS”) of $10,723,000.

$9,976,000.

Short-term investments

As of September 30, 2017,March 31, 2018, Solitario has $10,723,000$9,976,000 of its current assets in USTS with maturities of 3015 days to 1921 months. The USTS are recorded at their fair value, based upon quoted market prices. As of September 30, 2017, Solitario has $1,248,000March 31, 2018, we have $1,247,000 in separate bank certificates of deposit (“CDs”) each with a maximum value of $250,000, and each of which are covered by FDIC insurance to the full facefull-face value of the CDs. At September 30, 2017,March 31, 2018, the CDs have maturities of between 30 days4 and 1815 months. Solitario’s short-term investments are recorded at their fair value, based upon quoted market prices. The short-term investments are highly liquid and may be sold in their entirety at any time at their quoted market price and are classified as a current asset.

Mineral properties

Solitario expenses all exploration costs incurred on its mineral properties prior to the establishment of proven and probable reserves through the completion of a feasibility study. Initial acquisition costs of Solitario’s mineral properties are capitalized. Solitario capitalizes all of its development expenditures on its projects, subsequent to the completion of a feasibility study. Solitario regularly performs evaluations of its investment in mineral properties to assess the recoverability and/or the residual value of its investments in these assets. All long-lived assets are reviewed for impairment whenever events or circumstances change which indicate the carrying amount of an asset may not be recoverable, utilizing established guidelines based upon undiscounted future net cash flows from the asset or upon the determination that certain exploration properties do not have sufficient potential for economic mineralization.

Derivative instruments

Solitario accounts for its derivative instruments in accordance with ASC 815, "Accounting for Derivative Instruments and Hedging Activities" (“ASC 815”). Solitario acquired its investment in Vendetta units, including the Vendetta Warrants during 2016. During the three and nine months ended September 30, 2017 Solitario exercised all of its Vendetta Warrants (as defined below in Note 4) and no longer owns any Vendetta Warrants. See Note 4 below. Solitario classified the Vendetta Warrants as derivative instruments under ASC 815 and prior to their exercise recorded the Vendetta Warrants at their fair value as other assets on the consolidated balance sheet. Changes in fair value of the Vendetta Warrants are recognized in the statement of operations in the period of change as gain or loss on derivative instruments. Solitario has entered into covered calls from time to time on its investment in Kinross Gold Corporation (“Kinross”) marketable equity securities. In addition, during 2017 and 2016, Solitario owned warrants exercisable to acquire shares of Vendetta Mining Corp. (“Vendetta”) common stock (the “Vendetta Warrants”). Each Vendetta warrant allowed Solitario to purchase one share of Vendetta common stock at a price of Cdn$0.10 per share for a period of two years. Solitario has not designated its covered calls as hedging instruments and any changes in the fair value of the covered calls and its Vendetta Warrants are recognized in the statement of operations in the period of the change as gain or loss on derivative instruments.

Fair value

Financial Accounting Standards Board (“FASB”)FASB ASC 820, “Fair Value Measurements and Disclosures” (“ASC 820”), establishes a framework for measuring fair value and requires enhanced disclosures about fair value measurements. ASC 820 clarifies that fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. For certain of Solitario's financial instruments, including cash and cash equivalents and accounts payable, the carrying amounts approximate fair value due to their short-term maturities. Solitario's short-term investments in USTS and CDs, its marketable equity securities and any covered call options against those marketable equity securities are carried at their estimated fair value based on quoted market prices. The fair value of Solitario’s investment in the Vendetta Warrants was determined by a Black-Scholes model.

Marketable equity securities

Solitario's investments in marketable equity securities are classified as available-for-sale and are carried at fair value, which is based upon quoted prices of the securities owned. Solitario records investments in marketable equity securities as available-for-sale for investments in publicly traded marketable equity securities for which it does not exercise significant control and where Solitario has no representation on the board of directors of those companies and exercises no control over the management of those companies. The cost of marketable equity securities sold is determined by the specific identification method. ChangesDuring the first three months of 2018 Solitario adopted ASU 2016-01, “Financial Instruments – Recognition and Measurement of Financial Assets and Financial Liabilities (Topic 825)” (“ASU 2016-01”). In accordance with ASU 2016-01, changes in fair value are recorded in accumulated other comprehensive income within shareholders' equity, unless a decline in fair value is considered other than temporary, in which case the decline is recognized as a loss in the consolidated statementsstatement of operations.

operations during the period of the change. During the first three months of 2018 Solitario recorded a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption of ASU 2016-01. See Note 9, “Shareholders’ Equity and Other Comprehensive Income”, below.

Foreign exchange

The United States dollar is the functional currency for all of Solitario's foreign subsidiaries. Although Solitario's South American exploration activities during 2017 and 2016the first quarter of 2018 have been conducted primarily in Peru, a portion of the payments under the land, leasehold and exploration agreements of Solitario are denominated in United States dollars. Realized foreign currency gains and losses are included in the results of operations in the period in which they occur.

Income taxes

Solitario accounts for income taxes in accordance with ASC 740, “Accounting for Income Taxes” (“ASC 740”). Under ASC 740, income taxes are provided for the tax effects of transactions reported in the financial statements and consist of taxes currently due plus deferred taxes related to certain income and expenses recognized in different periods for financial and income tax reporting purposes. Deferred tax assets and liabilities represent the future tax return consequences of those differences, which will either be taxable or deductible when the assets and liabilities are recovered or settled. Deferred taxes are also recognized for operating losses and tax credits that are available to offset future taxable income and income taxes, respectively. A valuation allowance is provided if it is more likely than not that some portion or all of the deferred tax assets will not be realized.

Accounting for uncertainty in income taxes

ASC 740 clarifies the accounting for uncertainty in income taxes recognized in a company's financial statements. ASC 740 prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. ASC 740 also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition. ASC 740 provides that a company's tax position will be considered settled if the taxing authority has completed its examination, the company does not plan to appeal, and it is remote that the taxing authority would reexamine the tax position in the future. TheseThe provisions of ASC 740 had no effect on Solitario's financial position or results of operations.

Earnings per share

The calculation of basic and diluted earnings (loss) per share is based on the weighted average number of shares of common stock outstanding during the three and nine months ended September 30, 2017March 31, 2018 and 2016.2017. Potentially dilutive shares totaling 1,928,428 related to outstanding common stock options of 2,082,428 Solitario common shares for the three and nine months ended September 30, 2017March 31, 2018 were excluded from the calculation of diluted earnings (loss) per share because the effects were anti-dilutive. There were no similar potentially dilutive securities outstanding during the three and nine months ended September 30, 2016.March 31, 2017.

Employee stock compensation and incentive plans

Solitario classifies all of its stock options as equity options in accordance with the provisions of ASC 718, “Compensation – Stock Compensation.”

Recent accounting pronouncements

On January 5, 2017, the Financial Accounting Standards Board issued ASU 2017-01. ASU 2017-01 clarified the definition of the acquisition of a business or an asset under Accounting Codification Standard 805 (“ASC 804”). ASU 2017-10 utilizes a series of tests or screens to determine if a business combination is the acquisition of a single identifiable asset or of a business. Under the definition of ASU 2017-01, the Acquisition would fall under the classification of the acquisition of an asset. ASU 2017-01 is effective for fiscal years beginning after December 15, 2017, with early adoption permitted. Solitario adopted the provisions of ASU 2015-01 during the three months ended September 30, 2017, and has accounted for the Acquisition in accordance with the provisions of ASU 2017-01. The adoption of ASU 2017-01 had no other effect on Solitario’s consolidated financial position.

In May 2014, the FASB issued Accounting Standards Update ("ASU") 2014-09,Revenue from Contracts with Customers (Topic 606, (“ASU No. 2014-09”), which amended the existing accounting standards for revenue recognition. ASU No. 2014-09 establishes principles for recognizing revenue upon the transfer of promised goods or services to customers, in an amount that reflects the expected consideration received in exchange for those goods or services. In July 2015, the FASB deferred the effective date for annual reporting periods beginning after December 15, 2017. The amendments may be applied retrospectively to each prior period (full retrospective) or retrospectively with the cumulative effect recognized as of the date of initial application (modified retrospective). Solitario will adopt ASU 2014-09 in the first quarter of 2018 and apply the full retrospective approach and does not expect the impact on its consolidated financial statements to be material.

In February 2016, the FASB issued ASU 2016-02, “Leases” (“ASU No. 2016-02”), which will require lessees to recognize a right-of-use asset and a lease liability for all leases that are not short-term in nature. For a lessor, the accounting applied is also largely unchanged from previous guidance. The new rules will be effective for Solitario in the first quarter of 2019. Solitario does not anticipate early adoption. As ASU No. 2016-02 does not apply to mineral leases, Solitario does not expect the adoption of ASU No. 2016-02 to materially change its current accounting methods and therefore it does not expect the adoption to have a material impact on its consolidated financial position or results of operations.

In January 2016 the FASB issued ASU No 2016-01 Financial Instruments – Recognition and Measurement of Financial Assets and Financial Liabilities (Topic 825) (“ASU No. 2016-01”). ASU No. 2016-01 revises the classification and measurement of investment in certain equity investments and the presentation of certain fair value changes for certain financial liabilities measured at fair value. ASU No. 2016-01 requires the change in fair value of many equity investments to be recognized in net income. ASU No. 2016-01 is effective for interim and annual periods beginning after December 15, 2017, with early adoption permitted. Solitario will adoptadopted ASU No. 2016-01 in the first quarter of 2018. AdoptionSolitario recorded a cumulative-effect adjustment for the change in accounting principle to retained earnings of $576,000 related to the adoption of ASU 2016-01. See Note 9, “Shareholders’ Equity and Accumulated Other Comprehensive Income,” below.

In February 2018, the FASB issued ASU No. 2016-01 may result in2018-02, “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income” (ASU 2018-02), which allows for a cumulative effect adjustmentreclassification from accumulated other comprehensive income or loss to the consolidated statement of equity retained earnings asor accumulated deficit for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017 (“TCJA”). ASU 2018-02 also requires certain related disclosures. ASU 2018-02 is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2018 and should be applied either in the period of adoption or retrospectively to each period in which the effect of the beginning ofchange in the year of adoption.U.S. federal corporate income tax rate in the TCJA is recognized. Early adoption is permitted. Solitario is currently evaluating the new guidance and has not determined the impact of ASU No. 2016-012018-02 but does not believe it will have a material effect on its consolidatedSolitario’s financial statements.position or results of operations.

2.        Mineral Property

The following table details Solitario’s investment in Mineral Property:

Initial acquisition costs on our mineral property are capitalized. All exploration costs on our exploration properties, none of which have proven and probable reserves, including any additional costs incurred for subsequent lease or property payments and ongoingor exploration activities related to our projects are expensed as incurred. Solitario acquired the Lik project during the three and nine months ended September 30, 2017 in the Acquisition, see Note 1 “Recent developments” above.

Discontinued projects

Solitario dropped its royalty interests in the Aconchi and Norcan exploration properties in Mexico during the nine months ended September 30, 2017: however, there were no capitalized mineral property costs related to these royalties and Solitario did not record any mineral property write-downs during the nine months ended September 30, 2017. During the nine months ended September 30, 2016, Solitario closed its exploration office in Mexico. Solitario recorded a mineral property write-down of $10,000 related to the Norcan and Aconchi properties during the nine months ended September 30, 2016. In addition, Solitario recorded a loss on other assets in Mexico of $14,000 related to the exit from its exploration activities in Mexico during the nine months ended September 30, 2016.

Exploration expense

The following items comprised exploration expense:

Asset Retirement Obligation

In connection with the Acquisition, Solitario recorded an asset retirement obligation of $125,000 for Solitario’s estimated reclamation cost of the existing disturbance at the Lik project. This disturbance consists of an exploration camp including certain drill sites and access roads at the camp. The estimate was based upon estimated cash costs for reclamation as determined by the permitting bond required by the State of Alaska, for which Solitario has purchased a reclamation bond insurance policy in the event Solitario or its 50% partner, Teck, Resources Limited (“Teck”) do not complete required reclamation.

Solitario has not applied a discount rate to the recorded asset retirement obligation as the estimated time frame for reclamation is not currently known, as reclamation is not expected to occur until the end of the Lik project life, which would follow future development and operations, the start of which cannot be estimated or assured at this time. Additionally, no depreciation will be recorded on the related asset for the asset retirement obligation until the Lik project goes into operation, which cannot be assured.

3.        Marketable Equity Securities

Solitario's investments in marketable equity securities are classified as available-for-sale and are carried at fair value, which is based upon quoted prices of the securities owned. The cost of marketable equity securities sold is determined by the specific identification method. Changes in market value are recorded in accumulated other comprehensive income or loss within shareholders' equity, unless a decline in market value is considered other than temporary, in which case the decline is recognized as a loss in the consolidated statement of operations.

The following tables summarize Solitario’s During the three months ended March 31, 2018, Solitario recorded an unrealized loss on marketable equity securities and accumulated other comprehensive income related to its marketable equity securities:

The following table represents changes in marketable equity securities.

$441,000. During the three and nine months ended September 30,March 31, 2017, Solitario recorded an unrealized gain on marketable equity securities of $128,000.

On May 2, 2016 Solitario purchased 7,240,000 units of Vendetta for aggregate consideration of $289,000. Each unit included one common share of Vendetta and one Vendetta Warrant. The total purchase price for the units of $289,000 was allocated between the Vendetta common shares and the Vendetta Warrants based upon total fair values on the date of purchase. The Vendetta common shares were allocated a purchase cost of $186,000 and the Vendetta Warrants were allocated a purchase cost of $103,000. During the three months ended March 31, 2017, Solitario sold 2,000,000 and 3,480,000, respectively, Vendetta1,480,000 common shares of Vendetta for cash proceeds of $407,000$259,000, and $666,000.a recorded cost of $38,000. In addition, during the three and nine months ended September 30,March 31, 2017 Solitario exercised 2,240,000 of the Vendetta Warrants discussed below in Note 4, “Other assets”it held and received 5,000,000 and 7,240,000, respectively,2,240,000 Vendetta common shares, by paying $167,000 (Cdn$224,000) to Vendetta. The cost of Vendetta. Solitario transferredthe common shares received from the exercise of the Vendetta Warrants was recorded based upon the total of the (i) exercise price of the Vendetta Warrants exercised, $167,000, and (ii) the fair value of the Vendetta Warrants on the date of exercise, which equaled their intrinsic value, $309,000, for a total value of $642,000 and $949,000, respectively, along with the cash paid$476,000. During 2017, subsequent to exercise theMarch 31, 2017, Solitario exercised its remaining 5,000,000 Vendetta Warrants of $411,000by paying $441,000 and $578,000, respectively, to marketable equity securities as the cost of the 5,000,000 and 7,240,000owns 11,000,000 common shares of Vendetta acquired,and no Vendetta Warrants as discussed belowof March 31, 2018 and December 31, 2017.

The following tables summarize Solitario’s marketable equity securities and adjustments to fair value:

The following table represents changes, including sales, in Note 4, “Other Assets.”marketable equity securities during the three months ended March 31, 2018 and 2017:

4.        Other Assets

The following items comprised other assets:

During the three and nine months ended September 30, 2017, Solitario acquired $100,000 of exploration-related equipment at the Lik project as part of the Acquisition. See Note 1, “Recent developments’” above. The equipment is being depreciated over a five-year life on a straight-line basis and Solitario recorded depreciation expense of $5,000 during the three and nine months ended September 30, 2017 related to this equipment.

During the nine months ended September 30, 2016, Solitario purchased 7,240,000 units of Vendetta for $289,000. Each unit included one common share and one purchase warrant which allows the holder to purchase one share of Vendetta common stock at a price of Cdn$0.10 per share for a period of two years (the “Vendetta Warrants”). As of September 30, 2017, the Vendetta shares are carried at their fair value and included in marketable equity securities, see Note 3, above. The Vendetta Warrants are carried at their fair value, based upon a Black-Scholes valuation model, see Note 5, “Derivative Instruments,” below.

During the three and nine months ended September 30, 2017, Solitario exercised 5,000,000 and 7,240,000, respectively, of its Vendetta Warrants and received 5,000,000 and 7,240,000, respectively, Vendetta common shares, by paying $411,000 and $578,000, respectively, in cash to Vendetta. As a result, as of September 30, 2017, Solitario no longer owns any Vendetta Warrants. Upon the exercise of the Vendetta Warrants, during the three and nine months ended September 30, 2017 Solitario transferred the fair value of the Vendetta Warrants on the date of exercise of $642,000 and $949,000, respectively, along with the cash paid to exercise the Vendetta Warrants of $411,000 and $578,000, respectively, to marketable equity securities as the cost of the 5,000,000 and 7,240,000 common shares of Vendetta acquired.

5.        Derivative Instruments

Vendetta Warrants

During the three and nine months ended September 30,March 31, 2017, Solitario recorded a (loss) gain on derivative instrumentsexercised 2,240,000 of $(31,000) and $216,000, respectively, related to the Vendetta Warrants based upon the changes init held and received 2,240,000 Vendetta common shares, by paying $167,000 (Cdn$224,000) to Vendetta. As a result, as of March 31, 2017, Solitario owned 5,000,000 Vendetta Warrants, which are carried at fair value, of Vendetta Warrants determined based upon a Black-Scholes model. During the three and nine months ended September 30, 2016,March 31, 2017, Solitario recorded a gain on derivative instruments of $91,000 and $306,000, respectively,$148,000, related to the Vendetta Warrants.

RMB Solitario owned no Vendetta Warrants

The warrants originally issued by Solitario in 2012 to RMB Australia Holdings Limited (the “RMB Warrants”) entitled the holder to purchase a total of 1,624,748 shares of Solitario common stock. The RMB Warrants had an exercise price of $1.54 per share and expired on August 21, 2016. Solitario recorded a gain on the RMB Warrants of $4,000 during the ninethree months ended September 30, 2016.March 31, 2018; see Note 3, “Marketable equity securities,” above.

Covered Call Options

From time to time Solitario has sold covered call options against its holdings of Kinross. The business purpose of selling covered calls is to provide additional liquidity on a limited portion of shares of Kinross that Solitario may sell in the near term, which is generally defined as less than one year. Solitario has not designated its covered calls as hedging instruments and records gains or loss on the covered call in the period of the change. During the three and nine months ended September 30, 2017, Solitario sold covered calls for cash proceeds of $12,000 and $55,000, respectively.

Solitario recorded the following gain (loss) on derivative instruments:

The following table provides the location and amount of the fair values of Solitario's derivative instruments presented in the consolidated balance sheets as of September 30, 2017 and December 31, 2016:

6.        Fair Value

For certain of Solitario’s financial instruments, including cash and cash equivalents short-term investments and payables, the carrying amounts approximate fair value due to their short termshort-term maturities. Solitario’s short-term investments in CDs and USTS, Kinross calls and marketable equity securities are carried at their estimated fair value primarily based on quoted market prices. The Vendetta Warrants are carried at their estimated fair value at December 31, 2016 of $735,000; based upon a Black-Scholes valuation model, see Note 4, “Other Assets,” above.

Solitario accounts for its financial instruments under ASC 820. ASC 820 establishes a framework for measuring fair value and requires enhanced disclosures about fair value measurements. ASC 820 clarifies that fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. ASC 820 also requires disclosure about how fair value is determined for assets and liabilities and establishes a hierarchy for which these assets and liabilities must be grouped, based on significant levels of inputs as follows:

The determination of where assets and liabilities fall within this hierarchy is based upon the lowest level of input that is significant to the fair value measurement. During the three and nine months ended September 30, 2017March 31, 2018 there were no reclassifications in financial assets or liabilities between Level 1, 2 or 3 categories.

The following is a listing of Solitario’s financial assets and liabilities required to be measured at fair value on a recurring basis and where they are classified within the hierarchy as of September 30, 2017:March 31, 2018:

The following is a listing of Solitario’s financial assets and liabilities required to be measured at fair value on a recurring basis and where they are classified within the hierarchy as of December 31, 2016:2017:

7.        Income Taxes

Solitario accounts for income taxes in accordance with ASC 740. Under ASC 740, income taxes are provided for the tax effects of transactions reported in the financial statements and consist of taxes currently due plus deferred taxes related to certain income and expenses recognized in different periods for financial and income tax reporting purposes. Deferred tax assets and liabilities represent the future tax return consequences of those differences, which will either be taxable or deductible when the assets and liabilities are recovered or settled. Deferred taxes are also recognized for operating losses and tax credits that are available to offset future taxable income and income taxes, respectively. A valuation allowance is provided if it is more likely than not that some portion or all of the deferred tax assets will not be realized.

At September 30, 2017March 31, 2018 and December 31, 2016, Solitario2017, a valuation allowance has been recorded, nowhich fully offsets Solitario’s net deferred tax assets. A valuation allowance, which fully offsets the net deferred tax assets, has been recorded because it is more likely than not that the Company will not realize some portion or all of its deferred tax assets.  The Company continually assesses both positive and negative evidence to determine whether it is more likely than not that the deferred tax assets can be realized prior to their expiration.

During the three and nine months ended September 30,March 31, 2018 and 2017, Solitario recorded no deferred tax expense of $74,000 and a deferred income tax benefit of $15,000, respectively, in the statement of operations and recorded a deferred tax benefit of $74,000, and a deferred tax expense of $15,000 to other comprehensive income related to realized and unrealized gains and losses on marketable equity securities in other comprehensive income. During the three and nine months ended September 30, 2016, Solitario recorded deferred tax benefits of $27,000 and $264,000, respectively, in the statement of operations and recorded a deferred tax expense of the same amount to other comprehensive income related to realized and unrealized gains on marketable equity securities in other comprehensive income.expense.

8.       Employee Stock Compensation Plans

The 2006 Plan

On June 27, 2006, Solitario’s shareholders approved the 2006 Stock Option Incentive Plan (the “2006 Plan”). On June 27, 2016, the 2006 Plan terminated and as of that date no additional options may be granted pursuant to the 2006 Plan. During the nine months ended September 30, 2016, Solitario granted options to acquire 350,000 shares of common stock under the 2006 Plan. These options were subsequently surrendered by the holders and cancelled on August 24, 2016. As a result of the cancellation Solitario recognized $84,000 of unamortized grant date fair value as of the date of the cancellation under the 2006 Plan. No options were exercised during the three and nine months ended September 30, 2017 and 2016 under the 2006 Plan.

The 2013 Plan

On June 18, 2013, Solitario’s shareholders approved the 2013 Solitario Exploration & Royalty Corp. Omnibus Stock and Incentive Plan (the “2013 Plan”). Under the terms of the 2013 Plan, a total of 1,750,000 shares of Solitario common stock were reserved for awards to directors, officers, employees and consultants. On June 29, 2017, Solitario shareholders approved an amendment to the 2013 Plan, which increased the number of shares available of common stock available for issuance under the 2013 Plan from 1,750,000 to 5,750,000. Under the terms ofAwards granted under the 2013 Plan the Board of Directors may grant awards to directors, officers, employees and consultants. Such awards may take the form of stock options, stock appreciation rights, restricted stock, and restricted stock units. The terms and conditions of the awards are pursuant to the 2013 Plan and are granted by the Board of Directors or a committee appointed by the Board of Directors.

InAs of March 31, 2018, and December 31, 2017 there were options outstanding that are exercisable to acquire 2,082,428 and 1,928,428 shares of Solitario common stock, respectively. These options have exercise prices between $0.54 per share and $1.74 per share. Of these, 1,728,428 shares were Replacement Options granted in connection with the Acquisition, on July 12, 2017,Acquisition. During the three months ended March 31, 2018, Solitario granted 1,782,428 Replacement Options. The Replacement Options were priced between $2.24 per share and $0.70 per shareoptions exercisable into 100,000 shares to a consultant, with terms between 10 months and 18 months. In accordance with the terms of the Acquisition, the Replacement Options were fully vested upon grant. The Replacement Options had a grant date fair value of $164,000, based upon Black-Scholes models with an expected volatility of 67% and a risk-free interest rate of 1.00%. The grant date fair value was capitalized as part of the purchase price of the Zazu assets acquired in the Acquisition. See Note 1, “Recent developments” above.

On September 1, 2017, the Board of Directors granted 200,000 stock options under the 2013 Plan. The options have a five-year life, vested 25% on the date of grant and vest 25% on each of the next three anniversary dates of the date of grant, and have an exercise price of $0.77$0.62 per share, a term of seven months and a grant date fair value of $84,000,$12,000 based upon a Black-Scholes model with a an expected66% volatility of 64%, and a risk free1% risk-free interest raterate. There were no stock grants during the three months ended March 31, 2017. There were no exercises of 1.70%.options under the 2013 Plan during the three months ended March 31, 2018 and 2017. During the three and nine months ended September 30, 2017,March 31, 2018, Solitario recorded stock option compensation related to theseexpense of $10,000. Solitario had no stock options of $23,000.outstanding and recorded no stock option compensation expense during the three months ended March 31, 2017.

On September 1, 2017, the Board of Directors granted, subject to shareholder approval at the next meeting of shareholders, an additional 2,300,000 stock options under the 2013 Plan to officers and members of the Boardboard of Directors. These optionsdirectors (the “Conditional Options”). The Conditional Options have a five-year life, and exercise price of $0.77 per share, and a grant date fair value of $970,0000,$970,000, based upon a Black-Scholes model with a volatility of 64%, and a risk freerisk-free interest rate of 1.70%. AlthoughIf approved, the optionsConditional Options will vest on the schedule of 25% on date of grant and 25% on each of the next three anniversary dates of the date of grant, the optionsgrant. The Conditional Options are not deemed outstanding and will not become exercisable in whole or in part unless Solitario shareholders approve the grants, and the option grants will be void if Solitario shareholders do not approve the grants. Solitario will not record any stock option expense related to these options unless and until the shareholder approval is received.

On July 28, 2016, the Board of Directors granted 1,699,000 stock options under the 2013 Plan. These options were subsequently surrendered by the holders and cancelled on August 24, 2016. As a result of the cancellation, Solitario recognized $637,000 of unamortized grant date fair value as of the date of the cancellation under the 2013 Plan. There were no exercises of options or awards under the 2013 Plan during the three and nine months ended September 30, 2017 or 2016.

9.        Shareholders’ Equity and Accumulated Other Comprehensive Income

Solitario adopted ASU No. 2016-01 in the first quarter of 2018. Solitario recorded a cumulative-effect adjustment for the change in accounting principle to retained earnings of $576,000 related to the adoption of ASU 2016-01. In addition, Solitario eliminated its previously recorded gain on sale of marketable equity securities of $221,000 in its consolidated statement of operations for the three months ended March 31, 2017 resulting in an adjusted unrealized gain on marketable equity securities of $128,000 for the three months ended March 31, 2017 as a result of the adoption of ASU 2016-01. These changes increased the net loss for the three months ended March 31, 2017 from $13,000 to $106,000. These changes as a result of the adoption of ASU 2016-01 were similarly reflected in the adjustment to net income for marketable equity securities in the statement of cash flows for the three months ended March 31, 2017.

Share Repurchase Program

On October 28, 2015, Solitario’s Board of Directors approved a share repurchase program that initially authorized Solitario to purchase up to two million shares of its outstanding common stock. On November 7,During 2017, Solitario’s Board of Directors extended the expiration date of the share repurchase program through December 31, 2018. During the ninethree months ended September 30,March 31, 2018 and 2017, Solitario purchased 38,700 shares of Solitario common stock for an aggregate purchase price of $28,000. During the three52,614 and nine months ended September 30, 2016, Solitario purchased 18,000 and 424,0008,400 shares of Solitario common stock, respectively, for an aggregate purchase price of $13,000$26,000 and $214,000,$6,000, respectively. As of September 30, 2017,March 31, 2018, Solitario has purchased a total of 659,300720,414 shares for an aggregate purchase price of $343,000$374,000 under the share repurchase program since its inception.

10.       Subsequent Event

On April 27, 2018 Solitario, through its wholly-owned subsidiary, Minera Solitario Peru, S.A.C., sold its non-producing Yanacocha royalty to Minera Los Topados S.A., a wholly-owned subsidiary of Newmont Mining Corporation for $502,000 in cash.

Item 2.   Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion should be read in conjunction with the information contained in the consolidated financial statements of Solitario for the years ended December 31, 20162017 and 2015,2016, and Management’s Discussion and Analysis of Financial Condition and Results of Operations contained in Solitario’s Annual Report on Form 10-K for the year ended December 31, 2016.2017. Solitario's financial condition and results of operations are not necessarily indicative of what may be expected in future periods. Unless otherwise indicated, all references to dollars are to U.S. dollars.

(a) Recent Developments

As further described in Note 1 “Business and Significant Accounting Policies,” “Recent developments,” on July 12, 2017 we completed the acquisition of Zazu pursuant to the Arrangement Agreementand acquired all of the Zazu Shares by way of the Arrangement. As a result of the Acquisition Zazu became a wholly-owned subsidiary of Solitario. At closing, we issued 19,788,177 shares of common stock for all of the issued and outstandingZazu Shares. We also grantedtheReplacement Options in connection with the Acquisition. The Acquisition was recorded during the three and nine months ended September 30, 2017 as the acquisition of assets in accordance with ASU 2017-01. The total purchase pricefor the Acquisition was $16,227,000 and has been allocated to the assets acquired, less liabilities.Results of operations for Zazu have been included in our consolidated financial statements from the date of Acquisition.

Effective July 17, 2017 an amendment to our Articles of Incorporation became effective that served to change our name to “Solitario Zinc Corp.” from “Solitario Exploration & Royalty Corp.” Subsequent to the Acquisition, our core mineral property assets are the 39% interest in the Florida Canyon zinc project in Peru and the 50% ownership interest in the Lik zinc deposit (acquired in the Acquisition). We believe the name “Solitario Zinc Corp.” reflects the increased focus of the Company on zinc-related assets.

(b) Business Overview and Summary

We are an exploration stage company under Industry Guide 7, as issued by the SEC with a focus of the acquisition of precious and base metal properties with exploration potential and the development or purchase of royalty interests. Upon the completion of the Acquisition, we have shifted our focus toward the acquisition and exploration of zinc-related exploration mineral properties. However, we will continue to evaluate other mineral properties for acquisition and hold a portfolio of mineral exploration properties and assets for future sale, joint venture or to create a royalty prior to the establishment of proven and probable reserves. Although our mineral properties may be developed in the future by us, through a joint venture or by a third party, we have never developed a mineral property. In addition to focusing on our current assetsmineral exploration properties and the evaluation of mineral properties for acquisition or purchase of royalty interests, we also evaluate potential strategic corporate transactions for the acquisition of new precious and base metal properties and assets with exploration potential.

We have recorded revenue in the past from the sale of mineral properties, including the sale of MH-LLC during 2015, joint venture property payments and the sale of a royalty on our former Mt. Hamilton property. Proceeds from the sale or joint venture of our properties, although significant, have not historically been a consistent annual source of cash or revenue and would occur, if at all, on an infrequent basis in the future. We have reduced our exposure to the costs of our exploration activities in the past through the use of joint ventures. Although we anticipate the use of joint venture funding for some of our exploration activities will continue for the foreseeable future, we can provide no assurance that these or other sources of capital will be available in sufficient amounts to meet our needs, if at all.

We currently consider our carried interest in our Florida Canyon project in Peru and our recently acquired interest in the Lik project in Alaska to be our core mineral property assets. We expect our joint venture partner will continue the exploration development and furtherance of the Florida Canyon project and we will monitor progress at Florida Canyon. We are currently evaluating potentialplanning a joint 2018 exploration and development plans forprogram at the Lik project.project with Teck, our 50% partner at Lik. In addition, at March 31, 2018, we have one exploration property in Peru, and one royalty property in each of Peru, Brazil, United States and Mexico. We are conducting independent exploration activities in Peru and through joint ventures operated by our partners in Peru and the United States. We conduct potential acquisition evaluations in other countries of both South and North America.

As of September 30, 2017,March 31, 2018, we have significant balances of cash and short-term investments that we anticipate using, in part, to further the development of the Lik project and to potentially acquire additional mineral property assets. The fluctuations in precious metal and other commodity prices has contributedcontribute to a challenging environment for mineral exploration and development, which has created opportunities as well as challenges for the potential acquisition of advanced mineral exploration projects or other related assets at potentially attractive terms.

(c)(b) Results of Operations

Comparison of the quarter ended September 30, 2017March 31, 2018 to the quarter ended September 30, 2016March 31, 2017

We had a net incomeloss of $77,000$1,004,000 or approximately$0.02 per basic and diluted share for the three months ended March 31, 2018 compared to a net loss of $106,000 or $0.00 per basic and diluted share for the three months ended September 30, 2017, compared to a net loss of $1,119,000 or approximately $0.03 per basic and diluted share for the three months ended September 30, 2016.March 31, 2017. As explained in more detail below, the primary reasonreasons for the change toincrease in the net income forloss in the three months ended September 30, 2017 from a netMarch 31, 2018 compared to the loss forin the first three months ended September 30, 2016 wasof 2017 were (i) recording a credit during the 2017 period to general and administrative expense for certain Acquisition related costs, previously expensed, which were capitalized to the purchase price of the Acquisition upon the adoption of ASU 2017- 01; (ii) a decrease in non-cash stock option compensation expense, includedan increase in general and administrative expenses to $23,000$403,000 during the three months ended September 30, 2017March 31, 2018 compared to $939,000, which included expenses related to the cancellationgeneral and administrative costs of options of $721,000$300,000 during the three months ended September 30, 2016; (iii) an increase in interest income to $38,000March 31, 2017; (ii) the recording of a non-cash loss on unrealized loss on marketable equity securities of $441,000 during the three months ended September 30, 2017March 31, 2018 compared to a non-cash unrealized gain on marketable equity securities of $128,000 during the three months ended March 31, 2017; (iii) a decrease in interest income to $26,000 during the three months ended March 31, 2018 compared to interest income of $27,000$46,000 during the three months ended September 30, 2016; andMarch 31, 2017; (iv) an increase in gain on sale of marketable equity securities to $357,000 during the three months ended September 30, 2017 compared to gain on sale of marketable equity securities of $10,000 during the three months ended September 30, 2016. These were partially offset by an (i) increase in exploration expense to $180,000 during the three months ended September 30, 2017March 31, 2018 compared to exploration expense of $132,000$151,000 during the three months ended September 30, 2016; (ii)March 31, 2017; and (v) a reduction in the gain on derivative instruments to a loss of $18,000$172,000 during the three months ended September 30,March 31, 2017 compared to a gain of $163,000with no similar item during the three months ended September 30, 2016; and (iii) income tax expenseMarch 31, 2018. Each of $74,000 during the three months ended September 30, 2017 compared to and income tax benefitmajor components of $27,000 during the three months ended September 30, 2016. The significant changes for these items areis discussed in more detail below.

          Our net exploration expense increased to $180,000 during the three months ended September 30, 2017March 31, 2018 compared to exploration expense of $132,000$151,000 during the three months ended September 30, 2016.March 31, 2018. We increased our reconnaissance exploration activities duringprimarily related to the evaluation of mineral properties and / or entities for potential acquisition or other strategic transactions. In addition, we increased our reconnaissance exploration activities in Peru for the same purpose. During the three months ended September 30, 2017 primarilyMarch 31, 2018 we had three contract geologists in Peru, and our Denver personnel spent a majority of their time on reconnaissance exploration activities described above and related to the completion of a preliminary economic assessment on our Florida Canyon project (the Florida Canyon PEA”). The Florida Canyon PEA was completed by SRK Consulting (U.S.), Inc., an independent and internationally recognized mining engineering firm, and reported during the third quarter of 2017. In addition, we continued to evaluate exploration properties and /or companies for potential acquisitions or other strategic transactions.matters. We anticipate we will continue with our current exploration activities, including evaluation ofand, in addition, we have budgeted additional exploration expenditures related to our newly-acquired Lik project in Alaska and asour Florida Canyon project, and to the extent we acquire any new exploration projects, to expand those activities further. As a result, we expect our full-year exploration expenditures for 2017 will2018 to exceed the expenditures for full-year 2016.2017.

Exploration expense (in thousands) by project for the three and nine months ended September 30, 2016March 31, 2018 and 20152017 consisted of the following:

General and administrative costs, excluding stock option compensation costs, discussed below, were $17,000$403,000 during the three months ended September 30, 2016March 31, 2018 compared to $274,000$300,000 during the three months ended September 30, 2016.March 31, 2017. The major components of these costs were related to (i) salaries and benefit expense of $157,000 during the first three months of 2018 compared to salary and benefit costs of $158,000 during the three months ended September 30, 2017 of $162,000 compared to salaries and benefits expense of $150,000 in the same period of 2016;March 31, 2017; (ii) a net credit of $224,000 to legal and accounting related to previously expensed Acquisition expenditures which were capitalized as part of the Acquisition purchase price upon the adoption of ASU 2017-10$41,000 in the first three months ended September 30, 2017, see Note 1 to the condensed consolidated statements “Recent developments,” above,of 2018 compared to $67,000$29,000 in the first three months ended September 30, 2016;of 2017; (iii) office rent and expenses of $24,000$41,000 during the three months ended September 30, 2017March 31, 2018, compared to $23,000$43,000 during the three months ended September 30, 2016;March 31, 2017; and (iv)Directors and officer liability insurance charged to operations of $14,000 during the three months ended September 30, 2017, with no similar item during the same period of 2016 and (v) travel and shareholder relation costs of $39,000$153,000 during the first three months of 2018, which included additional stock exchange fees compared to 2017 due to our additional outstanding shares, and additional investor relations costs during the three months ended September 30, 2017March 31, 2018 incurred for investor presentations and providing investors with information regarding the Acquisition, compared to $32,000$71,000 during the first three months ended September 30, 2016.of 2017. We anticipate the non-stock option compensation and non-Acquisition general and administrative costs will be incurred at a comparable rate to the rate in the three months ended September 30, 2017quarterly amounts for the remainder of 2017.2018.

We recorded $10,000 of stock option expense for the amortization of unvested grant date fair value with a credit to additional paid-in-capital of $23,000 during the three months ended September 30, 2017 compared to $218,000March 31, 2018, with no comparable stock option expense during the three months ended September 30, 2016. DuringMarch 31, 2017 as we had granted no options and had no options outstanding during the three months ended September 30, 2016, the holders of options to acquire our common stock voluntarily surrendered for cancellation all options previously granted to such persons and we cancelled the options upon surrender. Upon cancellation, weMarch 31, 2017.

We recorded an additional $721,000unrealized loss on marketable equity securities of non-cash stock option compensation expense for the unamortized grant date fair value as of the date of cancellation. See Note 9, “Employee Stock Compensation Plans,” to the condensed consolidated financial statements, above.

During$441,000 during the three months ended September 30, 2017 we soldMarch 31, 2018 compared to an unrealized gain on marketable equity securities for proceeds of $407,000 and$128,000 during the three months ended March 31, 2017. The loss during the three months ended March 31, 2018 was primarily related to a decrease in the value of our holdings of 11,000,000 shares of Vendetta common stock which decreased from a fair value of $2,190,000 at December 31, 2017 to a fair value of $1,792,000 at March 31, 2018 based on quoted market prices. We adopted ASU No. 2016-01 in the first quarter of 2018. We recorded a cumulative-effect adjustment for the change in accounting principle to retained earnings of $576,000 related to the adoption of ASU 2016-01. In addition, we eliminated our previously recorded gain on the sales of $357,000, compared to salessale of marketable equity security sales for proceedssecurities of $16,000 and a recorded gain on the sales$221,000 in our consolidated statement of $10,000operations for the three months ended September 30, 2016. DuringMarch 31, 2017 resulting in an adjusted unrealized gain on marketable equity securities of $128,000 for the three months ended September 30,March 31, 2017 we sold 2,000,000as a result of the adoption of ASU 2016-01. These changes increased the net loss for the three months ended March 31, 2017 from $13,000 to $106,000. See Note 9, “Shareholders’ Equity and Other Comprehensive Income” in the unaudited consolidated financial statements, above.

We recorded a gain on derivative instruments of $172,000, during the three months ended March 31, 2017, with no similar item during the three months ended March 31, 2018. The gain during the three months ended March 31, 2017 was related to a $148,000 gain on our Vendetta Warrants primarily as a result of an increase in the price of Vendetta common shares and usedas quoted on the bulk of the proceeds of $407,000 to exercise 5,000,000 Vendetta Warrants for $411,000. See Note 3, “Marketable Equity Securities,” above. The sale of marketable equity securities during 2016 consisted of the sale of 3,000 shares of Kinross common stock. We anticipate we will continue to sell some of our holdings of marketable equity securitiesTSX Venture Exchange during the remainder ofthree months ended March 31, 2017, related to our overall cash management strategy.

We adjustwhich positively affected the fair value of the Vendetta Warrants at each balance sheet date, based upon a Black-Scholes model. During the three months ended September 30, 2017 we recorded a loss on derivative instruments of $31,000 related to the Vendetta Warrants, compared to a gain on derivative instruments of $91,000In addition, during the three months ended September 30, 2016. During the three months ended September 30,March 31, 2017 we recorded a gain on derivative instruments related to ourthe change in value of Kinross covered calls of $13,000 compared to a gain on derivative instruments$25,000 during the three months ended September 30,March 31, 2017 related to changes in the value of $72,000. UponKinross calls owned during the exercise of the Vendetta Warrants discussed above, we no longer have any Vendetta Warrants as of September 30, 2017,three months ended March 31, 2017. We do not manage or control our derivative instruments for gain or loss and generally do not anticipate significant income or loss as a result do not expect to record significant swingsof changes in our gain or loss onthe value of derivative instruments during the remainder of 2017.

We recorded a deferred tax expense of $74,000 and a deferred tax benefit of $15,000, respectively, during the three and nine months ended September 30, 2017 related to the gains and losses and related valuation allowance related to gains and losses in other comprehensive income during 2017. During the three and nine months ended September 30, 2016, we recorded deferred tax benefits of $27,000 and $264,000, respectively, related to changes in other comprehensive income in the three and nine months ended September 30, 2016. As a result of our exploration activities and other tax deductible expenses, we anticipate we will not have currently payable income taxes during 2017. We provide a valuation allowance for our United States and foreign net operating losses, which are primarily related to our general and administrative expenses and our exploration activities in Peru, respectively. We anticipate we will continue to provide a valuation allowance for these net operating losses until we are in a net tax liability position with regards to those countries where we operate or until it is more likely than not that we will be able to realize those net operating losses in the future.

Comparison of the nine months ended September 30, 2017 to the nine months ended September 30, 2016

We had a net loss of $453,000 or $0.01 per basic and diluted shared for the nine months ended September 30, 2017 compared to a net loss of 1,770,000 or $0.05 per basic and diluted share for the nine months ended September 30, 2016. As explained in more detail below, the primary reasons for the decrease in the net loss during the nine months ended September 30, 2017 compared to the net loss during the nine months ended September 30, 2016 were (i) a decrease in non-cash stock option compensation expense, included in general and administrative expenses to $23,000 during the nine months ended September 30, 2017 compared to $939,000, which included expenses related to the cancellation of options, discussed above, of $721,000 during the nine months ended September 30, 2016; (ii) we recorded interest income of $114,000 during the nine months ended September 30, 2017 compared to interest income of $40,000 as a result of increased interest rate on our outstanding short-term investments during 2017 compared to 2016; (iii) an increase in gain on sale of marketable equity securities to $578,000 during the nine months ended September 30, 207 compared to gain on sale of marketable equity securities of $40,000 during the nine months ended September 30, 2016; and (iv) we recorded a loss on the sale of other assets of $14,000 during the nine months ended September 30, 2016 related to the closure of our Mexico exploration office, with no similar item during 2017. These reductions in net loss were partially offset by (i) an increase in exploration expense to $519,000 during the nine months ended September 30, 2017 compared to exploration expense of $474,000 during the nine months ended September 30, 2016; (ii) depreciation expense increased to $8,000 during the nine months ended September 30, 2017 compared to $4,000 during the same period in 2016 as a result of the addition of $100,000 of exploration equipment at Lik during 2017; (iii) we recorded a reduction in the gain on derivative instruments to $267,000 during the nine months ended September 30, 2017 compared to a gain on derivative instruments of $295,000 during the nine months ended September 30, 2016; and (iv) we recorded a deferred tax benefit of $15,000 during the nine months ended September 30, 2017 related to changes in other comprehensive income compared to deferred tax benefit of $27,000 during the nine months ended September 30, 2016, as discussed above.

Our net exploration expense increased to $519,000 during the nine months ended September 30, 2017 compared to $474,000 in the comparable period of 2016. See the discussion of the comparison of the three months ended September 30, 2017 compared to the three months ended September 30, 2016, above with the major increase in the nine month period of 2017 related to the Florida Canyon PEA and an increase in reconnaissance exploration.

General and administrative costs, excluding stock option compensation costs discussed below, were $877,000 during the nine months ended September 30, 2017 compared to $941,000 in the same period of 2016. The major components of the costs were (i) salaries and benefit expense during the nine months ended September 30, 2017 of $477,000 compared to salaries and benefit expense of $631,000 in the same period of 2016, which included a bonus of $152,000 during 2016 with no similar item during the nine months ended September 30, 2017; (ii) legal and accounting expenditures of $109,000 in the nine months ended September 30, 2017 compared to $90,000 in the same period of 2016; (iii) other costs of $75,000 during the nine months ended September 30, 2017 compared to $66,000 in the same period of 2016; and (iv) travel and shareholder relation costs of $175,000 during the nine months ended September 30, 2017 compared to $154,000 in the same period of 2015.

During the nine months ended September 30, 2016, we recorded $970,000 of non-cash stock option expense with a credit to additional paid-in capital for the amortization of unvested grant date fair value, including $721,000 of non-cash stock option expense of unamortized grant date fair value upon the cancellation of options, compared to $23,000 of non-cash stock option expense during the nine months ended September 30, 2017. See Note 9, “Employee Stock Compensation Plans,” above for a further discussion of our stock option activity during the nine months ended September 30, 2016.

During the nine months ended September 30, 2017 we sold marketable equity securities for proceeds of $666,000 and recorded a gain on the sales of $578,000, compared to sales of marketable equity security sales for proceeds of $56,000 and a recorded gain on the sales of $40,000 for the nine months ended September 30, 2016. During the nine months ended September 30, 2017 we sold 3,480,000 Vendetta common shares, and used the bulk of the proceeds of $666,000 to exercise 7,240,000 Vendetta Warrants for $578,000. See Note 3, “Marketable Equity Securities,” above. The sale of marketable equity securities during 2016 consisted of the sale of 3,000 shares of Kinross common stock and the sale of 100,000 shares of International Lithium Corp stock. During the nine months ended September 30, 2016, the proceeds from these sales were $56,000 and we recorded a gain on sale of $40,000 on the sale of these securities.2018.

We regularly perform evaluations of our mineral property assets to assess the recoverability of our investments in these assets. All long-lived assets are reviewed for impairment whenever events or circumstances change which indicate the carrying amount of an asset may not be recoverable utilizing guidelines based upon future net cash flows from the asset as well as our estimates of the geological potential of an early stage mineral property and its related value for future sale, joint venture or development by us or others. During the ninethree months ended September 30, 2016March 31, 2018 and 2017, we recorded no property impairments.

At March 31, 2018 and 2017, our net operating loss carry-forwards exceed our built-in gains on marketable equity securities resulting in a loss on other assets of $14,000 and property abandonmentnet tax asset position for which we provide a valuation allowance for all net deferred tax assets. We recorded no income tax expense of $10,000 related toor benefit during the closurethree months ended March 31, 2018 or 2017. As a result of our exploration officeactivities, we anticipate we will not have currently payable income taxes during 2018. In addition to the valuation allowance discussed above, we provide a valuation allowance for our foreign net operating losses, which are primarily related to our exploration activities in Mexico.Peru. We recorded no mineral property write-downs duringanticipate we will continue to provide a valuation allowance for these net operating losses until we are in a net tax liability position with regards to those countries where we operate or until it is more likely than not that we will be able to realize those net operating losses in the nine months ended September 30, 2017.future.

(d)(c) Liquidity and Capital Resources

Cash and Short-term Investments

As of September 30, 2017,March 31, 2018, we have $12,232,000$11,320,000 in cash and short-term investments. As of September 30, 2017,March 31, 2018, we have invested $10,723,000$9,976,000 of our current assets in USTS with maturities of 15 days to 1921 months. The USTS are recorded at their fair value, based upon quoted market prices. As of September 30, 2017,March 31, 2018, we have invested $1,248,000$1,247,000 in separate CDs with maximum values of $250,000, each of which is covered by FDIC insurance to the full facefull-face value of the CDs. At September 30,March 31, 2017, the CDs have maturities of between 30 days4 and 1815 months. The CDs are recorded at their fair value, based upon quoted market prices. We anticipate we will roll over that portion of our USTS and CDs not used for exploration expenditures, operating costs or mineral property acquisitions as they become due during the remainder of 2017.2018.

We intend to utilize a portion of our cash and short-term investments in our exploration activities and the potential acquisition of mineral assets over the next several years. We also expect to use a portion of our cash to repurchase shares of our common stock pursuant to the terms of a stock buy-back program announced on October 28, 2015, and discussed above in Note 9, “Shareholders’ Equity and Accumulated Other Comprehensive Income” to the unaudited condensed consolidated financial statements. The stock buy-back program may be terminated at any time and does not require Solitario to purchase a minimum number of shares.

Loan to Zazu

On April 26, 2017, concurrent with the signing of the Arrangement Agreement, we provided Zazu interim debt financing in the principal amount of US$1,500,000 through the issuance of the "Debenture. The Debenture was secured by way of a general security and pledge agreement on Zazu assets and bore interest at a rate of 5% per annum. The Debenture was convertible, at our option into Zazu Shares at a price of US$0.22 per Zazu Share. Upon completion of the Acquisition, the Debenture was cancelled. See Note 1, to the unaudited consolidated financial statements, “Recent developments,” above.

Investment in Marketable Equity Securities

Our marketable equity securities are classified as available-for-sale and are carried at fair value, which is based upon market quotes of the underlying securities. We ownedAt March 31, 2018 we own 11,000,000 shares of Vendetta common stock and 100,000 shares of Kinross common stockstock. The Vendetta shares are recorded at September 30, 2017. Thetheir fair market value of $1,792,000 and the Kinross shares are recorded at their fair value of $437,000$395,000 at September 30, 2017. On May 2, 2016March 31, 2018. In addition, we purchased 7,240,000 unitsown other marketable equity securities with a fair market value of Vendetta for an aggregate purchase price$15,000 at March 31, 2018. We did not sell any of $289,000. Each unit consists of one common share of Vendetta and one Vendetta Warrant forour marketable equity securities during the purchase of one common share of Vendetta at Cdn$0.10 per share for a period of two years.three months ended March 31, 2018. During the ninethree months ended September 30,March 31, 2017, we sold 3,480,0001,480,000 common shares of Vendetta for proceeds of $666,000, and recorded a gain on the sale of marketable equity securities of $577,000.$259,000. During the ninethree months ended September 30,March 31, 2017 we exercised 7,240,0002,240,000 of ourthe Vendetta Warrants we held and received 7,240,0002,240,000 Vendetta common shares, by paying $574,000 cash$167,000 (Cdn$224,000) to Vendetta. The recorded cost of the shares received from the exercise of the Vendetta Warrants was recorded based upon the total of the (i) exercise price of the Vendetta Warrants exercised, $578,000,$167,000, and (ii) the fair value of the Vendetta Warrants on the date of exercise, which equaled their intrinsic value, $950,000,$309,000, for a total value of $1,528,000. As of September 30, 2017, we own 11,000,000 common shares of Vendetta, which are carried at their fair value of $2,382,000 based upon quoted market prices, with any unrealized gain or loss included in other comprehensive income. In addition we own other marketable equity securities with a fair value of $13,000 as of September 30, 2017.$476,000.

Working Capital

We had working capital of $15,094,000$13,450,000 at September 30, 2017March 31, 2018 compared to working capital of $16,671,000$14,499,000 as of December 31, 2016.2017. Our working capital at September 30, 2017March 31, 2018 consists primarily of our cash and cash equivalents, our investment in USTS and CDs, discussed above, and our investment in marketable equity securities of $2,819,000,$2,202,000, less our accounts payable of $141,000.$165,000. As of September 30, 2017,March 31, 2018, our cash balances along with our short-term investments and marketable equity securities are adequate to fund our expected expenditures over the next year.

The nature of the mineral exploration business requires significant sources of capital to fund exploration,

development and operation of mining projects. We will need additional capital if we decide to develop or operate any of our current exploration projects or any projects or assets we may acquire. We anticipate we would finance any such development through the use of our cash reserves, short-term investments, joint ventures, issuance of debt or equity, securities, or the sale of other exploration projects or assets.

Stock-Based Compensation Plans

InAs of March 31, 2018, and December 31, 2017 there were options outstanding that are exercisable to acquire 2,082,428 and 1,928,428 shares of Solitario common stock, respectively, with exercise prices between $0.54 per share and $1.74 per share. Of these, 1,728,428 shares were Replacement Options granted in connection with the Acquisition, on July 12, 2017, we granted 1,782,428 Replacement Options. The Replacement Options were priced between $2.24 per share and $0.70 per share with terms between 10 months and 18 months. In accordance with the terms of the Acquisition, the Replacement Options were fully vested upon grant. The Replacement Options had a grant date fair value of $164,000, based upon Black-Scholes models with an expected volatility of 67% and a risk-free interest rate of 1.00%. The grant date fair value was capitalized as part of the purchase price of the Zazu assets acquired in the Acquisition.

On September 1, 2017, we granted 200,000 stock options under the 2013 Plan. The options have a five-year life, vested 25% on the date of grant and vest 25% on each of the next three anniversary dates of the date of grant, and have an exercise price of $0.77 per share, and a grant date fair value of $84,000, based upon a Black-Scholes model with a an expected volatility of 64%, and a risk free interest rate of 1.70%. During the three and nine months ended September 30, 2017, we recorded stock option compensation related to these options of $23,000.

On September 1, 2017, we granted, subject to shareholder approval at the next meeting of our shareholders, an additional 2,300,000 stock options under the 2013 Plan to officers and members of the Board of Directors. These options have a five-year life, and exercise price of $0.77 per share, and a grant date fair value of $970,0000, based upon a Black-Scholes model with a volatility of 64%, and a risk free interest rate of 1.70%. Although the options will vest on the schedule of 25% on date of grant and 25% on each of the next three anniversary dates of the date of grant, the options will not become exercisable in whole or in part unless our shareholders approve the grants, and the option grants will be void if our shareholders do not approve the grants. We will not record any stock option expense related to these options until the shareholder approval is received.

During the nine months ended September 30, 2016 the holders of options to acquire our common stock voluntarily surrendered for cancellation all options previously granted to such persons pursuant to the 2013 Plan and the 2006 Plan. Solitario cancelled the options upon surrender. As a result, there are no outstanding options under the 2006 Plan. See Note 8, “Employee Stock Compensation Plans,” above for a discussion of the activity in our 2013 Plan and our 2006 Plan during 2017. We do not anticipate the exercise of options during the remainder of 2017 will be a significant source of cash.2018.

Share Repurchase Program

On October 28, 2015, our Board of Directors approved a share repurchase program that authorized us to purchase up to two million shares of our outstanding common stock. On November 7,During 2017, our Board of Directors extended the term of the share repurchase program until December 31, 2018. All shares purchased to date have been cancelled and reduced the number of shares of outstanding common stock. The amount and timing of any shares purchased has been and will be determined by our management and the purchases will be effected in the open market or in privately negotiated transactions based upon market conditions and other factors, including price, regulatory requirements and capital availability and in compliance with applicable state and federal securities laws. Purchases may also be made in accordance with Rule 10b-18 of the Securities Exchange Act of 1934, as amended (the “1934 Act”). The repurchase program does not require the purchase of any minimum number of shares of common stock by the Company, and may be suspended, modified or discontinued at any time without prior notice. No purchases will be made outside of the United States, including on the Toronto Stock Exchange.TSX. Payments for shares of common stock repurchased under the program have been funded using the Company’s working capital. As of September 30, 2017, since the inception of the share repurchase program, we haveMarch 31, 2018, Solitario has purchased a total of 659,300720,414 shares for an aggregate purchase price of $343,000$374,000 under the share repurchase program since its inception and these shares are no longer included in our issued and outstanding shares. We anticipate we will continue to purchase a limited number of shares under the share repurchase plan during the remainder 20172018 as determined by management.

(e)(d) Cash Flows

Net cash used in operations during the ninethree months ended September 30, 2017 decreasedMarch 31, 2018 increased to $1,308,000$491,000 compared to $1,436,000$385,000 for the ninethree months ended September 30, 2016March 31, 2017 primarily as a result of a decrease(i) an increase in general and administrative expenses not relatedexpense to $403,000 during the Acquisition. Legal and accounting costs directly associated withthree months ended March 31, 2018 compared to $300,000 during the Acquisition were capitalized in accordance with ASUthree months ended March 31, 2017 – 01, as discussed above in Note 1 “Recent developments.” In addition, as we focused on the Acquisition, we spent less time and expense on other general and administrative matters, including shareholder and investor relations. These reductions were partially offset by a slight; (ii) an increase in exploration expense. Weexpenses to $180,000 during the three months ended March 31, 2018 compared to $151,000 during 2017; and (iii) a decrease in interest income during the three months ended March 31, 2018 to $26,000 compared to $46,000 during the three months ended March 31, 2017. Based upon projected expenditures in our 2018 budget, we anticipate our cash usedcontinued use of funds from operations will generally continue to be in line with the uses through the nine months ended September 30, 2017.remainder of 2018, primarily for exploration related to our Florida Canyon project, our Lik project and reconnaissance exploration. See “Results of Operations” discussed above for further explanation of some of these variances.

We received $1,478,000During the three months ended March 31, 2018, we provided $408,000 in cash from investing activities compared to the provision of $363,000 of cash from investing activities during the ninethree months ended September 30, 2017 primarilyMarch 31, 2017. The primary sources of cash related to (i) the net proceeds from short-term investment sales and purchases of $408,000 and $246,000, respectively, during 2018 and 2017; (iii) the sale of $3,254,000Vendetta shares for proceeds of short-term investments of USTS$259,000 during the three months ended March 31, 2017, with no similar sale during the three months ended March 31, 2018 and CDs. The(iv) the sale of these short-term investments was anticipated pursuant to our corporate budgets and plans forKinross calls of $25,000 during the three months ended March 31, 2017, after considerationwith no similar sale during the three months ended March 31, 2018. During the three months ended March 31, 2018 we purchased $8,000 of office equipment. During the expenditures for the Acquisition, and we anticipate we will continue to use short-term investments to fund our operations for the remainder of 2017. As part of the Acquisition,three months ended March 31, 2017 we used $1,500,000$167,000 of cash to extend the loan evidenced by the Debenture, discussed above, and we used net cash for the Acquisition of $417,000, consisting of $899,000 of transaction costs, $491,000 of acquired accounts payable less $974,000 of cash acquired. See Note 1, under “Recent developments,” above. We used $15,518,000 in cash from investing activities during the nine months ended September 30, 2016 for the net purchase of $7,018,000 of CDs and $8,500,000 of USTS, discussed above under “Short-term Investments” in “Liquidity and Capital Resources.” In addition, during 2016, we used $289,000 for the purchase of units ofthe Vendetta shares discussed above under “Liquidity and Capital Resources,” and we used $40,000 for the purchase of royalties on certain non-producing mineral leases in the state of Montana, previously owned by Atna Resources Ltd.above. We received $666,000 from the saledo not anticipate significant continued sales of marketable equity securities during the nine months ended September 30, 2017, from the saleremainder of Vendetta common shares, discussed above, compared2018, however we will continue to $40,000 from the saleliquidate a portion of marketable equity securitiesour investments in USTS and CDs as needed to fund our operations and or potential mineral property acquisitions during the nine months ended September 30, 2016. We anticipate the use of additional cash for potential exploration and evaluation activities related to our recently acquired interest in the Lik project as well as other on-going exploration activities for the remainder of 2017. We may incur additional costs related to the Acquisition or another2018. Any potential mineral property acquisition or purchasestrategic corporate investment during the remainder of 2018, discussed above under “Business Overview and Summary,” could involve a significant change in our cash provided or used for investing activities, depending on the structure of any additional exploration projects which we anticipate would be funded by the use of funds from the sale of our short-term investments.potential transaction.

We used $28,000$26,000 and $6,000, respectively, for the purchase of our common stock during the ninethree months ended September 30,March 31, 2018 and 2017, compared to the use of $214,000 during the nine months ended September 30, 2016, as discussed above discussed above under “Share Repurchase Program” in “Liquidity and Capital Resources.” We anticipate the use of funds for additional purchases of our common stock during the remainder of 2017. However,2018, however, this will be limited to the maximum number of shares, pursuantpermissible under to the share repurchase program.

(f)(e) Off-balance sheet arrangements

As of September 30, 2017March 31, 2018, and December 31, 20162017 we have no off-balance sheet obligations.

(g)(f) Development Activities, Exploration Activities, Environmental Compliance and Contractual Obligations

As of September 30, 2017 weWe are not involved in any development activities, nor do we have any contractual obligations related to theany potential development of any of our projectsactivities as of September 30, 2017.March 31, 2018. As of September 30, 2017,March 31, 2018, there have been no changes to our exploration activities, environmental compliance or other contractual obligations from those disclosed in our Management’s Discussion and Analysis included in our Annual Report on Form 10-K for the year ended December 31, 2016, except for the addition of our interest in the Lik project by virtue of the Acquisition, where we have estimated the asset retirement obligation at Lik for the reclamation of the existing exploration disturbance to be $125,000.2017.

(h)(g) Discontinued Projects

We dropped our royalty interests in the Aconchi and Norcan exploration properties in Mexico during the nine months ended September 30, 2017. There was no capitalized mineral property interest in either royalty of the interests and we did not record any mineral property write-downs during the ninethree months ended September 30,March 31, 2018 and 2017. During the nine months ended September 30, 2016, we closed our exploration office in Mexico. We recorded a mineral property write-down of $10,000 related to the Norcan and Aconchi properties during the nine months ended September 30, 2016. In addition, we recorded a loss on other assets in Mexico of $14,000 related to the exit from our exploration activities in Mexico during the nine months ended September 30, 2016.

(i)(h) Critical Accounting Estimates

Management’s Discussion and Analysis of Financial Condition and Results of Operations and Note 1 to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2016,2017, describe the significant accounting estimates and policies used in preparation of our consolidated financial statements. Actual results in these areas could differ from management’s estimates. During the three and nine months ended September 30, 2017, we have notMarch 31, 2018, Solitario adopted any additionalASU No. 2016-01. Solitario recorded an accumulated effect of the change in accounting policies, with the exceptionprinciple to retained earnings of $576,000 related to the adoption of ASU 2017 – 01, discussed above.2016-01. See Note 9, “Shareholders’ Equity and Accumulated Other Comprehensive Income” to the unaudited consolidated financial statements, for a discussion of ASU 2016-01.

(j)(i) Related Party Transactions

As of September 30, 2017,March 31, 2018, and for the three and nine months ended September 30, 2017,March 31, 2018, we have no related party transactions or balances.

(k)(j) Recent Accounting Pronouncements

See Note 1, “Business and Summary of Significant Accounting Policies,” to the unaudited condensed consolidated financial statements underRecent Accounting Pronouncements” above for a discussion of our significant accounting policies.

(l)(k) Forward Looking Statements

This Form 10-Q contains forward-looking statements, within the meaning of Section 27A of the Securities Act of 1933, as amended and Section 21E of the 1934 Act with respect to our financial condition, results of operations, business prospects, plans, objectives, goals, strategies, future events, capital expenditures, and exploration and development efforts. Words such as “anticipates,” “expects,” “intends,” “forecasts,” “plans,” “believes,” “seeks,” “estimates,” “may,” “will,” and similar expressions identify forward-looking statements. These forward-looking statements are based on our current expectations and assumptions about future events and are based on currently available information as to the outcome and timing of future events. When considering forward-looking statements, you should keep in mind the risk factors and other cautionary statements described under the heading "Risk Factors" included in Item 1A of Part I of our Annual Report on Form 10-K for the year ended December 31, 2016.2017. These forward-looking statements appear in a number of places in this report and include statements with respect to, among other things:

Although we have attempted to identify important factors that could cause actual results to differ materially from those described in forward-looking statements, there may be other factors that cause results not to be as anticipated, estimated or intended. There can be no assurance that these statements will prove to be accurate as actual results and future events could differ materially from those anticipated in the statements. Except as required by law, we assume no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise.

Item 3.   Quantitative and Qualitative Disclosures about Market Risk

Smaller Reporting Companies are not required to provide the information required by this item.

Item 4.   Controls and Procedures

Disclosure Controls and Procedures

As required by Rule 13a-15 under the 1934 Act, as of September 30, 2017,March 31, 2018, we carried out an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures. This evaluation was carried out under the supervision and with the participation of our Chief Executive Officer (our principal executive officer) and our Chief Financial Officer (our principal financial officer). Based upon and as of the date of that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of September 30, 2017.March 31, 2018.

Disclosure controls and procedures are controls and other procedures that are designed to ensure that information required to be disclosed in our reports filed or submitted under the 1934 Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed in our reports filed under the 1934 Act is accumulated and communicated to our management, including our principal executive officer and our principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.

Changes in Internal Control Over Financial Reporting

There were no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) promulgated under the 1934 Act) during the quarter ended September 30, 2017,March 31, 2018 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II - OTHER INFORMATION

None

Except for risks attendant with the closing of the Acquisition, including those identified in our Quarterly Report on Form 10-Q for the quarter ended June 30, 2017, thereThere are no material changes to the Risk Factors associated with our business disclosed in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2016.2017.

There were no purchasesThe following table provides information about our purchase of our common shares under the share repurchase program during the three months ended September 30, 2017.March 31, 2018.

None

None

On November 7, 2017, Solitario Board of Directors approved an extension of its existing share repurchase program through December 31, 2018. The share repurchase program, as initially approved in October 2015, authorized Solitario to repurchase up to 2.0 million shares of its outstanding common stock and was set to expire on December 31, 2017.None

As of November 7, 2017, Solitario has repurchased 659,300 shares for an aggregate purchase price of $343,000. Under the program, as now extended, Solitario will have the ability to repurchase up to the remaining 1,340,700 available shares under the plan through December 31, 2018. All shares repurchased will be cancelled and will reduce Solitario’s current 58.4 million shares outstanding.

The timing and amount of any stock repurchased will be determined by Solitario’s Company’s management in the open market or in privately negotiated transactions based on market conditions and other factors, including price, regulatory requirements and capital availability, and in compliance with applicable state and federal securities laws. Repurchases may also be made under Rule 10(b)-18. The program does not require the repurchase of any minimum number of shares and may be suspended, modified or discontinued at any time without prior notice. No repurchases will be made outside of the United States, including shares trading on the Toronto Stock Exchange. Payment for shares repurchased under the program will be funded using Solitario’s working capital.

The Exhibits to this report are listed in the Exhibit Index.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

SOLITARIO ZINC CORP.

EXHIBIT INDEX