Tsao Davidinsider trades
In SEC Form 4 filings, Tsao David is listed as Chief Technology Officer of BillionToOne, Inc. (BLLN). In the last 90 days, Tsao David sold $5.55M of BillionToOne, Inc. (BLLN) on the open market and bought none. All 15 sales were reported under a 10b5-1 trading plan.
Companies and roles
| Company | Role | Transactions | Last filed |
|---|---|---|---|
| BLLNBillionToOne, Inc. | Chief Technology Officer | 30 | Oct 7 |
Cluster buys
No cluster buy in the last 90 days included a purchase by this insider (two or more insiders buying within 14 days).
Form 4 historysince 2026-08-27
| Company | Traded | Filed | Type | Shares | Price | Value | Owned after | 10b5-1 plan | Filing |
|---|---|---|---|---|---|---|---|---|---|
| BLLNBillionToOne, Inc. | Oct 5 | Oct 7 | M | 10,000 | $2.80 | $28,000 | 11,000 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Oct 5 | Oct 7 | M | 10,000 | $2.80 | $28,000 | 21,000 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Oct 5 | Oct 7 | S | 866 | $105.90 | Sale −$91,710 | 20,134 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Oct 5 | Oct 7 | S | 1,909 | $107.20 | Sale −$204,635 | 18,225 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Oct 5 | Oct 7 | S | 4,284 | $108.39 | Sale −$464,356 | 13,941 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Oct 5 | Oct 7 | S | 2,921 | $109.00 | Sale −$318,398 | 11,020 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Oct 5 | Oct 7 | S | 20 | $110.08 | Sale −$2,202 | 11,000 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Oct 5 | Oct 7 | S | 555 | $105.56 | Sale −$58,585 | 10,445 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Oct 5 | Oct 7 | S | 400 | $106.10 | Sale −$42,442 | 10,045 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Oct 5 | Oct 7 | S | 2,200 | $107.47 | Sale −$236,435 | 7,845 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Oct 5 | Oct 7 | S | 4,916 | $108.53 | Sale −$533,554 | 2,929 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Oct 5 | Oct 7 | S | 1,829 | $109.14 | Sale −$199,625 | 1,100 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Oct 5 | Oct 7 | S | 100 | $110.09 | Sale −$11,009 | 1,000 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Oct 5 | Oct 7 | M · derivative | 10,000 | $2.80 | $28,000 | 546,667 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Oct 5 | Oct 7 | M · derivative | 10,000 | $2.80 | $28,000 | 536,667 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Sep 24 | Sep 28 | M | 3,333 | $2.80 | $9,332 | 4,333 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Sep 24 | Sep 28 | S | 3,333 | $125.00 | Sale −$416,625 | 1,000 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Sep 24 | Sep 28 | M · derivative | 3,333 | $2.80 | $9,332 | 556,667 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Sep 9 | Sep 11 | M | 10,000 | $2.80 | $28,000 | 11,000 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Sep 9 | Sep 11 | M | 10,000 | $2.80 | $28,000 | 21,000 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Sep 9 | Sep 11 | S | 10,000 | $97.54 | Sale −$975,400 | 11,000 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Sep 9 | Sep 11 | S | 10,000 | $100.00 | Sale −$1,000,000 | 1,000 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Sep 9 | Sep 11 | M · derivative | 10,000 | $2.80 | $28,000 | 570,000 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Sep 9 | Sep 11 | M · derivative | 10,000 | $2.80 | $28,000 | 560,000 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Sep 8 | Sep 8 | G | 20,000 | $0.00 | $0 | 1,000 | No | Form 4 |
| BLLNBillionToOne, Inc. | Sep 3 | Sep 8 | C | 20,000 | $0.00 | $0 | 21,000 | No | Form 4 |
| BLLNBillionToOne, Inc. | Sep 3 | Sep 8 | C · derivative | 20,000 | $0.00 | $0 | 2,305,108 | No | Form 4 |
| BLLNBillionToOne, Inc. | Aug 25 | Aug 27 | M | 10,000 | $2.80 | $28,000 | 11,000 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Aug 25 | Aug 27 | S | 10,000 | $100.00 | Sale −$1,000,000 | 1,000 | Yes | Form 4 |
| BLLNBillionToOne, Inc. | Aug 25 | Aug 27 | M · derivative | 10,000 | $2.80 | $28,000 | 580,000 | Yes | Form 4 |
Published from this insider's public Form 4 filings on SEC EDGAR; the name is shown as filed. Named in a filing and want this page removed? See the privacy policy.