BREMNER THOMAS S purchased 6.4% of their position (41.67K shares) of BILLIONTOONE, INC. on the open market

Open‑market purchase worth $2.50M — a moderate purchase. The strongest form of insider conviction signal.

P · 6 purchases

BREMNER THOMAS S

Filed: 11/10/2025ACC: 0001193125-25-274945

InsiderBREMNER THOMAS SCIK 2087538

→

IssuerBILLIONTOONE, INC.CIK 2070849

Director

Since Nov 2025

+100K

Net shares

Net buyer

$2.50M

Total acquired

Open market trades

6B · 0S

Total transactions

3.95M acquired · 3.85M disposed

Non-Derivative Transactions30

Common Stock

Direct

A · Award

+8.33K

Price / share

—

Trade value

—

% of position

New position

11/6/2025

0.00→8.33K

Common Stock

Indirect

C · Conversion

+152.44K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→152.44K

Common Stock

Indirect

C · Conversion

+155.71K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→155.71K

Common Stock

Indirect

C · Conversion

+176.27K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→176.27K

Common Stock

Indirect

C · Conversion

+269.92K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→269.92K

Common Stock

Indirect

C · Conversion

+240.07K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→240.07K

Common Stock

Indirect

C · Conversion

+675.35K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→675.35K

Common Stock

Indirect

C · Conversion

+277.51K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→277.51K

Common Stock

Direct

J · J

−8.33K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

8.33K→0.00

Common Stock

Indirect

J · J

−152.44K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

152.44K→0.00

Common Stock

Indirect

J · J

−155.71K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

155.71K→0.00

Common Stock

Indirect

J · J

−176.27K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

176.27K→0.00

Common Stock

Indirect

J · J

−269.92K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

269.92K→0.00

Common Stock

Indirect

J · J

−240.07K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

240.07K→0.00

Common Stock

Indirect

J · J

−675.35K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

675.35K→0.00

Common Stock

Indirect

J · J

−277.51K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

277.51K→0.00

Class A Common Stock

Direct

J · J

+8.33K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→8.33K

Class A Common Stock

Indirect

J · J

+152.44K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→152.44K

Class A Common Stock

Indirect

J · J

+155.71K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→155.71K

Class A Common Stock

Indirect

J · J

+176.27K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→176.27K

Class A Common Stock

Indirect

J · J

+269.92K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→269.92K

Class A Common Stock

Indirect

J · J

+240.07K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→240.07K

Class A Common Stock

Indirect

J · J

+675.35K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→675.35K

Class A Common Stock

Indirect

J · J

+277.51K

Price / share

—

Trade value

—

% of position

New position

11/7/2025

0.00→277.51K

Class A Common Stock

Indirect

P · Purchase

+4.02K

Price / share

$60.00

Trade value

$240.96K

% of position

2.6%

11/7/2025

152.44K→156.46K

Class A Common Stock

Indirect

P · Purchase

+4.08K

Price / share

$60.00

Trade value

$245.04K

% of position

2.6%

11/7/2025

155.71K→159.79K

Class A Common Stock

Indirect

P · Purchase

+3.46K

Price / share

$60.00

Trade value

$207.72K

% of position

2.0%

11/7/2025

176.27K→179.73K

Class A Common Stock

Indirect

P · Purchase

+5.45K

Price / share

$60.00

Trade value

$326.76K

% of position

2.0%

11/7/2025

269.92K→275.36K

Class A Common Stock

Indirect

P · Purchase

+6.87K

Price / share

$60.00

Trade value

$412.02K

% of position

2.9%

11/7/2025

240.07K→246.94K

Class A Common Stock

Indirect

P · Purchase

+17.79K

Price / share

$60.00

Trade value

$1.07M

% of position

2.6%

11/7/2025

675.35K→693.14K

Total

Net shares

+2M

Net value

$2.50M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	11/6/2025	A · Award	+8.33K	—	—	New position	0.00	8.33K
Common Stock Indirect	11/7/2025	C · Conversion	+152.44K	—	—	New position	0.00	152.44K
Common Stock Indirect	11/7/2025	C · Conversion	+155.71K	—	—	New position	0.00	155.71K
Common Stock Indirect	11/7/2025	C · Conversion	+176.27K	—	—	New position	0.00	176.27K
Common Stock Indirect	11/7/2025	C · Conversion	+269.92K	—	—	New position	0.00	269.92K
Common Stock Indirect	11/7/2025	C · Conversion	+240.07K	—	—	New position	0.00	240.07K
Common Stock Indirect	11/7/2025	C · Conversion	+675.35K	—	—	New position	0.00	675.35K
Common Stock Indirect	11/7/2025	C · Conversion	+277.51K	—	—	New position	0.00	277.51K
Common Stock Direct	11/7/2025	J · J	−8.33K	—	—	New position	8.33K	0.00
Common Stock Indirect	11/7/2025	J · J	−152.44K	—	—	New position	152.44K	0.00
Common Stock Indirect	11/7/2025	J · J	−155.71K	—	—	New position	155.71K	0.00
Common Stock Indirect	11/7/2025	J · J	−176.27K	—	—	New position	176.27K	0.00
Common Stock Indirect	11/7/2025	J · J	−269.92K	—	—	New position	269.92K	0.00
Common Stock Indirect	11/7/2025	J · J	−240.07K	—	—	New position	240.07K	0.00
Common Stock Indirect	11/7/2025	J · J	−675.35K	—	—	New position	675.35K	0.00
Common Stock Indirect	11/7/2025	J · J	−277.51K	—	—	New position	277.51K	0.00
Class A Common Stock Direct	11/7/2025	J · J	+8.33K	—	—	New position	0.00	8.33K
Class A Common Stock Indirect	11/7/2025	J · J	+152.44K	—	—	New position	0.00	152.44K
Class A Common Stock Indirect	11/7/2025	J · J	+155.71K	—	—	New position	0.00	155.71K
Class A Common Stock Indirect	11/7/2025	J · J	+176.27K	—	—	New position	0.00	176.27K
Class A Common Stock Indirect	11/7/2025	J · J	+269.92K	—	—	New position	0.00	269.92K
Class A Common Stock Indirect	11/7/2025	J · J	+240.07K	—	—	New position	0.00	240.07K
Class A Common Stock Indirect	11/7/2025	J · J	+675.35K	—	—	New position	0.00	675.35K
Class A Common Stock Indirect	11/7/2025	J · J	+277.51K	—	—	New position	0.00	277.51K
Class A Common Stock Indirect	11/7/2025	P · Purchase	+4.02K	$60.00	$240.96K	2.6%	152.44K	156.46K
Class A Common Stock Indirect	11/7/2025	P · Purchase	+4.08K	$60.00	$245.04K	2.6%	155.71K	159.79K
Class A Common Stock Indirect	11/7/2025	P · Purchase	+3.46K	$60.00	$207.72K	2.0%	176.27K	179.73K
Class A Common Stock Indirect	11/7/2025	P · Purchase	+5.45K	$60.00	$326.76K	2.0%	269.92K	275.36K
Class A Common Stock Indirect	11/7/2025	P · Purchase	+6.87K	$60.00	$412.02K	2.9%	240.07K	246.94K
Class A Common Stock Indirect	11/7/2025	P · Purchase	+17.79K	$60.00	$1.07M	2.6%	675.35K	693.14K
Total			+2M		$2.50M

Derivative Transactions27

Series A-1 Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

1.35K shares

−1.35K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series C Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

114.12K shares

−114.12K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series C-1 Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

16.75K shares

−16.75K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series D Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

20.22K shares

−20.22K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series C Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

121.69K shares

−121.69K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series C-1 Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

17.86K shares

−17.86K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series D Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

16.16K shares

−16.16K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series A-1 Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

1.56K shares

−1.56K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series C Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

131.89K shares

−131.89K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series C-1 Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

19.36K shares

−19.36K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series D Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

23.47K shares

−23.47K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series A-1 Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

1.86K shares

−1.86K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series C Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

157.40K shares

−157.40K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series C-1 Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

23.10K shares

−23.10K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series D Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

87.55K shares

−87.55K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series A-1 Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

652.00 shares

−652.00

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series C Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

55.09K shares

−55.09K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series C-1 Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

8.08K shares

−8.08K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series D Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

176.25K shares

−176.25K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series A-1 Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

5.99K shares

−5.99K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series C Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

505.57K shares

−505.57K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series C-1 Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

74.19K shares

−74.19K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series D Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

89.60K shares

−89.60K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series A-1 Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

1.08K shares

−1.08K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series C Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

91K shares

−91K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series C-1 Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

13.36K shares

−13.36K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Series D Convertible Preferred Stock

Indirect

C · Conversion

Converts to

Common Stock

122.07K shares

−122.07K

Strike price

Held after

0.00

Exercisable

—

11/7/2025

Security	Converts To	Date	Type	Shares	Exercisable
Series A-1 Convertible Preferred Stock Indirect	Common Stock1.35K shares	11/7/2025	C · Conversion	−1.35K	—
Series C Convertible Preferred Stock Indirect	Common Stock114.12K shares	11/7/2025	C · Conversion	−114.12K	—
Series C-1 Convertible Preferred Stock Indirect	Common Stock16.75K shares	11/7/2025	C · Conversion	−16.75K	—
Series D Convertible Preferred Stock Indirect	Common Stock20.22K shares	11/7/2025	C · Conversion	−20.22K	—
Series C Convertible Preferred Stock Indirect	Common Stock121.69K shares	11/7/2025	C · Conversion	−121.69K	—
Series C-1 Convertible Preferred Stock Indirect	Common Stock17.86K shares	11/7/2025	C · Conversion	−17.86K	—
Series D Convertible Preferred Stock Indirect	Common Stock16.16K shares	11/7/2025	C · Conversion	−16.16K	—
Series A-1 Convertible Preferred Stock Indirect	Common Stock1.56K shares	11/7/2025	C · Conversion	−1.56K	—
Series C Convertible Preferred Stock Indirect	Common Stock131.89K shares	11/7/2025	C · Conversion	−131.89K	—
Series C-1 Convertible Preferred Stock Indirect	Common Stock19.36K shares	11/7/2025	C · Conversion	−19.36K	—
Series D Convertible Preferred Stock Indirect	Common Stock23.47K shares	11/7/2025	C · Conversion	−23.47K	—
Series A-1 Convertible Preferred Stock Indirect	Common Stock1.86K shares	11/7/2025	C · Conversion	−1.86K	—
Series C Convertible Preferred Stock Indirect	Common Stock157.40K shares	11/7/2025	C · Conversion	−157.40K	—
Series C-1 Convertible Preferred Stock Indirect	Common Stock23.10K shares	11/7/2025	C · Conversion	−23.10K	—
Series D Convertible Preferred Stock Indirect	Common Stock87.55K shares	11/7/2025	C · Conversion	−87.55K	—
Series A-1 Convertible Preferred Stock Indirect	Common Stock652.00 shares	11/7/2025	C · Conversion	−652.00	—
Series C Convertible Preferred Stock Indirect	Common Stock55.09K shares	11/7/2025	C · Conversion	−55.09K	—
Series C-1 Convertible Preferred Stock Indirect	Common Stock8.08K shares	11/7/2025	C · Conversion	−8.08K	—
Series D Convertible Preferred Stock Indirect	Common Stock176.25K shares	11/7/2025	C · Conversion	−176.25K	—
Series A-1 Convertible Preferred Stock Indirect	Common Stock5.99K shares	11/7/2025	C · Conversion	−5.99K	—
Series C Convertible Preferred Stock Indirect	Common Stock505.57K shares	11/7/2025	C · Conversion	−505.57K	—
Series C-1 Convertible Preferred Stock Indirect	Common Stock74.19K shares	11/7/2025	C · Conversion	−74.19K	—
Series D Convertible Preferred Stock Indirect	Common Stock89.60K shares	11/7/2025	C · Conversion	−89.60K	—
Series A-1 Convertible Preferred Stock Indirect	Common Stock1.08K shares	11/7/2025	C · Conversion	−1.08K	—
Series C Convertible Preferred Stock Indirect	Common Stock91K shares	11/7/2025	C · Conversion	−91K	—
Series C-1 Convertible Preferred Stock Indirect	Common Stock13.36K shares	11/7/2025	C · Conversion	−13.36K	—
Series D Convertible Preferred Stock Indirect	Common Stock122.07K shares	11/7/2025	C · Conversion	−122.07K	—