BillionToOne, Inc. has 4 Schedule 13D or 13G filings on record since 2026-01-20. 4 holders' latest filing reports 5% or more of class a common stock, par value $0.00001 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Hummingbird Ventures Management NV | 19.6% | 7,887,237 | SCHEDULE 13D, 2026-01-20 | 2025-11-06 |
| Krishna Kittu Kolluri ("Kolluri") | 10.6% | 4,359,505 | SCHEDULE 13G, 2026-02-13 | 2025-11-07 |
| Oguzhan Atay | 7.3% | 3,206,861 | SCHEDULE 13G, 2026-02-17 | 2025-12-31 |
| David Tsao | 6.9% | 3,035,767 | SCHEDULE 13G, 2026-02-17 | 2025-12-31 |
Purpose of Transaction (Item 4)
Hummingbird Ventures Management NV
The Shares reported herein as being beneficially owned by the Reporting Persons were acquired for investment purposes. The Reporting Persons acquired beneficial ownership of the shares as described in this Schedule 13D for investment purposes and intend to review their investment in the Issuer on a continuing basis. Depending on various factors, including but not limited to the Issuer's business, prospects, financial position and strategic direction, price levels of the shares, conditions in the securities markets, and general economic and industry conditions, each Reporting Person may in the future take such actions with respect to its investment in the Issuer as it deems appropriate, including changing its current intentions, with respect to any or all matters required to be disclosed in this Schedule 13D. Fiat Ileri is a director of the Issuer. Consistent with the Reporting Persons' investment purposes, the Reporting Persons may engage in communications with, without limitation, one or more shareholders of the Issuer, management of the Issuer or one or more members of the board of directors of the Issuer, and may make suggestions concerning the Issuer's operations, prospects, business and financial strategies, strategic direction and transactions, assets and liabilities, business and financing alternatives and such other matters as the Reporting Persons may deem relevant to their investment in the Issuer. The Reporting Persons expect that they will, from time to time, …The first part of Item 4 of the SCHEDULE 13D filed 2026-01-20; the filing has the rest
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2026-01-20 | Hummingbird Ventures Management NV | 19.6% | SCHEDULE 13D |
| 2026-02-13 | Krishna Kittu Kolluri ("Kolluri") | 10.6% | SCHEDULE 13G |
| 2026-02-17 | Oguzhan Atay | 7.3% | SCHEDULE 13G |
| 2026-02-17 | David Tsao | 6.9% | SCHEDULE 13G |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.