SAKAKIBARA SHAN RIKU (Chief Product Officer) reported 2 transactions at BILLIONTOONE, INC.

Review the transaction codes below to understand the nature of each event.

SAKAKIBARA SHAN RIKU

Filed: 11/12/2025ACC: 0001193125-25-278137

InsiderSAKAKIBARA SHAN RIKUCIK 2088547

→

IssuerBILLIONTOONE, INC.CIK 2070849

Officer· Chief Product Officer

Since Nov 2025

0.00

Net shares

Net seller

$0.00

Total acquired

Open market trades

0B · 0S

Total transactions

375K acquired · 375K disposed

Non-Derivative Transactions2

Common Stock

Direct

J · J

−220K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

220K→0.00

Class A Common Stock

Direct

J · J

+220K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→220K

Total

Net shares

+0.00

Net value

$0.00

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	11/7/2025	J · J	−220K	—	—	New position	220K	0.00
Class A Common Stock Direct	11/7/2025	J · J	+220K	—	—	New position	0.00	220K
Total			+0.00		$0.00

Derivative Transactions6

Stock Option (right to buy)

Direct

J · J

Converts to

Common Stock

50K shares

−50K

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

50K shares

+50K

Strike price

2.8

Held after

50K

Exercisable

—

11/7/2025

Stock Option (right to buy)

Direct

J · J

Converts to

Common Stock

40K shares

−40K

Strike price

8.65

Held after

0.00

Exercisable

—

11/7/2025

Stock Option (right to buy)

Direct

J · J

Converts to

Class A Common Stock

40K shares

+40K

Strike price

8.65

Held after

40K

Exercisable

—

11/7/2025

Stock Option (right to buy)

Direct

J · J

Converts to

Common Stock

65K shares

−65K

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

65K shares

+65K

Strike price

30.78

Held after

65K

Exercisable

—

11/7/2025

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (right to buy) Direct	Common Stock50K shares	11/7/2025	J · J	−50K	2.8	—	0.00
Stock Option (right to buy) Direct	Class A Common Stock50K shares	11/7/2025	J · J	+50K	2.8	—	50K
Stock Option (right to buy) Direct	Common Stock40K shares	11/7/2025	J · J	−40K	8.65	—	0.00
Stock Option (right to buy) Direct	Class A Common Stock40K shares	11/7/2025	J · J	+40K	8.65	—	40K
Stock Option (right to buy) Direct	Common Stock65K shares	11/7/2025	J · J	−65K	30.78	—	0.00
Stock Option (right to buy) Direct	Class A Common Stock65K shares	11/7/2025	J · J	+65K	30.78	—	65K