Tsao David Insider Trades & Stock Holdings

Chief Technology Officer · BillionToOne, Inc. · Latest filing Oct 5, 2026

Tsao David, Chief Technology Officer at BillionToOne, Inc. has 2 Form 4 trades on file since Sep 24, 2026. Open-market activity: 0 purchases ($0) and 2 sales ($2.58M), net -$2.58M. Latest filing: disposed of 20K shares of $BLLN on Oct 5, 2026 at $108.15.

Trades on file: 2
Open-market bought: $0
Open-market sold: $2.58M
Net open-market: -$2.58M
Latest filing: Oct 5, 2026

All insider trades by Tsao David

Date	Ticker	Type	Shares	Price	Value	Owned after	ΔOwn	1W	1M	6M	Role	Filing	Story
Oct 5, 2026	$BLLN	Sell (Open-market sale) 10b5-1	20K	$108.15	$2.16M			-14.7%			Chief Technology Officer		—
Sep 24, 2026	$BLLN	Sell (Open-market sale) 10b5-1	3.33K	$125	$416.62K			-15.3%			Chief Technology Officer		—

"Buy" means shares acquired on the Form 4 (including grants and option exercises); "Sell" means shares disposed. 1W / 1M / 6M = how the stock moved after the trade.

Stocks Tsao David traded

$BLLN

Frequently asked questions

Has Tsao David been buying or selling stock?

Tsao David has 0 open-market purchases and 2 open-market sales on file, net -$2.58M. Grants, option exercises and tax withholding are listed separately because they are not open-market trades.

What was Tsao David's latest insider trade?

disposed of 20K shares of $BLLN on Oct 5, 2026 at $108.15.

All insiders Insider cluster buys Top insider purchases Latest insider trade news

Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.

Get trade alerts by text