Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| BillionToOne, Inc.BLLN · Entity 3992 | Director · Chief Technology Officer | October 05, 2026 | October 07, 2026 |
Disclosed balances
About these balances
Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.
BillionToOne, Inc.
Report date October 05, 2026 · Filed October 07, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Class A Common StockSEC Table I · non-derivative | Direct | 1,000 |
Ending reported balance
After 2026-10-05 transaction · row 13
13 source rows · reconciled sequenceRow 1 · 2026-10-05 · Exercise / conversion · Acquired 10,000 · Balance 11,000 F1: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. Row 2 · 2026-10-05 · Exercise / conversion · Acquired 10,000 · Balance 21,000 F1: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. Row 3 · 2026-10-05 · Sale · Disposed 866 · Balance 20,134 F1: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F2: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.505 to $106.350 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Row 4 · 2026-10-05 · Sale · Disposed 1,909 · Balance 18,225 F1: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F3: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $106.730 to $107.700 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Row 5 · 2026-10-05 · Sale · Disposed 4,284 · Balance 13,941 F1: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F4: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.7354 to $108.710 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Row 6 · 2026-10-05 · Sale · Disposed 2,921 · Balance 11,020 F1: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F5: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.740 to $109.480 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Row 7 · 2026-10-05 · Sale · Disposed 20 · Balance 11,000 F1: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. Row 8 · 2026-10-05 · Sale · Disposed 555 · Balance 10,445 F1: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F6: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.880 to $105.720 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Row 9 · 2026-10-05 · Sale · Disposed 400 · Balance 10,045 F1: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F7: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.890 to $106.180 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Row 10 · 2026-10-05 · Sale · Disposed 2,200 · Balance 7,845 F1: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F8: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.010 to $107.970 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Row 11 · 2026-10-05 · Sale · Disposed 4,916 · Balance 2,929 F1: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F9: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.040 to $109.030 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Row 12 · 2026-10-05 · Sale · Disposed 1,829 · Balance 1,100 F1: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F10: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $109.040 to $109.500 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Row 13 · 2026-10-05 · Sale · Disposed 100 · Balance 1,000 F1: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. |
| Stock Option (right to buy)SEC Table II · derivative / convertible security · Conversion / exercise price $2.80 · Expires 2031-06-07 | Direct | 546,667 |
Reported balance
After 2026-10-05 transaction · row 14
Instrument identity requires review; Table II rows are not merged.
1 source rowRow 14 · 2026-10-05 · Exercise / conversion · Disposed 10,000 · Balance 546,667 F11: The options are fully vested and exercisable. |
| Stock Option (right to buy)SEC Table II · derivative / convertible security · Conversion / exercise price $2.80 · Expires 2031-06-07 | Direct | 536,667 |
Reported balance
After 2026-10-05 transaction · row 15
Instrument identity requires review; Table II rows are not merged.
1 source rowRow 15 · 2026-10-05 · Exercise / conversion · Disposed 10,000 · Balance 536,667 F11: The options are fully vested and exercisable. |
Filing footnotes · ownership attribution and instrument terms
F1: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026.
F2: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.505 to $106.350 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F3: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $106.730 to $107.700 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F4: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.7354 to $108.710 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F5: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.740 to $109.480 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F6: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.880 to $105.720 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F7: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.890 to $106.180 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F8: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.010 to $107.970 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F9: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.040 to $109.030 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F10: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $109.040 to $109.500 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F11: The options are fully vested and exercisable.
Transaction history
JSON APIPurchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| October 05, 2026 Filed Oct 7, 2026 23:56 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionStock Option (right to buy) · Derivative | 10,000 | $2.80 Strike: $2.80 | $28,000.00 |
DisclosureSEC source: 0002087127-26-000015 · wk-form4_1791417392.xml · derivative · entry 15 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 536,667 Underlying: Class A Common Stock · 10,000 shares Expires 2031-06-07 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F11 · derivative.exercise_date: The options are fully vested and exercisable. Read SEC document |
| October 05, 2026 Filed Oct 7, 2026 23:56 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionStock Option (right to buy) · Derivative | 10,000 | $2.80 Strike: $2.80 | $28,000.00 |
DisclosureSEC source: 0002087127-26-000015 · wk-form4_1791417392.xml · derivative · entry 14 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 546,667 Underlying: Class A Common Stock · 10,000 shares Expires 2031-06-07 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F11 · derivative.exercise_date: The options are fully vested and exercisable. Read SEC document |
| October 05, 2026 Filed Oct 7, 2026 23:56 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 100 | $110.09 | $11,009.00 |
DisclosureSEC source: 0002087127-26-000015 · wk-form4_1791417392.xml · nonDerivative · entry 13 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 1,000 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. Read SEC document |
| October 05, 2026 Filed Oct 7, 2026 23:56 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 1,829 | $109.14 | $199,625.29 |
DisclosureSEC source: 0002087127-26-000015 · wk-form4_1791417392.xml · nonDerivative · entry 12 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 1,100 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F10 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $109.040 to $109.500 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| October 05, 2026 Filed Oct 7, 2026 23:56 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 4,916 | $108.53 | $533,554.13 |
DisclosureSEC source: 0002087127-26-000015 · wk-form4_1791417392.xml · nonDerivative · entry 11 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 2,929 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F9 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.040 to $109.030 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| October 05, 2026 Filed Oct 7, 2026 23:56 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 2,200 | $107.47 | $236,435.10 |
DisclosureSEC source: 0002087127-26-000015 · wk-form4_1791417392.xml · nonDerivative · entry 10 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 7,845 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F8 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.010 to $107.970 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| October 05, 2026 Filed Oct 7, 2026 23:56 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 400 | $106.10 | $42,441.52 |
DisclosureSEC source: 0002087127-26-000015 · wk-form4_1791417392.xml · nonDerivative · entry 9 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 10,045 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F7 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.890 to $106.180 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| October 05, 2026 Filed Oct 7, 2026 23:56 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 555 | $105.56 | $58,585.08 |
DisclosureSEC source: 0002087127-26-000015 · wk-form4_1791417392.xml · nonDerivative · entry 8 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 10,445 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F6 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.880 to $105.720 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| October 05, 2026 Filed Oct 7, 2026 23:56 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 20 | $110.08 | $2,201.60 |
DisclosureSEC source: 0002087127-26-000015 · wk-form4_1791417392.xml · nonDerivative · entry 7 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 11,000 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. Read SEC document |
| October 05, 2026 Filed Oct 7, 2026 23:56 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 2,921 | $109.00 | $318,398.06 |
DisclosureSEC source: 0002087127-26-000015 · wk-form4_1791417392.xml · nonDerivative · entry 6 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 11,020 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F5 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.740 to $109.480 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| October 05, 2026 Filed Oct 7, 2026 23:56 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 4,284 | $108.39 | $464,355.61 |
DisclosureSEC source: 0002087127-26-000015 · wk-form4_1791417392.xml · nonDerivative · entry 5 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 13,941 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F4 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.7354 to $108.710 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| October 05, 2026 Filed Oct 7, 2026 23:56 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 1,909 | $107.20 | $204,635.26 |
DisclosureSEC source: 0002087127-26-000015 · wk-form4_1791417392.xml · nonDerivative · entry 4 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 18,225 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F3 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $106.730 to $107.700 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| October 05, 2026 Filed Oct 7, 2026 23:56 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 866 | $105.90 | $91,709.75 |
DisclosureSEC source: 0002087127-26-000015 · wk-form4_1791417392.xml · nonDerivative · entry 3 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 20,134 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. F2 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.505 to $106.350 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| October 05, 2026 Filed Oct 7, 2026 23:56 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionClass A Common Stock | 10,000 | $2.80 | $28,000.00 |
DisclosureSEC source: 0002087127-26-000015 · wk-form4_1791417392.xml · nonDerivative · entry 2 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 21,000 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. Read SEC document |
| October 05, 2026 Filed Oct 7, 2026 23:56 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionClass A Common Stock | 10,000 | $2.80 | $28,000.00 |
DisclosureSEC source: 0002087127-26-000015 · wk-form4_1791417392.xml · nonDerivative · entry 1 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 11,000 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. Read SEC document |
| September 24, 2026 Filed Sep 28, 2026 21:57 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionStock Option (right to buy) · Derivative | 3,333 | $2.80 Strike: $2.80 | $9,332.40 |
DisclosureSEC source: 0002087127-26-000013 · wk-form4_1790632623.xml · derivative · entry 3 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 556,667 Underlying: Class A Common Stock · 3,333 shares Expires 2031-06-07 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · derivative.exercise_date: The options are fully vested and exercisable. Read SEC document |
| September 24, 2026 Filed Sep 28, 2026 21:57 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 3,333 | $125.00 | $416,625.00 |
DisclosureSEC source: 0002087127-26-000013 · wk-form4_1790632623.xml · nonDerivative · entry 2 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 1,000 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. Read SEC document |
| September 24, 2026 Filed Sep 28, 2026 21:57 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionClass A Common Stock | 3,333 | $2.80 | $9,332.40 |
DisclosureSEC source: 0002087127-26-000013 · wk-form4_1790632623.xml · nonDerivative · entry 1 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 4,333 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. Read SEC document |
| September 09, 2026 Filed Sep 11, 2026 22:01 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionStock Option (right to buy) · Derivative | 10,000 | $2.80 Strike: $2.80 | $28,000.00 |
DisclosureSEC source: 0002087127-26-000011 · wk-form4_1789164088.xml · derivative · entry 6 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 560,000 Underlying: Class A Common Stock · 10,000 shares Expires 2031-06-07 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · derivative.exercise_date: The options are fully vested and exercisable. Read SEC document |
| September 09, 2026 Filed Sep 11, 2026 22:01 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionStock Option (right to buy) · Derivative | 10,000 | $2.80 Strike: $2.80 | $28,000.00 |
DisclosureSEC source: 0002087127-26-000011 · wk-form4_1789164088.xml · derivative · entry 5 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 570,000 Underlying: Class A Common Stock · 10,000 shares Expires 2031-06-07 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · derivative.exercise_date: The options are fully vested and exercisable. Read SEC document |
| September 09, 2026 Filed Sep 11, 2026 22:01 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 10,000 | $100.00 | $1,000,000.00 |
DisclosureSEC source: 0002087127-26-000011 · wk-form4_1789164088.xml · nonDerivative · entry 4 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 1,000 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. Read SEC document |
| September 09, 2026 Filed Sep 11, 2026 22:01 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 10,000 | $97.54 | $975,400.00 |
DisclosureSEC source: 0002087127-26-000011 · wk-form4_1789164088.xml · nonDerivative · entry 3 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 11,000 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. Read SEC document |
| September 09, 2026 Filed Sep 11, 2026 22:01 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionClass A Common Stock | 10,000 | $2.80 | $28,000.00 |
DisclosureSEC source: 0002087127-26-000011 · wk-form4_1789164088.xml · nonDerivative · entry 2 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 21,000 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. Read SEC document |
| September 09, 2026 Filed Sep 11, 2026 22:01 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionClass A Common Stock | 10,000 | $2.80 | $28,000.00 |
DisclosureSEC source: 0002087127-26-000011 · wk-form4_1789164088.xml · nonDerivative · entry 1 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 11,000 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026. Read SEC document |
| September 08, 2026 Filed Sep 9, 2026 01:55 UTC | BillionToOne, Inc. BLLN · Entity 3992 | GiftClass A Common Stock | 20,000 | $0.00 | $0.00 |
DisclosureSEC source: 0002087127-26-000009 · wk-form4_1788918947.xml · nonDerivative · entry 2 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 1,000 Read SEC document |
| September 03, 2026 Filed Sep 9, 2026 01:55 UTC | BillionToOne, Inc. BLLN · Entity 3992 | ConversionClass B Common Stock · Derivative | 20,000 | $0.00 | $0.00 |
DisclosureSEC source: 0002087127-26-000009 · wk-form4_1788918947.xml · derivative · entry 3 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 2,305,108 Underlying: Class A Common Stock · 20,000 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_price: These shares of Class B common stock were converted at a 1:1 ratio for shares of Class A common stock at the option of the holder. F2 · derivative.exercise_price: Each share of Class B Common Stock is convertible into one share of Class A common stock at the option of the holder. Class B common stock will convert automatically on a one-for-one basis into shares of the Issuer's Class A common stock upon the earliest of (i) seven years from the date of filing of the amended and restated certificate of incorporation, in connection with the Offering and (ii) the date specified by a vote of the holders of Class B common stock representing a majority of the outstanding shares of Class B common stock. F1 · price: These shares of Class B common stock were converted at a 1:1 ratio for shares of Class A common stock at the option of the holder. F2 · derivative.exercise_date: Each share of Class B Common Stock is convertible into one share of Class A common stock at the option of the holder. Class B common stock will convert automatically on a one-for-one basis into shares of the Issuer's Class A common stock upon the earliest of (i) seven years from the date of filing of the amended and restated certificate of incorporation, in connection with the Offering and (ii) the date specified by a vote of the holders of Class B common stock representing a majority of the outstanding shares of Class B common stock. F2 · derivative.expiration_date: Each share of Class B Common Stock is convertible into one share of Class A common stock at the option of the holder. Class B common stock will convert automatically on a one-for-one basis into shares of the Issuer's Class A common stock upon the earliest of (i) seven years from the date of filing of the amended and restated certificate of incorporation, in connection with the Offering and (ii) the date specified by a vote of the holders of Class B common stock representing a majority of the outstanding shares of Class B common stock. Read SEC document |
| September 03, 2026 Filed Sep 9, 2026 01:55 UTC | BillionToOne, Inc. BLLN · Entity 3992 | ConversionClass A Common Stock | 20,000 | $0.00 | $0.00 |
DisclosureSEC source: 0002087127-26-000009 · wk-form4_1788918947.xml · nonDerivative · entry 1 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 21,000 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · kind: These shares of Class B common stock were converted at a 1:1 ratio for shares of Class A common stock at the option of the holder. F1 · price: These shares of Class B common stock were converted at a 1:1 ratio for shares of Class A common stock at the option of the holder. Read SEC document |
| August 25, 2026 Filed Aug 28, 2026 00:19 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionStock Option (right to buy) · Derivative | 10,000 | $2.80 Strike: $2.80 | $28,000.00 |
DisclosureSEC source: 0002087127-26-000006 · wk-form4_1787876389.xml · derivative · entry 3 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 580,000 Underlying: Class A Common Stock · 10,000 shares Expires 2031-06-07 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · derivative.exercise_date: The options are fully vested and exercisable. Read SEC document |
| August 25, 2026 Filed Aug 28, 2026 00:19 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 10,000 | $100.00 | $1,000,000.00 |
DisclosureSEC source: 0002087127-26-000006 · wk-form4_1787876389.xml · nonDerivative · entry 2 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 1,000 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. Read SEC document |
| August 25, 2026 Filed Aug 28, 2026 00:19 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionClass A Common Stock | 10,000 | $2.80 | $28,000.00 |
DisclosureSEC source: 0002087127-26-000006 · wk-form4_1787876389.xml · nonDerivative · entry 1 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 11,000 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. Read SEC document |
| August 10, 2026 Filed Aug 12, 2026 22:51 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionStock Option (right to buy) · Derivative | 10,000 | $2.80 Strike: $2.80 | $28,000.00 |
DisclosureSEC source: 0002070849-26-000058 · wk-form4_1786575110.xml · derivative · entry 3 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 590,000 Underlying: Class A Common Stock · 10,000 shares Expires 2031-06-07 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · derivative.exercise_date: The options are fully vested and exercisable. Read SEC document |
| August 10, 2026 Filed Aug 12, 2026 22:51 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 10,000 | $92.86 | $928,600.00 |
DisclosureSEC source: 0002070849-26-000058 · wk-form4_1786575110.xml · nonDerivative · entry 2 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 1,000 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. Read SEC document |
| August 10, 2026 Filed Aug 12, 2026 22:51 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionClass A Common Stock | 10,000 | $2.80 | $28,000.00 |
DisclosureSEC source: 0002070849-26-000058 · wk-form4_1786575110.xml · nonDerivative · entry 1 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 11,000 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. Read SEC document |
| July 13, 2026 Filed Jul 15, 2026 20:38 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionStock Option (right to buy) · Derivative | 10,000 | $2.80 Strike: $2.80 | $28,000.00 |
DisclosureSEC source: 0002087127-26-000004 · wk-form4_1784147888.xml · derivative · entry 14 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 600,000 Underlying: Class A Common Stock · 10,000 shares Expires 2031-06-07 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F12 · derivative.exercise_date: The options are fully vested and exercisable. Read SEC document |
| July 13, 2026 Filed Jul 15, 2026 20:38 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionStock Option (right to buy) · Derivative | 10,000 | $2.80 Strike: $2.80 | $28,000.00 |
DisclosureSEC source: 0002087127-26-000004 · wk-form4_1784147888.xml · derivative · entry 13 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 610,000 Underlying: Class A Common Stock · 10,000 shares Expires 2031-06-07 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F12 · derivative.exercise_date: The options are fully vested and exercisable. Read SEC document |
| July 13, 2026 Filed Jul 15, 2026 20:38 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 1,028 | $126.90 | $130,448.27 |
DisclosureSEC source: 0002087127-26-000004 · wk-form4_1784147888.xml · nonDerivative · entry 12 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 1,000 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. F11 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $126.360 to $127.220 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| July 13, 2026 Filed Jul 15, 2026 20:38 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 3,835 | $125.76 | $482,285.00 |
DisclosureSEC source: 0002087127-26-000004 · wk-form4_1784147888.xml · nonDerivative · entry 11 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 2,028 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. F10 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $125.295 to $126.2805 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| July 13, 2026 Filed Jul 15, 2026 20:38 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 1,725 | $124.65 | $215,027.81 |
DisclosureSEC source: 0002087127-26-000004 · wk-form4_1784147888.xml · nonDerivative · entry 10 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 5,863 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. F9 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $124.290 to $125.240 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| July 13, 2026 Filed Jul 15, 2026 20:38 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 2,274 | $123.71 | $281,313.81 |
DisclosureSEC source: 0002087127-26-000004 · wk-form4_1784147888.xml · nonDerivative · entry 9 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 7,588 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. F8 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $123.2852 to $124.258 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| July 13, 2026 Filed Jul 15, 2026 20:38 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 1,138 | $122.84 | $139,795.11 |
DisclosureSEC source: 0002087127-26-000004 · wk-form4_1784147888.xml · nonDerivative · entry 8 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 9,862 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. F7 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $122.185 to $123.105 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| July 13, 2026 Filed Jul 15, 2026 20:38 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 821 | $126.89 | $104,175.05 |
DisclosureSEC source: 0002087127-26-000004 · wk-form4_1784147888.xml · nonDerivative · entry 7 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 11,000 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. F6 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $126.490 to $127.2981 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| July 13, 2026 Filed Jul 15, 2026 20:38 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 3,185 | $125.85 | $400,818.87 |
DisclosureSEC source: 0002087127-26-000004 · wk-form4_1784147888.xml · nonDerivative · entry 6 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 11,821 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. F5 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $125.4525 to $126.450 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| July 13, 2026 Filed Jul 15, 2026 20:38 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 2,415 | $124.90 | $301,632.53 |
DisclosureSEC source: 0002087127-26-000004 · wk-form4_1784147888.xml · nonDerivative · entry 5 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 15,006 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. F4 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $124.450 to $125.4325 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| July 13, 2026 Filed Jul 15, 2026 20:38 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 2,477 | $123.84 | $306,760.35 |
DisclosureSEC source: 0002087127-26-000004 · wk-form4_1784147888.xml · nonDerivative · entry 4 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 17,421 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. F3 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $123.440 to $124.435 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| July 13, 2026 Filed Jul 15, 2026 20:38 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 1,102 | $122.90 | $135,440.76 |
DisclosureSEC source: 0002087127-26-000004 · wk-form4_1784147888.xml · nonDerivative · entry 3 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 19,898 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. F2 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $122.420 to $123.3775 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
| July 13, 2026 Filed Jul 15, 2026 20:38 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionClass A Common Stock | 10,000 | $2.80 | $28,000.00 |
DisclosureSEC source: 0002087127-26-000004 · wk-form4_1784147888.xml · nonDerivative · entry 2 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 21,000 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. Read SEC document |
| July 13, 2026 Filed Jul 15, 2026 20:38 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionClass A Common Stock | 10,000 | $2.80 | $28,000.00 |
DisclosureSEC source: 0002087127-26-000004 · wk-form4_1784147888.xml · nonDerivative · entry 1 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 11,000 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. Read SEC document |
| June 15, 2026 Filed Jun 17, 2026 21:47 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionStock Option (right to buy) · Derivative | 10,000 | $2.80 Strike: $2.80 | $28,000.00 |
DisclosureSEC source: 0002087127-26-000002 · wk-form4_1781732827.xml · derivative · entry 15 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 620,000 Underlying: Class A Common Stock · 10,000 shares Expires 2031-06-07 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F13 · derivative.exercise_date: The options are fully vested and exercisable. Read SEC document |
| June 15, 2026 Filed Jun 17, 2026 21:47 UTC | BillionToOne, Inc. BLLN · Entity 3992 | Exercise / conversionStock Option (right to buy) · Derivative | 10,000 | $2.80 Strike: $2.80 | $28,000.00 |
DisclosureSEC source: 0002087127-26-000002 · wk-form4_1781732827.xml · derivative · entry 14 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 630,000 Underlying: Class A Common Stock · 10,000 shares Expires 2031-06-07 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F13 · derivative.exercise_date: The options are fully vested and exercisable. Read SEC document |
| June 15, 2026 Filed Jun 17, 2026 21:47 UTC | BillionToOne, Inc. BLLN · Entity 3992 | SaleClass A Common Stock | 563 | $104.32 | $58,730.30 |
DisclosureSEC source: 0002087127-26-000002 · wk-form4_1781732827.xml · nonDerivative · entry 13 Tsao David · CIK 0002087127 · Director · Chief Technology Officer 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 1,000 F1 · kind: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. F12 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.160 to $104.540 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.