TG Therapeutics is a fully integrated, commercial stage biopharmaceutical company focused on the acquisition, development and commercialization of novel treatments for B-cell malignancies and autoimmune diseases. In addition to an active research pipeline including five investigational medicines across these therapeutic areas, UKONIQ received accelerated approval from the FDA for the treatment of adult patients with relapsed or refractory marginal zone lymphoma (MZL) who have received at least one prior anti-CD20-based regimen and relapsed or refractory follicular lymphoma (FL) who have received at least three prior lines of systemic therapies. Currently, we have two programs in Phase 3 development for the treatment of patients with relapsing forms of multiple sclerosis (RMS) and patients with chronic lymphocytic leukemia (CLL) and several investigational medicines in Phase 1 clinical development. We also actively evaluate complementary products, technologies and companies for in-licensing, partnership, acquisition and/or investment opportunities.

The accompanying unaudited condensed consolidated financial statements were prepared in accordance with U.S. generally accepted accounting principles, or “GAAP,” for interim financial information and with the instructions to Quarterly Report on Form 10-Q and Article 10 of Regulation S-X of the Exchange Act. Accordingly, they may not include all of the information and footnotes required by GAAP for complete financial statements. All adjustments that are, in the opinion of management, of a normal recurring nature and are necessary for a fair presentation of the condensed consolidated financial statements have been included. Nevertheless, these condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements contained in our Annual Report on Form 10-K for the year ended December 31, 2020. The accompanying condensed December 31, 2020 balance sheet has been derived from these statements. The results of operations for the three months ended March 31, 2021 are not necessarily indicative of the results that may be expected for the entire fiscal year or any other interim period.

In December 2018, the Company created an Australian corporation, TG Therapeutics AUS Pty Ltd. (“TG AUS”), as a wholly-owned subsidiary. This corporation’s functional currency, the Australian dollar, is also its reporting currency, and its financial statements are translated to U.S. dollars, the Company’s reporting currency, prior to consolidation. The activities of TG AUS result in immaterial currency translation adjustments and, thus, are included in Other Income/Expense on the Company’s condensed consolidated statement of operations. The accompanying condensed consolidated financial statements include the accounts of the Company and its subsidiaries, and all intercompany accounts and transactions have been eliminated in consolidation.

We have incurred operating losses since our inception and expect to continue to incur operating losses for the foreseeable future and may never become profitable. As of March 31, 2021, we have an accumulated deficit of $1.1 billion.

Our major sources of cash have been proceeds from private placements and public offerings of equity securities. During the first quarter of 2021, umbralisib, now referred to as UKONIQ, was granted accelerated approval in the United States for the treatment of adult patients with relapsed or refractory MZL who have received at least one prior anti-CD20 based regimen and adult patients with relapsed or refractory FL who have received at least three prior lines of systemic therapy. Commercial sales of UKONIQ commenced in the first quarter of 2021. We have generated limited revenues to date from product sales. Even with the commercialization of UKONIQ and the potential future commercialization of our other drug candidates, we may not become profitable. Our ability to achieve profitability depends on many factors,

including our ability to generate revenue, our ability to obtain regulatory approvals for our drug candidates, our ability to successfully complete any post-approval regulatory obligations and our ability to successfully commercialize our drug candidates. We may continue to incur substantial operating losses even as we begin to generate revenues from our drug candidates.

As of March 31, 2021, we had $523.8 million in cash and cash equivalents, and investment securities. We anticipate that our cash and cash equivalents, and investment securities as of March 31, 2021 will provide sufficient liquidity for more than a twelve-month period from the date of filing this Quarterly Report on Form 10-Q. The actual amount of cash that we will need to operate is subject to many factors, including, but not limited to, our UKONIQ commercialization efforts, preparations for the potential commercialization of our other drug candidates, and the timing, design and conduct of clinical trials for our drug candidates. We are dependent upon significant future financing to provide the cash necessary to execute our ongoing and future operations, including the commercialization of any of our drug candidates.

Our common stock is quoted on the Nasdaq Capital Market and trades under the symbol “TGTX.”

Our significant accounting policies are described in Note 1 of Notes to Consolidated Financial Statements included in our 2020 Annual Report on Form 10-K, except as it relates to revenue recognition, accounts receivable, inventory, cost of product revenue, and the adoption of new accounting standards during the three months ended March 31, 2021, as discussed below.

Pursuant to Topic 606, we recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve this core principle, Topic 606 includes provisions within a five-step model that includes i) identifying the contract with a customer, ii) identifying the performance obligations in the contract, iii) determining the transaction price, iv) allocating the transaction price to the performance obligations, and v) recognizing revenue when, or as, an entity satisfies a performance obligation.

At contract inception, we assess the goods or services promised within each contract and assess whether each promised good or service is distinct and determine those that are performance obligations. We then recognize as revenue the amount of the transaction price that is allocated to the respective performance obligation when the performance obligation is satisfied.

Product Revenue, Net - The Company recognizes product revenues, net of variable consideration related to certain allowances and accruals, when the customer takes control of the product, which is typically upon delivery to the customer. Product revenue is recorded at the net sales price, or transaction price. The Company records product revenue reserves, which are classified as a reduction in product revenues, to account for the components of variable consideration. Variable consideration includes the following components: chargebacks, government rebates, trade discounts and allowances, product returns, and co-payment assistance, which are described below.

These reserves are based on estimates of the amounts earned or to be claimed on the related sales and are classified as reductions of accounts receivable (if the amount is expected to be settled with a credit against to the Company's customer account) or a liability (if the amount is expected to be settled with a cash payment). The Company's estimates of reserves established for variable consideration are calculated based upon a consistent application of the expected value method, which is the sum of probability-weighted amounts in a range of possible consideration amounts. These estimates reflect the Company's current contractual and statutory requirements, specific known market events and trends, industry data, and forecasted customer buying and payment patterns. The amount of variable consideration that is included in the transaction price may be subject to constraint and is included in net product revenues only to the extent that it is probable that a significant reversal in the amount of the cumulative revenue recognized will not occur in a future period. Actual amounts of consideration received may ultimately differ from the Company's estimates. If actual results vary, the Company adjusts these estimates, which could have an effect on earnings in the period of adjustment.

Chargebacks and Administrative Fees: Chargebacks for discounts represent the Company's estimated obligations resulting from contractual commitments to sell product to qualified healthcare providers and government agencies at prices lower than the list prices charged to the customers who directly purchase the product from the Company. The customers charge the Company for the difference between what the customers pay the Company for the product and the customers’ ultimate contractually committed or government required lower selling price to the qualified healthcare providers. As part of the Company's contractual commitments to sell product to qualified healthcare providers, the Company pays fees for administrative services, such as account management and data reporting.

Government Rebates: Government rebates consist of Medicare, Tricare, and Medicaid rebates. These reserves are recorded in the same period the related revenue is recognized. For Medicare, the Company also estimates the number of patients in the prescription drug coverage gap for whom it will owe a rebate under the Medicare Part D program.

Trade Discounts and Allowances: The Company provides its customers with discounts that are explicitly stated in the contracts and are recorded in the period the related product revenue is recognized. In addition, the Company also receives sales order management, inventory management, and data services from its customers in exchange for certain fees.

Product Returns: Consistent with industry practice, the Company generally offers customers a limited right of return for product that has been purchased from the Company. The Company estimates the amount of its product sales that may be returned by its customers and records this estimate in the period the related product revenue is recognized. The Company currently estimates product return liabilities based on data from similar products and other qualitative considerations, such as visibility into the inventory remaining in the distribution channel.

Subject to certain limitations, the Company’s return policy allows for eligible returns of UKONIQ for credit under the following circumstances:

As of March 31, 2021, the Company has not received any returns.

Co-Payment Assistance Programs: Co-payment assistance is provided to qualified patients, whereby the Company may provide financial assistance to patients with prescription drug co-payments required by the patient's insurance provider. Reserves for co-payment assistance are recorded in the same period the related revenue is recognized.

Accounts Receivable

In general, accounts receivable consists of amounts due from customers, net of customer allowances for cash discounts, product returns and chargebacks. Our contracts with customers have standard payment terms. We analyze accounts that are past due for collectability, and regularly evaluate the creditworthiness of our customers so that we can properly assess and respond to changes in their credit profiles. As of March 31, 2021, we determined an allowance for expected credit losses related to outstanding accounts receivable was currently not required based upon our review of contractual payment terms and individual customer circumstances.

Cost of Product Revenue

Cost of product revenue consists primarily of materials, third-party manufacturing costs, as well as freight and royalties owed to our licensing partner for UKONIQ sales. Based on our policy to expense costs associated with the

manufacture of our products prior to regulatory approval, the manufacturing costs of UKONIQ units recognized as revenue during the three months ended March 31, 2021 were expensed prior to receipt of FDA approval on February 5, 2021, and therefore are not included in costs of product revenue during the current period.

Inventory

Prior to regulatory approval, we expense costs relating to the production of inventory as research and development expense in the period incurred. Following regulatory approval, costs to manufacture those approved products will be capitalized. Inventories are stated at the lower of cost or estimated net realizable value with cost based on the first-in-first-out method. Inventory that can be used in either the production of clinical or commercial products is expensed as research and development costs when identified for use in clinical trials.

Prior to the approval of UKONIQ, all manufacturing and other potential costs related to the commercial launch of UKONIQ were expensed to research and development expense in the period incurred.

Net Loss Per Common Share

Basic net loss per share of our common stock is calculated by dividing net loss applicable to the common stock by the weighted-average number of our common stock outstanding for the period. Diluted net loss per share of common stock is the same as basic net loss per share of common stock since potentially dilutive securities from stock options, stock warrants and convertible preferred stock would have an antidilutive effect either because we incurred a net loss during the period presented or because such potentially dilutive securities were out of the money and should the Company realize net income during the period presented. The cumulative amounts of potentially dilutive securities excluded from the calculation were 12,129,734 securities and 8,579,266 securities for the three month period ended March 31, 2021 and 2020, respectively.

The following outstanding shares of potentially dilutive securities were excluded from the computation of net loss per share attributable to common stockholders for the periods presented because including them would have been antidilutive:


	Three Months Ended
	March 31,
	2021	2020
Unvested restricted stock	9,474,026	5,828,852
Options	2,490,396	2,585,980
Warrants	147,058	147,058
Shares issuable upon note conversion	18,254	17,376
Total	12,129,734	8,579,266

Recently Adopted Accounting Pronouncements

In December 2019, the Financial Accounting Standards Board (“FASB”) issued ASU No 2019-12, Income Taxes

(Topic 740): Simplifying Accounting for Income Taxes (“ASU 2019-12”). ASU 2019-12 removes certain exceptions for recognizing deferred taxes for investments, performing intraperiod allocations, calculating income taxes in interim periods, and adds certain guidance to remove complexity in certain areas. ASU 2019-12 is effective for all entities for annual and interim periods beginning after December 15, 2020. Early adoption of either the entire standard or only those provisions that eliminate or modify requirements is permitted. Adoption of ASU 2019-12 did not have any impact to our condensed consolidated financial statements.

In January 2017, the FASB issued ASU No. 2017-04, Simplifying the Test for Goodwill Impairment (“ASU 2017-04”). ASU 2017-04 eliminates the requirement to calculate the implied fair value of goodwill (i.e., Step 2 of today’s goodwill impairment test) to measure a goodwill impairment charge. Instead, entities will record an impairment charge based on the excess of a reporting unit’s carrying amount over its fair value (i.e., measure the charge based on today’s Step 1). The standard has tiered effective dates, starting in 2020 for calendar-year public business entities PBEs that meet the definition of an SEC filer, excluding smaller reporting companies. Early adoption is permitted for annual and interim

goodwill impairment testing dates after 1 January 2017. Adoption of ASU 2017-04 did not have any impact to our condensed consolidated financial statements.

Other pronouncements issued by the FASB or other authoritative accounting standards with future effective dates are either not applicable or not significant to our consolidated financial statements.