TEN BOSCH JOHN RODERICK (See Remarks) purchased 2.2% of their position (800.00 shares) of BILLIONTOONE, INC. on the open market

Open‑market purchase worth $48.0K — a small addition. The strongest form of insider conviction signal.

P · 1 purchase

TEN BOSCH JOHN RODERICK

Filed: 11/12/2025ACC: 0001193125-25-278131

InsiderTEN BOSCH JOHN RODERICKCIK 2087126

→

IssuerBILLIONTOONE, INC.CIK 2070849

Officer· See Remarks

Since Nov 2025

+800.00

Net shares

Net buyer

$48.0K

Total acquired

Open market trades

1B · 0S

Total transactions

168.80K acquired · 168K disposed

Non-Derivative Transactions3

Common Stock

Direct

J · J

−37K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

37K→0.00

Class A Common Stock

Direct

J · J

+37K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→37K

Class A Common Stock

Direct

P · Purchase

+800.00

Price / share

$60.00

Trade value

$48K

% of position

2.2%

11/7/2025

37K→37.80K

Total

Net shares

+800.00

Net value

$48K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	11/7/2025	J · J	−37K	—	—	New position	37K	0.00
Class A Common Stock Direct	11/7/2025	J · J	+37K	—	—	New position	0.00	37K
Class A Common Stock Direct	11/7/2025	P · Purchase	+800.00	$60.00	$48K	2.2%	37K	37.80K
Total			+800.00		$48K

Derivative Transactions10

Stock Option (right to buy)

Direct

J · J

Converts to

Common Stock

28.50K shares

−28.50K

Strike price

0.56

Held after

0.00

Exercisable

—

11/7/2025

Stock Option (right to buy)

Direct

J · J

Converts to

Class A Common Stock

28.50K shares

+28.50K

Strike price

0.56

Held after

28.50K

Exercisable

—

11/7/2025

Stock Option (right to buy)

Direct

J · J

Converts to

Common Stock

20K shares

−20K

Strike price

2.8

Held after

0.00

Exercisable

—

11/7/2025

Stock Option (right to buy)

Direct

J · J

Converts to

Class A Common Stock

20K shares

+20K

Strike price

2.8

Held after

20K

Exercisable

—

11/7/2025

Stock Option (right to buy)

Direct

J · J

Converts to

Common Stock

15K shares

−15K

Strike price

10.92

Held after

0.00

Exercisable

—

11/7/2025

Stock Option (right to buy)

Direct

J · J

Converts to

Class A Common Stock

15K shares

+15K

Strike price

10.92

Held after

15K

Exercisable

—

11/7/2025

Stock Option (right to buy)

Direct

J · J

Converts to

Common Stock

30K shares

−30K

Strike price

15.17

Held after

0.00

Exercisable

—

11/7/2025

Stock Option (right to buy)

Direct

J · J

Converts to

Class A Common Stock

30K shares

+30K

Strike price

15.17

Held after

30K

Exercisable

—

11/7/2025

Stock Option (right to buy)

Direct

J · J

Converts to

Common Stock

37.50K shares

−37.50K

Strike price

30.78

Held after

0.00

Exercisable

—

11/7/2025

Stock Option (right to buy)

Direct

J · J

Converts to

Class A Common Stock

37.50K shares

+37.50K

Strike price

30.78

Held after

37.50K

Exercisable

—

11/7/2025

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (right to buy) Direct	Common Stock28.50K shares	11/7/2025	J · J	−28.50K	0.56	—	0.00
Stock Option (right to buy) Direct	Class A Common Stock28.50K shares	11/7/2025	J · J	+28.50K	0.56	—	28.50K
Stock Option (right to buy) Direct	Common Stock20K shares	11/7/2025	J · J	−20K	2.8	—	0.00
Stock Option (right to buy) Direct	Class A Common Stock20K shares	11/7/2025	J · J	+20K	2.8	—	20K
Stock Option (right to buy) Direct	Common Stock15K shares	11/7/2025	J · J	−15K	10.92	—	0.00
Stock Option (right to buy) Direct	Class A Common Stock15K shares	11/7/2025	J · J	+15K	10.92	—	15K
Stock Option (right to buy) Direct	Common Stock30K shares	11/7/2025	J · J	−30K	15.17	—	0.00
Stock Option (right to buy) Direct	Class A Common Stock30K shares	11/7/2025	J · J	+30K	15.17	—	30K
Stock Option (right to buy) Direct	Common Stock37.50K shares	11/7/2025	J · J	−37.50K	30.78	—	0.00
Stock Option (right to buy) Direct	Class A Common Stock37.50K shares	11/7/2025	J · J	+37.50K	30.78	—	37.50K