BillionToOne CEO sells 45,000 shares, exercises options
BillionToOne, Inc. Chairman and CEO Atay Oguzhan reported multiple equity transactions in Class A Common Stock.
Rhea-AI Filing Summary
BillionToOne, Inc. Chairman and CEO Atay Oguzhan reported multiple equity transactions in Class A Common Stock. On August 3, 2026 he exercised stock options to acquire 32,500 shares at $2.80 per share from fully vested awards expiring 2031-06-07, and reported sales totaling 45,000 shares in numerous trades at weighted average prices between $132.500 and $139.500 per share, including shares held by his spouse. All transactions were effected under a Rule 10b5-1 trading plan adopted March 6, 2026.
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Insights
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Insider Trade Summary 10b5-1
Exercise and sale activity reported; no spread calculated
Exercise and Sale
29 txns
Insider
Atay Oguzhan
Role
Chairman and CEO
Sold
45,000 shs ($6.17M)
Approx. gross sale proceeds
$6.17M
Approx. exercise cost
$91K
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Stock Option (right to buy) F10 | 20,000 | $2.80 | $56K |
| Exercise | Stock Option (right to buy) F10 | 6,250 | $2.80 | $18K |
| Exercise | Stock Option (right to buy) F10 | 6,250 | $2.80 | $18K |
| Exercise | Class A Common Stock F1 | 20,000 | $2.80 | $56K |
| Exercise | Class A Common Stock F1 | 6,250 | $2.80 | $18K |
| Exercise | Class A Common Stock F1 | 6,250 | $2.80 | $18K |
| Sale | Class A Common Stock F1, F2 | 269 | $133.0074 | $36K |
| Sale | Class A Common Stock F1, F3 | 555 | $133.8083 | $74K |
| Sale | Class A Common Stock F1, F4 | 135 | $135.4241 | $18K |
| Sale | Class A Common Stock F1, F5 | 6,354 | $136.4246 | $867K |
| Sale | Class A Common Stock F1, F6 | 9,989 | $137.2456 | $1.37M |
| Sale | Class A Common Stock F1, F7 | 2,431 | $138.0892 | $336K |
| Sale | Class A Common Stock F1, F8 | 267 | $139.2052 | $37K |
| Sale | Class A Common Stock F1, F2 | 84 | $133.0045 | $11K |
| Sale | Class A Common Stock F1, F3 | 173 | $133.8076 | $23K |
| Sale | Class A Common Stock F1, F4 | 44 | $135.4122 | $6K |
| Sale | Class A Common Stock F1, F5 | 1,981 | $136.4246 | $270K |
| Sale | Class A Common Stock F1, F6 | 3,124 | $137.2453 | $429K |
| Sale | Class A Common Stock F1, F7 | 762 | $138.0897 | $105K |
| Sale | Class A Common Stock F1, F8 | 82 | $139.209 | $11K |
| Sale | Class A Common Stock F1, F2 | 84 | $133.0096 | $11K |
| Sale | Class A Common Stock F1, F3 | 173 | $133.8076 | $23K |
| Sale | Class A Common Stock F1, F4 | 43 | $135.4088 | $6K |
| Sale | Class A Common Stock F1, F5 | 1,983 | $136.424 | $271K |
| Sale | Class A Common Stock F1, F6 | 3,125 | $137.2457 | $429K |
| Sale | Class A Common Stock F1, F7 | 760 | $138.0901 | $105K |
| Sale | Class A Common Stock F1, F8 | 82 | $139.2042 | $11K |
| Sale | Class A Common Stock F1, F9 | 6,250 | $137.37 | $859K |
| Sale | Class A Common Stock F1, F9 | 6,250 | $137.37 | $859K |
Holdings After Transaction:
Stock Option (right to buy) — 542,500 contracts (Direct);
Class A Common Stock — 0 shares (Direct);
Class A Common Stock — 162,500 shares (Indirect, By spouse)
Footnotes (10)
- 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 $132.500 to $133.470 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 reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $133.510 to $133.9525 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.
- F4. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $134.6675 to $135.650 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.
- F5. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $135.745 to $136.740 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.
- F6. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $136.750 to $137.740 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.
- F7. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $137.750 to $138.740 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.
- F8. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $138.890 to $139.500 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.
- F9. Represents shares held by the Reporting Person's spouse.
- F10. The options are fully vested and exercisable.
Key Figures
Shares sold: 45,000 shares
Shares acquired via option exercise: 32,500 shares
Option exercise price: $2.80 per share
+3 more
6 metrics
Shares sold
45,000 shares
Total Class A Common Stock sales reported on 2026-08-03
Shares acquired via option exercise
32,500 shares
Class A Common Stock from stock option exercises on 2026-08-03
Option exercise price
$2.80 per share
Exercise price for stock options converting into Class A Common Stock
Sale price range
$132.500–$139.500 per share
Weighted average sale price ranges across multiple transactions
Rule 10b5-1 plan adoption date
March 6, 2026
Date the CEO adopted the trading plan governing these trades
Option expiration date
2031-06-07
Expiration date for the exercised stock options
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
"The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan"
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.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What insider transactions did BillionToOne (BLLN) report on August 3, 2026?
BillionToOne (BLLN) reported that CEO Atay Oguzhan exercised stock options for 32,500 shares at $2.80 and reported sales totaling 45,000 Class A shares. The sales occurred in multiple trades at weighted average prices between $132.500 and $139.500 per share.
How many BillionToOne (BLLN) options did Atay Oguzhan exercise and at what price?
Atay Oguzhan exercised stock options covering 32,500 shares of BillionToOne (BLLN) Class A Common Stock at an exercise price of $2.80 per share. The underlying options were fully vested, exercisable, and carried an expiration date of 2031-06-07 at the time of exercise.
Were the BillionToOne (BLLN) insider trades executed under a Rule 10b5-1 plan?
Yes. All reported BillionToOne (BLLN) transactions were effected under a Rule 10b5-1 trading plan adopted by Atay Oguzhan on March 6, 2026. The filing also checks the Rule 10b5-1 box, confirming the use of a pre-arranged trading plan for these trades.
AI-generated analysis. How Rhea-AI works. Not financial advice.
