Atay Oguzhan
Chairman and CEO
Atay Oguzhan has filed 11 SEC Form 4 filings (119 transaction rows) across 1 company, with disclosures dating back to 2025. 11 of those filings fall inside the rolling window. Most recent filing: Oct 16, 2026.
On the most recent filing, Atay Oguzhan is listed as Chairman and CEO at BillionToOne, Inc. Inside the rolling window, Atay Oguzhan reported no open-market purchases and 10 open-market sales totaling $23.8M in BLLN. The largest disclosed transaction in the window is a sale of 38,577 BLLN shares on Aug 3, 2026, worth $5.3M.
Companies traded
Other insiders at BLLN
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$23.8M
reported sales (SEC code S)
Companies
1
in the rolling window
| Source | |||||||
|---|---|---|---|---|---|---|---|
| BLLN | Chairman and CEO | Sale | 5,850 | $574K | Oct 16 | SEC ↗ | |
| BLLN | Chairman and CEO | Sale | 5,150 | $516K | Oct 16 | SEC ↗ | |
| BLLN | Chairman and CEO | Sale | 19,334 | $1.8M | Oct 14 | SEC ↗ | |
| BLLN | Chairman and CEO | Sale | 10,999 | $1.3M | Oct 1 | SEC ↗ | |
| BLLN | Chairman and CEO | Sale | 27,665 | $2.8M | Sep 16 | SEC ↗ | |
| BLLN | Chairman and CEO | Sale | 15,539 | $2.3M | Aug 7 | SEC ↗ | |
| BLLN | Chairman and CEO | Sale | 38,577 | $5.3M | Aug 6 | SEC ↗ | |
| BLLN | Chairman and CEO | Sale | 12,500 | $1.6M | Jul 13 | SEC ↗ | |
| BLLN | Chairman and CEO | Sale | 36,444 | $4.4M | Jul 8 | SEC ↗ | |
| BLLN | See Remarks | Sale | 32,500 | $3.2M | Jun 11 | SEC ↗ |
Frequently asked questions
How many SEC Form 4 filings has Atay Oguzhan made?
Atay Oguzhan has filed 11 SEC Form 4 filings (119 transaction rows) across 1 company since 2025.
Which companies does Atay Oguzhan trade?
Atay Oguzhan has filed SEC Form 4 disclosures for 1 company, including BLLN.
When was Atay Oguzhan's most recent SEC Form 4 filing?
Atay Oguzhan's most recent SEC Form 4 filing on Tracefour is dated Oct 16, 2026.
What is Atay Oguzhan's job title?
On the most recent SEC Form 4 filings tracked by Tracefour, Atay Oguzhan is listed as Chairman and CEO.
What is Atay Oguzhan's total buy and sell value in the current window?
Inside the rolling retention window, Atay Oguzhan bought $0 and sold $23.8M based on SEC Form 4 filings.
What was Atay Oguzhan's largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 38,577 BLLN shares on 2026-08-03, worth $5.3M, per SEC Form 4 filings.