ATAY OGUZHAN

PrivateCIK: 2088549
Location

MENLO PARK, CA

ATAY OGUZHAN (See Remarks) sold 12.50K shares of BILLIONTOONE, INC. on the open market

Open‑market sale worth $1.58M. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 4 sales
InsiderATAY OGUZHANCIK 2088549
IssuerBILLIONTOONE, INC.CIK 2070849
DirectorOfficer· See Remarks
Since Nov 2025
-12.50K
Net shares
Net seller
$1.58M
Total sold
4
Open market trades
0B · 4S
6
Total transactions
12.50K acquired · 25K disposed
Non-Derivative Transactions5

Class A Common Stock

Direct
M · Option Exercise

Shares

+12.50K

Price / share

$2.80

Trade value

$35K

% of position

New position
7/9/2026
0.0012.50K

Class A Common Stock

Direct
S · Sale

Shares

7.49K

Price / share

$125.43

Trade value

$939.32K

% of position

59.9%
7/9/2026
12.50K5.01K

Class A Common Stock

Direct
S · Sale

Shares

2K

Price / share

$126.48

Trade value

$253.22K

% of position

40.0%
7/9/2026
5.01K3.01K

Class A Common Stock

Direct
S · Sale

Shares

2.66K

Price / share

$127.44

Trade value

$338.60K

% of position

88.3%
7/9/2026
3.01K352.00

Class A Common Stock

Direct
S · Sale

Shares

352.00

Price / share

$128.23

Trade value

$45.14K

% of position

New position
7/9/2026
352.000.00
Total

Net shares

+0.00

Net value

-$1.54M

Derivative Transactions1

Stock Option (right to buy)

Direct
M · Option Exercise
Converts to

Class A Common Stock

12.50K shares

Shares

12.50K

Strike price

2.80

Held after

575K

Exercisable

7/9/2026