John Roderick ten Bosch is VP at BillionToOne, Inc. (BLLN). They have made 1 open-market trade across 1 company since 2025, most recently 2026-10-05.
CIK 0002087126
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
1 open-market purchase totalling $48K since 2025, never a sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| BLLN | 20,802 | $2.0M |
Shares reported on the most recent Form 4, priced at the 2026-10-07 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| BLLN | SELL · 10b5-1 | 2026-10-05 | 2026-10-07 | $105.15 | $149K | — | — | — |
| BLLN | SELL · 10b5-1 | 2026-09-24 | 2026-09-28 | $120.00 | $170K | -21.1% | — | — |
| BLLN | SELL · 10b5-1 | 2026-09-21 | 2026-09-23 | $106.61 | $151K | -3.9% | — | — |
| BLLN | SELL · 10b5-1 | 2026-09-09 | 2026-09-11 | $97.54 | $138K | +16.5% | -5.1% | — |
| BLLN | SELL · 10b5-1 | 2026-08-25 | 2026-08-27 | $100.00 | $142K | +3.5% | +27.4% | — |
| BLLN | SELL · 10b5-1 | 2026-08-10 | 2026-08-12 | $92.86 | $132K | -1.2% | +0.5% | — |
| BLLN | SELL · 10b5-1 | 2026-07-13 | 2026-07-15 | $125.46 | $178K | -0.5% | -27.3% | -26.5% |
| BLLN | SELL · 10b5-1 | 2026-06-29 | 2026-07-01 | $120.00 | $170K | +3.8% | +15.4% | -1.7% |
| BLLN | SELL · 10b5-1 | 2026-06-15 | 2026-06-17 | $101.47 | $144K | +19.2% | +29.5% | +3.0% |
| BLLN | BUY | 2025-11-07 | 2025-11-12 | $60.00 | $48K | +19.3% | +1.4% | -8.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.