Tsao David
SEC CIK 2087127 · EDGAR
BoughtSold
Companies
| Ticker | Company | Title | Holding | Bought | Sold | Trades | First | Last |
|---|---|---|---|---|---|---|---|---|
| BLLN | BillionToOne, Inc. | CTO, Dir | 21.0K | $60.0K | $8.45M | 14 | 2025-11-07 | 2026-09-09 |
Most active insiders at BLLN, 12 months
| # | Insider | Title | Bought | Sold |
|---|---|---|---|---|
| 1 | Atay Oguzhan | See Remarks, Dir | — | $21.63M |
| 2 | Tsao David | CTO, Dir | $60.0K | $8.45M |
| 3 | Lynch Thomas P. | See Remarks | $6,000 | $5.87M |
| 4 | Johnson Nancy JoAnn | See Remarks | $414.0K | $3.32M |
| 5 | Sakakibara Shan Riku | Chief Product Off | — | $3.23M |
| 6 | Bremner Thomas S | Dir | $2.50M | — |
| 7 | ten Bosch John Roderick | See Remarks | $48.0K | $1.55M |
| 8 | Rai Akshay | Dir | $150.0K | — |
| 9 | Pagano Anthony | Dir | — | — |
| 10 | HB&Q NV (HB&Q COMPARTMENT III) | 10% | — | — |
Transactions 14
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DMT | 2026-09-11 18:01 | 2026-09-09 | BLLN | BillionToOne, Inc. | Tsao David | CTO, Dir | M - OptEx | $2.80 | +20.0K | 21.0K | +2,000% | +$56.0K |
| DMT | 2026-09-11 18:01 | 2026-09-09 | BLLN | BillionToOne, Inc. | Tsao David | CTO, Dir | S - Sale+OE | $98.77 | -20.0K | 1,000 | -95% | -$1.98M |
| D | 2026-09-08 21:55 | 2026-09-03 | BLLN | BillionToOne, Inc. | Tsao David | CTO, Dir | C - Cnv Deriv | $0.00 | +20.0K | 21.0K | +2,000% | $0 |
| D | 2026-09-08 21:55 | 2026-09-08 | BLLN | BillionToOne, Inc. | Tsao David | CTO, Dir | G - Gift | $0.00 | -20.0K | 1,000 | -95% | $0 |
| DT | 2026-08-27 20:19 | 2026-08-25 | BLLN | BillionToOne, Inc. | Tsao David | CTO, Dir | M - OptEx | $2.80 | +10.0K | 11.0K | +1,000% | +$28.0K |
| DT | 2026-08-27 20:19 | 2026-08-25 | BLLN | BillionToOne, Inc. | Tsao David | CTO, Dir | S - Sale+OE | $100.00 | -10.0K | 1,000 | -91% | -$1.00M |
| DT | 2026-08-12 18:51 | 2026-08-10 | BLLN | BillionToOne, Inc. | Tsao David | CTO, Dir | M - OptEx | $2.80 | +10.0K | 11.0K | +1,000% | +$28.0K |
| DT | 2026-08-12 18:51 | 2026-08-10 | BLLN | BillionToOne, Inc. | Tsao David | CTO, Dir | S - Sale+OE | $92.86 | -10.0K | 1,000 | -91% | -$928.6K |
| DMT | 2026-07-15 16:38 | 2026-07-13 | BLLN | BillionToOne, Inc. | Tsao David | CTO, Dir | M - OptEx | $2.80 | +20.0K | 21.0K | +2,000% | +$56.0K |
| DMT | 2026-07-15 16:38 | 2026-07-13 | BLLN | BillionToOne, Inc. | Tsao David | CTO, Dir | S - Sale+OE | $124.88 | -20.0K | 1,000 | -95% | -$2.50M |
| DMT | 2026-06-17 17:47 | 2026-06-15 | BLLN | BillionToOne, Inc. | Tsao David | CTO, Dir | M - OptEx | $2.80 | +20.0K | 21.0K | +2,000% | +$56.0K |
| DMT | 2026-06-17 17:47 | 2026-06-15 | BLLN | BillionToOne, Inc. | Tsao David | CTO, Dir | S - Sale+OE | $102.27 | -20.0K | 1,000 | -95% | -$2.05M |
| D | 2025-11-12 | 2025-11-07 | BLLN | BillionToOne, Inc. | Tsao David | CTO, Dir | P - Purchase | $60.00 | +1,000 | 1,000 | New | +$60.0K |
| DM | 2025-11-12 | 2025-11-07 | BLLN | BillionToOne, Inc. | Tsao David | CTO, Dir | J - Other | — | -2.33M | 0 | -100% | — |
Purchase Sale Sale after option exercise All abbreviations