MoonLake Immunotherapeutics

Note 1 —Overview of the Company

Corporate Information

MoonLake Immunotherapeutics (“the Company” or “MoonLake”) is a clinical stage biotechnology company advancing therapies to address significant unmet needs in inflammatory skin and joint diseases. MoonLake Immunotherapeutics is currently a single asset company focused on the development of Sonelokimab (“SLK”), a novel tri-specific IL-17A and IL-17F inhibiting Nanobody that has the potential, based on response levels seen in clinical trials, to drive disease modification in dermatology and rheumatology patients. The Company's Class A Ordinary Shares are listed on the Nasdaq Capital Market (the “Nasdaq”) under the trading symbol “MLTX”.

The Company, a Cayman Islands exempted company was originally incorporated on August 13, 2020 under the name Helix Acquisition Corp. (“Helix”) as a special purpose acquisition company, formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, reorganization, or similar business combination with one or more businesses. On April 5, 2022 Helix consummated such business combination with MoonLake Immunotherapeutics AG ("MoonLake AG"), a stock-based company incorporated in Switzerland in 2021, pursuant to that certain business combination agreement, dated October 4, 2021 (the “Business Combination Agreement”), by and among Helix, MoonLake AG, the existing equityholders of MoonLake AG set forth on the signature pages to the Business Combination Agreement and the equityholders of MoonLake AG that executed joinders to the Business Combination Agreement (collectively, the “ML Parties”), Helix Holdings LLC, a Cayman Islands limited liability company and the sponsor of Helix, and the representative of the ML Parties (such transactions contemplated by the Business Combination Agreement, collectively, the “Business Combination”). Pursuant to the Business Combination Agreement, Helix changed its name from “Helix Acquisition Corporation” to “MoonLake Immunotherapeutics", and MoonLake AG merged with and into Helix, with MoonLake AG as the surviving company in the Business Combination and, after giving effect to such Business Combination, MoonLake AG became a wholly-owned subsidiary of the Company. For financial accounting and reporting purposes, MoonLake AG was deemed the accounting acquirer and Helix was treated as the accounting acquiree, and the Business Combination was accounted for as a reverse recapitalization, in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”).

Note 2 —Basis of Presentation and Significant Accounting Policies

Basis of Presentation

The accompanying consolidated financial statements include those of the Company and its subsidiaries, MoonLake AG, a Swiss stock corporation (Aktiengesellschaft) registered with the commercial register of the Canton of Zug, Switzerland under the number CHE-433.093.536, MoonLake Immunotherapeutics Ltd., a private limited company incorporated in the United Kingdom, and MNLK Immunotherapeutics, Unipessoal Lda, a private limited company incorporated in Portugal, after elimination of all intercompany accounts and transactions. The accompanying consolidated financial statements and notes hereto have been prepared in conformity with U.S. GAAP. Any reference in these notes to applicable guidance is meant to refer to the authoritative U.S. GAAP as found in the Accounting Standards Codification (“ASC”) and Accounting Standards Updates (“ASU”) of the Financial Accounting Standards Board (“FASB”).

All amounts are presented in U.S. Dollar (“$”), unless otherwise indicated. The term and “CHF” refer to the legal currency of Switzerland, "GBP" refers to the legal currency of the United Kingdom, and “€” and "Euro" refer to the legal currency of Portugal.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires the Company to make judgments, estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of expenses. Items of significance for the Company relate to:

•determining assumptions used in estimating the fair value of share-based compensation;

•estimating the recoverability of the deferred tax asset; and

•estimating the amount of accruals in connection with the completion of clinical trial milestones.

The Company bases its judgments and estimates on various factors and information, which may include, but are not limited to, the Company’s forecasts and future plans, current economic conditions and observable market-based transactions of its own shares, the results of which form the basis for making judgments about the carrying value of assets and liabilities and recorded amounts of expenses that are not readily apparent from other sources. To the extent there are material differences between the Company’s estimates and the actual results, the Company’s future results of operation may be affected.

Segment Information

The Company operates as a single operating segment. The Company’s chief operating decision maker ("CODM"), its Chief Executive Officer, manages the Company’s operations on a stand-alone basis for the purposes of allocating resources, and assessing financial performance.

Cash and Cash Equivalents

The Company considers all highly liquid investments with an original maturity of three months or less at the date of purchase to be cash equivalents. Cash and cash equivalents are recorded at cost, which approximates fair value. The Company considers $nil and $59.7 million of short-term marketable debt securities in the form of eurocommercial papers and certificates of deposit to be cash equivalents as of December 31, 2025 and 2024, respectively.

Marketable Securities and Short-Term Investments

The Company invests in short-term marketable securities in the form of debt securities. At the time of purchase, the Company assesses whether such debt security should be classified as held-to-maturity or available-for-sale debt securities.

Debt securities are classified as held-to-maturity when the Company has the positive intent and ability to hold the securities to maturity. Held-to-maturity debt securities are carried at amortized cost, adjusted for accretion of discounts or amortization of premiums to maturity computed under the effective interest method. Such accretion or amortization is included in “Other income, net”. Marketable debt securities not classified as held-to-maturity are classified as available-for-sale and reported at fair value.

Net unrealized gains and losses on available-for-sale debt securities are excluded from the determination of earnings and are instead recognized in the “Accumulated other comprehensive income” component of shareholders’ equity until realized. Realized gains and losses on available-for-sale debt securities are computed based upon the historical cost of these securities, using the specific identification method.

Interest income is recognized when earned. Realized gains and losses are included in "Other income, net" and the cost of securities sold is determined using the specific-identification method.

Marketable debt securities are classified as either “Cash and cash equivalents” or “Short‑term marketable debt securities” according to their original maturity at the time of acquisition. Changes in unrealized gains and losses pertaining to cash equivalent securities are added back into the consolidated statements of cash flows as those are excluded from the determination of earnings but impact the cash and cash equivalents position.

The Company estimates credit losses expected over the life of financial assets based on historical experience, current conditions and reasonable and supportable forecasts. There is no material impact to the consolidated financial statements given the investments are highly liquid thereby carrying negligible credit loss risk and are all held with reputable companies with a low risk of default.

Concentration of Credit Risk

Financial instruments that potentially subject the Company to concentration of credit risk consist of cash accounts in large financial institutions which, at times, may exceed the CHF 100,000 deposit protection limit in Switzerland, the $250,000 Federal Deposit Insurance Corporation deposit insurance coverage limit in the United States, the GBP 85,000 Financial Services Compensation Scheme deposit protection limit in the United Kingdom, or the €100,000 Fundo de Garantia de Depósitos deposit protection limit in Portugal. The Company believes it is not exposed to significant credit risk due to the financial strength of the depository institutions in which the cash and cash equivalents are held. Additionally, the Company ensures further protection against credit risk by diversifying its cash holdings across a variety of credit institutions, thereby minimizing the potential impact of any adverse events on a single institution. Further, the Company's investment strategy for cash (in excess of current business requirements) is set to invest in short-term marketable debt securities. Management actively monitors credit risk in the investment portfolio. Credit risk exposures are controlled in accordance with policies approved by the board of directors to identify, measure, monitor and control credit risks.

Fair Value Measurements

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.

There are three levels of inputs to fair value measurements:

•Level 1, meaning the use of quoted prices for identical instruments in active markets;

•Level 2, meaning the use of quoted prices for similar instruments in active markets or quoted prices for identical or similar instruments in markets that are not active or are directly or indirectly observable; and

•Level 3, meaning the use of unobservable inputs. Observable market data is used when available.

Transfers between Levels 1, 2 or 3 within the fair value hierarchy are recognized at the end of the reporting period when the respective transaction occurred.

Long-Term Debt

Long-term debt is recognized as the amount of cash proceeds received plus the accreted present value of the End of Term Charge (as defined in the Loan and Security Agreement, as defined in Note 4 —Debt), less the unamortized End of Term Charge, debt issuance costs, and debt discount. It is subsequently reported at amortized cost. Interest expense is calculated using the effective interest method and any difference between the proceeds (net of unamortized debt discount, debt issuance costs, End of Term Charge, and accreted present value of End of Term Charge) and the principal amount is recognized through interest expense over the estimated life of the related debt. For the undrawn term loan tranches, allocated issuance costs are recorded as deferred charges - long-term debt, which is included in "Other non-current assets" on the Company’s consolidated balance sheets until drawn. In the case of a milestone event not being met or the tranche availability window expiring undrawn, the deferred asset will be recorded as interest expense on the Company's consolidated statements of operations and comprehensive loss.

Leases

The Company determines if an arrangement is or contains a lease at contract inception. For these arrangements, it is evaluated if the arrangement involves an identified asset that is physically distinct or whether the Company has the right to substantially all of the capacity of an identified asset that is not physically distinct. In arrangements that involve an identified asset, there is also judgment in evaluating if the Company has the right to direct the use of that asset.

MoonLake does not have any finance leases. As of December 31, 2025, the Company hasfive operating leases related to the office spaces located in (i) Dorfstrasse 29, 6300, Zug, Switzerland (comprised oftwo leases), (ii) 95 Regent Street, CB2 1AW, Cambridge, England, United Kingdom, and (iii) Rua Manuel Pinto de Azevedo 860, 4150-335, Porto, Portugal (comprised oftwo leases). The operating leases are recognized over a straight-line basis over the lease term commencing on the date the Company has the right to use the leased property. Right-of-use assets and lease liabilities are measured at the lease commencement date based on the present value of the remaining lease payments over the lease term, determined using the discount rate for the lease at the commencement date. Because the rate implicit in the leases is not readily determinable, the Company uses the incremental borrowing rate as the discount rate, which approximates the interest rate at which the Company could borrow on a collateralized basis with similar terms and payments and in similar economic environments.

Leases with an initial term of 12 months or less and that do not have the option to purchase the underlying asset are not recorded on the consolidated balance sheets, with lease expense for these leases recognized on a straight-line basis over the lease term commencing on the date the Company has the right to use the leased property.

Property and Equipment

Property and equipment, net is stated at cost, net of accumulated depreciation. Depreciation is computed using the straight-line method based on the estimated useful lives ofthree tofive years. As of December 31, 2025, property and equipment, net relates to information technology, office equipment, and leasehold improvements.

Impairment of Long-Lived Assets

The Company reviews all long-lived assets, which consist of operating lease right-of-use assets, and property and equipment, whenever events or changes in circumstance indicate that these assets may not be recoverable. When evaluating long-lived assets, if the Company concludes that the estimated undiscounted cash flows attributable to the assets are less than their carrying value, the Company recognizes an impairment loss based on the excess of the carrying amount of the assets over their respective fair values, which could adversely affect its results of operations. There wasno impairment of long-lived assets for the years ended December 31, 2025, 2024, and 2023.

Research and Development Contract Costs and Accruals

Research and development expenses include employee payroll, consulting, contract research, and contract manufacturing costs attributable to research and development activities and manufacturing of pre-launch inventory, which are expensed as incurred.

Upfront payments and milestone payments made for the licensing of technology are expensed as research and development expenses in the period in which it is probable that a liability has been incurred. Advance payments for goods or services to be received in the future for use in research and development activities are recorded as prepaid expenses. The prepaid amounts are expensed as the related goods are delivered or the services are performed.

The Company has entered into various research and development contracts with companies both inside and outside of the United States. These agreements are generally cancellable, and related payments are recorded as research and development expenses as incurred. The Company records accruals for estimated ongoing research costs. When evaluating the adequacy of the accrued liabilities, the Company analyzes progress of the studies or trials, including the phase or completion of events, invoices received and contracted costs. Estimates are made in determining the accrued balances at the end of any reporting period based on facts and circumstances known at the time. Actual results could differ from the Company’s estimates. The Company’s historical accrual estimates have not been materially different from the actual costs.

Pre-Launch Inventory

Prior to obtaining regulatory approval of a product candidate, the Company may incur production costs to support the commercial launch of such product. Until the date at which regulatory approval has been received or it is considered probable, and the future economic benefit is expected to be realized, all such costs are recorded as research and development expenses as incurred.

A number of factors are considered in incurring such expenses, including the current status in the regulatory approval process, potential impediments to the approval process such as safety or efficacy, anticipated R&D initiatives that could impact the indication in which the compound will be used, viability of commercialization, marketplace trends, and the shelf life of the compound.

Share-Based Compensation

The Company recognizes compensation expense based on estimated fair values for all stock-based payment awards made to eligible employees, members of the board of directors and independent contractors that are expected to vest.

The valuation of stock option awards is determined at the date of grant using the Black-Scholes option pricing model. The Black-Scholes option pricing model requires the Company to make assumptions and judgments about the inputs used in the calculations, such as the fair value of the common stock, expected term, expected volatility of the Company’s common stock, risk-free interest rate and expected dividend yield. The valuation of restricted stock awards is measured by the fair value of the Company’s common stock on the date of the grant.

For all stock options granted, the Company calculated the expected term as the period that share-based awards are expected to be outstanding. The estimate of expected volatility is based on comparative companies’ volatility within the Company's industry. The risk-free rate is based on the yield available on United States Treasury zero-coupon issues corresponding to the expected term of the award.

The fair value of the common stock granted under the ESPP (as defined in Note 14 —Share-Based Compensation) was historically estimated by management with reference to the market-based transaction with its Series A investors, as there was no public market for the common stock.

Share-based payment arrangements are accounted for under the fair value method. Total compensation is measured at grant date, based on the fair value of the award at that date, and recorded in earnings over the period the employees are required to render service. The Company recognizes compensation cost only for those awards expected to meet the service conditions on a straight-line basis over the requisite service period of the award.

Foreign Currency

The functional currency of the Company and its subsidiaries is the U.S. dollar. Balances and transactions denominated in foreign currencies are converted as follows: monetary assets and liabilities are translated using exchange rates in effect at the balance sheet dates and non-monetary assets and liabilities are translated at historical exchange rates. Income and expenses are translated at the daily exchange rate on the respective transaction date.

Gains or losses from foreign currency transactions are included in the consolidated statements of operations and comprehensive loss in "Other income, net". The Company recognized a net foreign currency transaction gain of $599 thousand for the year ended December 31, 2025, a net foreign currency transaction loss of $42 thousand for the year ended December 31, 2024, and a net foreign currency transaction gain of $151 thousand for the year ended December 31, 2023.

Income Taxes

The Company accounts for income taxes by using the asset and liability method of accounting for income taxes. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. A valuation allowance is recorded to the extent it is more likely than not that all or a portion of the Company's deferred tax assets will not be realized. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in operations in the period that includes the enactment date.

Net Loss per Class A Ordinary Shares

Basic net loss per Class A Ordinary Share is calculated using the two-class method under which earnings are allocated to both Class A Ordinary Shares and participating securities. Basic net loss per share is calculated by dividing the net loss attributable to Class A Ordinary Shares by the weighted-average number of Class A Ordinary Shares outstanding for the period. The diluted net loss per Class A Ordinary Share is computed by dividing the net loss using the weighted-average number of Class A Ordinary Shares and, if dilutive, potential Class A Ordinary Shares outstanding during the period.

In periods in which the Company reports a net loss attributable to shareholders of Class A Ordinary Shares, diluted net loss per share attributable to shareholders of Class A Ordinary Shares is the same as basic net loss per share attributable to shareholders of Class A Ordinary Shares, since dilutive Class A Ordinary Shares are not assumed to be outstanding if their effect is anti-dilutive.

Acquisitions

The Company evaluates acquisitions of assets and other similar transactions to assess whether or not the transaction should be accounted for as a business combination or asset acquisition by first assessing whether substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets. On April 29, 2021, MoonLake AG entered into an in-licensing agreement (the “In-License Agreement”) with Merck Healthcare KGaA, Darmstadt, Germany (“MHKDG”) to acquire the Sonelokimab program (the “SLK Program”) and determined that substantially all of the fair value of the gross assets acquired related to IPR&D of SLK. Therefore, this transaction was accounted for as an asset acquisition. IPR&D represents incomplete technologies that the Company acquires, which at the time of acquisition, are still under development and have no alternative future use. The fair value of such technologies is expensed upon acquisition.

Contingent consideration payments (for example milestone payments due upon the occurrence of a specific event) in asset acquisitions are recognized in the period in which it is probable that a liability has been incurred (unless the contingent consideration meets the definition of a derivative, in which case the amount becomes part of the cost in the asset acquired). Upon recognition of the contingent consideration payment, the amount is expensed if it relates to IPR&D or capitalized if it relates to a developed product which is generally considered to be when clinical trials have been completed and regulatory approval obtained.

Future royalty payments due on net sales will be recognized in cost of goods sold when net sales are recognized.

Pensions

The Company accounts for pension assets and liabilities, which requires the recognition of the funded status of pension plans in the Company’s consolidated balance sheets. The liability in respect to defined benefit pension plans is the projected benefit obligation calculated annually by independent actuaries using the projected unit credit method. The projected benefit obligation represents the actuarial present value of the estimated future payments required to settle the obligation that is attributable to employee services rendered before that date. Service costs for such pension plans, represented in the net periodic pension benefit cost, are included in the personnel expenses of the various functions where the employees are engaged. The other components of net benefit cost are included in the consolidated statements of operations and comprehensive loss separately from the service cost component, in “Other income, net.” Plan assets are recorded at their fair value.

Gains or losses arising from plan curtailments or settlements are accounted for at the time they occur. Any net pension asset is limited to the present value of the future economic benefits available to the Company in the form of refunds from the plan or expected reductions in future contributions to the plan. Actuarial gains and losses arising from differences between the actual and the expected return on plan assets are recognized in "Accumulated other comprehensive income".

Recently Adopted Accounting Pronouncements

In December 2023, the FASB issued ASU 2023-09, Income Taxes - Improvements to Income Taxes Disclosure, which amends guidance on to enhance the transparency and decision usefulness of income tax disclosures by disaggregating information about a reporting entity's effective tax rate reconciliation as well as additional information on income taxes paid. It is effective for fiscal years beginning after December 15, 2024. The Company adopted a prospective application of ASU 2023-09 during the year ended December 31, 2025. Refer to Note 15 —Income Taxes for the inclusion of new disclosures required.

Recently Issued Accounting Pronouncements Not Yet Adopted

In November 2024, the FASB issued ASU 2024-03, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosure, which requires a public entity to disclose additional information about specific expense categories in the notes to financial statements on an annual and interim basis. It is effective for fiscal years beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027. In January 2025, the FASB issued ASU 2025-01 to clarify that all public entities, including non-calendar year-end entities, should adopt the disclosure requirements of ASU 2024-03. The Company is currently evaluating the impact this will have on its consolidated financial statements and related disclosures.

Prior Period Reclassification

The amortization expense in the consolidated statements of cash flows in prior periods has been reclassified to conform with the current period presentation. The amortization expense was reclassified from "Other non-cash items" to “Depreciation and amortization” for the year ended December 31, 2023. The change did not have any impact on the net cash flow used in operating activities.

Note 3 —Risks and Liquidity

Going Concern, Liquidity and Capital Resources

MoonLake is subject to risks common to companies in the biopharmaceutical industry, and the Company believes that changes in any of the following areas could have a material adverse effect on the Company's future financial position or results of operations: ability to obtain future financing, regulatory approval and market acceptance of, and reimbursement for, product candidates, performance of third-party contract research organizations and manufacturers upon which the Company relies, protection of the Company's intellectual property, litigation or claims against the Company based on intellectual property, patent, product, regulatory, clinical or other factors, and the Company's ability to attract and retain employees necessary to support its growth.

The Company is dependent on third-party manufacturers to supply products for research and development activities in its programs and for eventual commercialization. In particular, the Company relies and expects to continue to rely on a small number of manufacturers to supply the Company with its requirements for the active pharmaceutical ingredients and formulated drugs related to these programs. These programs could be adversely affected by a significant interruption in the supply of active pharmaceutical ingredients and formulated drugs.

The Company's ability to generate revenue sufficient to achieve profitability will depend on the successful development and eventual commercialization of SLK in one or more indications, which is expected to take a number of years. The Company expects to continue to incur substantial expense and operating losses for at least the next two years as the Company continues the development of SLK and prepares for commercial launches. It is expected that operating losses will fluctuate notably from year to year depending on the timing of the Company's planned clinical development programs, efforts to achieve regulatory approval, and planned marketing and sales expenditures leading up to a commercial launch.

The Company incurred a loss of $230.3 million for the year ended December 31, 2025. As of December 31, 2025, the Company’s current assets exceeded its current liabilities by $376.2 million.

As of December 31, 2025, the Company had $334.5 million of cash and cash equivalents. Based on the Company's current operating plan and the Loan and Security Agreement as defined in Note 4 —Debt, management believes that the Company has sufficient capital to fund its operations and capital expenditures into the second half of 2027.

Note 4 –Debt

On March 31, 2025 (the “Closing Date”), MoonLake as a guarantor entered into a loan and security agreement (the “Loan and Security Agreement”) with its subsidiary, MoonLake AG, as borrower, the lenders party thereto (the “Lenders”), and Hercules Capital, Inc., as the administrative and collateral agent for itself and the Lenders. The Loan and Security Agreement provides a non-dilutive senior secured term loan facility (the “Credit Facility”) of up to an aggregate principal amount of $500.0 million. The Credit Facility matures on April 1, 2030 and bears interest at an annual rate equal to the greater of (i) prime rate as reported in The Wall Street Journal plus 1.45% and (ii)8.45%, subject to a 0.25% reduction upon achievement of the U.S. Food and Drug Administration's (“FDA”) approval of a Biologics License Application (“BLA”) for SLK.

The Credit Facility comprises:

a. A first tranche (the “Tranche 1 Loan”) in an aggregate principal amount of $75.0 million fully funded on the Closing Date,

b. Subject to MoonLake’s announcement that the VELA-1 and VELA-2 Phase 3 studies of SLK in adult patients with moderate to severe hidradenitis suppurativa each achieved their protocol-specified primary endpoint with SLK having demonstrated an acceptable safety profile (the “Tranche 2 Milestone”), a second tranche with additional term loans in an aggregate principal amount of up to $125.0 million, available on the Tranche 2 Milestone achievement date through the earlier of (i)30 days following such date and (ii) December 31, 2025,

c. Subject to MoonLake's announcement that the IZAR-1 and IZAR-2 Phase 3 studies of SLK in patients with active psoriatic arthritis each achieved their protocol-specified primary endpoint with SLK having demonstrated an acceptable safety profile (the “Tranche 3 Milestone”), a third tranche (the “Tranche 3 Loan”)

with additional term loans in an aggregate principal amount of up to $50.0 million, available on the Tranche 3 Milestone achievement date through the earlier of (i)60 days following such date and (ii) September 15, 2026,

d. Subject to the Company’s achievement of the Tranche 2 Milestone and Tranche 3 Milestone and the FDA’s acceptance of the Company’s submission of a BLA for SLK (collectively, the “Tranche 4 Milestone”), a fourth tranche with additional term loans in an aggregate principal amount of up to $50.0 million, available on the Tranche 4 Milestone achievement date through the earlier of (i)60 days following such date and (ii) March 15, 2027, and

e. Subject to approval by the Lenders’ in their discretion, a fifth tranche (the "Tranche 5 Loan") of additional term loans in an aggregate principal amount of up to $200.0 million.

On September 28, 2025, the Company announced the primary endpoint results of the VELA-1 and VELA-2 Phase 3 studies. While VELA-1 met the primary endpoint, a higher-than-expected placebo response at week 16 precluded VELA-2 from meeting the pre-specified primary endpoint and, as a result, the Company did not achieve the Tranche 2 and Tranche 4 Milestones. As of December 31, 2025, the Company had $250.0 million of remaining undrawn tranches, representing the aggregate principal amount available to be drawn under the Credit Facility.

As of December 31, 2025, the Company's carrying value of long-term debt and recognized deferred charges on the consolidated balance sheet consists of the following:

The effective interest rate is 10.41% and the Company recognized interest expense of $7.2 million on the Loan and Security Agreement for the year ended December 31, 2025. A portion of the debt issuance costs related to the undrawn third and fifth tranches were recognized as deferred charges until drawn. The debt issuance costs related to the second and fourth tranches have been recognized as interest expense in the current period.

The Company may prepay advances in whole at any time subject to a prepayment charge. Upon repayment of all term loans on or after April 1, 2027, the Company is further required to pay an additional charge equal to 6.95% for the Tranche 1 Loan and any draws under the Tranche 3 Loan;4.25% for any draw under the Tranche 5 Loan, and if repayment occurs prior to 24 months, the charge applied will be 4.25% ("End of Term Charge"). As of December 31, 2025, the End of Term Charge is accrued at 6.95% of the Tranche 1 Loan balance and is recorded at present value as an addition to the long-term debt in non-current liabilities whereas the unamortized portion is recorded as contra non-current liabilities. The unamortized contra-liability will be amortized and the present value will be accreted up to the future value over the loan term as interest expense. The Tranche 1 Loan has a maturity requirement of $75.0 million due in 2030, with no other principal payments due for each of thefive years following the date of the latest consolidated balance sheets presented. Additional fees will be payable in connection with the Credit Facility upon drawing of future tranches.

The Loan and Security Agreement allows for the Company to satisfy a portion of the cash interest payments by capitalizing such interest payments as payment-in-kind (“PIK”). No PIK interest relating to the term loan has been recorded and included in the consolidated balance sheet as of December 31, 2025.

The Loan and Security Agreement contains customary covenants, such as financial covenants and certain events of default after which loans under the Credit Facility may be due and payable immediately. The Company was in compliance with all covenants as of December 31, 2025.

All obligations under the Loan and Security Agreement will be secured on a first-priority basis, subject to certain exceptions, by security interests in substantially all assets of the Company and material subsidiaries of the Company, including its intellectual property, and will be guaranteed by material subsidiaries of the Company, including foreign subsidiaries, subject to certain exceptions.

Refer to Note 18 —Subsequent Events for further discussion on the amendment to the Loan and Security Agreement subsequent to the year ended December 31, 2025.

Note 5 —Fair Value Measurements

The following table presents information about the Company's short-term marketable debt securities measured at fair value on a recurring basis and indicate the level in the fair value hierarchy in which the Company classifies the fair value measurement:

Cash and accounts payable approximate their fair values as of December 31, 2025 and 2024, due to their short-term nature. Pension plan assets fair value is determined based on Level 2 inputs. The fair value of the long-term debt is estimated using the net present value of the payments, discounted at an interest rate that is consistent with a market interest rate, which is a Level 2 input as it is not actively traded. As of December 31, 2025, long-term debt of $74.1 million is reported at amortized cost which approximates the fair value.

Note 6 —Investments

The fair value and amortized cost of investments in short-term marketable debt securities by major security type as of December 31, 2025 and 2024 are as follows:

The following table presents the changes in fair values of the Company’s short-term marketable debt securities, classified as Level 2 financial assets, and recognized in “Accumulated other comprehensive income” for the years ended December 31, 2025, 2024 and 2023, respectively:

As of December 31, 2025, the Company’s marketable debt securities maturities are all due within one year.

Note 7 —Prepaid Expenses

Note 8 —Trade and Other Payables

Note 9 —Accrued Expenses and Other Current Liabilities

Note 10 —Leases

In August 2021, the Company entered into an open-ended office lease agreement, effective November 1, 2021, to lease approximately 2,300 square feet of space on the last two floors of the building located at Dorfstrasse 29, 6300 Zug, Switzerland. In December 2023, the contract was extended, leading to a new estimated effective duration of the lease period of 3 years, with expected expiration in January 2027.

On October 9, 2023, the Company entered into an office lease agreement, effective as of October 9, 2023, to lease approximately 3,900 square feet of office space on the fifth floor of the building located at Rua Manuel Pinto de

Azevedo 860, 4150-335, Porto, Portugal. This lease has a 3-year initial term, withtwo extendable periods of 3 years each. The Company expects to exercise the first available option and extend this lease through October 2029.

On October 13, 2023, the Company entered into an office lease agreement, effective as of October 16, 2023, to lease approximately 6,000 square feet of office space on the first floor of the building located at 95 Regent Street, CB2 1AW, Cambridge, England, United Kingdom. This lease has a 3-year term agreement and is set to expire in October 2026.

On December 12, 2023, the Company entered into an open-ended office lease agreement, effective as of January 15, 2024, to lease approximately 1,700 square feet of additional office space at its existing corporate headquarters located at Dorfstrasse 29, 6300 Zug, Switzerland. The Company estimated the duration of the lease at inception and determined a 3-year term.

On August 14, 2024, the Company entered into an office lease agreement, effective as of September 8, 2024, to lease approximately 2,000 square feet of additional office space at its existing office located at Rua Manuel Pinto de Azevedo 860, 4150-335, Porto, Portugal. This lease has a 2-year initial term, withtwo extendable periods of 3 years each. The Company currently expects that this lease will be extended until October 2029.

The weighted average remaining lease term and weighted average discount rate for the operating leases as of December 31, 2025 and 2024 were as follows:

The future minimum annual lease payments under these operating leases as of December 31, 2025 are as follows:

Operating cash outflows for amounts included in the measurement of lease liabilities were $1,555 thousand, $1,475 thousand and $422 thousand for the years ended December 31, 2025, 2024 and 2023, respectively.

The Company recorded the following lease and variable lease expenses for the years ended December 31, 2025, 2024 and 2023:

(1) Variable lease expense resulting from increased lease payments linked to changes in the reference index.

Note 11 —Employee Benefit Plans

The Company operates a defined benefit pension plan in Switzerland (“the Plan”) and a defined contribution pension plan in the United Kingdom, in accordance with local regulations and practices. As of December 31, 2025, the Plan covers the Company’s employees in Switzerland with benefits in the event of death, disability, retirement, or termination of employment.

A summary of the changes in projected benefit obligations (“PBO”) and plan assets is presented below:

Amounts recorded on the consolidated balance sheets:

Amounts recorded in "Accumulated other comprehensive income":

Weighted average assumptions used to calculate the projected benefit obligation are summarized in the table below:

Service cost of $331 thousand, $281 thousand, and $123 thousand was recognized in the net periodic benefit cost for the years ended December 31, 2025, 2024, and 2023, respectively.

The allocation of plan assets is presented below:

The fair value of plan assets is determined based on Level 2 inputs. As all members of the Plan are active, no future expected benefit payments are currently being made and are not foreseen to occur within the next ten years. For fiscal year 2026, the Company presently anticipates contributing an estimated amount of $342 thousand to fund the Plan.

Note 12 —Shareholders’ Equity

Class A Ordinary Shares

As of December 31, 2025, there were 71,373,579 Class A Ordinary Shares issued and outstanding. The Company is authorized to issue up to 500,000,000 Class A Ordinary Shares, par value $0.0001 per share. Holders of Class A Ordinary Shares are entitled toone vote for each share.

Class C Ordinary Shares

As of December 31, 2025, there wereno Class C Ordinary Shares issued and outstanding. The Company is authorized to issue up to 100,000,000 Class C Ordinary Shares, with a par value $0.0001 per share. Each Class C Ordinary Share entitles the holders thereof toone vote per share, but carries no economic rights.

At the closing of the Business Combination, MoonLake, MoonLake AG, and the ML Parties entered into a Restated and Amended Shareholders' Agreement (the “A&R Shareholders' Agreement”). With the intent to approximate the rights, obligations and restrictions that an ML Party would enjoy if it were a holder of Class A Ordinary Shares, the A&R Shareholders’ Agreement (i) imposed certain transfer and other restrictions on the ML Parties, (ii) provided for the waiver of certain statutory rights and (iii) established certain mechanics whereby MoonLake and each of the ML Parties were able to effect the conversion of MoonLake AG Common Shares and Class C Ordinary Shares into a number of Class A Ordinary Shares as defined by the Business Combination Agreement equal to 33.638698 (the "Exchange Ratio"). During the year ended December 31, 2023, pursuant to the A&R Shareholders’ Agreement,333,486 MoonLake AG Common Shares and 11,218,035 Class C Ordinary Shares were converted into 11,218,035 Class A Ordinary Shares. During the year ended December 31, 2024, pursuant to the A&R Shareholders’ Agreement,48,972 MoonLake AG Common Shares and 1,647,354 Class C Ordinary Shares were converted into 1,647,354 Class A Ordinary Shares. During the year ended December 31, 2025, pursuant to the A&R Shareholders’ Agreement,25,009 MoonLake AG Common Shares and 841,269 Class C Ordinary Shares were converted into 841,269 Class A Ordinary Shares. As of December 31, 2025, all remaining issued and outstanding Class C Ordinary Shares had been converted into Class A Ordinary Shares. The A&R Shareholders' Agreement automatically terminated with the last conversion on December 19, 2025. The foregoing description of the A&R Shareholders’ Agreement is not complete and is qualified in its entirety by reference to, and should be read in connection with, the full text of the A&R Shareholders’ Agreement filed as an exhibit on the Company's Current Report on Form 8-K filed with the SEC on April 11, 2022.

Equity Offerings

At-the-Market Offering

On May 11, 2023, the Company entered into a Sales Agreement (the “May 2023 Sales Agreement”) with Leerink Partners LLC (formerly known as SVB Securities LLC) (“Leerink Partners”), through which the Company could issue and sell up to $200.0 million of its Class A Ordinary Shares (the “May 2023 ATM Shares”), through Leerink Partners as its sales agent. The May 2023 ATM Shares to be sold under the May 2023 Sales Agreement, if any, would be issued and sold pursuant to the Company's shelf registration statement on Form S-3 (File No. 333-271546), which was declared effective by the SEC on May 9, 2023, and a prospectus supplement thereto filed with the SEC on May 11, 2023.

On June 27, 2023, the Company reduced the maximum aggregate offering amount of its Class A Ordinary Shares that could be issued and sold under the May 2023 Sales Agreement to $0 and no longer intends to sell Class A Ordinary Shares under the May 2023 Sales Agreement unless the Company files a further prospectus supplement indicating an amount of shares proposed to be sold.

On August 31, 2023, the Company entered into a Sales Agreement with Leerink Partners (the “August 2023 Sales Agreement” and, together with the May 2023 Sales Agreement, the “Sales Agreements”), through which the Company could issue and sell up to $350.0 million of its Class A Ordinary Shares (the “August 2023 ATM Shares”), through Leerink Partners as its sales agent. The August 2023 ATM Shares to be sold under the August 2023 Sales Agreement, if any, would be issued and sold pursuant to the Company’s shelf registration statement on Form S-3 (File No. 333-274286), which was declared effective by the SEC on September 11, 2023, and a prospectus supplement thereto filed with the SEC on August 31, 2023. As of December 31, 2025, there was $265.0 million remaining for future sales under the August 2023 ATM Sales Agreement.

For the year ended December 31, 2024, the Company sold 914,828 Class A Ordinary Shares through the Sales Agreements for net proceeds of $52.5 million after deducting sales agent's commissions and transaction costs. For the three months and year ended December 31, 2025, there were no sales under the August 2023 Sales Agreement.

Public Offerings of Class A Ordinary Shares

On June 27, 2023, the Company entered into an underwriting agreement with Leerink Partners and Guggenheim Securities LLC as the representatives of the underwriters named therein, to issue and sell 8,000,000 Class A Ordinary Shares at a public offering price of $50.00 per share (the “2023 Offering”). In addition, the Company granted the underwriters an option for a period of 30 days to purchase up to an additional 1,200,000 Class A Ordinary Shares at the public offering price less the underwriting discounts and commissions (the “Option”), and such Option was exercised in full by the underwriters. The 2023 Offering closed on June 30, 2023, and net proceeds, including proceeds from the exercise in full by the underwriters of the Option, were $436.7 million, after deducting the underwriting discounts, commissions, and offering expenses in the amount of $23.3 million.

Following the completion of the 2023 Offering, the Company opted to direct a substantial portion of the net proceeds to MoonLake AG. This was executed as a two-step process: (i) the Company acquired the remaining 22,756 MoonLake AG Common Shares held in treasury through a share purchase and assignment agreement formally executed on July 09, 2023 ($38.9 million) and (ii) the Company contributed additional funds to MoonLake AG’s capital reserves through a cash contribution agreement formally executed on July 10, 2023 ($275 million). A stamp duty tax of $2.8 million was levied on the aforementioned capital contribution which the Company has classified as cash flows from financing activities in order to correctly mirror the underlying nature of the transaction.

On March 8, 2024, the Company executed a similar transaction as a two-step process: (i) the Company acquired 501 MoonLake AG Common Shares held in treasury through a share purchase and assignment agreement ($0.8 million) and (ii) the Company contributed an additional $150.0 million of funds to MoonLake AG's capital reserves through a cash contribution. A stamp duty tax of $1.5 million, net of refund received, was levied on the capital contribution which the Company has classified as cash flows from financing activities in order to correctly mirror the underlying nature of the transaction. The aforementioned increase in treasury shares occurred during the three months ended March 31, 2024 as a result of an employee termination entitling MoonLake AG to repurchase such employee's unvested shares (501 MoonLake AG Common Shares and 16,853 Class C Ordinary Shares) previously awarded as part of a share-based compensation program. Since the shares were subsequently sold to MoonLake, the corresponding Class C Ordinary Shares were canceled.

On November 5, 2025, the Company entered into an underwriting agreement with Leerink Partners as the underwriter, to issue and sell 7,142,857 Class A Ordinary Shares at a public offering price of$10.50 per share (the “2025 Offering”). The 2025 Offering closed on November 6, 2025, and net proceeds were $72.4 million, after deducting the underwriting discounts, commissions, and offering expenses in the amount of$2.6 million.

Options Exercised under the Equity Incentive Plan

In the years ended December 31, 2025 and 2024, certain participants exercised their stock options under the Equity Incentive Plan (as defined below in Note 14 —Share-Based Compensation) for an aggregate of 27,149 and 48,796 Class A Ordinary Shares and total cash consideration of $480 thousand and $242 thousand, respectively.

There wereno options exercised in the year ended December 31, 2023.

Note 13 —Net Loss per Share

The following table sets forth the net loss per share calculations for the years ended December 31, 2025, 2024, and 2023:

There were 2,348,038,972,476, and 312,400 common stock equivalents outstanding in the form of stock options and restricted stock awards under the Equity Incentive Plan (as defined below in Note 14 —Share-Based Compensation) as of December 31, 2025, 2024, and 2023, respectively, that have been excluded from the calculation of net loss per share – diluted as their effect would be anti-dilutive.

Class C Ordinary Shares have been excluded from the weighted average number of outstanding shares used to calculate the net loss per share – basic and diluted as they do not carry economic rights.

Note 14 —Share-Based Compensation

As of December 31, 2025, the Company had the following share-based compensation arrangements:

a. Restricted Founder Shares (as defined below) – created in April 2021 by MoonLake AG (fully vested as of April 2023);

b. The Employee Share Participation Plan (“ESPP”) – created in July 2021 by MoonLake AG;

c. The Employee Stock Option Plan (“ESOP”) – created in July 2021 by MoonLake AG (fully vested as of January 2024);

d. MoonLake Immunotherapeutics 2022 Equity Incentive Plan ("Equity Incentive Plan") – created in April 2022 by MoonLake.

The purpose of the arrangements is to attract and retain the best available personnel and to provide participants with additional incentive to increase their efforts on behalf and in the best interest of the Company and its subsidiaries. The reference to “Common Shares” refers to shares in MoonLake AG.

MoonLake AG's compensation plans are settled with its Common Shares and with a number of Class C Ordinary Shares of the Company, determined by multiplying the number of Common Shares by the Exchange Ratio. The owners of

Common Shares have the right to exchange their Common Shares for a number of Class A Ordinary Shares derived using the Exchange Ratio. In the event MoonLake AG shareholders elect to exchange their Common Shares, such MoonLake AG shareholder forfeits a number of Class C Ordinary Shares equal to the number of Class A Ordinary Shares issued (refer to Note 12 — Shareholders’ Equity -Class C Ordinary Shares).

As of January 1, 2024, the Company executed the conversion of the majority of the outstanding ESOP awards into an equivalent number of Equity Incentive Plan option awards that are settled with Class A Ordinary Shares, thereby eliminating the intermediary right to the exchange step noted above. From an accounting perspective, there is no underlying modification to the economic, control or legal rights of the awards, including vesting terms and conditions, exercise price and accounting classification. This is purely an administrative change as opposed to an accounting modification whereby the plan issuer is amended from MoonLake AG to MoonLake Immunotherapeutics. Consequently, there is no incremental fair value generated following the conversion and therefore no incremental expense recorded. Any remaining unvested compensation expense will be recorded over the remaining vesting period of the original awards, thereby resulting in no change to the consolidated financial statements if the conversion had not occurred.

As a result of this administrative conversion, thetwo plans which remain active as of December 31, 2025 are the ESPP and Equity Incentive Plan, whereas the Restricted Founder Shares and ESOP are fully vested as of April 2023 and January 2024, respectively.

For the years ended December 31, 2025, 2024, and 2023, the Company has recognized an increase in equity in the consolidated balance sheets due to share-based compensation expense in the consolidated statements of operations and comprehensive loss of $12.9 million, $7.3 million, and $7.1 million, respectively. The share-based compensation expense was mainly driven by the aforementionedtwo active share-based compensation plans and programs:

The Company expects that all future employee awards will be made under the Equity Incentive Plan. As of December 31, 2025,1,836,618 Class A Ordinary Shares from the authorized pool of 4,353,948 Class A Ordinary Shares remain available for future grants, and 2,156,512 Class A Ordinary Shares are reserved for issuance upon exercise of stock options granted under the Equity Incentive Plan.

Restricted Founder Shares 2021-2023 - MoonLake AG

On April 28, 2021, the shareholders’ agreement between the co-founders, the Series A investors and MoonLake AG imposed a reverse vesting condition on 90% of the total 110,000 Common Shares (the equivalent of 3,700,257 Class C Ordinary Shares) held by each of thethree co-founders. Therefore,99,000 Common Shares (the equivalent of 3,330,231

Class C Ordinary Shares) held by each of the co-founders were subject to these restrictions and considered unvested (the “Restricted Founder Shares”). The Restricted Founder Shares vested on the 28th of each month at a rate of 4.166% over a period oftwo years until April 28, 2023. In the event of a termination of the contractual relationship of the relevant co-founder before the end of the vesting period, MoonLake AG in first priority, or any third-party designated by it, and the other shareholders in second priority pro rata to their shareholdings, had an option to purchase all or a pro rata portion of the leaver shares that remained unvested on the effective day of the termination at nominal value of CHF 0.10.

Employee Share Participation Plan 2021-2026 - MoonLake AG

The ESPP grants will vest 25% on each anniversary of the grant date. In the event of a termination of contractual relationship between the Company and the entitled employee, the awards can be deemed forfeited by MoonLake AG if certain conditions are met. Awards feature an accelerated vesting condition linked to a “Change of Control”, defined as any transfer of shares that results in the proposed acquirer holding more than 50% of the then issued share capital of MoonLake AG or the Company, as the case may be, where all the outstanding awards (whether currently outstanding or granted in the future) will be deemed fully vested.

As of December 31, 2025, MoonLake AG had $0.1 million of total unrecognized compensation expense related to the ESPP that will be recognized over the weighted average period of 0.05 years. All ESPP awards, including those unvested, have been converted to Class A Ordinary Shares.

Employee Stock Option Plan 2021-2025 - MoonLake AG

The ESOP grants vested 25% on each anniversary of the grant date. In the event of a termination of the contractual relationship between the Company and the entitled employee, options could be forfeited by MoonLake AG if certain conditions were met. The awards featured an accelerated vesting condition linked to a “Change of Control”, defined as any transfer of shares that resulted in the proposed acquirer holding more than 50% of the then issued share capital of MoonLake AG or the Company, as the case may be, where all the outstanding awards (whether currently outstanding or granted in the future) would have been deemed fully vested.

MoonLake Immunotherapeutics 2022 Equity Incentive Plan

On April 5, 2022 (the “Effective Date”), the Company created the Equity Incentive Plan to promote and closely align the interests of employees, officers, non-employee directors and other service providers of MoonLake Immunotherapeutics and its shareholders by providing share-based compensation and other performance-based compensation.

The Equity Incentive Plan provides for the grant of options, stock appreciation rights, restricted stock units, restricted stock, and other share-based awards and for incentive bonuses, which may be paid in cash, Common Shares or a combination thereof, as determined by the compensation committee of the board of directors or such other committee as designated by the board of directors to administer the Equity Incentive Plan. The Equity Incentive Plan shall remain available for the grant of awards until the 10 th anniversary of the Effective Date.

The aggregate intrinsic value represents the difference between the exercise price and the selling price received by option holders upon the exercise of stock options during the period.

The total intrinsic value of options exercised was $0.9 million and $2.3 million for the years ended December 31, 2025 and 2024, respectively. No options were exercised for the year ended December 31, 2023.

As of December 31, 2025, the Company had $23.6 million of total unrecognized compensation expense related to options under the Equity Incentive Plan that will be recognized over the weighted average period of 2.58 years.

As of December 31, 2025, the Company had $6.3 million of total unrecognized compensation expense related to restricted stock awards under the Equity Incentive Plan that will be recognized over the weighted average period of 3.17 years.

Note 15 —Income Taxes

The Company's effective tax rate (“ETR”) was (0.3)%, (0.2)%, and (0.3)% for the years ended December 31, 2025, 2024, and 2023, respectively. The Company is not aware of any items that would cause the quarterly or period-to-date ETR to be significantly different from the Company's annual ETR. The difference between the income tax provision that would be derived by applying the statutory rate to the Company's loss before income taxes and the income tax provision recorded was primarily attributable to the change in the valuation allowance. The Company continues to incur losses for the Cayman Island and Swiss entity and its ability to utilize the deferred tax asset related to the tax losses is not considered more likely than not.

The Company's main operating affiliate, MoonLake AG, is subject to taxation in the Canton of Zug, Switzerland. For the years ended December 31, 2025, 2024, and 2023, the Company did not incur any significant income tax expense or benefit, as the Company incurred tax losses and provided a full valuation allowance.

The components of loss before income tax were as follows:

The reconciliation of taxes at the federal statutory rate to the Company’s provision for income taxes is as follows:

Below is a tabular rate reconciliation previously disclosed for the years ended December 31, 2024 and 2023:

Significant components of the Company’s deferred tax assets (liabilities) were:

As of December 31, 2025, the Company’s net deferred tax assets before valuation allowance were $51.7 million. In assessing the realizability of its deferred tax assets, the Company considers whether it is more likely than not that some portion or all of its deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. The Company considers the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies in making this assessment. Based on the weight of all evidence, the Company has determined that it is not more likely than not that the net deferred tax assets will be realized. Therefore, a valuation allowance of $51.7 million has been recorded against the deferred tax assets.

As of December 31, 2025, MoonLake AG had net operating losses of approximately $403.5 million of which $12.6 million will expire in 2028, $44.0 million will expire in 2029, $115.3 million will expire in 2031, and $231.6 million will expire in 2032.

The Company’s net operating losses will not be subject to any limitation due to change in ownership according to Swiss Income Tax Law.

The Company has no unrecognized tax benefits and does not expect that uncertain tax benefits will change significantly in the next twelve months.

Cash paid for income taxes, net of refunds, during the year ended December 31, 2025 was $799 thousand, of which, $598 thousand was paid to the United Kingdom and $201 thousand was paid to Portugal.

Cash paid for income taxes, net of refunds, during the year ended December 31, 2024 and 2023 was $147 thousand and $42 thousand, respectively.

Note 16 —Commitments and Contingencies

Commitments

The Company has entered into agreements as of December 31, 2025 primarily regarding the clinical and non-clinical development services with contract research organizations (“CROs”), as well as supply and logistics services with contract manufacturing organizations, for the advancement of SLK. As of December 31, 2025, the total committed expense under these agreements amounted to $204.9 million.

The Company's In-License Agreement with MHKDG includes contractual milestone payments related to the achievement of pre-specified research, development, regulatory and commercialization events and indemnification provisions, which are common in such agreements. Pursuant to the agreements, the Company is obligated to make research and development and regulatory milestone payments upon the occurrence of certain events. Subject to the terms of the license, additional milestone payments of up to €299.6 million ($351.7 million using a December 31, 2025 exchange rate) are potentially payable upon satisfying specific milestones related to regulatory filing acceptance, first commercial sales, and aggregate annual net sales. The milestone payments are payable in cash. Milestone payments due prior to obtaining regulatory approval will be recorded as research and development expense upon determination that a milestone payment is probable to occur. Milestone payments due after obtaining regulatory approval will be capitalized when and if incurred. The Company will use commercially reasonable efforts to cause the milestones to occur. However, if the Company reasonably determines that a technical failure or commercial failure has occurred with respect to all or a part of the SLK Program, the Company, at its sole discretion, can terminate all or part of the SLK Program. As of December 31, 2025, the Company made a total of €7.5 million ($8.1 million using the then applicable exchange rate) in additional milestone payments.

In addition, on May 12, 2023, MoonLake AG entered into an agreement with Research Cooperation Technologies, Inc. (“RCT”) and MHKDG, effective as of June 1, 2023, pursuant to which the Company was granted a royalty-bearing, nonexclusive, sublicensable right and license under RCT’s patents and know-how related to a manufacturing process using an underlying yeast strain, Pichia pastoris, to develop, manufacture, use, sell, offer for sale, and import and otherwise commercialize SLK on a world-wide basis, subject to certain restrictions. This agreement replaces the Company’s sublicense for similar rights under the In-License Agreement. In the aggregate, the Company is required to pay royalties within the range of low to mid-teen percent of net sales under the aforementioned agreements with MHKDG and RCT.

Royalties will be recognized in the consolidated statements of operations and comprehensive loss when net sales are recognized.

Note 17 —Segment Information

The Company operates as a single operating segment, focusing exclusively on the research, development, and eventual commercialization of its product. As the entire Company is centered around these activities, all consolidated parts of the Company are reviewed and analyzed as part ofone segment.

As of December 31, 2025, the Company's single operating segment had not generated revenue from any programs or services. The accounting policies of the segment are the same as those described in the Note 2 —Basis of Presentation and Significant Accounting Policies section. The measure of segment assets is reported on the consolidated balance sheets as total assets. The measure of segment profit or loss is reported on the consolidated statement of operations and comprehensive loss as net loss. The CODM uses this as a starting point alongside significant non-cash items and working capital changes to evaluate cash burn and determine financial sustainability, cost management patterns and overall business viability as the clinical trials progress. The CODM also uses this to manage operations and ensure the most efficient use of Company resources against current budgets, alignment with strategic goals and preparation of future forecasts.

Significant Segment Expenses

The measure of significant segment expenses is reported in the accompanying consolidated statements of operations and comprehensive loss as "Research and development" and "General and administrative" for the years ended December 31, 2025, 2024, and 2023, respectively.

Non-cash share-based compensation is reported in Note 14 —Share-Based Compensation for the years ended December 31, 2025, 2024, and 2023. Non-cash depreciation and amortization for the years ended December 31, 2025, 2024, and 2023 was $2.6 million, $1.4 million, and $0.4 million, respectively.

Geographical Data

Long-lived assets, consisting of property and equipment, net, and operating lease right-of-use assets by geographical area as of December 31, 2025 and 2024 are as follows:

Note 18 —Subsequent Events

The Company has evaluated events subsequent to the balance sheet date through the date the financial statements were issued and determined that the following subsequent event requires disclosure in the financial statements.

On February 20, 2026 (the “Amendment Date”), the Company executed a first amendment to the Loan and Security Agreement (the “Amendment”), pursuant to which the parties agreed to, among other things, revise available tranches, milestone dates, and financial covenants, resulting in $25.0 million drawn as a second tranche upon execution of the Amendment, and up to $400.0 million remaining available as future tranches.

Additional information about the Amendment is set forth in the Company's Current Report on Form 8-K filed with the U.S. Securities and Exchange Commission on February 23, 2026.