BLLN: Atay Oguzhan sold $1.1M of stock
By AlphaYouPublished Form 4
Atay Oguzhan
Reporting filer
Atay Oguzhan reported selling 11,000 shares of BillionToOne, Inc. for about $1.1M ($99.14 a share on average). Form 4 filed Oct 16, 2026 lists 12 entries.
See the price move since this trade →
- Disclosed
- Oct 16, 2026
Reported details
12 entries| Security | Owner | Date | Code | Action | Quantity | Price | Following holdings | Reporting delay | Filed terms and references |
|---|---|---|---|---|---|---|---|---|---|
| Class A Common Stock | Atay Oguzhan | 2026-10-14 | M | Exercise or conversion | 3183 | 2.80 | 3,183 | 2 days | Filed terms
|
| Class A Common Stock | Atay Oguzhan | 2026-10-14 | S | Sale | 3083 | 98.3198 | 100 | 2 days | Filed terms
|
| Class A Common Stock | Atay Oguzhan | 2026-10-14 | S | Sale | 100 | 99 | 0 | 2 days | Filed terms
|
| Class A Common Stock | Atay Oguzhan | 2026-10-15 | M | Exercise or conversion | 5150 | 2.80 | 5,150 | 1 day | Filed terms
|
| Class A Common Stock | Atay Oguzhan | 2026-10-15 | S | Sale | 900 | 98.4328 | 4,250 | 1 day | Filed terms
|
| Class A Common Stock | Atay Oguzhan | 2026-10-15 | S | Sale | 1861 | 99.8438 | 2,389 | 1 day | Filed terms
|
| Class A Common Stock | Atay Oguzhan | 2026-10-15 | S | Sale | 1276 | 100.6029 | 1,113 | 1 day | Filed terms
|
| Class A Common Stock | Atay Oguzhan | 2026-10-15 | S | Sale | 980 | 101.7871 | 133 | 1 day | Filed terms
|
| Class A Common Stock | Atay Oguzhan | 2026-10-15 | S | Sale | 133 | 102.7766 | 0 | 1 day | Filed terms
|
| Class A Common Stock | Atay Oguzhan | 2026-10-14 | S | Sale | 2667 | 98 | 149,168 | 2 days | Filed terms
|
| Stock Option (right to buy) (derivative) | Atay Oguzhan | 2026-10-14 | M | Exercise or conversion | 3183 | 2.80 | 473,779 | 2 days | Filed terms
|
| Stock Option (right to buy) (derivative) | Atay Oguzhan | 2026-10-15 | M | Exercise or conversion | 5150 | 2.80 | 468,629 | 1 day | Filed terms
|
Class A Common Stock
- Owner
- Atay Oguzhan
- Date
- 2026-10-14
- Code
- M
- Action
- Exercise or conversion
- Quantity
- 3183
- Price
- 2.80
- Following holdings
- 3,183
- Reporting delay
- 2 days
- Filed terms and references
Filed terms
- security Title: Class A Common Stock
- transaction Date: 2026-10-14
- transaction Form Type: 4
- transaction Code: M
- equity Swap Involved: 0
- id: F1
- transaction Shares: 3183
- transaction Price Per Share: 2.80
- transaction Acquired Disposed Code: A
- shares Owned Following Transaction: 3183
- direct Or Indirect Ownership: D
Class A Common Stock
- Owner
- Atay Oguzhan
- Date
- 2026-10-14
- Code
- S
- Action
- Sale
- Quantity
- 3083
- Price
- 98.3198
- Following holdings
- 100
- Reporting delay
- 2 days
- Filed terms and references
Filed terms
- security Title: Class A Common Stock
- transaction Date: 2026-10-14
- transaction Form Type: 4
- transaction Code: S
- equity Swap Involved: 0
- id: F1
- transaction Shares: 3083
- transaction Price Per Share: 98.3198
- id: F2
- transaction Acquired Disposed Code: D
- shares Owned Following Transaction: 100
- direct Or Indirect Ownership: D
Class A Common Stock
- Owner
- Atay Oguzhan
- Date
- 2026-10-14
- Code
- S
- Action
- Sale
- Quantity
- 100
- Price
- 99
- Following holdings
- 0
- Reporting delay
- 2 days
- Filed terms and references
Filed terms
- security Title: Class A Common Stock
- transaction Date: 2026-10-14
- transaction Form Type: 4
- transaction Code: S
- equity Swap Involved: 0
- id: F1
- transaction Shares: 100
- transaction Price Per Share: 99
- transaction Acquired Disposed Code: D
- shares Owned Following Transaction: 0
- direct Or Indirect Ownership: D
Class A Common Stock
- Owner
- Atay Oguzhan
- Date
- 2026-10-15
- Code
- M
- Action
- Exercise or conversion
- Quantity
- 5150
- Price
- 2.80
- Following holdings
- 5,150
- Reporting delay
- 1 day
- Filed terms and references
Filed terms
- security Title: Class A Common Stock
- transaction Date: 2026-10-15
- transaction Form Type: 4
- transaction Code: M
- equity Swap Involved: 0
- id: F1
- transaction Shares: 5150
- transaction Price Per Share: 2.80
- transaction Acquired Disposed Code: A
- shares Owned Following Transaction: 5150
- direct Or Indirect Ownership: D
Class A Common Stock
- Owner
- Atay Oguzhan
- Date
- 2026-10-15
- Code
- S
- Action
- Sale
- Quantity
- 900
- Price
- 98.4328
- Following holdings
- 4,250
- Reporting delay
- 1 day
- Filed terms and references
Filed terms
- security Title: Class A Common Stock
- transaction Date: 2026-10-15
- transaction Form Type: 4
- transaction Code: S
- equity Swap Involved: 0
- id: F1
- transaction Shares: 900
- transaction Price Per Share: 98.4328
- id: F3
- transaction Acquired Disposed Code: D
- shares Owned Following Transaction: 4250
- direct Or Indirect Ownership: D
Class A Common Stock
- Owner
- Atay Oguzhan
- Date
- 2026-10-15
- Code
- S
- Action
- Sale
- Quantity
- 1861
- Price
- 99.8438
- Following holdings
- 2,389
- Reporting delay
- 1 day
- Filed terms and references
Filed terms
- security Title: Class A Common Stock
- transaction Date: 2026-10-15
- transaction Form Type: 4
- transaction Code: S
- equity Swap Involved: 0
- id: F1
- transaction Shares: 1861
- transaction Price Per Share: 99.8438
- id: F4
- transaction Acquired Disposed Code: D
- shares Owned Following Transaction: 2389
- direct Or Indirect Ownership: D
Class A Common Stock
- Owner
- Atay Oguzhan
- Date
- 2026-10-15
- Code
- S
- Action
- Sale
- Quantity
- 1276
- Price
- 100.6029
- Following holdings
- 1,113
- Reporting delay
- 1 day
- Filed terms and references
Filed terms
- security Title: Class A Common Stock
- transaction Date: 2026-10-15
- transaction Form Type: 4
- transaction Code: S
- equity Swap Involved: 0
- id: F1
- transaction Shares: 1276
- transaction Price Per Share: 100.6029
- id: F5
- transaction Acquired Disposed Code: D
- shares Owned Following Transaction: 1113
- direct Or Indirect Ownership: D
Class A Common Stock
- Owner
- Atay Oguzhan
- Date
- 2026-10-15
- Code
- S
- Action
- Sale
- Quantity
- 980
- Price
- 101.7871
- Following holdings
- 133
- Reporting delay
- 1 day
- Filed terms and references
Filed terms
- security Title: Class A Common Stock
- transaction Date: 2026-10-15
- transaction Form Type: 4
- transaction Code: S
- equity Swap Involved: 0
- id: F1
- transaction Shares: 980
- transaction Price Per Share: 101.7871
- id: F6
- transaction Acquired Disposed Code: D
- shares Owned Following Transaction: 133
- direct Or Indirect Ownership: D
Class A Common Stock
- Owner
- Atay Oguzhan
- Date
- 2026-10-15
- Code
- S
- Action
- Sale
- Quantity
- 133
- Price
- 102.7766
- Following holdings
- 0
- Reporting delay
- 1 day
- Filed terms and references
Filed terms
- security Title: Class A Common Stock
- transaction Date: 2026-10-15
- transaction Form Type: 4
- transaction Code: S
- equity Swap Involved: 0
- id: F1
- transaction Shares: 133
- transaction Price Per Share: 102.7766
- id: F7
- transaction Acquired Disposed Code: D
- shares Owned Following Transaction: 0
- direct Or Indirect Ownership: D
Class A Common Stock
- Owner
- Atay Oguzhan
- Date
- 2026-10-14
- Code
- S
- Action
- Sale
- Quantity
- 2667
- Price
- 98
- Following holdings
- 149,168
- Reporting delay
- 2 days
- Filed terms and references
Filed terms
- security Title: Class A Common Stock
- transaction Date: 2026-10-14
- transaction Form Type: 4
- transaction Code: S
- equity Swap Involved: 0
- id: F8
- transaction Shares: 2667
- transaction Price Per Share: 98
- transaction Acquired Disposed Code: D
- shares Owned Following Transaction: 149168
- direct Or Indirect Ownership: I
- nature Of Ownership: By spouse
- id: F9
Stock Option (right to buy) (derivative)
- Owner
- Atay Oguzhan
- Date
- 2026-10-14
- Code
- M
- Action
- Exercise or conversion
- Quantity
- 3183
- Price
- 2.80
- Following holdings
- 473,779
- Reporting delay
- 2 days
- Filed terms and references
Filed terms
- security Title: Stock Option (right to buy)
- conversion Or Exercise Price: 2.80
- transaction Date: 2026-10-14
- transaction Form Type: 4
- transaction Code: M
- equity Swap Involved: 0
- transaction Shares: 3183
- transaction Price Per Share: 2.80
- transaction Acquired Disposed Code: D
- id: F10
- expiration Date: 2031-06-07
- underlying Security Title: Class A Common Stock
- underlying Security Shares: 3183
- shares Owned Following Transaction: 473779
- direct Or Indirect Ownership: D
Stock Option (right to buy) (derivative)
- Owner
- Atay Oguzhan
- Date
- 2026-10-15
- Code
- M
- Action
- Exercise or conversion
- Quantity
- 5150
- Price
- 2.80
- Following holdings
- 468,629
- Reporting delay
- 1 day
- Filed terms and references
Filed terms
- security Title: Stock Option (right to buy)
- conversion Or Exercise Price: 2.80
- transaction Date: 2026-10-15
- transaction Form Type: 4
- transaction Code: M
- equity Swap Involved: 0
- transaction Shares: 5150
- transaction Price Per Share: 2.80
- transaction Acquired Disposed Code: D
- id: F10
- expiration Date: 2031-06-07
- underlying Security Title: Class A Common Stock
- underlying Security Shares: 5150
- shares Owned Following Transaction: 468629
- direct Or Indirect Ownership: D
Purchases, sales, grants and option exercises are different transactions. The reported code identifies the action; it does not establish a motive.
Filing context
- Quantities and prices are shown in the units filed. No trade value is inferred from their product.
- Atay Oguzhan: Chairman and CEO, Director.
- The filing reports a Rule 10b5-1 trading plan.
- F1: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026.
- F2: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $98.000 to $98.990 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 $98.000 to $98.770 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 $99.270 to $100.250 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 $100.270 to $101.200 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 $101.370 to $102.140 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 $102.765 to $102.830 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 transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person's spouse on June 7, 2026.
- F9: Represents shares held by the Reporting Person's spouse.
- F10: The options are fully vested and exercisable.
Original sources
Prepared automatically from public filing data. Report a correction.