LYNCH THOMAS P. (See Remarks) purchased 16.7% of their position (100.00 shares) of BILLIONTOONE, INC. on the open market

Open‑market purchase worth $6.0K — a significant purchase. The strongest form of insider conviction signal.

P · 1 purchase

LYNCH THOMAS P.

Filed: 11/12/2025ACC: 0001193125-25-278144

InsiderLYNCH THOMAS P.CIK 1659824

→

IssuerBILLIONTOONE, INC.CIK 2070849

Officer· See Remarks

Since Nov 2025

+100.00

Net shares

Net buyer

$6.0K

Total acquired

Open market trades

1B · 0S

Total transactions

145.10K acquired · 145K disposed

Non-Derivative Transactions3

Common Stock

Direct

J · J

−600.00

Price / share

—

Trade value

—

% of position

New position

11/7/2025

600.00→0.00

Class A Common Stock

Direct

J · J

+600.00

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→600.00

Class A Common Stock

Direct

P · Purchase

+100.00

Price / share

$60.00

Trade value

$6K

% of position

16.7%

11/7/2025

600.00→700.00

Total

Net shares

+100.00

Net value

$6K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	11/7/2025	J · J	−600.00	—	—	New position	600.00	0.00
Class A Common Stock Direct	11/7/2025	J · J	+600.00	—	—	New position	0.00	600.00
Class A Common Stock Direct	11/7/2025	P · Purchase	+100.00	$60.00	$6K	16.7%	600.00	700.00
Total			+100.00		$6K

Derivative Transactions8

Stock Option (right to buy)

Direct

J · J

Converts to

Common Stock

79.40K shares

−79.40K

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

79.40K shares

+79.40K

Strike price

8.65

Held after

79.40K

Exercisable

—

11/7/2025

Stock Option (right to buy)

Direct

J · J

Converts to

Common Stock

15K shares

−15K

Strike price

11.55

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

11.55

Held after

15K

Exercisable

—

11/7/2025

Stock Option (right to buy)

Direct

J · J

Converts to

Common Stock

10K shares

−10K

Strike price

17.12

Held after

0.00

Exercisable

—

11/7/2025

Stock Option (right to buy)

Direct

J · J

Converts to

Class A Common Stock

10K shares

+10K

Strike price

17.12

Held after

10K

Exercisable

—

11/7/2025

Stock Option (right to buy)

Direct

J · J

Converts to

Common Stock

40K shares

−40K

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

40K shares

+40K

Strike price

30.78

Held after

40K

Exercisable

—

11/7/2025

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (right to buy) Direct	Common Stock79.40K shares	11/7/2025	J · J	−79.40K	8.65	—	0.00
Stock Option (right to buy) Direct	Class A Common Stock79.40K shares	11/7/2025	J · J	+79.40K	8.65	—	79.40K
Stock Option (right to buy) Direct	Common Stock15K shares	11/7/2025	J · J	−15K	11.55	—	0.00
Stock Option (right to buy) Direct	Class A Common Stock15K shares	11/7/2025	J · J	+15K	11.55	—	15K
Stock Option (right to buy) Direct	Common Stock10K shares	11/7/2025	J · J	−10K	17.12	—	0.00
Stock Option (right to buy) Direct	Class A Common Stock10K shares	11/7/2025	J · J	+10K	17.12	—	10K
Stock Option (right to buy) Direct	Common Stock40K shares	11/7/2025	J · J	−40K	30.78	—	0.00
Stock Option (right to buy) Direct	Class A Common Stock40K shares	11/7/2025	J · J	+40K	30.78	—	40K