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Johnson Nancy JoAnn

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29576
SEC CIK
0002087387

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
BillionToOne, Inc.BLLN · Entity 3992See RemarksJuly 16, 2026July 20, 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 July 16, 2026 · Filed July 20, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Class A Common StockSEC Table I · non-derivativeDirect6,900 Ending reported balance After 2026-07-16 transaction · row 4
4 source rows · reconciled sequence

Row 1 · 2026-07-16 · Sale · Disposed 2,133 · Balance 18,966

F1: 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: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $126.330 to $127.300 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 2 · 2026-07-16 · Sale · Disposed 5,559 · Balance 13,407

F1: 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: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $127.445 to $128.430 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 3 · 2026-07-16 · Sale · Disposed 5,601 · Balance 7,806

F1: 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: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $128.475 to $129.340 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 · 2026-07-16 · Sale · Disposed 906 · Balance 6,900

F1: 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: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $129.580 to $130.010 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.

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 March 6, 2026.

F2: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $126.330 to $127.300 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 $127.445 to $128.430 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 $128.475 to $129.340 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 $129.580 to $130.010 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.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

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Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
July 16, 2026 Filed Jul 20, 2026 23:38 UTC BillionToOne, Inc. BLLN · Entity 3992 SaleClass A Common Stock 906 $129.78 $117,579.50
Disclosure

SEC source: 0002070849-26-000044 · wk-form4_1784590690.xml · nonDerivative · entry 4

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,900

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 $129.580 to $130.010 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 16, 2026 Filed Jul 20, 2026 23:38 UTC BillionToOne, Inc. BLLN · Entity 3992 SaleClass A Common Stock 5,601 $128.96 $722,277.52
Disclosure

SEC source: 0002070849-26-000044 · wk-form4_1784590690.xml · nonDerivative · entry 3

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,806

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 $128.475 to $129.340 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 16, 2026 Filed Jul 20, 2026 23:38 UTC BillionToOne, Inc. BLLN · Entity 3992 SaleClass A Common Stock 5,559 $127.89 $710,918.27
Disclosure

SEC source: 0002070849-26-000044 · wk-form4_1784590690.xml · nonDerivative · entry 2

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 13,407

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 $127.445 to $128.430 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 16, 2026 Filed Jul 20, 2026 23:38 UTC BillionToOne, Inc. BLLN · Entity 3992 SaleClass A Common Stock 2,133 $126.98 $270,852.82
Disclosure

SEC source: 0002070849-26-000044 · wk-form4_1784590690.xml · nonDerivative · entry 1

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 18,966

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 $126.330 to $127.300 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 01, 2026 Filed Jul 7, 2026 00:38 UTC BillionToOne, Inc. BLLN · Entity 3992 SaleClass A Common Stock 801 $124.91 $100,055.87
Disclosure

SEC source: 0002087387-26-000002 · wk-form4_1783384686.xml · nonDerivative · entry 1

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 21,099

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 $124.900 to $124.940 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
June 09, 2026 Filed Jun 11, 2026 00:36 UTC BillionToOne, Inc. BLLN · Entity 3992 SaleClass A Common Stock 1,400 $100.31 $140,431.06
Disclosure

SEC source: 0002070849-26-000036 · wk-form4_1781138180.xml · nonDerivative · entry 7

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 21,900

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 $99.990 to $100.720 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
June 09, 2026 Filed Jun 11, 2026 00:36 UTC BillionToOne, Inc. BLLN · Entity 3992 SaleClass A Common Stock 1,816 $102.34 $185,843.45
Disclosure

SEC source: 0002070849-26-000036 · wk-form4_1781138180.xml · nonDerivative · entry 6

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 23,300

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 $101.990 to $102.570 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
June 09, 2026 Filed Jun 11, 2026 00:36 UTC BillionToOne, Inc. BLLN · Entity 3992 SaleClass A Common Stock 2,700 $101.38 $273,714.39
Disclosure

SEC source: 0002070849-26-000036 · wk-form4_1781138180.xml · nonDerivative · entry 5

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 25,116

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 $100.990 to $101.710 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
June 09, 2026 Filed Jun 11, 2026 00:36 UTC BillionToOne, Inc. BLLN · Entity 3992 SaleClass A Common Stock 4,666 $99.27 $463,203.62
Disclosure

SEC source: 0002070849-26-000036 · wk-form4_1781138180.xml · nonDerivative · entry 4

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 27,816

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 $98.900 to $99.870 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
June 08, 2026 Filed Jun 11, 2026 00:36 UTC BillionToOne, Inc. BLLN · Entity 3992 SaleClass A Common Stock 200 $100.99 $20,197.00
Disclosure

SEC source: 0002070849-26-000036 · wk-form4_1781138180.xml · nonDerivative · entry 3

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 32,482

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 $100.980 to $100.990 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
June 08, 2026 Filed Jun 11, 2026 00:36 UTC BillionToOne, Inc. BLLN · Entity 3992 SaleClass A Common Stock 300 $100.05 $30,015.00
Disclosure

SEC source: 0002070849-26-000036 · wk-form4_1781138180.xml · nonDerivative · entry 2

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 32,682

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 $99.960 to $100.220 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
June 08, 2026 Filed Jun 11, 2026 00:36 UTC BillionToOne, Inc. BLLN · Entity 3992 SaleClass A Common Stock 2,918 $99.09 $289,135.28
Disclosure

SEC source: 0002070849-26-000036 · wk-form4_1781138180.xml · nonDerivative · entry 1

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 32,982

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 $98.900 to $99.690 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
November 07, 2025 Filed Nov 12, 2025 23:07 UTC BillionToOne, Inc. BLLN · Entity 3992 OtherStock Option (right to buy) · Derivative 40,000 Not disclosed Strike: $30.78 Not disclosed
Disclosure

SEC source: 0001193125-25-278118 · ownership.xml · derivative · entry 15

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,000

Underlying: Class A Common Stock · 40,000 shares

Expires 2035-09-30

F1 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F1 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F6 · derivative.exercise_date: The options are subject to a service-based vesting requirement, which shall be satisfied over a four-year period. The options vest and become exercisable in equal monthly installments commencing on September 15, 2025, subject to the Reporting Person's continuous service with the Issuer through each such vesting date.

Read SEC document
November 07, 2025 Filed Nov 12, 2025 23:07 UTC BillionToOne, Inc. BLLN · Entity 3992 OtherStock Option (right to buy) · Derivative 40,000 Not disclosed Strike: $30.78 Not disclosed
Disclosure

SEC source: 0001193125-25-278118 · ownership.xml · derivative · entry 14

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 40,000 shares

Expires 2035-09-30

F1 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F1 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F6 · derivative.exercise_date: The options are subject to a service-based vesting requirement, which shall be satisfied over a four-year period. The options vest and become exercisable in equal monthly installments commencing on September 15, 2025, subject to the Reporting Person's continuous service with the Issuer through each such vesting date.

Read SEC document
November 07, 2025 Filed Nov 12, 2025 23:07 UTC BillionToOne, Inc. BLLN · Entity 3992 OtherStock Option (right to buy) · Derivative 20,000 Not disclosed Strike: $17.12 Not disclosed
Disclosure

SEC source: 0001193125-25-278118 · ownership.xml · derivative · entry 13

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,000

Underlying: Class A Common Stock · 20,000 shares

Expires 2034-10-16

F1 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F1 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F5 · derivative.exercise_date: The options are subject to a service-based vesting requirement, which shall be satisfied over a four-year period. The options vest and become exercisable in equal monthly installments commencing on October 6, 2024, subject to the Reporting Person's continuous service with the Issuer through each such vesting date.

Read SEC document
November 07, 2025 Filed Nov 12, 2025 23:07 UTC BillionToOne, Inc. BLLN · Entity 3992 OtherStock Option (right to buy) · Derivative 20,000 Not disclosed Strike: $17.12 Not disclosed
Disclosure

SEC source: 0001193125-25-278118 · ownership.xml · derivative · entry 12

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 20,000 shares

Expires 2034-10-16

F1 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F1 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F5 · derivative.exercise_date: The options are subject to a service-based vesting requirement, which shall be satisfied over a four-year period. The options vest and become exercisable in equal monthly installments commencing on October 6, 2024, subject to the Reporting Person's continuous service with the Issuer through each such vesting date.

Read SEC document
November 07, 2025 Filed Nov 12, 2025 23:07 UTC BillionToOne, Inc. BLLN · Entity 3992 OtherStock Option (right to buy) · Derivative 40,000 Not disclosed Strike: $11.55 Not disclosed
Disclosure

SEC source: 0001193125-25-278118 · ownership.xml · derivative · entry 11

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,000

Underlying: Class A Common Stock · 40,000 shares

Expires 2033-10-17

F1 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F1 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F4 · derivative.exercise_date: The options are subject to a service-based vesting requirement, which shall be satisfied over a four-year period. The options vest and become exercisable in equal monthly installments commencing on October 1, 2023, subject to the Reporting Person's continuous service with the Issuer through each such vesting date.

Read SEC document
November 07, 2025 Filed Nov 12, 2025 23:07 UTC BillionToOne, Inc. BLLN · Entity 3992 OtherStock Option (right to buy) · Derivative 40,000 Not disclosed Strike: $11.55 Not disclosed
Disclosure

SEC source: 0001193125-25-278118 · ownership.xml · derivative · entry 10

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 40,000 shares

Expires 2033-10-17

F1 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F1 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F4 · derivative.exercise_date: The options are subject to a service-based vesting requirement, which shall be satisfied over a four-year period. The options vest and become exercisable in equal monthly installments commencing on October 1, 2023, subject to the Reporting Person's continuous service with the Issuer through each such vesting date.

Read SEC document
November 07, 2025 Filed Nov 12, 2025 23:07 UTC BillionToOne, Inc. BLLN · Entity 3992 OtherStock Option (right to buy) · Derivative 25,000 Not disclosed Strike: $2.80 Not disclosed
Disclosure

SEC source: 0001193125-25-278118 · ownership.xml · derivative · entry 9

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,000

Underlying: Class A Common Stock · 25,000 shares

Expires 2031-10-14

F1 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F1 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F3 · derivative.exercise_date: The options are fully vested and exercisable.

Read SEC document
November 07, 2025 Filed Nov 12, 2025 23:07 UTC BillionToOne, Inc. BLLN · Entity 3992 OtherStock Option (right to buy) · Derivative 25,000 Not disclosed Strike: $2.80 Not disclosed
Disclosure

SEC source: 0001193125-25-278118 · ownership.xml · derivative · entry 8

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 25,000 shares

Expires 2031-10-14

F1 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F1 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F3 · derivative.exercise_date: The options are fully vested and exercisable.

Read SEC document
November 07, 2025 Filed Nov 12, 2025 23:07 UTC BillionToOne, Inc. BLLN · Entity 3992 OtherStock Option (right to buy) · Derivative 25,000 Not disclosed Strike: $2.80 Not disclosed
Disclosure

SEC source: 0001193125-25-278118 · ownership.xml · derivative · entry 7

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,000

Underlying: Class A Common Stock · 25,000 shares

Expires 2031-06-07

F1 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F1 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F3 · derivative.exercise_date: The options are fully vested and exercisable.

Read SEC document
November 07, 2025 Filed Nov 12, 2025 23:07 UTC BillionToOne, Inc. BLLN · Entity 3992 OtherStock Option (right to buy) · Derivative 25,000 Not disclosed Strike: $2.80 Not disclosed
Disclosure

SEC source: 0001193125-25-278118 · ownership.xml · derivative · entry 6

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 25,000 shares

Expires 2031-06-07

F1 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F1 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F3 · derivative.exercise_date: The options are fully vested and exercisable.

Read SEC document
November 07, 2025 Filed Nov 12, 2025 23:07 UTC BillionToOne, Inc. BLLN · Entity 3992 OtherStock Option (right to buy) · Derivative 125,000 Not disclosed Strike: $0.45 Not disclosed
Disclosure

SEC source: 0001193125-25-278118 · ownership.xml · derivative · entry 5

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 125,000

Underlying: Class A Common Stock · 125,000 shares

Expires 2029-08-20

F1 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F1 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F3 · derivative.exercise_date: The options are fully vested and exercisable.

Read SEC document
November 07, 2025 Filed Nov 12, 2025 23:07 UTC BillionToOne, Inc. BLLN · Entity 3992 OtherStock Option (right to buy) · Derivative 125,000 Not disclosed Strike: $0.45 Not disclosed
Disclosure

SEC source: 0001193125-25-278118 · ownership.xml · derivative · entry 4

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 125,000 shares

Expires 2029-08-20

F1 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F1 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F3 · derivative.exercise_date: The options are fully vested and exercisable.

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November 07, 2025 Filed Nov 12, 2025 23:07 UTC BillionToOne, Inc. BLLN · Entity 3992 PurchaseClass A Common Stock 6,900 $60.00 $414,000.00
Disclosure

SEC source: 0001193125-25-278118 · ownership.xml · nonDerivative · entry 3

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,900

F2 · kind: These shares of Class A common stock were purchased by the Reporting Person through a directed share program in connection with the Offering.

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November 07, 2025 Filed Nov 12, 2025 23:07 UTC BillionToOne, Inc. BLLN · Entity 3992 OtherClass A Common Stock 29,000 Not disclosed Not disclosed
Disclosure

SEC source: 0001193125-25-278118 · ownership.xml · nonDerivative · entry 2

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,000

F1 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F1 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

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November 07, 2025 Filed Nov 12, 2025 23:07 UTC BillionToOne, Inc. BLLN · Entity 3992 OtherCommon Stock 29,000 Not disclosed Not disclosed
Disclosure

SEC source: 0001193125-25-278118 · ownership.xml · nonDerivative · entry 1

Johnson Nancy JoAnn · CIK 0002087387 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · kind: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

F1 · price: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.