David Tsao

Chief Technology Officer, Director, BillionToOne, Inc.

Bought, 12 months

$0.1M

Sold, 12 months

$11.0M

Companies

Latest trade

Oct 5, 2026

Companies

BillionToOne, Inc.Chief Technology Officer, Director +$0.1M −$11.0M

Trades

BLLN Sold 20,000 shares at $108.15 · planned $2.2M Oct 5

BLLN Sold 3,333 shares at $125.00 · planned $0.4M Sep 24

BLLN Sold 20,000 shares at $98.77 · planned $2.0M Sep 9

BLLN Sold 10,000 shares at $100.00 · planned $1.0M Aug 25

BLLN Sold 10,000 shares at $92.86 · planned $0.9M Aug 10

BLLN Sold 20,000 shares at $124.89 · planned $2.5M Jul 13

BLLN Sold 20,000 shares at $102.26 · planned $2.0M Jun 15

BLLN Bought 1,000 shares at $60.00 $0.1M Nov 7

Open-market trades from SEC Form 4 only: no grants, option exercises or gifts. People are matched by the name on their filings, so two people with the same name share this page. For information only — not investment advice.