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David Tsao stock trades

Chief Technology Officer of BillionToOne

5 open-market trades reported in the last 3 months: 5 sales for $6.8M. Every sale was under a trading plan set up in advance. The newest was filed Sep 28.

Where David Tsao files

Each title as their newest Form 4 there gives it, and the open-market trades there in the last 3 months. Open any stock for its score. Pro members see every stock ranked.

CompanyTradesQuality Score
BLLNBillionToOneChief Technology Officer58

David Tsao's trades, as filed

Open-market buys and sales, newest first, each with its Form 4 on the SEC's site. A Plan tag marks a sale under a trading plan set up in advance.

StockTraded
BLLNBillionToOneSellPlan$417K3,333 at $125.00Sep 24filed Sep 28SEC filing
BLLNBillionToOneSellPlan$2M20,000 at $98.77Sep 9filed Sep 11SEC filing
BLLNBillionToOneSellPlan$1M10,000 at $100.00Aug 25filed Aug 27SEC filing

2 more trades on record, and 7 other filings (option exercises and conversion). Pro members see every trade, the shares David Tsao held after each, and every filing.

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An officer or a director has two business days to report a trade on a Form 4, so a trade is public within days. We read the SEC's new filings every 3 hours. Quality Scores as of 7:19 PM ET, delayed at least 15 minutes.

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Others who file at BillionToOne

Insider trades by person

Trades are shown as filed with the SEC on Form 4. Quality Scores on this page are delayed at least 15 minutes.