BLLN · BillionToOne, Inc. · Insider Trading

$103.95 -0.72 (-0.69%)

Market Cap

$4.94B

47.19M

Volume · Oct 21 377.73K Avg daily vol (3M) 664.05K

Trades by corporate insiders — officers, directors and holders of more than 10% of the shares — disclosed to the SEC on Forms 4 and 5. Form 3 supplies initial ownership rather than a trade; Form 4 must be filed within two business days of the trade.

Query insider transactions through the insider trading API or MCP →

Date	Insider	Role	Type	Security	Shares	Price	Value	After
2026-10-15	Atay Oguzhan	Director, See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $98.000 to $98.770 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.	Class A Common Stock	900	$98.43	$88,590	4,250
2026-10-15	Atay Oguzhan	Director, See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $99.270 to $100.250 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.	Class A Common Stock	1,861	$99.84	$185,809	2,389
2026-10-15	Atay Oguzhan	Director, See Remarks	Convert↑ Filing footnotes — Class A Common Stock (Direct) 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.	Class A Common Stock	5,150	$2.80	$14,420	5,150
2026-10-15	Atay Oguzhan	Director, See Remarks	Convert↓ Filing footnotes — Stock Option (right to buy) (Direct) The options are fully vested and exercisable.	Stock Option (right to buy)	5,150	$2.80	$14,420	468,629
2026-10-15	Atay Oguzhan	Director, See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $102.765 to $102.830 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.	Class A Common Stock	133	$102.78	$13,669	0
2026-10-15	Atay Oguzhan	Director, See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $100.270 to $101.200 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.	Class A Common Stock	1,276	$100.60	$128,369	1,113
2026-10-15	Atay Oguzhan	Director, See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $101.370 to $102.140 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.	Class A Common Stock	980	$101.79	$99,751	133
2026-10-14	Atay Oguzhan	Director, See Remarks	Convert↓ Filing footnotes — Stock Option (right to buy) (Direct) The options are fully vested and exercisable.	Stock Option (right to buy)	3,183	$2.80	$8,912	473,779
2026-10-14	Atay Oguzhan	Director, See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Indirect) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person's spouse on June 7, 2026. Represents shares held by the Reporting Person's spouse.	Class A Common Stock (I)	2,667	$98.00	$261,366	149,168
2026-10-14	Atay Oguzhan	Director, See Remarks	Convert↑ Filing footnotes — Class A Common Stock (Direct) 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.	Class A Common Stock	3,183	$2.80	$8,912	3,183
2026-10-14	Atay Oguzhan	Director, See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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.	Class A Common Stock	100	$99.00	$9,900	0
2026-10-14	Atay Oguzhan	Director, See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $98.000 to $98.990 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.	Class A Common Stock	3,083	$98.32	$303,120	100
2026-10-13	Lynch Thomas P.	See Remarks	Convert↑	Class A Common Stock	2,000	$8.65	$17,300	10,700
2026-10-13	Lynch Thomas P.	See Remarks	Convert↓ Filing footnotes — Stock Option (right to buy) (Direct) The options are fully vested and exercisable. The terms of the underlying option grant are as previously reported on the Reporting Person's Form 3 filed on November 5, 2025.	Stock Option (right to buy)	2,000	$8.65	$17,300	38,974
2026-10-12	Atay Oguzhan	Director, See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $93.260 to $94.225 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.	Class A Common Stock	6,763	$93.65	$633,335	5,390
2026-10-12	Atay Oguzhan	Director, See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $94.265 to $95.205 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.	Class A Common Stock	3,869	$94.61	$366,059	1,521
2026-10-12	Atay Oguzhan	Director, See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $92.2596 to $93.255 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.	Class A Common Stock	2,553	$93.05	$237,546	12,153
2026-10-12	Atay Oguzhan	Director, See Remarks	Convert↓ Filing footnotes — Stock Option (right to buy) (Direct) The options are fully vested and exercisable.	Stock Option (right to buy)	16,667	$2.80	$46,668	476,962
2026-10-12	Atay Oguzhan	Director, See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Indirect) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person's spouse on June 7, 2026. Represents shares held by the Reporting Person's spouse.	Class A Common Stock (I)	2,667	$97.61	$260,326	151,835
2026-10-12	Atay Oguzhan	Director, See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $91.250 to $92.170 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.	Class A Common Stock	1,961	$91.57	$179,571	14,706
2026-10-12	Atay Oguzhan	Director, See Remarks	Convert↑ Filing footnotes — Class A Common Stock (Direct) 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.	Class A Common Stock	16,667	$2.80	$46,668	16,667
2026-10-12	Atay Oguzhan	Director, See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $95.945 to $96.765 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.	Class A Common Stock	1,521	$96.39	$146,613	0
2026-10-08	Lynch Thomas P.	See Remarks	Convert↑	Class A Common Stock	8,000	$8.65	$69,200	8,700
2026-10-08	Lynch Thomas P.	See Remarks	Convert↓ Filing footnotes — Stock Option (right to buy) (Direct) The options are fully vested and exercisable. The terms of the underlying option grant are as previously reported on the Reporting Person's Form 3 filed on November 5, 2025.	Stock Option (right to buy)	8,000	$8.65	$69,200	40,974
2026-10-05	Tsao David	Director, Chief Technology Officer	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. 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.	Class A Common Stock	4,284	$108.39	$464,356	13,941
2026-10-05	Tsao David	Director, Chief Technology Officer	Convert↓ Filing footnotes — Stock Option (right to buy) (Direct) The options are fully vested and exercisable.	Stock Option (right to buy)	10,000	$2.80	$28,000	546,667
2026-10-05	Tsao David	Director, Chief Technology Officer	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. 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.	Class A Common Stock	2,200	$107.47	$236,435	7,845
2026-10-05	ten Bosch John Roderick	See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Direct) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 2, 2026.	Class A Common Stock	1,417	$105.15	$148,998	19,385
2026-10-05	Tsao David	Director, Chief Technology Officer	Convert↑ Filing footnotes — Class A Common Stock (Direct) 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.	Class A Common Stock	10,000	$2.80	$28,000	11,000
2026-10-05	Tsao David	Director, Chief Technology Officer	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. 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.	Class A Common Stock	866	$105.90	$91,710	20,134
2026-10-05	Tsao David	Director, Chief Technology Officer	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. 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.	Class A Common Stock	1,829	$109.14	$199,625	1,100
2026-10-05	Tsao David	Director, Chief Technology Officer	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. 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.	Class A Common Stock	555	$105.56	$58,585	10,445
2026-10-05	Tsao David	Director, Chief Technology Officer	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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.	Class A Common Stock	100	$110.09	$11,009	1,000
2026-10-05	Tsao David	Director, Chief Technology Officer	Convert↑ Filing footnotes — Class A Common Stock (Direct) 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.	Class A Common Stock	10,000	$2.80	$28,000	21,000
2026-10-05	Tsao David	Director, Chief Technology Officer	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. 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.	Class A Common Stock	1,909	$107.20	$204,635	18,225
2026-10-05	Tsao David	Director, Chief Technology Officer	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. 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.	Class A Common Stock	4,916	$108.53	$533,554	2,929
2026-10-05	ten Bosch John Roderick	See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Direct) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 2, 2026.	Class A Common Stock	1,417	$105.15	$148,998	20,802
2026-10-05	Tsao David	Director, Chief Technology Officer	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. 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.	Class A Common Stock	2,921	$109.00	$318,398	11,020
2026-10-05	Tsao David	Director, Chief Technology Officer	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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. 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.	Class A Common Stock	400	$106.10	$42,442	10,045
2026-10-05	Tsao David	Director, Chief Technology Officer	Convert↓ Filing footnotes — Stock Option (right to buy) (Direct) The options are fully vested and exercisable.	Stock Option (right to buy)	10,000	$2.80	$28,000	536,667
2026-10-05	Tsao David	Director, Chief Technology Officer	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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.	Class A Common Stock	20	$110.08	$2,202	11,000
2026-09-28	Atay Oguzhan	Director, See Remarks	Convert↑ Filing footnotes — Class A Common Stock (Direct) 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.	Class A Common Stock	8,333	$2.80	$23,332	8,333
2026-09-28	Atay Oguzhan	Director, See Remarks	Convert↓ Filing footnotes — Stock Option (right to buy) (Direct) The options are fully vested and exercisable.	Stock Option (right to buy)	8,333	$2.80	$23,332	493,629
2026-09-28	Atay Oguzhan	Director, See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Indirect) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person's spouse on June 7, 2026. Represents shares held by the Reporting Person's spouse.	Class A Common Stock (I)	2,666	$120.64	$321,626	154,502
2026-09-28	Atay Oguzhan	Director, See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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.	Class A Common Stock	8,333	$120.64	$1,005,293	0
2026-09-24	Tsao David	Director, Chief Technology Officer	Convert↑ Filing footnotes — Class A Common Stock (Direct) 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.	Class A Common Stock	3,333	$2.80	$9,332	4,333
2026-09-24	Tsao David	Director, Chief Technology Officer	Sell↓ Filing footnotes — Class A Common Stock (Direct) 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.	Class A Common Stock	3,333	$125.00	$416,625	1,000
2026-09-24	ten Bosch John Roderick	See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Direct) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 2, 2026.	Class A Common Stock	1,416	$120.00	$169,920	22,219
2026-09-24	Tsao David	Director, Chief Technology Officer	Convert↓ Filing footnotes — Stock Option (right to buy) (Direct) The options are fully vested and exercisable.	Stock Option (right to buy)	3,333	$2.80	$9,332	556,667
2026-09-21	ten Bosch John Roderick	See Remarks	Sell↓ Filing footnotes — Class A Common Stock (Direct) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 2, 2026.	Class A Common Stock	1,416	$106.61	$150,960	23,635

Legend Buy — open-market purchase Sell — open-market sale ↑ Shares acquired ↓ Shares disposed (gift, conversion, tax…)

Showing 1–50 of 580 transactions

Key facts CIK 2070849 CUSIP 090168105 13F (30d) 17 filings 17 filers Visit website Investor relations