Stephen Feider is CFO at Beta Bionics, Inc. (BBNX). They have made 6 open-market trades across 1 company since 2025, most recently 2026-09-02.
CIK 0002048588
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.
0 open-market purchases, against 6 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| BBNX | 159,378 | $2.6M |
Shares reported on the most recent Form 4, priced at the 2026-09-03 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 |
|---|---|---|---|---|---|---|---|---|
| BBNX | SELL | 2026-09-02 | 2026-09-03 | $19.11 | $128K | +11.8% | -4.9% | — |
| BBNX | SELL · 10b5-1 | 2026-06-26 | 2026-06-30 | $17.04 | $170K | +5.8% | -10.9% | +27.8% |
| BBNX | SELL | 2026-06-02 | 2026-06-03 | $12.61 | $84K | +16.9% | +35.8% | +54.8% |
| BBNX | SELL | 2026-03-02 | 2026-03-03 | $12.36 | $18K | -10.2% | -14.2% | +10.9% |
| BBNX | SELL · 10b5-1 | 2026-01-02 | 2026-01-05 | $29.53 | $591K | -39.6% | -52.1% | -66.2% |
| BBNX | SELL | 2025-12-02 | 2025-12-04 | $29.34 | $42K | -2.7% | -2.9% | -62.6% |
| BBNX | SELL · 10b5-1 | 2025-10-03 | 2025-10-07 | $21.62 | $190K | -9.0% | +13.8% | +34.4% |
| BBNX | SELL · 10b5-1 | 2025-10-01 | 2025-10-03 | $20.76 | $622K | -5.1% | +24.5% | +31.4% |
| BBNX | SELL · 10b5-1 | 2025-09-08 | 2025-09-09 | $21.13 | $209K | -9.3% | -10.2% | +14.4% |
| BBNX | SELL · 10b5-1 | 2025-09-05 | 2025-09-08 | $21.00 | $2K | +0.2% | -3.8% | +23.1% |
| BBNX | SELL | 2025-09-02 | 2025-09-04 | $18.86 | $28K | +16.6% | +9.9% | +52.2% |
| BBNX | SELL · 10b5-1 | 2025-08-22 | 2025-08-26 | $17.01 | $150K | +27.2% | +21.7% | +72.7% |
| BBNX | SELL · 10b5-1 | 2025-08-19 | 2025-08-20 | $17.03 | $190K | +24.2% | +46.7% | +77.1% |
| BBNX | SELL | 2025-06-02 | 2025-06-04 | $17.89 | $27K | +0.2% | -31.0% | -2.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.