Thomas S. Bremner is Director at BillionToOne, Inc. (BLLN). They have made 1 open-market trade across 1 company since 2025, most recently 2026-06-10.
CIK 0002087538
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 $2.5M since 2025, never a sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| BLLN | 11,350 | $1.1M |
Shares reported on the most recent Form 4, priced at the 2026-06-12 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 | BUY | 2025-11-07 | 2025-11-10 | $60.00 | $2.5M | -8.4% | -0.8% | -11.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.