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
50/50
Latest evidence
26 Aug 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
-
50 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
-
26 Aug 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
50/50
Latest evidence
26 Aug 2026
13D/G
3/4/5
13F
Lead comparable stake: 20%
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%.
50 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 5
Humming Bird Ventures Management NV
20%
NeoTribe Ventures I, L.P.
11%
Oguzhan Atay
7.3%
David Tsao
6.9%
NeoTribe Associates I, L.P.
0.2%
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%
|
$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%
|
$422,218,059
4,359,505 shares
|
$0 | 07 Nov 2025 |
| Oguzhan Atay |
13D/G
3/4/5
Chairman and CEO, Director
|
7.3%
|
$310,584,488
3,206,861 shares
|
$0 | 31 Dec 2025 |
| David Tsao |
13D/G
3/4/5
Chief Technology Officer, Director
|
6.9%
|
$294,014,034
3,035,767 shares
|
$0 | 31 Dec 2025 |
| NeoTribe Associates I, L.P. |
3/4/5
10%+ Owner
|
0.2%
|
$6,896,356
87,362 shares
|
— | 09 Jun 2026 |
| Neotribe Ignite Fund I, L.P. |
3/4/5
10%+ Owner
|
0.2%
|
$6,896,356
87,362 shares
|
— | 09 Jun 2026 |
| Neotribe Ignite Partners I, LLC |
3/4/5
10%+ Owner
|
0.2%
|
$6,896,356
87,362 shares
|
— | 09 Jun 2026 |
| NeoTribe Partners I, LLC |
3/4/5
10%+ Owner
|
0.2%
|
$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: -$45,965,026.
Buys
$0
Insiders: 0
Sells
$45,965,026
Insiders: 6
Net
-$45,965,026
Shares: -402,895
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 402,895
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 309,096 | $0 | $36,502,576 | -$36,502,576 |
| 3-6 | 0 | 93,799 | $0 | $9,462,450 | -$9,462,450 |
| 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
-$45,965,027
Latest report
28 Sep 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% | Median | 10 Sep 2026 |
| Oguzhan Atay | Chairman and CEO, Director | $18,639,121 | -$22,953,776 | -55% | Filing P/S | 28 Sep 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 | $2,666,280 | -$1,722,893 | -39% | Filing P/S | 24 Sep 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 | $125,000 | -$8,863,648 | -99% | Filing P/S | 24 Sep 2026 |
| Thomas P. Lynch | General Counsel, Chief Compliance Officer and Secretary | $77,205 | -$5,873,846 | -99% | Filing P/S | 17 Sep 2026 |
| Humming Bird Ventures Management NV | 10%+ Owner | $0 | Mixed | 07 Nov 2025 | ||
| Ross Taylor | Chief Financial 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 | -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 | |||
| Krishna Kittu Kolluri | BLLN | Class A Common Stock | Other | -100% | -484,442 | 0 | 26 Aug 2026 | See Footnote | ||
| David Tsao | BLLN | Class A Common Stock | Sale | -90.9% | $1,000,000 | $100.00 | -10,000 | 1,000 | 25 Aug 2026 | Direct |
| David Tsao | BLLN | Class A Common Stock | Options Exercise | 1000% | 10,000 | 11,000 | 25 Aug 2026 | Direct | ||
| David Tsao | BLLN | Stock Option (right to buy) | Options Exercise | -1.69% | -10,000 | 580,000 | 25 Aug 2026 | Direct | ||
| Bosch John Roderick Ten | BLLN | Class A Common Stock | Sale | -5.08% | $141,700 | $100.00 | -1,417 | 26,467 | 25 Aug 2026 | Direct |
| Bosch John Roderick Ten | BLLN | Class A Common Stock | Sale | -4.84% | $131,583 | $92.86 | -1,417 | 27,884 | 10 Aug 2026 | Direct |
| David Tsao | BLLN | Class A Common Stock | Sale | -90.9% | $928,600 | $92.86 | -10,000 | 1,000 | 10 Aug 2026 | Direct |
| David Tsao | BLLN | Class A Common Stock | Options Exercise | 1000% | 10,000 | 11,000 | 10 Aug 2026 | Direct | ||
| David Tsao | BLLN | Stock Option (right to buy) | Options Exercise | -1.67% | -10,000 | 590,000 | 10 Aug 2026 | Direct | ||
| Oguzhan Atay | BLLN | Class A Common Stock | Sale | -100% | $2,331,352 | $150.03 | -15,539 | 0 | 05 Aug 2026 | Direct |
| Oguzhan Atay | BLLN | Class A Common Stock | Options Exercise | 15,539 | 15,539 | 05 Aug 2026 | Direct | |||
| Oguzhan Atay | BLLN | Stock Option (right to buy) | Options Exercise | -2.86% | -15,539 | 526,961 | 05 Aug 2026 | Direct | ||
| Oguzhan Atay | BLLN | Class A Common Stock | Sale | -7.14% | $1,717,125 | $137.37 | -12,500 | 162,500 | 03 Aug 2026 | By spouse |
| Oguzhan Atay | BLLN | Class A Common Stock | Sale | -100% | $4,450,835 | $136.95 | -32,500 | 0 | 03 Aug 2026 | Direct |
| Oguzhan Atay | BLLN | Class A Common Stock | Options Exercise | 32,500 | 32,500 | 03 Aug 2026 | Direct | |||
| Oguzhan Atay | BLLN | Stock Option (right to buy) | Options Exercise | -5.65% | -32,500 | 542,500 | 03 Aug 2026 | Direct | ||
| Shan Riku Sakakibara | BLLN | Class A Common Stock | Sale | -1.96% | $560,840 | $140.21 | -4,000 | 200,000 | 31 Jul 2026 | Direct |
| Nancy JoAnn Johnson | BLLN | Class A Common Stock | Sale | -67.3% | $1,821,628 | $128.29 | -14,199 | 6,900 | 16 Jul 2026 | Direct |
| Bosch John Roderick Ten | BLLN | Class A Common Stock | Sale | -12.7% | $533,330 | $125.46 | -4,251 | 29,301 | 13 Jul 2026 | Direct |
* marks a reported price that did not pass the local price check.