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INSIDER · CIK 2087127

Tsao David

Chief Technology Officer, Director at BillionToOne, Inc. (BLLN)

↗12 Form 4 rows in the window

Covers original filings from Aug 1, 2026 to Oct 29, 2026. Older trades and amendments are in the SEC history.

$0.00Bought on the market
$6.5MSold on the market
1Companies
Oct 7, 2026Latest filing
Form 4 trades by Tsao David
CompanyTitleTypeOwned
Oct 7, 202619:56Oct 5, 2026BLLNBillionToOne, Inc.Chief Technology Officer, DirectorS · Sell10b5-1$108.15−20,0001,000-95%−$2.2M
Oct 7, 202619:56Oct 5, 2026BLLNBillionToOne, Inc.Chief Technology Officer, DirectorM · Exercise10b5-1$2.80+20,00021,000+2000%$56K
Sep 28, 202617:57Sep 24, 2026BLLNBillionToOne, Inc.Chief Technology Officer, DirectorS · Sell10b5-1$125.00−3,3331,000-77%−$417K
Sep 28, 202617:57Sep 24, 2026BLLNBillionToOne, Inc.Chief Technology Officer, DirectorM · Exercise10b5-1$2.80+3,3334,333+333%$9K
Sep 11, 202618:01Sep 9, 2026BLLNBillionToOne, Inc.Chief Technology Officer, DirectorS · Sell10b5-1$98.77−20,0001,000-95%−$2.0M
Sep 11, 202618:01Sep 9, 2026BLLNBillionToOne, Inc.Chief Technology Officer, DirectorM · Exercise10b5-1$2.80+20,00021,000+2000%$56K
Sep 8, 202621:55Sep 8, 2026BLLNBillionToOne, Inc.Chief Technology Officer, DirectorG · Gift—−20,0001,000-95%—
Sep 8, 202621:55Sep 3, 2026BLLNBillionToOne, Inc.Chief Technology Officer, DirectorC · ConvertLate 5d—+20,00021,000+2000%—
Aug 27, 202620:19Aug 25, 2026BLLNBillionToOne, Inc.Chief Technology Officer, DirectorS · Sell10b5-1$100.00−10,0001,000-91%−$1.0M
Aug 27, 202620:19Aug 25, 2026BLLNBillionToOne, Inc.Chief Technology Officer, DirectorM · Exercise10b5-1$2.80+10,00011,000+1000%$28K
Aug 12, 202618:51Aug 10, 2026BLLNBillionToOne, Inc.Chief Technology Officer, DirectorS · Sell10b5-1$92.86−10,0001,000-91%−$929K
Aug 12, 202618:51Aug 10, 2026BLLNBillionToOne, Inc.Chief Technology Officer, DirectorM · Exercise10b5-1$2.80+10,00011,000+1000%$28K
Tsao David Insider Trades (BLLN) | Shameless Cloning