BillionToOne, Inc.
Ownership
Ownership Structure
Who owns BillionToOne, Inc. (BLLN)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions.
Largest Shareholders
No ownership data is available for this stock yet.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| ten Bosch John Roderick | SVP of Laboratory Operations | 27,884 | 2,621,096 $ | Aug 10, 2026 | direct |
| Tsao David | Chief Technology Officer | 1,000 | 94,000 $ | Aug 10, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 10, 2026 | ten Bosch John Roderick | SVP of Laboratory Operations | Sell | 1,417 | 92.86 | 131,583 |
| Aug 10, 2026 | Tsao David | Chief Technology Officer | Sell | 10,000 | 92.86 | 928,600 |
| Aug 10, 2026 | Tsao David | Chief Technology Officer | Other | 10,000 | 2.80 | 28,000 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: August 13, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.