Comparable stake leader
Humming Bird Ventures Management NV
SEC ownership of BillionToOne, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002070849.
Disclosed value leader
Humming Bird Ventures Management NV
Comparable rows
4/50
Latest evidence
10 Sep 2026
- Public ticker
- BLLN on Nasdaq
- Parsed ownership sources
-
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Humming Bird Ventures Management NV
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
4 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Humming Bird Ventures Management NV
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
10 Sep 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0002070849
- Issuer location
- Menlo Park, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of BillionToOne, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Humming Bird Ventures Man...
Disclosed value leader
Humming Bird Ventures Man...
Comparable rows
4/50
Latest evidence
10 Sep 2026
13D/G
3/4/5
13F
Lead comparable stake: 20%
46 rows are not safely comparable across share classes.
13D/G row: Humming Bird Ventures Management NV
Showing 1-8 of 50 holder rows.
Quick read
Humming Bird Ventures Management NV leads the comparable SEC ownership view at 20%.
4 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Humming Bird Ventures Management NV's linked filing trail.
Comparable ownership
Top 4
Humming Bird Ventures Management NV
20%
NeoTribe Ventures I, L.P.
11%
Oguzhan Atay
7.3%
David Tsao
6.9%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Humming Bird Ventures Management NV |
13D/G
3/4/5
Hummingbird Ventures Management NV · 10%+ Owner
|
20%
Reported 13D/G
· 06 Nov 2025
|
$645,491,476
7,887,237 shares
|
$0 | 06 Nov 2025 |
| NeoTribe Ventures I, L.P. |
13D/G
3/4/5
Krishna Kittu Kolluri ("Kolluri") · 10%+ Owner
|
11%
Reported 13D/G
· 07 Nov 2025
|
$422,218,059
4,359,505 shares
|
$0 | 07 Nov 2025 |
| Oguzhan Atay |
13D/G
3/4/5
Chairman and CEO, Director
|
7.3%
Reported 13D/G
· 31 Dec 2025
|
$310,584,488
3,206,861 shares
|
$0 | 31 Dec 2025 |
| David Tsao |
13D/G
3/4/5
Chief Technology Officer, Director
|
6.9%
Reported 13D/G
· 31 Dec 2025
|
$294,014,034
3,035,767 shares
|
$0 | 31 Dec 2025 |
| NeoTribe Associates I, L.P. |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$6,896,356
87,362 shares
|
— | 09 Jun 2026 |
| Neotribe Ignite Fund I, L.P. |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$6,896,356
87,362 shares
|
— | 09 Jun 2026 |
| Neotribe Ignite Partners I, LLC |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$6,896,356
87,362 shares
|
— | 09 Jun 2026 |
| NeoTribe Partners I, LLC |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$6,896,356
87,362 shares
|
— | 09 Jun 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$51,339,996.
Buys
$0
Insiders: 0
Sells
$51,339,996
Insiders: 6
Net
-$51,339,996
Shares: -456,063
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 456,063
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 264,564 | $0 | $29,719,235 | -$29,719,235 |
| 3-6 | 0 | 191,499 | $0 | $21,620,761 | -$21,620,761 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 21 reporting-owner rows connected to BillionToOne, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
21
Largest Forms 3/4/5 holder
Shan Riku Sakakibara
Net 12M change
-$51,339,996
Latest report
14 Oct 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Shan Riku Sakakibara | Chief Product Officer | $23,576,070 | -$3,226,640 | -12% | Mixed | 10 Sep 2026 |
| Oguzhan Atay | Chairman and CEO, Director | $14,618,464 | -$25,867,800 | -64% | Filing P/S | 14 Oct 2026 |
| Krishna Kittu Kolluri | Director | $7,835,492 | Mixed | 26 Aug 2026 | ||
| Neotribe Ignite Partners I, LLC | 10%+ Owner | $6,896,356 | Mixed | 09 Jun 2026 | ||
| NeoTribe Ventures I, L.P. | 10%+ Owner | $6,896,356 | Mixed | 09 Jun 2026 | ||
| NeoTribe Associates I, L.P. | 10%+ Owner | $6,896,356 | Mixed | 09 Jun 2026 | ||
| Neotribe Ignite Fund I, L.P. | 10%+ Owner | $6,896,356 | Mixed | 09 Jun 2026 | ||
| Neotribe SPV I BTO, LLC | 10%+ Owner | $6,896,356 | Mixed | 09 Jun 2026 | ||
| NeoTribe Partners I, LLC | 10%+ Owner | $6,896,356 | Mixed | 09 Jun 2026 | ||
| Neotribe Partners SPV I BTO, LLC | 10%+ Owner | $6,896,356 | Mixed | 09 Jun 2026 | ||
| Firat Ileri | Director, 10%+ Owner | $3,183,729 | Mixed | 10 Jun 2026 | ||
| Bosch John Roderick Ten | SVP of Laboratory Operations | $2,038,332 | -$2,020,888 | -50% | Filing P/S | 05 Oct 2026 |
| Thomas P. Lynch | General Counsel, Chief Compliance Officer and Secretary | $1,138,908 | -$5,873,846 | -84% | Median | 13 Oct 2026 |
| Akshay Rai | Director | $1,107,212 | Mixed | 10 Jun 2026 | ||
| Thomas S. Bremner | Director | $895,969 | Mixed | 10 Jun 2026 | ||
| Nancy JoAnn Johnson | Senior Vice President of Sales and Commercial Operations | $895,473 | -$3,324,224 | -79% | Filing P/S | 16 Jul 2026 |
| Anthony Pagano | Director | $624,652 | Mixed | 10 Jun 2026 | ||
| David Tsao | Chief Technology Officer, Director | $110,090 | -$11,026,598 | -99% | Filing P/S | 05 Oct 2026 |
| Humming Bird Ventures Management NV | 10%+ Owner | $0 | Mixed | 07 Nov 2025 | ||
| John Lister | Chief Administrative Officer | Mixed | 07 Nov 2025 |
Recent insider transactions for BillionToOne, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Oguzhan Atay | BLLN | Class A Common Stock | Sale | -100% | $516,189 | $100.23 | -5,150 | 0 | 15 Oct 2026 | Direct |
| Oguzhan Atay | BLLN | Class A Common Stock | Options Exercise | 5,150 | 5,150 | 15 Oct 2026 | Direct | |||
| Oguzhan Atay | BLLN | Stock Option (right to buy) | Options Exercise | -1.09% | -5,150 | 468,629 | 15 Oct 2026 | Direct | ||
| Oguzhan Atay | BLLN | Class A Common Stock | Sale | -1.76% | $261,366 | $98.00 | -2,667 | 149,168 | 14 Oct 2026 | By spouse |
| Oguzhan Atay | BLLN | Class A Common Stock | Sale | -100% | $313,020 | $98.34 | -3,183 | 0 | 14 Oct 2026 | Direct |
| Oguzhan Atay | BLLN | Class A Common Stock | Options Exercise | 3,183 | 3,183 | 14 Oct 2026 | Direct | |||
| Oguzhan Atay | BLLN | Stock Option (right to buy) | Options Exercise | -0.67% | -3,183 | 473,779 | 14 Oct 2026 | Direct | ||
| Thomas P. Lynch | BLLN | Class A Common Stock | Options Exercise | 23% | 2,000 | 10,700 | 13 Oct 2026 | Direct | ||
| Thomas P. Lynch | BLLN | Stock Option (right to buy) | Options Exercise | -4.88% | -2,000 | 38,974 | 13 Oct 2026 | Direct | ||
| Oguzhan Atay | BLLN | Class A Common Stock | Sale | -1.73% | $260,326 | $97.61 | -2,667 | 151,835 | 12 Oct 2026 | By spouse |
| Oguzhan Atay | BLLN | Class A Common Stock | Sale | -100% | $1,563,124 | $93.79 | -16,667 | 0 | 12 Oct 2026 | Direct |
| Oguzhan Atay | BLLN | Class A Common Stock | Options Exercise | 16,667 | 16,667 | 12 Oct 2026 | Direct | |||
| Oguzhan Atay | BLLN | Stock Option (right to buy) | Options Exercise | -3.38% | -16,667 | 476,962 | 12 Oct 2026 | Direct | ||
| Thomas P. Lynch | BLLN | Class A Common Stock | Options Exercise | 1142.9% | 8,000 | 8,700 | 08 Oct 2026 | Direct | ||
| Thomas P. Lynch | BLLN | Stock Option (right to buy) | Options Exercise | -16.3% | -8,000 | 40,974 | 08 Oct 2026 | Direct | ||
| Bosch John Roderick Ten | BLLN | Class A Common Stock | Sale | -12.8% | $297,995 | $105.15 | -2,834 | 19,385 | 05 Oct 2026 | Direct |
| David Tsao | BLLN | Class A Common Stock | Sale | -95.2% | $2,162,950 | $108.15 | -20,000 | 1,000 | 05 Oct 2026 | Direct |
| David Tsao | BLLN | Class A Common Stock | Options Exercise | 2000% | 20,000 | 21,000 | 05 Oct 2026 | Direct | ||
| David Tsao | BLLN | Stock Option (right to buy) | Options Exercise | -3.59% | -20,000 | 536,667 | 05 Oct 2026 | Direct | ||
| Oguzhan Atay | BLLN | Class A Common Stock | Sale | -1.7% | $321,626 | $120.64 | -2,666 | 154,502 | 28 Sep 2026 | By spouse |
| Oguzhan Atay | BLLN | Class A Common Stock | Sale | -100% | $1,005,293 | $120.64 | -8,333 | 0 | 28 Sep 2026 | Direct |
| Oguzhan Atay | BLLN | Class A Common Stock | Options Exercise | 8,333 | 8,333 | 28 Sep 2026 | Direct | |||
| Oguzhan Atay | BLLN | Stock Option (right to buy) | Options Exercise | -1.66% | -8,333 | 493,629 | 28 Sep 2026 | Direct | ||
| David Tsao | BLLN | Class A Common Stock | Sale | -76.9% | $416,625 | $125.00 | -3,333 | 1,000 | 24 Sep 2026 | Direct |
| David Tsao | BLLN | Class A Common Stock | Options Exercise | 333.3% | 3,333 | 4,333 | 24 Sep 2026 | Direct | ||
| David Tsao | BLLN | Stock Option (right to buy) | Options Exercise | -0.6% | -3,333 | 556,667 | 24 Sep 2026 | Direct | ||
| Bosch John Roderick Ten | BLLN | Class A Common Stock | Sale | -5.99% | $169,920 | $120.00 | -1,416 | 22,219 | 24 Sep 2026 | Direct |
| Bosch John Roderick Ten | BLLN | Class A Common Stock | Sale | -5.65% | $150,960 | $106.61 | -1,416 | 23,635 | 21 Sep 2026 | Direct |
| Thomas P. Lynch | BLLN | Class A Common Stock | Sale | -98% | $3,873,966 | $110.33 | -35,112 | 700 | 17 Sep 2026 | Direct |
| Thomas P. Lynch | BLLN | Class A Common Stock | Options Exercise | 5016% | 35,112 | 35,812 | 17 Sep 2026 | Direct | ||
| Thomas P. Lynch | BLLN | Stock Option (right to buy) | Options Exercise | -89.6% | -35,112 | 4,063 | 17 Sep 2026 | Direct | ||
| Oguzhan Atay | BLLN | Class A Common Stock | Sale | -3.28% | $522,536 | $98.00 | -5,332 | 157,168 | 14 Sep 2026 | By spouse |
| Oguzhan Atay | BLLN | Class A Common Stock | Sale | -100% | $2,507,908 | $100.32 | -24,999 | 0 | 14 Sep 2026 | Direct |
| Oguzhan Atay | BLLN | Class A Common Stock | Options Exercise | 24,999 | 24,999 | 14 Sep 2026 | Direct | |||
| Oguzhan Atay | BLLN | Stock Option (right to buy) | Options Exercise | -4.74% | -24,999 | 501,962 | 14 Sep 2026 | Direct | ||
| Shan Riku Sakakibara | BLLN | Class A Common Stock | Gift | -1.75% | -3,500 | 196,500 | 10 Sep 2026 | Direct | ||
| Bosch John Roderick Ten | BLLN | Class A Common Stock | Sale | -5.35% | $138,117 | $97.54 | -1,416 | 25,051 | 09 Sep 2026 | Direct |
| David Tsao | BLLN | Class A Common Stock | Sale | -95.2% | $1,975,400 | $98.77 | -20,000 | 1,000 | 09 Sep 2026 | Direct |
| David Tsao | BLLN | Class A Common Stock | Options Exercise | 2000% | 20,000 | 21,000 | 09 Sep 2026 | Direct | ||
| David Tsao | BLLN | Stock Option (right to buy) | Options Exercise | -3.45% | -20,000 | 560,000 | 09 Sep 2026 | Direct | ||
| Oguzhan Atay | BLLN | Class A Common Stock | Gift | -100% | -20,000 | 0 | 09 Sep 2026 | Direct | ||
| Thomas P. Lynch | BLLN | Class A Common Stock | Sale | -96.6% | $1,999,880 | $99.99 | -20,000 | 700 | 08 Sep 2026 | Direct |
| Thomas P. Lynch | BLLN | Class A Common Stock | Options Exercise | 2857.1% | 20,000 | 20,700 | 08 Sep 2026 | Direct | ||
| Thomas P. Lynch | BLLN | Stock Option (right to buy) | Options Exercise | -70.6% | -20,000 | 8,337 | 08 Sep 2026 | Direct | ||
| Oguzhan Atay | BLLN | Class A Common Stock | Conversion of derivative security | 20,000 | 20,000 | 08 Sep 2026 | Direct | |||
| Oguzhan Atay | BLLN | Class B Common Stock | Conversion of derivative security | -0.9% | -20,000 | 2,197,542 | 08 Sep 2026 | Direct | ||
| David Tsao | BLLN | Class A Common Stock | Gift | -95.2% | -20,000 | 1,000 | 08 Sep 2026 | Direct | ||
| David Tsao | BLLN | Class A Common Stock | Conversion of derivative security | 2000% | 20,000 | 21,000 | 03 Sep 2026 | Direct | ||
| David Tsao | BLLN | Class B Common Stock | Conversion of derivative security | -0.86% | -20,000 | 2,305,108 | 03 Sep 2026 | Direct | ||
| Krishna Kittu Kolluri | BLLN | Class A Common Stock | Other | 78,244 | 57,839 | 26 Aug 2026 | See Footnote |
* marks a reported price that did not pass the local price check.