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Syndax Pharmaceuticals Inc

For the period ended Jun 30, 2025. Filed Aug 4, 2025.

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About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Jun 30, 2025 · Filed Aug 4, 2025

SNDX$9.54+1.8%Stored close · as of Nov 6, 2026

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Notes to Consolidated Financial Statements

  1. Nature of Business

Syndax Pharmaceuticals, Inc. is a commercial-stage biopharmaceutical company advancing innovative cancer therapies. We currently have two commercially approved products and a robust slate of clinical development programs. We were incorporated in Delaware in 2005. We have operations in New York, NY, and we operate inone segment. References in these notes to consolidated financial statements to “Syndax,” “the Company,” “we,” “us” or “our” refer to Syndax Pharmaceuticals, Inc. and its wholly owned subsidiaries.

We are subject to challenges and risks specific to our business and our ability to execute on our strategy, as well as risks and uncertainties common to companies in the pharmaceutical industry with development and commercial operations, including, without limitation, risks and uncertainties associated with: revenue generation from Revuforj and Niktimvo; obtaining regulatory approval of additional indications for our approved products; delays or problems in the supply of our products, loss of single source suppliers or failure to comply with manufacturing regulations; identifying, acquiring or in-licensing additional products or product candidates; pharmaceutical product development and the inherent uncertainty of clinical success; the challenges of protecting and enhancing our intellectual property rights; and complying with applicable regulatory requirements.

  1. Basis of Presentation

The accompanying unaudited interim consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles, or U.S. GAAP. Any reference in these notes to applicable guidance is meant to refer to U.S. GAAP as found in the Accounting Standards Codification, or ASC, and Accounting Standards Updates, or ASU, of the Financial Accounting Standards Board, or FASB.

In the opinion of management, the accompanying unaudited interim financial statements include all normal and recurring adjustments (which consist primarily of accruals and estimates that impact the financial statements) considered necessary to present fairly the Company's financial position as of June 30, 2025 and its results of operations for the three and six months ended June 30, 2025 and 2024 and cash flows for the six months ended June 30, 2025 and 2024. Operating results for the three and six months ended June 30, 2025 are not necessarily indicative of the results that may be expected for the year ending December 31, 2025. The unaudited interim financial statements presented herein do not contain the required disclosures under U.S. GAAP for annual financial statements. The accompanying unaudited interim financial statements should be read in conjunction with the annual audited financial statements and related notes as of and for the year ended December 31, 2024 contained in the Company’s annual report on Form 10-K, filed with the SEC on March 3, 2025.

In 2011, the Company established a wholly owned subsidiary in the United Kingdom, which the Company dissolved in June 2024. In 2014, the Company established a wholly owned U.S. subsidiary, which the Company dissolved in July 2025. In 2021, the Company established a wholly owned subsidiary in the Netherlands. To date, there have been no material activities for these entities. All intercompany balances and transactions have been eliminated in consolidation.

  1. Summary of Significant Accounting Policies

The Company’s significant accounting policies, which are disclosed in the audited consolidated financial statements for the year ended December 31, 2024, and the notes thereto are included in the Company’s Annual Report on Form 10-K that was filed with the SEC on March 3, 2025. Since the date of filing, there have been no material changes to the Company’s significant accounting policies except as noted below.

Use of Estimates

The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of costs and expenses during the reporting period. The Company bases estimates and assumptions on historical experience when available and on various factors that it believes to be reasonable under the circumstances. The Company evaluates its estimates and assumptions on an ongoing basis.

Estimatesand assumptions about future events and their effects cannot be determined with certainty and therefore require the exercise of judgment. As of the date of issuance of these consolidated financial statements, the Company is not aware of any specific event or circumstance that would require the Company to update its estimates, assumptions and judgments or revise the carrying value of its assets or liabilities. These estimates may change as new events occur and additional information is obtained and are recognized inthe consolidated financial statements as soon as they become known. Actual results could differ from those estimates and any such differences may be material to the Company’s consolidated financial statements.

Income taxes

In accordance with Topic ASC 270, Interim Reporting, and Topic ASC 740, Income Taxes, the Company is required at the end of each interim period to determine the best estimate of its annual effective tax rate and then apply that rate in providing for income taxes on a current year-to-date (interim period) basis. For the six months ended June 30, 2025 and 2024, the Company recordedno tax expense or benefit due to the expected current year loss and its historical losses. As of June 30, 2025 and December 31, 2024, the Company concluded that a full valuation allowance would be necessary for all of its net deferred tax assets. The Company had no amounts recorded for uncertain tax positions, interest or penalties in the accompanying consolidated financial statements.

On July 4, 2025, the One Big Beautiful Bill Act, or OBBBA, was enacted in the United States. The OBBBA includes significant changes, such as the permanent extension of certain expiring provisions of the Tax Cuts and Jobs Act, modifications to certain aspects of the international tax framework and the restoration of favorable tax treatment for certain business expense provisions. The legislation has multiple effective dates, with certain provisions effective in 2025 and others implemented through 2027. The Company is currently assessing its impact on its consolidated financial statements.

Collaboration revenue, net

In September 2021, the Company entered into the Incyte License and Collaboration Agreement, or the Incyte License, with Incyte covering the worldwide development and commercialization of axatilimab. In August 2024, the U.S. Food and Drug Administration, or FDA, approved Niktimvo for the treatment of chronic graft-versus host disease, or cGVHD, after failure of at least two prior lines of systemic therapy in adult and pediatric patients weighing at least 40 kg (88.2 lbs). See Note 4 — Incyte Collaboration for further details on the Incyte License and Collaboration Agreement.

In accordance with Topic ASC 808, Collaboration Arrangements, Incyte has been identified as the principal in product sales, therefore, the Company will recognize its share of any profits or losses in the amount of net product sales less cost of goods sold and shared commercial and other expenses, in the period in which the underlying sales and costs are recognized. The Company’s share of net profits in connection with commercialization of products will be presented as “Collaboration revenue, net” and its share of net losses will be presented as “Collaboration loss” within operating expenses. The year to date "Collaboration revenue, net" or "Collaboration loss" will be presented as the net cumulative amount for all periods reported on in the financial statements. The Company will continue to recognize the costs associated with ongoing development services in the R&D operating expense line, including any cost-sharing components with Incyte.

Recently Issued and Adopted Accounting Pronouncements

From time to time, new accounting pronouncements are issued by the FASB or other accounting standard setting bodies that we adopt as of the specified effective date. Unless otherwise discussed below, we do not believe that the adoption of recently issued standards have or may have a material impact on our consolidated statements or disclosures.

In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses (ASU “2024-03”). Among other items, the requirements include expanded disclosures around employee compensation and selling expenses. ASU 2024-03 will be effective for the Company for the year ending December 31, 2027. The Company is still evaluating the impact of this new guidance on its consolidated financial statements but expect the adoption to result in disclosure changes only.

  1. Significant Collaborative Research and License Agreements

Incyte Collaboration

In September 2021, the Company entered into the Incyte License, with Incyte covering the worldwide development and commercialization of axatilimab. Also in September 2021, the Company entered into a share purchase agreement with Incyte, or the Incyte Share Purchase Agreement. These agreements are collectively referred to as the Incyte Agreements. Under the terms of the Incyte Agreements, Incyte received exclusive commercialization rights outside of the United States, subject to certain royalty payment obligations set forth below. In the United States, Incyte and the Company are co-commercializing and co-promoting axatilimab as

Niktimvo™ (axatilimab-csfr). The Company and Incyte share equally the profits and losses from co-commercialization efforts in the United States.

The Company and Incyte have agreed to continue to co-develop axatilimab and to share development costs associated with global and additional U.S.-specific clinical trials, with Incyte responsible for 55% of such costs and the Company responsible for 45% of such costs. Each company will be responsible for funding any of its own independent development activities. Incyte is responsible for 100% of future development costs for trials that are specific to ex-U.S. countries. All development costs related to the collaboration will be subject to a joint development plan.

Under the terms of the Incyte Agreements, in December 2021, Incyte paid the Company a non-refundable cash payment of $117.0 million and the Company issued 1,421,523 shares of common stock with an aggregate purchase price of $35.0 million, or $24.62 per share. Additionally, under the terms of the Incyte Agreements, the Company is eligible to receive up to $220.0 million in future contingent development and regulatory milestones and up to $230.0 million in commercialization milestones as well as tiered royalties ranging in the mid-teens percentage on net sales of the licensed product comprising axatilimab in Europe and Japan and low double digit percentage in the rest of the world outside of the United States. The Company’s right to receive royalties in any particular country will expire upon the last to occur of (a) the expiration of licensed patent rights covering the licensed product in that particular country, (b) a specified period of time after the first post - marketing authorization sale of a licensed product in that country, and (c) the expiration of any regulatory exclusivity for that licensed product in that country.

In August 2024, the FDA approved Niktimvo for the treatment of cGVHD after failure of at least two prior lines of systemic therapy in adult and pediatric patients weighing at least 40 kg (88.2 lbs).

For the three months ended June 30, 2025, the Company has recognized collaboration revenue of$9.4 million. As of June 30, 2025, the Company has recorded approximately$16.6 million as a collaboration receivable due from Incyte related to the Collaboration revenue and the Company’s development and pre-commercialization costs under the Incyte Agreements and has recorded approximately$4.3 million as a collaboration payable due to Incyte for development and pre-commercialization costs incurred by Incyte as of June 30, 2025. R&D expense and cost offset are recorded as part of operating expenses. The Company’s share of Collaboration profit or loss is based on net sales of Niktimvo and the collaborative commercialization expenses.

Vitae Pharmaceuticals, Inc.

In October 2017, the Company entered into a license agreement, or the Vitae License Agreement, with Vitae Pharmaceuticals, Inc., or Vitae, a subsidiary of AbbVie, Inc., under which the Company was granted an exclusive, sublicensable, worldwide license to a portfolio of preclinical, orally available, small molecule inhibitors of the Menin–KMT2A binding interaction, or the Menin Assets. Upon execution of the agreement, the Company agreed to pay Allergan up to $99.0 million in one-time development and regulatory milestone payments over the term of the Vitae License Agreement, subject to the achievement of certain milestone events. In the event that the Company or any of its affiliates or sublicensees commercializes the Menin Assets, the Company will also be obligated to pay Vitae low single to low double-digit royalties on sales, subject to reduction in certain circumstances, as well as up to an aggregate of $70.0 million in potential one-time, sales-based milestone payments based on achievement of certain annual sales thresholds. The Company is solely responsible for the development and commercialization of the Menin Assets. Each party may terminate the Vitae License Agreement for the other party’s uncured material breach or insolvency, and the Company may terminate the Vitae License Agreement at any time upon advance written notice to Vitae. Vitae may terminate the Vitae License Agreement if the Company or any of its affiliates or sublicensees institutes a legal challenge to the validity, enforceability, or patentability of the licensed patent rights. Unless terminated earlier in accordance with its terms, the Vitae License Agreement will continue on a country-by-country and product-by-product basis until the later of: (i) the expiration of all of the licensed patent rights in such country; (ii) the expiration of all regulatory exclusivity applicable to the product in such country; and (iii)10 years from the date of the first commercial sale of the product in such country.

As of the date of the Vitae License Agreement, the asset acquired had no alternative future use nor had it reached a stage of technological feasibility. As the processes or activities that were acquired along with the license do not constitute a “business,” the transaction has been accounted for as an asset acquisition. In the three months ended June 30, 2025 the Company the submitted an supplemental New Drug Application (sNDA) to the U.S. FDA for a second indication for Revuforj. As a result, an expense of $5.0 million was recognized under the Vitae License agreement for the successful completion of the first pivotal trial of a second indication for Revuforj. Since the inception of the agreement, we have recognized, in the aggregate, $31.0 million of expense for the achievement of development and regulatory milestones. AbbVie is eligible to receive up to $68.0 million of additional future contingent development and regulatory milestones. The Company has not recognized any expense for the achievement of sales-based milestones since the inception of the agreement.

UCB Biopharma Sprl

In 2016, the Company entered into a license agreement, or the UCB License Agreement, as amended from time to time, with UCB Biopharma Sprl, or UCB, under which UCB granted to the Company a worldwide, sublicensable, exclusive license to UCB6352, which the Company refers to as axatilimab, an anti-CSF-1R monoclonal antibody. Upon execution of the agreement, the Company agreed to pay UCB up to $119.5 millionin one-time development and regulatory milestone payments over the term of the UCB

License Agreement, subject to the achievement of certain milestone events. In the event that the Company or any of its affiliates or sublicensees commercializes axatilimab, the Company will also be obligated to pay UCB low double-digit royalties on sales, subject to reduction in certain circumstances, as well as up to an aggregate of $250.0 million in potential one-time, sales-based milestone payments based on achievement of certain annual sales thresholds. Under certain circumstances, the Company may be required to share a percentage of non-royalty income from sublicensees, subject to certain deductions, with UCB. The Company is solely responsible for the development and commercialization of axatilimab, except that UCB was responsible for performing a limited set of transitional chemistry, manufacturing and control tasks related to axatilimab. Each party may terminate the UCB License Agreement for the other party’s uncured material breach or insolvency, and the Company may terminate the UCB License Agreement at any time upon advance written notice to UCB. UCB may terminate the UCB License Agreement if the Company or any of its affiliates or sublicensees institutes a legal challenge to the validity, enforceability, or patentability of the licensed patent rights. Unless terminated earlier in accordance with its terms, the UCB License Agreement will continue on a country-by-country and product-by-product basis until the later of: (i) the expiration of all of the licensed patent rights in such country; (ii) the expiration of all regulatory exclusivity applicable to the product in such country; and (iii)10 years from the date of the first commercial sale of the product in such country.

As of the date of the UCB License Agreement, the asset acquired had no alternative future use nor had it reached a stage of technological feasibility. As the processes or activities that were acquired along with the license do not constitute a “business,” the transaction has been accounted for as an asset acquisition. As a result, in 2016, the upfront payment of $5.0 million was recorded as research and development expense in the consolidated statements of operations. In connection with its most recent amendment of the UCB License Agreement, in the second quarter of 2022 the Company paid UCB $5.8 million, which was recognized as a milestone expense. In the first quarter of 2025, the Company paid a $10.0 million milestone as a result of the first patient dosed in a Phase III Study with the licensed compound in a combination with another agent for any indication. Since the inception of the agreement, we have recognized in the aggregate, $41.0 million of expense for the achievement of development and regulatory milestones. UCB is eligible to receive up to $78.5 million of additional future contingent development and regulatory milestones. The Company has not recognized any expense for the achievement of sales-based milestones since the inception of the agreement.

  1. Net Loss per Share Attributable to Common Stockholders

Basic net loss per share attributable to common stockholders is computed by dividing the net loss attributable to common stockholders by the weighted-average number of common shares outstanding for the period. Because the Company has reported a net loss for all periods presented, diluted net loss per common share is the same as basic net loss per common share for those periods. The following table summarizes the computation of basic and diluted net loss per share attributable to common stockholders of the Company:

Three Months Ended June 30,Six Months Ended June 30,
2025202420252024
(In thousands, except share and pershare data) · (In thousands, except share and pershare data)
Numerator—basic and diluted:
Net loss$(71,847)$(68,063)$(156,693)$(140,463)
Net loss attributable to common stockholders—basic and diluted$(71,847)$(68,063)$(156,693)$(140,463)
Net loss per share attributable to common stockholders—basic and diluted$(0.83)$(0.80)$(1.82)$(1.65)
Denominator—basic and diluted:
Weighted-average number of common shares used to compute net loss per share attributable to common stockholders—basic and diluted86,337,23785,274,82986,255,02085,244,015

The following potentially dilutive securities have been excluded from the computation of diluted weighted-average shares outstanding because such securities have an antidilutive impact due to losses reported (in common stock equivalent shares):

June 30,
20252024
Options to purchase common stock13,933,00312,226,274
Employee Stock Purchase Plan88,99929,426
Non-vested restricted stock units (RSUs)2,577,6781,486,146

For additional information related to the Company’s common stock see Note 12 — Stock Based Compensation.

  1. Other Receivables

In April 2024, entinostat received marketing approval in China. As a result the Company recorded $3.5 million of milestone revenue in 2024. As of June 30, 2025, the Company recorded a $3.6 million milestone receivable related to achieved milestones under the license agreement with Eddingpharm. Full payment of the receivable is expected by December 2026.

  1. Fair Value Measurements

The carrying amounts of cash and cash equivalents, restricted cash, accounts payable, and accrued expenses approximated their estimated fair values due to the short-term nature of these financial instruments. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value are performed in a manner to maximize the use of observable inputs and minimize the use of unobservable inputs. The accounting standard describes a fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value, which are the following:

Level 1—Quoted prices (unadjusted) in active markets that are accessible at the market date for identical unrestricted assets or liabilities.

Level 2—Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs for which all significant inputs are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The table below presents information about the Company’s assets and liabilities that are regularly measured and carried at fair value and indicate the level within the fair value hierarchy of valuation techniques the Company utilized to determine such fair values (in thousands):

Fair Value Measurements Using
Quoted
Prices · Significant
(unadjusted) · Other · Significant
Totalin ActiveObservableUnobservable
CarryingMarketsInputsInputs
Value(Level 1)(Level 2)(Level 3)
(In thousands)
Assets:
Cash and cash equivalents$108,636$108,636$—$—
Short-term investments346,597—346,597—
Long-term investments62,627—62,627—
Total assets$517,860$108,636$409,224$—
Assets:
Cash and cash equivalents$154,083$129,187$24,896$—
Short-term investments418,801—418,801—
Long-term investments119,520—119,520—
Total assets$692,404$129,187$563,217$—

There have been no material impairments of our assets measured and carried at fair value during the periods ended June 30, 2025 and 2024. In addition, there have been no changes in valuation techniques during the periods ended June 30, 2025 and 2024. The fair value of Level 1 instruments classified as cash equivalents are valued using quoted market prices in active markets. The fair value of Level 2 instruments classified as short and long-term investments are determined based on quoted prices in active markets, which are either directly or indirectly observable as of the reporting date with fair value being determined using models or other valuation methodologies.

The Company’s short and long-term investments are classified as available-for-sale securities. As of June 30, 2025, the remaining contractual maturities of the available-for-sale securities were 1 to 16 months, and the balance in the Company’s accumulated other comprehensive gain was comprised solely of activity related to the Company’s available-for-sale securities. There wereno realized gains or losses recognized on the sale or maturity of available-for-sale securities, during thethree and six months ended June 30, 2025 and 2024. As a result, the Company did not reclassify any amounts out of accumulated other comprehensive gain for the same periods.

The following table summarizes the available-for-sale securities:

Amortized · Unrealized · Unrealized
CostGainsLossesFair Value
(In thousands)
Commercial paper$215,379$—$(23)$215,356
Corporate bonds24,63938—24,677
US Treasury168,924267—169,191
$408,942$305$(23)$409,224
Commercial paper$263,952$—$(56)$263,896
Corporate bonds40,261——40,261
US Treasury233,945219—234,164
$538,158$219$(56)$538,321
  1. Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following (in thousands):

June 30, 2025December 31, 2024
Prepaid insurance$1,788$1,276
Interest receivable on investments2,0252,634
Prepaid subscription1,4711,605
Prepaid state and local taxes359298
Prepaid rent18107
Prepaid inventory2,7422,009
Other1,472612
Total prepaid expenses and other current assets$9,875$8,541
  1. Inventory

Inventory consisted of the following (in thousands):

June 30, 2025December 31, 2024
Raw materials$14,175$—
Work-in-process1,275330
Finished goods2,24636
Total Inventory$17,696$366

Inventories are stated at the lower of cost or net realizable value, as determined on a first-in, first-out basis.

  1. Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following (in thousands):

June 30, 2025December 31, 2024
Product revenue allowances$5,204$849
Accrued clinical study and trial costs21,20323,869
Accrued selling, general, and administrative costs5,5824,258
Accrued compensation and related costs14,50514,477
Accrued professional fees—385
Accrued milestone costs5,00010,600
Accrued royalty interest expense18,9544,930
Other618421
Total accrued expenses and other current liabilities$71,066$59,789
  1. Royalty Interest Financing Liability

On November 4, 2024, the Company entered into a Purchase and Sale Agreement, or the Purchase and Sale Agreement, with Royalty Pharma Development Funding, LLC, or Royalty Pharma, pursuant to which Royalty Pharma purchased rights to certain revenue streams from net sales of products comprising or containing axatilimab (including Niktimvo™) by Syndax, its affiliates and its licensees in the United States and its respective territories, districts, commonwealths and possessions (including Guam and Puerto Rico) in exchange for an upfront fee of $350 million.

Pursuant to the Purchase and Sale Agreement, Royalty Pharma purchased the right to receive a percentage of net sales equal to a royalty rate of 13.8% on quarterly net sales of Niktimvo in the United States and its respective territories; provided that the royalty rate is subject to certain adjustments based on future aggregate net sales of the product in the United States and its respective territories, or the Revenue Participation Right. Aggregate payments made to Royalty Pharma in respect of the Revenue Participation Right will be capped at $822.5 million, or the Royalty Cap.

The Purchase and Sale Agreement contains customary representations, warranties and indemnities of the Company and Royalty Pharma and customary covenants relating to the royalty payments, including the grant of a back-up security interest in the purchased royalties and certain assets related to the product and restrictions on the incurrence of additional indebtedness and on the existence of liens on the Company’s assets related to the product.

Upon a change of control, the Company will have the right, but not the obligation, to repurchase the Revenue Participation Right at a repurchase price set forth in the Purchase and Sale Agreement. In addition, the Purchase and Sale Agreement provides that if certain events of default occur, including certain bankruptcy events or certain termination events with respect to the Company’s license agreement with UCB Biopharma Srl, Royalty Pharma may require the Company to repurchase Royalty Pharma’s interests in the Revenue Participation Right at a repurchase price equal to the Royalty Cap.

The Company assessed the Purchase and Sale Agreement and identified it as a sale of future revenue in the form of a debt instrument to be accounted for as a liability under Topic ASC 470, Borrower’s Accounting for Debt Modifications. The Company has elected to use the prospective method in its calculation of its effective interest rate and will update this calculation quarterly when there are changes in the projected sales. The debt is allocated on the balance sheet as short term and long term. The short term portion represents the royalty payments owed over the next 12 months. The long term portion is recorded on the balance sheet as net of issuance costs. Issuance costs pursuant to the Purchase and Sale Agreement consisted primarily of bank and legal fees and totaled $6.3 million. These issuance costs were recorded as a direct deduction to the carrying amount of the liability and will be amortized under the effective interest method over the estimated period the liability will be repaid. For the period ended June 30, 2025, the Company estimated an effective annual interest rate of approxim ately 9.08%. Over the course of the Purchase and Sale agreement, the annual interest rate will be affected by the amount and timing of net Niktimvo revenue recognized and change in timing of forecasted net Niktimvo revenue. On a quarterly basis, the Company reassesses the expected timing of the net Niktimvo revenue, recalculates the amortization and effective interest rate, and adjusts the accounting prospectively, as needed. For the three months ended June 30, 2025, the Company recognized interest expense of $15.9 million related to the Purchase and Sale Agreement.

June 30, 2025December 31, 2024
Current portion of royalty interest financing liability$19,435$12,116
Royalty interest financing liability, less current portion330,565337,884
Debt issuance costs(6,152)(6,319)
Total royalty interest financing liability, net$343,848$343,681
  1. Stock-Based Compensation

In January 2025, the number of shares of common stock available for issuance under the Company’s 2015 Omnibus Incentive Plan, or the 2015 Plan, was increased by 3,427,778 shares of common stock due to the automatic annual provision to increase shares of common stock available under the 2015 Plan. Additionally in July 2024 and in December 2024, the Company’s board of directors approved increases of 500,000 shares and 1,200,000 shares, respectively, of common stock available for issuance under the Company’s 2023 Inducement Plan, or the Inducement Plan.

As of June 30, 2025, there were 4,781,319 shares of common stock available for issuance under the 2015 Plan and 966,200 shares of common stock available for issuance under the Inducement Plan.

The Company recognized stock-based compensation expense related to the issuance of stock option awards and restricted stock units to employees and non-employees and related to the Company’s 2015 Employee Stock Purchase Plan, or ESPP, in the consolidated statements of comprehensive loss as follows:

Three Months Ended June 30,Six Months Ended June 30,
2025202420252024
Research and development$4,196$4,318$7,864$8,461
Selling, general and administrative9,5915,57816,30310,334
Total$13,787$9,896$24,167$18,795

Compensation expense by type of award in thethree and six months ended June 30, 2025 and 2024 was as follows:

Three Months Ended June 30,Six Months Ended June 30,
2025202420252024
Stock options$8,707$7,801$16,392$14,985
RSUs4,7571,9997,3323,616
ESPP32396443194
Total$13,787$9,896$24,167$18,795

In addition, stock-based compensation expense of$0.2 million was capitalized to inventory as of June 30, 2025, which represents the stock-based compensation expense incurred related to employees involved in the manufacturing process of finished goods and samples.

As of June 30, 2025, there were$92.2 million of unrecognized compensation costs related to employee and non-employee unvested stock options and RSUs granted under the Inducement Plan, 2015 Plan and the Company’s 2007 Stock Plan, which are expected to be recognized over a weighted-average remaining service period of 2.57 years.

Employee Benefit Plan

The Company maintains a defined contribution 401(k) retirement plan. For the three and six months ended June 30, 2025, the Company made $0.3 million and $2.6 million of contributions to the plan, respectively. For the three and six months ended June 30, 2024, the Company made $0.6 million and $2.1 million of contributions to the plan, respectively. The Company’s contributions are made in cash.

  1. Stockholders’ Equity

Pre-Funded Warrants

In December 2021, the Company sold pre-funded warrants to purchase 1,142,856 shares of common stock. As of June 30, 2025,285,714 pre-funded warrants were issued and outstanding.

  1. Commitments and Contingencies

License Agreements

The Company is obligated to pay royalties pursuant to the Vitae License Agreement and the UCB License Agreement as a percentage of net product sales for direct licensed products, such as Revuforj and Niktimvo. The obligation to pay royalties expires, on a country-by-country basis and licensed product-by-licensed product basis at the later of (i) the expiration of all of the licensed patent rights in such country; (ii) the expiration of all regulatory exclusivity applicable to the product in such country; and (iii) 10 years from the date of the first commercial sale of the product in such country. These fees were recorded as cost of product sales.

From time to time, the Company may be subject to various claims and proceedings in the ordinary course of business. If the potential loss from any claim, asserted or unasserted, or proceeding is considered probable and the amount is reasonably estimable, the Company will accrue a liability for the estimated loss. There wereno contingent liabilities recorded as of June 30, 2025.

  1. Segment Reporting

The Company manages its business activities on a consolidated basis and operate as a single operating and reportable segment: Syndax Pharmaceuticals. The Company primarily derives revenue in the United States through milestone revenue and product sales on the approved products, Revuforj® (revumenib) and Niktimvo™ (axatilimab-csfr). The accounting policies of the segment are the same as those described in Note 3 – Summary of Significant Accounting Policies.

To assess performance, the Company’s Chief Operating Decision Maker, or CODM, Michael Metzger, uses consolidated net loss as the segment’s measure of segment profit or loss. The CODM uses net loss in the budget and forecasting process and considers budget-to actual variances on a quarterly bases when making decisions about the allocation of operating and capital resources.

The following table provides the operating financial results of our biopharmaceutical cancer therapeutics segment:

Three Months Ended June 30,Six Months Ended June 30,
2025202420252024
Total Revenue$37,958$3,500$57,753$3,500
Less: Significant and other segment expenses
Cost of product sales1,279—2,164—
Research and development expenses
Revumenib-related costs28,15520,43948,96051,880
Axatilimab-related costs9,0538,50328,76414,104
Other R&D programs1,8265342,7471,500
Personnel cost and other expenses18,99714,86135,52829,202
General and administrative expenses
Commercial-related expenses9,9147,56020,73913,392
Personnel cost and other expenses19,3074,15338,3898,258
Other SG&A expenses4,99311,7709,40520,099
Stock-based compensation13,7879,89624,16718,795
Royalty interest expense7,854—15,903—
Interest expense (income), net(5,946)(6,239)(13,127)(13,440)
Other expense, net58686807173
Segment net loss$(71,847)$(68,063)$(156,693)$(140,463)
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