Atay Oguzhan Insider Trades & Stock Holdings

Chairman and CEO · BillionToOne, Inc. · Latest filing Oct 12, 2026

Atay Oguzhan, Chairman and CEO at BillionToOne, Inc. has 2 Form 4 trades on file since Sep 28, 2026. Open-market activity: 0 purchases ($0) and 2 sales ($3.15M), net -$3.15M. Latest filing: disposed of 19.33K shares of $BLLN on Oct 12, 2026 at $94.31.

Trades on file

2

Open-market bought

$0

Open-market sold

$3.15M

Net open-market

-$3.15M

Latest filing

Oct 12, 2026

All insider trades by Atay Oguzhan

Date	Ticker	Type	Shares	Price	Value	Owned after	ΔOwn	1W	1M	6M	Role	Filing	Story
Oct 12, 2026	$BLLN	Sell (Open-market sale) 10b5-1	19.33K	$94.31	$1.82M						Chairman and CEO		Read
Sep 28, 2026	$BLLN	Sell (Open-market sale) 10b5-1	11K	$120.64	$1.33M			-10.4%			Chairman and CEO		—

"Buy" means shares acquired on the Form 4 (including grants and option exercises); "Sell" means shares disposed. 1W / 1M / 6M = how the stock moved after the trade.

Stocks Atay Oguzhan traded

• $BLLN

Frequently asked questions

Has Atay Oguzhan been buying or selling stock?

Atay Oguzhan has 0 open-market purchases and 2 open-market sales on file, net -$3.15M. Grants, option exercises and tax withholding are listed separately because they are not open-market trades.

What was Atay Oguzhan's latest insider trade?

disposed of 19.33K shares of $BLLN on Oct 12, 2026 at $94.31.

Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.