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Insider Profile · SEC Form 4 Activity · Trailing 90 Days

Tsao David

Over the trailing 90 days, Tsao David (Director at BillionToOne, Inc.) traded $4.8M of stock (net selling $4.5M) in BLLN, per 29 SEC Form 4 transactions.

Role
Director
Companies
BLLN
Window
Trailing 90 days · 29 transactions · CIK 2087127
Net activity
−$4.5M ($112K bought · $4.7M sold)

By Company (Trailing 90 Days)

SymbolCompanyTxnsBoughtSoldNet
BLLNBillionToOne, Inc.29$112K$4.7M−$4.5M

Transactions (29)

DateSymbolTypeSharesValueDescription
2026-07-13BLLNSell821$104KOpen market or private sale
2026-07-13BLLNSell3.2K$401KOpen market or private sale
2026-07-13BLLNSell2.4K$302KOpen market or private sale
2026-07-13BLLNSell2.5K$307KOpen market or private sale
2026-07-13BLLNSell10.0K$28KExercise or conversion of derivative security
2026-07-13BLLNBuy10.0K$28KExercise or conversion of derivative security
2026-07-13BLLNBuy10.0K$28KExercise or conversion of derivative security
2026-07-13BLLNSell1.0K$130KOpen market or private sale
2026-07-13BLLNSell1.1K$135KOpen market or private sale
2026-07-13BLLNSell10.0K$28KExercise or conversion of derivative security
2026-07-13BLLNSell3.8K$482KOpen market or private sale
2026-07-13BLLNSell1.7K$215KOpen market or private sale
2026-07-13BLLNSell2.3K$281KOpen market or private sale
2026-07-13BLLNSell1.1K$140KOpen market or private sale
2026-06-15BLLNSell2.4K$249KOpen market or private sale
2026-06-15BLLNSell10.0K$28KExercise or conversion of derivative security
2026-06-15BLLNSell10.0K$28KExercise or conversion of derivative security
2026-06-15BLLNSell230$24KOpen market or private sale
2026-06-15BLLNSell563$59KOpen market or private sale
2026-06-15BLLNSell2.9K$300KOpen market or private sale
2026-06-15BLLNSell2.8K$289KOpen market or private sale
2026-06-15BLLNSell2.4K$240KOpen market or private sale
2026-06-15BLLNSell1.7K$171KOpen market or private sale
2026-06-15BLLNBuy10.0K$28KExercise or conversion of derivative security
2026-06-15BLLNSell2.5K$249KOpen market or private sale
2026-06-15BLLNBuy10.0K$28KExercise or conversion of derivative security
2026-06-15BLLNSell1.0K$100KOpen market or private sale
2026-06-15BLLNSell600$59KOpen market or private sale
2026-06-15BLLNSell3.0K$306KOpen market or private sale

Activity shown covers the trailing 90 days of SEC Form 4 filings. "Buy" and "sell" follow the SEC acquired/disposed codes and include compensation events (grants, option exercises, tax withholding) unless noted. Historical fact, not investment advice.

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