r.rotation.to⌕ Search stocks, people, sectors
Request a free account

Follow the people · Insider

DT

David Tsao

Insider · Chief Technology Officer · BLLN

David Tsao files insider transactions with the SEC as a chief technology officer of BillionToOne (BLLN). We hold 4 disclosed purchases and sales filed since 12 November 2025, 4 of them in the last 90 days.

  • Files forBLLN
  • Disclosed buys and sells4 in all, 4 in the last 90 days
  • Last disclosure8 September 2026

Positions held

1 post we hold — a term names its own dates; a run of filings only says when they filed
  • Filed 7 November 2025 — 8 September 2026Chief Technology Officer · BillionToOne (BLLN)47 Form 4 lines · source: SEC Form 4

Everything they disclosed

47 entries, newest first — one per disclosure report, one per Form 4 line

Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.