ATAY OGUZHAN

PrivateCIK: 2088549
Location

MENLO PARK, CA

ATAY OGUZHAN (See Remarks) sold 18.1% of their position (38.75K shares) of BILLIONTOONE, INC. on the open market

Open‑market sale worth $4.73M — a significant reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 28 sales
InsiderATAY OGUZHANCIK 2088549
IssuerBILLIONTOONE, INC.CIK 2070849
DirectorOfficer· See Remarks
Since Nov 2025
-38.75K
Net shares
Net seller
$4.73M
Total sold
28
Open market trades
0B · 28S
32
Total transactions
26.25K acquired · 65K disposed
Non-Derivative Transactions30

Class A Common Stock

Direct
M · Option Exercise

Shares

+20K

Price / share

$2.80

Trade value

$56K

% of position

New position
7/6/2026
0.0020K

Class A Common Stock

Direct
M · Option Exercise

Shares

+6.25K

Price / share

$2.80

Trade value

$17.50K

% of position

31.3%
7/6/2026
20K26.25K

Class A Common Stock

Direct
S · Sale

Shares

1.32K

Price / share

$118.49

Trade value

$156.40K

% of position

5.0%
7/6/2026
26.25K24.93K

Class A Common Stock

Direct
S · Sale

Shares

3.64K

Price / share

$119.36

Trade value

$434.37K

% of position

14.6%
7/6/2026
24.93K21.29K

Class A Common Stock

Direct
S · Sale

Shares

1.83K

Price / share

$120.66

Trade value

$220.57K

% of position

8.6%
7/6/2026
21.29K19.46K

Class A Common Stock

Direct
S · Sale

Shares

1.11K

Price / share

$121.84

Trade value

$135.85K

% of position

5.7%
7/6/2026
19.46K18.35K

Class A Common Stock

Direct
S · Sale

Shares

6.22K

Price / share

$123.07

Trade value

$765.87K

% of position

33.9%
7/6/2026
18.35K12.13K

Class A Common Stock

Direct
S · Sale

Shares

5.25K

Price / share

$123.81

Trade value

$650.37K

% of position

43.3%
7/6/2026
12.13K6.87K

Class A Common Stock

Direct
S · Sale

Shares

622.00

Price / share

$124.61

Trade value

$77.51K

% of position

9.1%
7/6/2026
6.87K6.25K

Class A Common Stock

Direct
S · Sale

Shares

412.00

Price / share

$118.49

Trade value

$48.82K

% of position

6.6%
7/6/2026
6.25K5.84K

Class A Common Stock

Direct
S · Sale

Shares

1.14K

Price / share

$119.36

Trade value

$135.84K

% of position

19.5%
7/6/2026
5.84K4.70K

Class A Common Stock

Direct
S · Sale

Shares

570.00

Price / share

$120.66

Trade value

$68.78K

% of position

12.1%
7/6/2026
4.70K4.13K

Class A Common Stock

Direct
S · Sale

Shares

349.00

Price / share

$121.84

Trade value

$42.52K

% of position

8.5%
7/6/2026
4.13K3.78K

Class A Common Stock

Direct
S · Sale

Shares

1.95K

Price / share

$123.07

Trade value

$239.37K

% of position

51.4%
7/6/2026
3.78K1.84K

Class A Common Stock

Direct
S · Sale

Shares

1.64K

Price / share

$123.81

Trade value

$203.29K

% of position

89.4%
7/6/2026
1.84K194.00

Class A Common Stock

Direct
S · Sale

Shares

194.00

Price / share

$124.61

Trade value

$24.18K

% of position

New position
7/6/2026
194.000.00

Class A Common Stock

Indirect
S · Sale

Shares

1.03K

Price / share

$118.81

Trade value

$122.85K

% of position

0.6%
7/6/2026
187.50K186.47K

Class A Common Stock

Indirect
S · Sale

Shares

591.00

Price / share

$119.67

Trade value

$70.73K

% of position

0.3%
7/6/2026
186.47K185.88K

Class A Common Stock

Indirect
S · Sale

Shares

444.00

Price / share

$120.69

Trade value

$53.59K

% of position

0.2%
7/6/2026
185.88K185.43K

Class A Common Stock

Indirect
S · Sale

Shares

587.00

Price / share

$122.08

Trade value

$71.66K

% of position

0.3%
7/6/2026
185.43K184.84K

Class A Common Stock

Indirect
S · Sale

Shares

2.32K

Price / share

$123.25

Trade value

$286.30K

% of position

1.3%
7/6/2026
184.84K182.52K

Class A Common Stock

Indirect
S · Sale

Shares

1.22K

Price / share

$124.04

Trade value

$151.46K

% of position

0.7%
7/6/2026
182.52K181.30K

Class A Common Stock

Indirect
S · Sale

Shares

50.00

Price / share

$124.74

Trade value

$6.24K

% of position

0.0%
7/6/2026
181.30K181.25K

Class A Common Stock

Indirect
S · Sale

Shares

1.03K

Price / share

$118.81

Trade value

$122.85K

% of position

0.6%
7/6/2026
181.25K180.22K

Class A Common Stock

Indirect
S · Sale

Shares

591.00

Price / share

$119.67

Trade value

$70.73K

% of position

0.3%
7/6/2026
180.22K179.63K

Class A Common Stock

Indirect
S · Sale

Shares

444.00

Price / share

$120.69

Trade value

$53.59K

% of position

0.2%
7/6/2026
179.63K179.18K

Class A Common Stock

Indirect
S · Sale

Shares

586.00

Price / share

$122.08

Trade value

$71.54K

% of position

0.3%
7/6/2026
179.18K178.59K

Class A Common Stock

Indirect
S · Sale

Shares

2.32K

Price / share

$123.25

Trade value

$286.43K

% of position

1.3%
7/6/2026
178.59K176.27K

Class A Common Stock

Indirect
S · Sale

Shares

1.22K

Price / share

$124.04

Trade value

$151.46K

% of position

0.7%
7/6/2026
176.27K175.05K

Class A Common Stock

Indirect
S · Sale

Shares

50.00

Price / share

$124.74

Trade value

$6.24K

% of position

0.0%
7/6/2026
175.05K175K
Total

Net shares

12.50K

Net value

-$4.66M

Derivative Transactions2

Stock Option (right to buy)

Direct
M · Option Exercise
Converts to

Class A Common Stock

20K shares

Shares

20K

Strike price

2.80

Held after

593.75K

Exercisable

7/6/2026

Stock Option (right to buy)

Direct
M · Option Exercise
Converts to

Class A Common Stock

6.25K shares

Shares

6.25K

Strike price

2.80

Held after

587.50K

Exercisable

7/6/2026