United States Biotechnology & Medical Research

BillionToOne Inc (BLLN)

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In the last 90 days, BillionToOne Inc. saw two proposed sales totaling $1.47 million, primarily by a family member and an officer/director. This contrasts with earlier buying activity in November 2025, where multiple insiders, including Thomas S. Bremner and David Tsao, purchased shares. The company's stock has seen a 38.4% increase over the past 90 days.

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Ticker: BLLN Exchange: NSM

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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings

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Trades

Johnson Nancy JoAnn

Officer

1 sale — total 100,000 USD

Proposed sale 9 Jun 2026

Value US$2,260,542.14 | Price 467.88 | Shares 41,803

Atay Oguzhan

Officer; Director

3 sales — total 300,000 USD

Proposed sale 8 Jun 2026

Value US$3,241,160.90 | Price 436.07 | Shares 22,462

Proposed sale 8 Jun 2026

Value US$2,620,370.63 | Price 370.26 | Shares 87,945

Proposed sale 8 Jun 2026

Value US$100,000.00 | Price 98.23 | Shares 1,000

Johnson Nancy JoAnn

Officer

1 sale — total 100,000 USD

Proposed sale 8 Jun 2026

Value US$100,000.00 | Price 99.28 | Shares 1,000

Sakakibara Shan Riku

Officer

1 sale — total 100,000 USD

Proposed sale 8 Jun 2026

Value US$100,000.00 | Price 98.23 | Shares 1,000

Tsao David

Chief Technology Officer

1 purchase — total 60,000 USD

Buy 7 Nov 2025

Value US$60,000.00 | Price 60.00 | Shares 1,000

Lynch Thomas P.

See Remarks

1 purchase — total 6,000 USD

Buy 7 Nov 2025

Value US$6,000.00 | Price 60.00 | Shares 100

ten Bosch John Roderick

See Remarks

1 purchase — total 48,000 USD

Buy 7 Nov 2025

Value US$48,000.00 | Price 60.00 | Shares 800

Rai Akshay

1 purchase — total 150,000 USD

Buy 7 Nov 2025

Value US$150,000.00 | Price 60.00 | Shares 2,500

Johnson Nancy JoAnn

See Remarks

1 purchase — total 414,000 USD

Buy 7 Nov 2025

Value US$414,000.00 | Price 60.00 | Shares 6,900

Bremner Thomas S

6 purchases — total 2,499,960 USD

Buy 7 Nov 2025

Value US$1,067,460.00 | Price 60.00 | Shares 17,791

Buy 7 Nov 2025

Value US$412,020.00 | Price 60.00 | Shares 6,867

Buy 7 Nov 2025

Value US$326,760.00 | Price 60.00 | Shares 5,446

Buy 7 Nov 2025

Value US$207,720.00 | Price 60.00 | Shares 3,462

Buy 7 Nov 2025

Value US$245,040.00 | Price 60.00 | Shares 4,084

Buy 7 Nov 2025

Value US$240,960.00 | Price 60.00 | Shares 4,016

Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other

Notification date	Transaction date	B/S Transaction type	Insider and/or position	Nb. shares Price Value	Number of shares	Price	Value
2026-06-09	2026-06-09	PrS Proposed sale	Johnson Nancy JoAnn Officer Officer	41,803 467.88 US$2,260,542	41,803	467.88	US$2,260,542
2026-06-08	2026-06-08	PrS Proposed sale	Atay Oguzhan Officer; Director Executive Director	22,462 436.07 US$3,241,161	22,462	436.07	US$3,241,161
2026-06-08	2026-06-08	PrS Proposed sale	Johnson Nancy JoAnn Officer Officer	49,423 99.07 US$4,746,262	49,423	99.07	US$4,746,262
2026-06-08	2026-06-08	PrS Proposed sale	Sakakibara Shan Riku Officer Officer	1,000 98.23 US$100,000	1,000	98.23	US$100,000
2026-06-08	2026-06-08	PrS Proposed sale	Atay Oguzhan Officer; Director Executive Director	1,000 98.23 US$100,000	1,000	98.23	US$100,000
2026-06-08	2026-06-08	PrS Proposed sale	Atay Oguzhan Member of immediate family of any of the foregoing	1,000 98.23 US$100,000	1,000	98.23	US$100,000
2025-11-12	2025-11-07	B Purchase	Tsao David Chief Technology Officer Executive Director	1,000 +inf% 60.00 US$60,000	1,000 +inf%	60.00	US$60,000
2025-11-12	2025-11-07	B Purchase	Lynch Thomas P. See Remarks Officer	100 +16.7% 60.00 US$6,000	100 +16.7%	60.00	US$6,000
2025-11-12	2025-11-07	B Purchase	ten Bosch John Roderick See Remarks Officer	800 +2.2% 60.00 US$48,000	800 +2.2%	60.00	US$48,000
2025-11-12	2025-11-07	B Purchase	Rai Akshay Non-Executive Director	2,500 +22.7% 60.00 US$150,000	2,500 +22.7%	60.00	US$150,000
2025-11-12	2025-11-07	B Purchase	Johnson Nancy JoAnn See Remarks Officer	6,900 +23.8% 60.00 US$414,000	6,900 +23.8%	60.00	US$414,000
2025-11-10	2025-11-07	B Purchase	Bremner Thomas S Non-Executive Director	17,791 +2.6% 60.00 US$1,067,460	17,791 +2.6%	60.00	US$1,067,460
2025-11-10	2025-11-07	B Purchase	Bremner Thomas S Non-Executive Director	6,867 +2.9% 60.00 US$412,020	6,867 +2.9%	60.00	US$412,020
2025-11-10	2025-11-07	B Purchase	Bremner Thomas S Non-Executive Director	5,446 +2.0% 60.00 US$326,760	5,446 +2.0%	60.00	US$326,760
2025-11-10	2025-11-07	B Purchase	Bremner Thomas S Non-Executive Director	3,462 +2.0% 60.00 US$207,720	3,462 +2.0%	60.00	US$207,720
2025-11-10	2025-11-07	B Purchase	Bremner Thomas S Non-Executive Director	4,084 +2.6% 60.00 US$245,040	4,084 +2.6%	60.00	US$245,040
2025-11-10	2025-11-07	B Purchase	Bremner Thomas S Non-Executive Director	4,016 +2.6% 60.00 US$240,960	4,016 +2.6%	60.00	US$240,960