2. Summary of Significant Accounting Policies

Basis of Presentation

The unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and the applicable rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). The accompanying unaudited condensed consolidated financial statements include all of the accounts of the Company and its subsidiaries, Abpro Corporation and AbMed Corporation (“AbMed”). All intercompany balances and transactions have been eliminated in consolidation.

Certain prior period amounts have been reclassified to conform to the current year presentation, including the reclassification of amounts in the balance sheet for prepaid expenses and other current assets and notes payable with respect to the insurance premium financing agreement (see Note 9), with no material impact on the condensed consolidated financial statements. 

Use of Estimates

The preparation of the condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and judgments that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Significant estimates in these condensed consolidated financial statements include share-based compensation expense, fair value of warrants, pre-clinical and clinical accrued expenses, valuation and realizability of deferred tax assets and the ability to continue as a going concern. On an ongoing basis, the Company evaluates its estimates, judgments, and methodologies. The Company bases its estimates on historical experience and on various other assumptions believed to be reasonable. Due to the inherent uncertainty involved in making estimates, actual results could differ materially from those estimates.

Unaudited Interim Condensed Consolidated Financial Statements

The accompanying interim condensed consolidated financial statements and the related footnote disclosures are unaudited. These unaudited interim financial statements have been prepared on the same basis as the audited financial statements, and in management’s opinion, include all adjustments, consisting of only normal recurring adjustments, necessary for the fair statement of the Company’s financial position as of March 31, 2026 and its results of operations and cash flows for the three months ended March 31, 2026 and 2025. The results of operations for the three months ended March 31, 2026 are not necessarily indicative of the results to be expected for the year ended December 31, 2026 or any other period. The December 31, 2025 year-end condensed consolidated balance sheet was derived from audited annual financial statements but does not include all disclosures from the annual financial statements.

Certain information and footnote disclosures normally included in consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to the rules and regulations of the SEC. Accordingly, these condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2025 and the related notes included in the Company’s Annual Report on Form 10-K, filed with the SEC on April 15, 2026 (the “Annual Report”), which provides a more complete discussion of the Company’s accounting policies and certain other information.

There have been no significant changes to the significant accounting policies disclosed in Note 2 of the audited consolidated financial statements as of and for the year ended December 31, 2025 included in the Company’s Annual Report.

Segment Reporting

ASC Topic No. 280, Segment Reporting (“ASC 280”), establishes standards for the way that public business entities report information about operating segments in their annual consolidated financial statements and requires that those entities report selected information about operating segments in interim financial reports. ASC 280 also establishes standards for related disclosures about products and services, geographic areas and major customers. The Company’s business segments are based on the organization structure used by the chief operating decision maker (“CODM”) for making operating and investment decisions and for assessing performance.

In accordance with ASC 280, the Company has determined that it operates as a single reportable segment, which is the business of development of novel antibodies, primarily in the areas of immuno-oncology, ophthalmology and infectious disease. The financial results of the Company’s operations are managed and reported to the Chief Executive Officer, who is considered the Company’s CODM, on a consolidated basis. The CODM assesses performance and allocates resources based on the Company’s consolidated statements of operations, and key components and processes of the Company’s operations are managed centrally. Segment asset information is not used by the CODM to allocate resources. The Chief Executive Officer uses operating losses and cash flows from operating activities to evaluate performance of the operating segment assets in deciding how to allocate the cash resources. Significant expenses presented to the CODM include research and development expenses, general and administrative expenses, and interest expenses, which are each separately presented on the Company’s condensed consolidated statements of operations.

Net Loss Per Share

Basic net loss per share attributable to common stockholders is computed by dividing net loss attributable to common stockholders by the weighted-average number of common stock shares outstanding during the period without consideration of potentially dilutive common stock. Diluted net loss per share attributable to common stockholders reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the Company unless the inclusion of such shares would be anti-dilutive. As the Company has incurred losses for the three months ended March 31, 2026 and 2025, basic and diluted net losses per share are the same for all periods presented.

The following table presents the potentially dilutive shares that were excluded from the computation of diluted net loss per share of common stock attributable to common stockholders, because their effect was anti-dilutive:

Recently Issued Accounting Pronouncements

On November 4, 2024, the FASB issued ASU 2024-03, Accounting Standards Update 2024-03, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses to improve financial reporting by requiring that public business entities disclose additional information about specific expense categories in the notes to financial statements at interim and annual reporting periods. The amendments in this ASU do not change or remove current expense disclosure requirements; however, the amendments affect where such information appears in the notes to financial statements because entities are required to include certain current disclosures in the same tabular format disclosure as the other disaggregation requirements in the amendments. This ASU is effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. Early adoption is permitted. The Company is currently evaluating the potential impact that the adoption of this standard will have on its financial statements.

Management does not believe that any additional recently issued, but not yet effective, accounting standards, if currently adopted, would have a material impact on the Company’s financial statements.