ATAY OGUZHAN

PrivateCIK: 2088549
Location

MENLO PARK, CA

ATAY OGUZHAN (See Remarks) sold 17.1% of their position (38.75K shares) of BILLIONTOONE, INC. on the open market

Open‑market sale worth $3.79M — a significant reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 10 sales
InsiderATAY OGUZHANCIK 2088549
IssuerBILLIONTOONE, INC.CIK 2070849
DirectorOfficer· See Remarks
Since Nov 2025
-48.75K
Net shares
Net seller
$3.79M
Total sold
10
Open market trades
0B · 10S
17
Total transactions
36.25K acquired · 85K disposed
Non-Derivative Transactions14

Class A Common Stock

Direct
M · Option Exercise

Shares

+20K

Price / share

$2.80

Trade value

$56K

% of position

New position
6/8/2026
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%
6/8/2026
20K26.25K

Class A Common Stock

Direct
S · Sale

Shares

79.00

Price / share

$100.87

Trade value

$7.97K

% of position

0.3%
6/8/2026
26.25K26.17K

Class A Common Stock

Direct
S · Sale

Shares

5.47K

Price / share

$94.76

Trade value

$517.97K

% of position

20.9%
6/8/2026
26.17K20.70K

Class A Common Stock

Direct
S · Sale

Shares

1.86K

Price / share

$95.59

Trade value

$177.41K

% of position

9.0%
6/8/2026
20.70K18.85K

Class A Common Stock

Direct
S · Sale

Shares

4.37K

Price / share

$96.89

Trade value

$423.61K

% of position

23.2%
6/8/2026
18.85K14.48K

Class A Common Stock

Direct
S · Sale

Shares

4.07K

Price / share

$98.12

Trade value

$398.96K

% of position

28.1%
6/8/2026
14.48K10.41K

Class A Common Stock

Direct
S · Sale

Shares

3.60K

Price / share

$99.06

Trade value

$357.12K

% of position

34.6%
6/8/2026
10.41K6.81K

Class A Common Stock

Direct
S · Sale

Shares

556.00

Price / share

$99.97

Trade value

$55.58K

% of position

8.2%
6/8/2026
6.81K6.25K

Class A Common Stock

Direct
S · Sale

Shares

6.25K

Price / share

$100.00

Trade value

$625K

% of position

New position
6/8/2026
6.25K0.00

Class A Common Stock

Direct
C · Conversion

Shares

+10K

Price / share

Trade value

% of position

New position
6/8/2026
0.0010K

Class A Common Stock

Indirect
S · Sale

Shares

6.25K

Price / share

$96.45

Trade value

$602.81K

% of position

3.1%
6/8/2026
200K193.75K

Class A Common Stock

Indirect
S · Sale

Shares

6.25K

Price / share

$100.00

Trade value

$625K

% of position

3.2%
6/8/2026
193.75K187.50K

Class A Common Stock

Direct
G · Gift

Shares

10K

Price / share

Trade value

% of position

New position
6/9/2026
10K0.00
Total

Net shares

12.50K

Net value

-$3.72M

Derivative Transactions3

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

620K

Exercisable

6/8/2026

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

613.75K

Exercisable

6/8/2026

Class B Common Stock

Direct
C · Conversion
Converts to

Class A Common Stock

10K shares

Shares

10K

Strike price

Held after

2.22M

Exercisable

6/8/2026
ATAY OGUZHAN — Insider Transaction (Form 4) Filed Jun 11, 2026 | Finecho