BillionToOne (BLLN) CEO sells 15,539 shares after option exercise
Rhea-AI Filing Summary
BillionToOne, Inc. Chairman and CEO Atay Oguzhan exercised stock options to acquire 15,539 shares of Class A Common Stock at $2.80 per share, then sold 15,539 shares at a weighted average of $150.0323 per share. The options were fully vested and exercisable, leaving 526,961 stock options outstanding. All reported transactions were effected under a Rule 10b5-1 trading plan adopted on March 6, 2026.
Positive
- None.
Negative
- None.
Insider Trade Summary 10b5-1
Exercise and Sale: 15,539 shares ($2.29M approx. pre-tax spread)
Exercise and Sale
3 txns
Insider
Atay Oguzhan
Role
Chairman and CEO
Sold
15,539 shs ($2.33M)
Approx. gross sale proceeds
$2.33M
Approx. exercise cost
$44K
Approx. pre-tax spread
$2.29M
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Stock Option (right to buy) F3 | 15,539 | $2.80 | $44K |
| Exercise | Class A Common Stock | 15,539 | $2.80 | $44K |
| Sale | Class A Common Stock F1, F2 | 15,539 | $150.0323 | $2.33M |
Holdings After Transaction:
Stock Option (right to buy) — 526,961 shares (Direct);
Class A Common Stock — 0 shares (Direct)
Footnotes (3)
- F1. The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026.
- F2. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $150.000 to $150.260 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
- F3. The options are fully vested and exercisable.
Key Figures
Options exercised: 15,539 shares
Exercise price: $2.80 per share
Shares sold: 15,539 shares
+2 more
5 metrics
Options exercised
15,539 shares
Stock options converted into Class A Common Stock on 2026-08-05
Exercise price
$2.80 per share
Exercise or conversion price of stock options
Shares sold
15,539 shares
Class A Common Stock sale on 2026-08-05
Weighted average sale price
$150.0323 per share
Weighted average for sales, range $150.000–$150.260 per share
Options remaining
526,961 options
Stock options reported as beneficially owned after the exercise
Key Terms
Rule 10b5-1 trading plan, weighted average price, Stock Option (right to buy), Class A Common Stock
4 terms
Rule 10b5-1 trading plan regulatory
"transactions were effected pursuant to a Rule 10b5-1 trading plan adopted"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
weighted average price financial
"The reported price in Column 4 is a weighted average price"
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
Stock Option (right to buy) financial
"security_title: Stock Option (right to buy)"
Class A Common Stock financial
"underlying_security_title: Class A Common Stock"
Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.
AI-generated analysis. How Rhea-AI works. Not financial advice.
FAQ
What insider transactions did BillionToOne (BLLN) CEO Atay Oguzhan report?
Atay Oguzhan reported exercising stock options for 15,539 shares of Class A Common Stock at $2.80 per share and then selling 15,539 shares at a weighted average of $150.0323 per share, all on August 5, 2026, under a Rule 10b5-1 plan.
Were the BillionToOne (BLLN) insider transactions made under a Rule 10b5-1 trading plan?
Yes. The filing states that all transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. The document-level Rule 10b5-1 checkbox is also marked, confirming plan-based trading for these transactions.
What options does the BillionToOne (BLLN) CEO hold after these transactions?
After exercising some options, the CEO is reported as beneficially owning 526,961 stock options. These are listed as Stock Option (right to buy) positions, separate from any common stock holdings, and represent options remaining after the 15,539-share exercise on August 5, 2026.
What was the exercise price for the BillionToOne (BLLN) stock options?
The exercised stock options had a conversion or exercise price of $2.80 per share. They were described as fully vested and exercisable, and the exercise converted the options into 15,539 shares of Class A Common Stock before those shares were sold the same day.