SEGMENT REPORTING
Operating segments are defined as components of an entity for which separate financial information is available and that is regularly reviewed by the Chief Operating Decision Maker (CODM) in deciding how to allocate resources to an individual segment and in assessing performance. The Company operates as a single reporting segment, focused on the development of MasterKey therapies that target families of oncogenic mutations in patients with cancer.
The Company’s measure of segment profit or loss is net income (loss). The CODM is the chief executive officer (CEO). The CODM manages and allocates resources to the operations of the Company on a total company basis. Managing and allocating resources on a consolidated basis enables the CEO to assess the overall level of resources available and how to best deploy these resources across functions and development projects that are in line with the Company’s strategic goals. Consistent with this decision-making process, the CEO uses consolidated financial information for purposes of evaluating performance, forecasting future period financial results, allocating resources and setting incentive targets. Segment net income (loss) is used to monitor budget versus actual results and in assessing performance of the segment.
The following table is a reconciliation of the significant expense categories to segment net income (loss) regularly provided to the CODM when managing the Company’s single reporting segment:

Year Ended December 31,

2025

2024

(in thousands)
License revenue$70,000 $— 
Program expenses:
Silevertinib (NSCLC) research and development expenses$17,469 $24,378 
Silevertinib (GBM) research and development expenses138 — 
BDTX-4933 research and development expenses1,018 4,613 
Other research programs and development expenses1
1,500 2,515 
Non-program expenses2
12,035 14,670 
Personnel-related expenses11,015 21,978 
Other segment items3
4,458 1,522 
Segment net income (loss)$22,367 $(69,676)
(1) Includes cross-program consulting expenses; (2) Includes facilities, information technology, legal, intellectual property, and other general and administrative expense; (3) Includes stock-based compensation expense, depreciation, sublease income, investment accretion, interest income, impairment gain/loss, and other (income) expense.
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Historical Timeline

Fiscal YearFiled
2025Mar 16, 2026Showing above
2024Mar 6, 2025

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.