Form
SCHEDULE 13D
Active or control-oriented beneficial ownership filing.
Humming Bird Ventures Management NV - 06 Nov 2025 SCHEDULE 13D Report for BillionToOne Class A common stock (BLLN)
- Filing manager
- Humming Bird Ventures Management NV
- Reporting owner
- Hummingbird Ventures Management NV
- Security
- BillionToOne Class A common stock
- Beneficially owned shares
- 7,887,237 shares
- Large-stake signal
-
Ownership
20%Beneficial ownership of this reported class.
Shares
7,887,237 sharesShares beneficially owned as disclosed.
Event date
06 Nov 2025Date tied to the ownership event or amendment.
Accepted by SEC
20 Jan 2026EDGAR acceptance date.
How to read this large-stake filing
- Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
- Compare this filing with the holder history and issuer page before treating the percentage as a current position.
- Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
- Class ownership
- 20%
- Symbol
- BLLN
- Shares outstanding
- 40,241,005 shares
- SEC form
- SCHEDULE 13D
- Accepted by SEC
- 20 Jan 2026, 19:46:53 UTC
- Event date
- 06 Nov 2025
- Source filing
- View source filing
Ownership signal
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Subject security
Names, identifiers, and filing context for this profile.
2 source fields
Source evidence
Original filing metadata and source links for verification.
4 source fields
Key filing fact
Humming Bird Ventures Management NV disclosed 20% ownership in BillionToOne Class A common stock (BLLN) on 06 Nov 2025.
Key facts
- Humming Bird Ventures Management NV filed SCHEDULE 13D for BillionToOne Class A common stock (BLLN).
- Disclosed ownership: 20%.
- Date of event: 06 Nov 2025.
Change
- No earlier schedule filing is available for direct comparison.
- Current filing was accepted on 20 Jan 2026, 19:46.
Research use
- This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
- Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.
Evidence
Backed by Schedule 13D/13G
View source filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting persons
Disclosed reporting parties (9)
Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.
| Name | Ownership | Shares owned | Sole voting power | Shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Hummingbird Ventures Management NV | 20% | 7,887,237 | 0 | 7,887,237 | /s/ Lukas Decoster | 49/9 CommV, represented by its permanent representative Lukas Decoster, Director | 0002099044 |
| Hummingbird Opportunity Fund II CommV | 6.6% | 2,631,664 | 0 | 2,631,664 | /s/ Firat Ileri | Hummingbird Ventures Management NV, its Manager; Firat Ileri, Permanent Representative | |
| Hummingbird Ventures III CommV | 6.4% | 2,580,833 | 0 | 2,580,833 | /s/ Firat Ileri | Hummingbird Ventures Management NV, its Manager; Firat Ileri, Permanent Representative | |
| Hummingbird Dragons CommV | 5% | 2,015,118 | 0 | 2,015,118 | /s/ Firat Ileri | Hummingbird Ventures Management NV, its Manager; Firat Ileri, Permanent Representative | |
| Hummingbird Collective CommV | 0.05% | 18,845 | 0 | 18,845 | /s/ Firat Ileri | Hummingbird Ventures Management NV, its Manager; Firat Ileri, Permanent Representative | |
| HB&Q NV | 1.6% | 640,727 | 0 | 640,727 | /s/ Firat Ileri | Hummingbird Ventures Management NV, its Manager; Firat Ileri, Permanent Representative | |
| Firat Ileri | 20% | 7,887,237 | 0 | 7,887,237 | /s/ Firat Ileri | Firat Ileri | 0002087908 |
| Barend Van den Brande | 20% | 7,887,237 | 0 | 7,887,237 | /s/ Barend Van den Brande | Barend Van den Brande | |
| Lukas Decoster | 20% | 7,887,237 | 0 | 7,887,237 | /s/ Lukas Decoster | Lukas Decoster |
CIK / CUSIP context first