Question · Q3 2025
David Westenberg questioned the sufficiency of BillionToOne's clinical spending in oncology compared to competitors and whether larger studies (e.g., OS/DFS) are needed. He also asked about the mix between monitoring and therapy selection tests per patient and the likelihood of physicians using a competitor's test alongside BillionToOne's.
Answer
Oguzhan Atay, Co-founder and CEO, stated that while finding more mutations is conclusive for therapy selection, physicians don't typically question its impact on outcomes, making OS/DFS studies less critical there. However, he acknowledged the need for more investment in larger studies for newer areas like response monitoring and MRD. Atay noted a roughly two-to-one ratio of Response to Select tests, with 95% of providers using both, making it rare for a physician to use only one or mix with a competitor.
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