Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Signal history
Explore the full record of transactions filed by Tsao David. Director active across 1 company, notably BillionToOne, Inc.. In total, 30 filings have been logged. Split: 0 buy · 23 sells. Total volume traded: €3.9m. History available since 13 July 2026. The latest transaction was disclosed on 25 August 2026 (Levée d'options). Regulator: SEC (Form 4). All data is accessible without signup.
Companies and markets linked to Tsao David
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1,000 sharesClass A Common StockSEC:0002087127-26-000002:8
25 of 30 declarations
About Tsao David
Tsao David is a declarant linked to BillionToOne, Inc. (XNAS), where the listed role is Chief Technology Officer. He has 26 filings in total, and across the 26 sampled filings between 2025-11-12 and 2026-07-15, the transactions are sales for a total of EUR 2191480, with several sales on 2026-07-15 for EUR 423156.8493247971, EUR 351678.4684971033, EUR 269151.5249360275, EUR 264652.3757708976, EUR 246824.7312505149, and EUR 188665.3961802899.