BLLN

insider transactions

BillionToOne, Inc. — buys & sells by directors, officers and 10% owners (SEC Form 4).

30D 90D 1Y

Net shares · 30d

-75.9K

0 buy · 75.9K sell

Net value · 30d

-$7.5M

$0 in · $7.5M out

Sentiment · 30d

Net selling

0% buying · 100% selling

Open-market trades · 30d

0 buy · 75.9K sell

Net buy / sell volume

Tap or hover the chart for daily net volume. Green = net buying, red = net selling.

All transactions

Exercise·M
Jun 15, 26

David Tsao

Chief Technology Officer · 10b5-1

$28.0K

10.0K sh · $2.80

Own +2%
Sell·S
Jun 15, 26

David Tsao

Chief Technology Officer · 10b5-1

$58.7K

563 sh · $104.32

Own -36%
Sell·S
Jun 15, 26

David Tsao

Chief Technology Officer · 10b5-1

$248.5K

2.4K sh · $103.63

Own -61%
Sell·S
Jun 15, 26

David Tsao

Chief Technology Officer · 10b5-1

$305.5K

3.0K sh · $102.60

Own -43%
Sell·S
Jun 15, 26

David Tsao

Chief Technology Officer · 10b5-1

$249.5K

2.5K sh · $101.37

Own -26%
Sell·S
Jun 15, 26

David Tsao

Chief Technology Officer · 10b5-1

$100.1K

1.0K sh · $100.05

Own -10%
Sell·S
Jun 15, 26

David Tsao

Chief Technology Officer · 10b5-1

$59.2K

600 sh · $98.74

Own -5%
Sell·S
Jun 15, 26

David Tsao

Chief Technology Officer · 10b5-1

$24.0K

230 sh · $104.47

Own -2%
Sell·S
Jun 15, 26

David Tsao

Chief Technology Officer · 10b5-1

$299.5K

2.9K sh · $103.68

Own -20%
Sell·S
Jun 15, 26

David Tsao

Chief Technology Officer · 10b5-1

$289.4K

2.8K sh · $102.77

Own -17%
Sell·S
Jun 15, 26

David Tsao

Chief Technology Officer · 10b5-1

$239.8K

2.4K sh · $101.55

Own -12%
Sell·S
Jun 15, 26

David Tsao

Chief Technology Officer · 10b5-1

$171.0K

1.7K sh · $100.37

Own -8%
Exercise·M
Jun 15, 26

David Tsao

Chief Technology Officer · 10b5-1

$28.0K

10.0K sh · $2.80

Own +1000%
Sell·S
Jun 15, 26

John Roderick Ten Bosch KEY

Senior Vice President of Labo… · 10b5-1

$143.7K

1.4K sh · $101.47

Own -4%
Grant·A
Jun 10, 26

Anthony Pagano

Director

$0

3.0K sh

Own +62%
Grant·A
Jun 10, 26

Firat Ileri

Director, 10% Owner

$0

3.0K sh

Own +8%
Grant·A
Jun 10, 26

Akshay Rai

Director

$0

3.0K sh

Own +27%
Grant·A
Jun 10, 26

Krishna Kittu Kolluri

Director, 10% Owner

$0

3.0K sh

Own +36%
Grant·A
Jun 10, 26

Thomas S Bremner

Director

$0

3.0K sh

Own +36%
Sell·S
Jun 9, 26

Nancy Joann Johnson KEY

Senior Vice President of Sale… · 10b5-1

$140.4K

1.4K sh · $100.31

Own -6%
Sell·S
Jun 9, 26

Nancy Joann Johnson KEY

Senior Vice President of Sale… · 10b5-1

$185.8K

1.8K sh · $102.34

Own -7%
Sell·S
Jun 9, 26

Nancy Joann Johnson KEY

Senior Vice President of Sale… · 10b5-1

$273.7K

2.7K sh · $101.38

Own -10%
Sell·S
Jun 9, 26

Nancy Joann Johnson KEY

Senior Vice President of Sale… · 10b5-1

$463.2K

4.7K sh · $99.27

Own -14%
Other·G
Jun 9, 26

Oguzhan Atay KEY

Chairman and Chief Executive … · 10b5-1

$0

10.0K sh

Own -100%
Other·J
Jun 9, 26

Krishna Kittu Kolluri

Director

$0

5.6K sh
Other·J
Jun 9, 26

Krishna Kittu Kolluri

Director

$0

2.2K sh
Other·J
Jun 9, 26

Krishna Kittu Kolluri

Director

$0

1.2K sh
Other·J
Jun 9, 26

Krishna Kittu Kolluri

Director

$0

5.8K sh
Other·J
Jun 9, 26

Krishna Kittu Kolluri

Director

$0

719 sh
Other·J
Jun 9, 26

Krishna Kittu Kolluri

Director

$0

10.9K sh
Other·J
Jun 9, 26

Krishna Kittu Kolluri

Director

$0

5.4K sh
Other·J
Jun 9, 26

Krishna Kittu Kolluri

Director

$0

271.0K sh
Other·J
Jun 9, 26

Krishna Kittu Kolluri

Director

$0

1.4K sh
Other·J
Jun 9, 26

Krishna Kittu Kolluri

Director

$0

24.2K sh
Other·J
Jun 9, 26

Krishna Kittu Kolluri

Director

$0

8.0K sh
Other·J
Jun 9, 26

Krishna Kittu Kolluri

Director

$0

129.8K sh
Other·J
Jun 9, 26

NeoTribe Ventures I, L.P. / Neotribe Ignite Fund I, L.P. / Neotribe SPV I BTO, LLC / NeoTribe Associates I, L.P. / Neotribe Ignite Partners I, LLC / Neotribe Partners SPV I BTO, LLC / NeoTribe Partners I, LLC

10% Owner

$0

10.9K sh
Other·J
Jun 9, 26

NeoTribe Ventures I, L.P. / Neotribe Ignite Fund I, L.P. / Neotribe SPV I BTO, LLC / NeoTribe Associates I, L.P. / Neotribe Ignite Partners I, LLC / Neotribe Partners SPV I BTO, LLC / NeoTribe Partners I, LLC

10% Owner

$0

5.4K sh
Other·J
Jun 9, 26

NeoTribe Ventures I, L.P. / Neotribe Ignite Fund I, L.P. / Neotribe SPV I BTO, LLC / NeoTribe Associates I, L.P. / Neotribe Ignite Partners I, LLC / Neotribe Partners SPV I BTO, LLC / NeoTribe Partners I, LLC

10% Owner

$0

271.0K sh
Other·J
Jun 9, 26

NeoTribe Ventures I, L.P. / Neotribe Ignite Fund I, L.P. / Neotribe SPV I BTO, LLC / NeoTribe Associates I, L.P. / Neotribe Ignite Partners I, LLC / Neotribe Partners SPV I BTO, LLC / NeoTribe Partners I, LLC

10% Owner

$0

1.4K sh
Other·J
Jun 9, 26

NeoTribe Ventures I, L.P. / Neotribe Ignite Fund I, L.P. / Neotribe SPV I BTO, LLC / NeoTribe Associates I, L.P. / Neotribe Ignite Partners I, LLC / Neotribe Partners SPV I BTO, LLC / NeoTribe Partners I, LLC

10% Owner

$0

24.2K sh
Other·J
Jun 9, 26

NeoTribe Ventures I, L.P. / Neotribe Ignite Fund I, L.P. / Neotribe SPV I BTO, LLC / NeoTribe Associates I, L.P. / Neotribe Ignite Partners I, LLC / Neotribe Partners SPV I BTO, LLC / NeoTribe Partners I, LLC

10% Owner

$0

8.0K sh
Other·J
Jun 9, 26

NeoTribe Ventures I, L.P. / Neotribe Ignite Fund I, L.P. / Neotribe SPV I BTO, LLC / NeoTribe Associates I, L.P. / Neotribe Ignite Partners I, LLC / Neotribe Partners SPV I BTO, LLC / NeoTribe Partners I, LLC

10% Owner

$0

129.8K sh
Sell·S
Jun 8, 26

Shan Riku Sakakibara

Chief Product Officer · 10b5-1

$400.0K

4.0K sh · $100.00

Own -2%
Sell·S
Jun 8, 26

Shan Riku Sakakibara

Chief Product Officer · 10b5-1

$385.8K

4.0K sh · $96.45

Own -2%
Sell·S
Jun 8, 26

Nancy Joann Johnson KEY

Senior Vice President of Sale… · 10b5-1

$20.2K

200 sh · $100.99

Own -1%
Sell·S
Jun 8, 26

Nancy Joann Johnson KEY

Senior Vice President of Sale… · 10b5-1

$30.0K

300 sh · $100.05

Own -1%
Sell·S
Jun 8, 26

Nancy Joann Johnson KEY

Senior Vice President of Sale… · 10b5-1

$289.1K

2.9K sh · $99.09

Own -8%
Exercise·C
Jun 8, 26

Oguzhan Atay KEY

Chairman and Chief Executive … · 10b5-1

$0

10.0K sh

Own +0%
Exercise·M
Jun 8, 26

Oguzhan Atay KEY

Chairman and Chief Executive … · 10b5-1

$17.5K

6.2K sh · $2.80

Own +1%
Exercise·M
Jun 8, 26

Oguzhan Atay KEY

Chairman and Chief Executive … · 10b5-1

$56.0K

20.0K sh · $2.80

Own +3%
Sell·S
Jun 8, 26

Oguzhan Atay KEY

Chairman and Chief Executive … · 10b5-1

$602.8K

6.2K sh · $96.45

Own -3%
Exercise·C
Jun 8, 26

Oguzhan Atay KEY

Chairman and Chief Executive … · 10b5-1

$0

10.0K sh

Own New
Sell·S
Jun 8, 26

Oguzhan Atay KEY

Chairman and Chief Executive … · 10b5-1

$625.0K

6.2K sh · $100.00

Own -100%
Sell·S
Jun 8, 26

Oguzhan Atay KEY

Chairman and Chief Executive … · 10b5-1

$55.6K

556 sh · $99.97

Own -8%
Sell·S
Jun 8, 26

Oguzhan Atay KEY

Chairman and Chief Executive … · 10b5-1

$357.1K

3.6K sh · $99.06

Own -35%
Sell·S
Jun 8, 26

Oguzhan Atay KEY

Chairman and Chief Executive … · 10b5-1

$399.0K

4.1K sh · $98.12

Own -28%
Sell·S
Jun 8, 26

Oguzhan Atay KEY

Chairman and Chief Executive … · 10b5-1

$423.6K

4.4K sh · $96.89

Own -23%
Sell·S
Jun 8, 26

Oguzhan Atay KEY

Chairman and Chief Executive … · 10b5-1

$177.4K

1.9K sh · $95.59

Own -9%
Sell·S
Jun 8, 26

Oguzhan Atay KEY

Chairman and Chief Executive … · 10b5-1

$518.0K

5.5K sh · $94.76

Own -21%
Sell·S
Jun 8, 26

Oguzhan Atay KEY

Chairman and Chief Executive … · 10b5-1

$8.0K

79 sh · $100.87

Own -0%
Exercise·M
Jun 8, 26

Oguzhan Atay KEY

Chairman and Chief Executive … · 10b5-1

$17.5K

6.2K sh · $2.80

Own +31%
Exercise·M
Jun 8, 26

Oguzhan Atay KEY

Chairman and Chief Executive … · 10b5-1

$56.0K

20.0K sh · $2.80

Own New

Date▾	Insider	Role	Type	Shares	Own Δ	Price	Value
Jun 15, 2026	David Tsao 10b5-1	Chief Technology Officer	Exercise M	10.0K	+2%	$2.80	$28.0K
Jun 15, 2026	David Tsao 10b5-1	Chief Technology Officer	Sell S	563	-36%	$104.32	$58.7K
Jun 15, 2026	David Tsao 10b5-1	Chief Technology Officer	Sell S	2.4K	-61%	$103.63	$248.5K
Jun 15, 2026	David Tsao 10b5-1	Chief Technology Officer	Sell S	3.0K	-43%	$102.60	$305.5K
Jun 15, 2026	David Tsao 10b5-1	Chief Technology Officer	Sell S	2.5K	-26%	$101.37	$249.5K
Jun 15, 2026	David Tsao 10b5-1	Chief Technology Officer	Sell S	1.0K	-10%	$100.05	$100.1K
Jun 15, 2026	David Tsao 10b5-1	Chief Technology Officer	Sell S	600	-5%	$98.74	$59.2K
Jun 15, 2026	David Tsao 10b5-1	Chief Technology Officer	Sell S	230	-2%	$104.47	$24.0K
Jun 15, 2026	David Tsao 10b5-1	Chief Technology Officer	Sell S	2.9K	-20%	$103.68	$299.5K
Jun 15, 2026	David Tsao 10b5-1	Chief Technology Officer	Sell S	2.8K	-17%	$102.77	$289.4K
Jun 15, 2026	David Tsao 10b5-1	Chief Technology Officer	Sell S	2.4K	-12%	$101.55	$239.8K
Jun 15, 2026	David Tsao 10b5-1	Chief Technology Officer	Sell S	1.7K	-8%	$100.37	$171.0K
Jun 15, 2026	David Tsao 10b5-1	Chief Technology Officer	Exercise M	10.0K	+1000%	$2.80	$28.0K
Jun 15, 2026	John Roderick Ten Bosch KEY 10b5-1	Senior Vice President of Laboratory Operations	Sell S	1.4K	-4%	$101.47	$143.7K
Jun 10, 2026	Anthony Pagano	Director	Grant A	3.0K	+62%	—	$0
Jun 10, 2026	Firat Ileri	Director, 10% Owner	Grant A	3.0K	+8%	—	$0
Jun 10, 2026	Akshay Rai	Director	Grant A	3.0K	+27%	—	$0
Jun 10, 2026	Krishna Kittu Kolluri	Director, 10% Owner	Grant A	3.0K	+36%	—	$0
Jun 10, 2026	Thomas S Bremner	Director	Grant A	3.0K	+36%	—	$0
Jun 9, 2026	Nancy Joann Johnson KEY 10b5-1	Senior Vice President of Sales and Commercial Operations	Sell S	1.4K	-6%	$100.31	$140.4K
Jun 9, 2026	Nancy Joann Johnson KEY 10b5-1	Senior Vice President of Sales and Commercial Operations	Sell S	1.8K	-7%	$102.34	$185.8K
Jun 9, 2026	Nancy Joann Johnson KEY 10b5-1	Senior Vice President of Sales and Commercial Operations	Sell S	2.7K	-10%	$101.38	$273.7K
Jun 9, 2026	Nancy Joann Johnson KEY 10b5-1	Senior Vice President of Sales and Commercial Operations	Sell S	4.7K	-14%	$99.27	$463.2K
Jun 9, 2026	Oguzhan Atay KEY 10b5-1	Chairman and Chief Executive Officer	Other G	10.0K	-100%	—	$0
Jun 9, 2026	Krishna Kittu Kolluri	Director	Other J	5.6K	—	—	$0
Jun 9, 2026	Krishna Kittu Kolluri	Director	Other J	2.2K	—	—	$0
Jun 9, 2026	Krishna Kittu Kolluri	Director	Other J	1.2K	—	—	$0
Jun 9, 2026	Krishna Kittu Kolluri	Director	Other J	5.8K	—	—	$0
Jun 9, 2026	Krishna Kittu Kolluri	Director	Other J	719	—	—	$0
Jun 9, 2026	Krishna Kittu Kolluri	Director	Other J	10.9K	—	—	$0
Jun 9, 2026	Krishna Kittu Kolluri	Director	Other J	5.4K	—	—	$0
Jun 9, 2026	Krishna Kittu Kolluri	Director	Other J	271.0K	—	—	$0
Jun 9, 2026	Krishna Kittu Kolluri	Director	Other J	1.4K	—	—	$0
Jun 9, 2026	Krishna Kittu Kolluri	Director	Other J	24.2K	—	—	$0
Jun 9, 2026	Krishna Kittu Kolluri	Director	Other J	8.0K	—	—	$0
Jun 9, 2026	Krishna Kittu Kolluri	Director	Other J	129.8K	—	—	$0
Jun 9, 2026	NeoTribe Ventures I, L.P. / Neotribe Ignite Fund I, L.P. / Neotribe SPV I BTO, LLC / NeoTribe Associates I, L.P. / Neotribe Ignite Partners I, LLC / Neotribe Partners SPV I BTO, LLC / NeoTribe Partners I, LLC	10% Owner	Other J	10.9K	—	—	$0
Jun 9, 2026	NeoTribe Ventures I, L.P. / Neotribe Ignite Fund I, L.P. / Neotribe SPV I BTO, LLC / NeoTribe Associates I, L.P. / Neotribe Ignite Partners I, LLC / Neotribe Partners SPV I BTO, LLC / NeoTribe Partners I, LLC	10% Owner	Other J	5.4K	—	—	$0
Jun 9, 2026	NeoTribe Ventures I, L.P. / Neotribe Ignite Fund I, L.P. / Neotribe SPV I BTO, LLC / NeoTribe Associates I, L.P. / Neotribe Ignite Partners I, LLC / Neotribe Partners SPV I BTO, LLC / NeoTribe Partners I, LLC	10% Owner	Other J	271.0K	—	—	$0
Jun 9, 2026	NeoTribe Ventures I, L.P. / Neotribe Ignite Fund I, L.P. / Neotribe SPV I BTO, LLC / NeoTribe Associates I, L.P. / Neotribe Ignite Partners I, LLC / Neotribe Partners SPV I BTO, LLC / NeoTribe Partners I, LLC	10% Owner	Other J	1.4K	—	—	$0
Jun 9, 2026	NeoTribe Ventures I, L.P. / Neotribe Ignite Fund I, L.P. / Neotribe SPV I BTO, LLC / NeoTribe Associates I, L.P. / Neotribe Ignite Partners I, LLC / Neotribe Partners SPV I BTO, LLC / NeoTribe Partners I, LLC	10% Owner	Other J	24.2K	—	—	$0
Jun 9, 2026	NeoTribe Ventures I, L.P. / Neotribe Ignite Fund I, L.P. / Neotribe SPV I BTO, LLC / NeoTribe Associates I, L.P. / Neotribe Ignite Partners I, LLC / Neotribe Partners SPV I BTO, LLC / NeoTribe Partners I, LLC	10% Owner	Other J	8.0K	—	—	$0
Jun 9, 2026	NeoTribe Ventures I, L.P. / Neotribe Ignite Fund I, L.P. / Neotribe SPV I BTO, LLC / NeoTribe Associates I, L.P. / Neotribe Ignite Partners I, LLC / Neotribe Partners SPV I BTO, LLC / NeoTribe Partners I, LLC	10% Owner	Other J	129.8K	—	—	$0
Jun 8, 2026	Shan Riku Sakakibara 10b5-1	Chief Product Officer	Sell S	4.0K	-2%	$100.00	$400.0K
Jun 8, 2026	Shan Riku Sakakibara 10b5-1	Chief Product Officer	Sell S	4.0K	-2%	$96.45	$385.8K
Jun 8, 2026	Nancy Joann Johnson KEY 10b5-1	Senior Vice President of Sales and Commercial Operations	Sell S	200	-1%	$100.99	$20.2K
Jun 8, 2026	Nancy Joann Johnson KEY 10b5-1	Senior Vice President of Sales and Commercial Operations	Sell S	300	-1%	$100.05	$30.0K
Jun 8, 2026	Nancy Joann Johnson KEY 10b5-1	Senior Vice President of Sales and Commercial Operations	Sell S	2.9K	-8%	$99.09	$289.1K
Jun 8, 2026	Oguzhan Atay KEY 10b5-1	Chairman and Chief Executive Officer	Exercise C	10.0K	+0%	—	$0
Jun 8, 2026	Oguzhan Atay KEY 10b5-1	Chairman and Chief Executive Officer	Exercise M	6.2K	+1%	$2.80	$17.5K
Jun 8, 2026	Oguzhan Atay KEY 10b5-1	Chairman and Chief Executive Officer	Exercise M	20.0K	+3%	$2.80	$56.0K
Jun 8, 2026	Oguzhan Atay KEY 10b5-1	Chairman and Chief Executive Officer	Sell S	6.2K	-3%	$96.45	$602.8K
Jun 8, 2026	Oguzhan Atay KEY 10b5-1	Chairman and Chief Executive Officer	Exercise C	10.0K	New	—	$0
Jun 8, 2026	Oguzhan Atay KEY 10b5-1	Chairman and Chief Executive Officer	Sell S	6.2K	-100%	$100.00	$625.0K
Jun 8, 2026	Oguzhan Atay KEY 10b5-1	Chairman and Chief Executive Officer	Sell S	556	-8%	$99.97	$55.6K
Jun 8, 2026	Oguzhan Atay KEY 10b5-1	Chairman and Chief Executive Officer	Sell S	3.6K	-35%	$99.06	$357.1K
Jun 8, 2026	Oguzhan Atay KEY 10b5-1	Chairman and Chief Executive Officer	Sell S	4.1K	-28%	$98.12	$399.0K
Jun 8, 2026	Oguzhan Atay KEY 10b5-1	Chairman and Chief Executive Officer	Sell S	4.4K	-23%	$96.89	$423.6K
Jun 8, 2026	Oguzhan Atay KEY 10b5-1	Chairman and Chief Executive Officer	Sell S	1.9K	-9%	$95.59	$177.4K
Jun 8, 2026	Oguzhan Atay KEY 10b5-1	Chairman and Chief Executive Officer	Sell S	5.5K	-21%	$94.76	$518.0K
Jun 8, 2026	Oguzhan Atay KEY 10b5-1	Chairman and Chief Executive Officer	Sell S	79	-0%	$100.87	$8.0K
Jun 8, 2026	Oguzhan Atay KEY 10b5-1	Chairman and Chief Executive Officer	Exercise M	6.2K	+31%	$2.80	$17.5K
Jun 8, 2026	Oguzhan Atay KEY 10b5-1	Chairman and Chief Executive Officer	Exercise M	20.0K	New	$2.80	$56.0K

About BLLN insider trading

This page tracks insider transactions for BillionToOne, Inc. (BLLN) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.