. Segment Reporting

The Company operates as one operating segment, focused on research, development, and discovering, developing and delivering therapies for its novel biologics. The Company’s CEO, as the chief operating decision maker ("CODM"), manages and allocates resources to the operations of the Company on a consolidated basis. Managing and allocating resources on a total-company basis enables the CODM to assess the overall level of resources available and how to best deploy those resources across research and development projects that are in line with our long-term company-wide strategic goals. Consistent with this decision-making process, the Company’s CODM uses consolidated, single-segment financial information for purposes of evaluating performance, forecasting future period financial results, allocating resources and setting incentive targets. When evaluating the Company’s overall performance, the CODM is focused on the timing and progress of its preclinical and clinical development activities. The CODM regularly reviews total expenses, as well as direct research and development expenses by program and makes decisions using this information on a company-wide basis.

The accounting policies of the reportable segment are the same as those described in the summary of significant accounting policies. The CODM assesses performance and decides how to allocate resources based on consolidated net loss. This measure is

used to monitor budget versus actual results to assess performance of the segment. The measure of segment assets is reported on the consolidated balance sheet as total consolidated assets.

The following table presents reportable segment net loss, including significant expenses regularly provided to the CODM, attributable to the Company’s reportable segment for the years ended December 31, 2024 and 2023:

 

 

Years Ended December 31,

 

 

2024

 

 

2023

 

 

(in thousands)

 

Direct research and development expense by program:

 

 

 

 

 

 

Bempikibart

 

$

28,726

 

 

$

11,722

 

ADX-097

 

 

5,253

 

 

 

7,185

 

Discovery and other

 

 

856

 

 

 

894

 

Personnel-related costs (excluding stock-based compensation)

 

 

16,122

 

 

 

13,166

 

Other G&A expenses

 

 

9,586

 

 

 

5,824

 

Interest (income) expense, net

 

 

(2,832

)

 

 

(693

)

Other segment items (1)

 

 

(9,978

)

 

 

15,645

 

Total segment net loss

 

$

47,733

 

 

$

53,743

 

 

(1) Other segment items are included in order to reconcile to total segment net loss. Other segment items include non-cash items such as depreciation and amortization expense and stock-based compensation expense, gains and losses on the change in fair value of convertible notes, change in fair value of contingent value rights and loss from equity method investment. In 2023, other segment items also includes the reversal of collaboration arrangement revenue related to the termination of the Horizon Agreement (see Note 15).

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About Segments Disclosures

Segment disclosures break a company into its reportable operating units, revealing revenue, profit, and asset allocation that consolidated financial statements obscure. Under ASC 280, segments must match how the chief operating decision maker views the business, providing a window into internal management structure and resource allocation priorities.

Key signals: compare segment margins to identify which units drive profitability and which destroy value. Watch for changes in the number of reportable segments — segment aggregation or disaggregation often coincides with strategic shifts or attempts to obscure declining performance. Intersegment elimination patterns reveal internal pricing practices. The reconciliation between segment totals and consolidated figures exposes corporate overhead allocation and unallocated items. Geographic revenue concentration highlights regulatory and currency exposure. Compare segment-level capital expenditure against segment revenue to assess where management is investing for future growth versus harvesting existing assets.