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Summary of Significant Accounting Policies (Policies)
 12 Months Ended
Dec. 31, 2025
Accounting Policies [Abstract]  
Basis of Presentation and Principles of Consolidation

(a) Basis of Presentation and Principles of Consolidation

The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) and include the accounts of MiNK and its subsidiaries. All significant intercompany transactions and accounts have been eliminated in consolidation.

In the year ended December 31, 2024, the Company deconsolidated a foreign subsidiary and recognized a gain of approximately $185,000, included in "Other income, net" on its consolidated statements of operations and comprehensive loss.

On January 17, 2025, MiNK executed a reverse stock split of its issued and outstanding common stock, par value $0.00001, at a ratio of 1-for-10 with a record date of January 28, 2025 (the “Reverse Stock Split”). All common share, per share and related information included in the accompanying financial statements and footnote disclosures have been adjusted retroactively, where applicable, to reflect the Reverse Stock Split. See Note 7 for further details.
Segment Information

(b) Segment Information

MiNK is managed and operated as one business segment. The Company does not operate separate lines of business with respect to any of its product candidates or geographic locations. Accordingly, the Company does not prepare discrete financial information with respect to separate product areas or by location and does not have separately reportable segments as defined by Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 280, Segment Reporting.

Use of Estimates

(c) Use of Estimates

The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles requires the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. The Company bases those estimates on historical experience and on various assumptions that are believed to be reasonable under the circumstances. Actual results could differ from those estimates.

Cash and Cash Equivalents

(d) Cash and Cash Equivalents

The Company considers all highly liquid investments purchased with maturities at acquisition of three months or less to be cash equivalents. Cash equivalents consist primarily of money market funds.
Equipment

(e) Equipment

Equipment is carried at cost. Depreciation is computed using the straight-line method over the estimated useful lives of the assets, typically 4-10 years. Additions are capitalized, while repairs and maintenance are charged to expense as incurred. Depreciation expense was $182,000 and $215,000, for the years ended December 31, 2025 and 2024, respectively.

Fair Value Measurements

(f) Fair Value Measurements

Certain assets and liabilities are carried at fair value under GAAP. 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 must maximize the use of observable inputs and minimize the use of unobservable inputs. Financial assets and liabilities carried at fair value are to be classified and disclosed in one of the following three levels of the fair value hierarchy, of which the first two are considered observable and the last is considered unobservable:

•
Level 1—Quoted prices in active markets for identical assets or liabilities.
•
Level 2—Observable inputs (other than Level 1 quoted prices), such as quoted prices in active markets for similar assets or liabilities, quoted prices in markets that are not active for identical or similar assets or liabilities, or other inputs that are observable or can be corroborated by observable market data.
•
Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to determining the fair value of the assets or liabilities, including pricing models, discounted cash flow methodologies and similar techniques.

The Company’s cash and cash equivalents are carried at fair value (a Level 1 measurement), determined according to the fair value hierarchy described above. The carrying values of the Company’s, accounts payable and accrued expenses approximate their fair values due to the short-term nature of these liabilities.

Fair Value Option

(g) Fair Value Option

Under the Fair Value Option subsection of Accounting Standards Codification Subtopic 825-10, Financial Instruments – Overall, the Company has the irrevocable option to report most financial assets and liabilities at fair value on an instrument-by-instrument basis with changes in fair value reported in earnings. The Company has elected to report the related party note it issued to Agenus Inc. ("Agenus") on February 12, 2024, under the Convertible Promissory Note Purchase Agreement (the “Purchase Agreement” or “Note”) at fair value. The fair value of the Note is determined on a scenario based present value methodology. The outstanding principal amount of the Note was $5.0 million at December 31, 2025.
Foreign Currency Transactions

(h) Foreign Currency Transactions

Gains and losses from the Company’s foreign currency-based accounts and transactions, such as those resulting from the remeasurement and settlement of receivables and payables denominated in foreign currencies, are included in the consolidated statements of operations within other income (expense). The Company recorded de minimis foreign currency losses for the years ended December 31, 2025 and 2024.

Research and Development

(i) Research and Development

Research and development expenses include the costs associated with the Company’s internal research and development activities, including salaries and benefits, share-based compensation, occupancy costs, clinical manufacturing costs, related administrative costs and research and development conducted for the Company by outside advisors. Research and development expenses also include the cost of clinical trial materials shipped to the Company’s research partners. Research and development costs are expensed as incurred.

Share-Based Compensation

(j) Share-Based Compensation

MiNK accounts for share-based compensation in accordance with the provisions of ASC 718, Compensation—Stock Compensation. Share-based compensation expense is recognized based on the estimated grant date fair value. Compensation cost is recognized on a straight-line basis over the requisite service period of the award. Forfeitures are recognized as they occur. See Note 8 for further discussion on share-based compensation.

Income Taxes

(k) Income Taxes

Income taxes are accounted for under the asset and liability method with deferred tax assets and liabilities recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis and net operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which such items are expected to be reversed or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the consolidated statement of operations in the period that includes the enactment date. Deferred tax assets are recognized when they are more likely than not expected to be realized.

Net Loss Per Share

(l) Net Loss Per Share

Basic income or loss per common share is calculated by dividing the net loss attributable to common stockholders by the weighted average number of common shares outstanding. Diluted income per common share is calculated by dividing net income attributable to common stockholders by the weighted average number of common shares outstanding plus the dilutive effect of outstanding instruments such as stock options. Because the Company reported a net loss attributable to common stockholders for all periods presented, diluted loss per common share is the same as basic loss per common share, as the effect of utilizing the fully diluted share count would have reduced the net loss per common share. Therefore, the following potentially dilutive securities have been excluded from the computation of diluted weighted average shares outstanding as of December 31, 2025 and 2024, as they would be anti-dilutive:

 

2025

 

 

2024

 

Stock options

 

 

876,533

 

 

 

895,002

 

Nonvested shares

 

 

77,866

 

 

 

80,646

 
Recent Accounting Pronouncements

(m) Recent Accounting Pronouncements

Recently Issued, Not Yet Adopted

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. ASU 2023-09 requires incremental annual disclosures around income tax rate reconciliations, income taxes paid and other related disclosures. As the Company is an Emerging growth company ("EGC"), ASU 2023-09 is effective for fiscal years beginning after December 15, 2025. Early adoption is permitted for any annual periods for which financial statements have not been issued or made available for issuance. The Company is currently evaluating the impact that ASU 2023-09 will have on the notes to its consolidated financial statements.

In November 2024, the FASB issued ASU 2024-03, Disaggregation of Income Statement Expenses (DISE). This new guidance requires all public entities to incorporate disclosures about specific types of expenses included in the expense captions presented on the face of the income statement as well as disclosures about selling expenses. Public entities must adopt ASU 2024-03 prospectively

for fiscal years beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. Early adoption and retrospective application are permitted. The Company is currently evaluating the impact that ASU 2024-03 will have on its consolidated financial statements.

No other new accounting pronouncement issued or effective during the year ended December 31, 2025 had or is expected to have a material impact on the Company’s consolidated financial statements or disclosures.