BillionToOne insider logs option exercises, share sales
BillionToOne, Inc. director and officer Atay Oguzhan reported multiple transactions in the company’s Class A and Class B common stock.
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Form Type
4
Rhea-AI Filing Summary
BillionToOne, Inc. director and officer Atay Oguzhan reported multiple transactions in the company’s Class A and Class B common stock. On June 8, 2026, he acquired a total of 36,250 shares of Class A common stock through option exercises and conversion of Class B shares at prices from $0.00 to $2.80 per share.
That same day, 38,750 shares of Class A common stock were sold in open-market transactions at weighted-average prices ranging from about $94.30 to $100.87, including sales of shares held by his spouse. On June 9, 2026, he made a bona fide gift of 10,000 Class A shares. The transactions were effected under a Rule 10b5-1 trading plan adopted on March 6, 2026.
Insider Trade Summary 10b5-1
Exercise and sale activity reported; no spread calculated
Exercise and Sale
17 txns
Insider
Atay Oguzhan
Role
See Remarks
Sold
38,750 shs ($3.79M)
Approx. gross sale proceeds
$3.79M
Approx. exercise cost
$74K
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Gift | Class A Common Stock | 10,000 | $0.00 | $0.00 |
| Exercise | Stock Option (right to buy) | 20,000 | $2.80 | $56K |
| Exercise | Stock Option (right to buy) | 6,250 | $2.80 | $18K |
| Conversion | Class B Common Stock | 10,000 | $0.00 | $0.00 |
| Exercise | Class A Common Stock | 20,000 | $2.80 | $56K |
| Exercise | Class A Common Stock | 6,250 | $2.80 | $18K |
| Sale | Class A Common Stock | 79 | $100.87 | $8K |
| Sale | Class A Common Stock | 5,466 | $94.7627 | $518K |
| Sale | Class A Common Stock | 1,856 | $95.5898 | $177K |
| Sale | Class A Common Stock | 4,372 | $96.8921 | $424K |
| Sale | Class A Common Stock | 4,066 | $98.1209 | $399K |
| Sale | Class A Common Stock | 3,605 | $99.063 | $357K |
| Sale | Class A Common Stock | 556 | $99.9688 | $56K |
| Sale | Class A Common Stock | 6,250 | $100.00 | $625K |
| Conversion | Class A Common Stock | 10,000 | $0.00 | $0.00 |
| Sale | Class A Common Stock | 6,250 | $96.45 | $603K |
| Sale | Class A Common Stock | 6,250 | $100.00 | $625K |
Holdings After Transaction:
Stock Option (right to buy) — 613,750 contracts (Direct);
Class B Common Stock — 2,217,542 contracts (Direct);
Class A Common Stock — 0 shares (Direct);
Class A Common Stock — 187,500 shares (Indirect, By spouse)
Footnotes (11)
- 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 $94.300 to $95.280 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 $95.320 to $96.225 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 $96.530 to $97.2113 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 $97.560 to $98.5428 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 $98.560 to $99.550 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 $99.640 to $100.540 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. These shares of Class B common stock were converted at a 1:1 ratio for shares of Class A common stock at the option of the holder.
- F9. Represents shares held by the Reporting Person's spouse.
- F10. The options are fully vested and exercisable.
- F11. Each share of Class B Common Stock is convertible into one share of Class A common stock at the option of the holder. Class B common stock will convert automatically on a one-for-one basis into shares of the Issuer's Class A common stock upon the earliest of (i) seven years from the date of filing of the amended and restated certificate of incorporation, in connection with the Offering and (ii) the date specified by a vote of the holders of Class B common stock representing a majority of the outstanding shares of Class B common stock.
Key Figures
Shares sold: 38,750 shares
Shares acquired via exercise/conversion: 36,250 shares
Option exercise price: $2.80 per share
+5 more
8 metrics
Shares sold
38,750 shares
Class A common stock open-market sales on June 8, 2026
Shares acquired via exercise/conversion
36,250 shares
Class A shares from option exercises and Class B conversion on June 8, 2026
Option exercise price
$2.80 per share
Stock options exercised into Class A common stock
Sale price range
$94.300–$100.870 per share
Weighted-average price ranges for grouped open-market sales
Gifted shares
10,000 shares
Bona fide gift of Class A common stock on June 9, 2026
10b5-1 plan adoption date
March 6, 2026
Plan governing reported transactions
Converted Class B shares
10,000 shares
Class B common stock converted 1:1 into Class A
Remaining stock options
620,000 options
Stock Option (right to buy) position after June 8, 2026 exercise
Key Terms
Rule 10b5-1 trading plan, bona fide gift, weighted average price, Class B common stock, +2 more
6 terms
Rule 10b5-1 trading plan regulatory
"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."
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.
bona fide gift financial
"transaction_code_description": "Bona fide gift""
A bona fide gift is a genuine, voluntary transfer of money, property, or benefits from one party to another made without expectation of repayment, services, or hidden conditions. Investors care because such gifts can affect company disclosures, related‑party transaction rules, tax treatment, and perceived conflicts of interest; think of it like someone giving you a present with no strings attached — but on a corporate scale, auditors and regulators need to verify it really is unconditional.
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.
Class B common stock financial
"These shares of Class B common stock were converted at a 1:1 ratio for shares of Class A common stock"
A class B common stock is one of multiple types of a company’s ordinary shares that carries specific rights—often different voting power or dividend priority—compared with other classes. For investors it matters because those differences affect how much influence you have over company decisions, the income you might receive, and how freely the shares trade; think of it like owning a car with different keys: some keys let you start the engine and open the trunk, others only unlock the door.
Stock Option (right to buy) financial
"security_title": "Stock Option (right to buy)""
open market or private transaction financial
"transaction_code_description": "Sale in open market or private transaction""
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What insider transactions did BLLN’s Atay Oguzhan report in this Form 4?
Atay Oguzhan reported option exercises, a Class B to Class A share conversion, open-market sales, and a stock gift. He acquired 36,250 Class A shares via exercises and conversion, sold 38,750 Class A shares, and gifted 10,000 Class A shares across the reported dates.
What options or conversions did the BLLN insider execute in this filing?
Oguzhan exercised stock options and converted Class B shares into Class A shares. In total, 36,250 Class A shares were acquired through these derivative exercises and conversions at prices between $0.00 and $2.80 per share, reflecting a shift from derivative holdings into direct common stock.
Was any of the BLLN stock owned indirectly, such as by a spouse?
Yes. Some Class A common stock was held indirectly through the reporting person’s spouse. The filing notes that certain open‑market sales on June 8, 2026 involved shares "held by the Reporting Person's spouse," clarifying that these transactions relate to indirect family holdings.
Did the BLLN insider make any stock gifts in the reported period?
The filing reports a bona fide gift of 10,000 shares of Class A common stock. This gift transaction, coded "G," occurred on June 9, 2026 at a reported price of $0.00 per share, reflecting a non‑market, no‑consideration transfer of shares.
AI-generated analysis. How Rhea-AI works. Not financial advice.
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