Karen Prange is President & VP at BOSTON SCIENTIFIC CORP (BSX). They have made 8 open-market trades across 3 companies since 2014, most recently 2026-08-05.
CIK 0001566083
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 $100K since 2022, against 7 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| HSIC | 62,902 | $5.6M |
| BSX | 38,395 | $1.8M |
| ATRC | 22,809 | $1.5M |
| EMBC | 64,581 | $421K |
| NVRO | 33,948 | $198K |
| CMD | 1,935 | $156K |
| OM | 29,334 | $131K |
| VRAY | 8,799 | $220 |
| Total | $9.7M |
Shares reported on the most recent Form 4, priced at the 2026-08-07 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 |
|---|---|---|---|---|---|---|---|---|
| ATRC | SELL | 2026-08-05 | 2026-08-07 | $38.80 | $138K | +15.4% | +30.2% | — |
| ATRC | SELL | 2026-05-20 | 2026-05-22 | $28.65 | $86K | -3.2% | +1.0% | +68.6% |
| ATRC | SELL | 2025-03-05 | 2025-03-07 | $38.12 | $465K | +3.0% | -6.5% | +3.2% |
| VRAY | SELL | 2023-07-19 | 2023-07-21 | $0.07 | $9K | N/A | N/A | N/A |
| ATRC | SELL | 2023-06-08 | 2023-06-12 | $47.89 | $34K | +1.1% | +9.9% | -9.0% |
| VRAY | BUY | 2022-05-10 | 2022-05-12 | $2.66 | $100K | -5.3% | -12.2% | +14.5% |
| BSX | SELL | 2016-03-08 | 2016-03-08 | $17.27 | $509K | +4.1% | +10.8% | +30.7% |
| BSX | SELL | 2016-02-08 | 2016-02-09 | $16.05 | $200K | +1.8% | +3.1% | +30.5% |
| BSX | SELL · 10b5-1 | 2015-07-07 | 2015-07-07 | $17.66 | $308K | -3.4% | -0.9% | -0.9% |
| BSX | SELL · 10b5-1 | 2015-03-03 | 2015-03-04 | $16.79 | $42K | -3.4% | -0.9% | -0.9% |
| BSX | SELL · 10b5-1 | 2015-02-27 | 2015-03-02 | $16.80 | $22K | -3.4% | -0.9% | -0.9% |
| BSX | SELL · 10b5-1 | 2014-12-10 | 2014-12-10 | $12.64 | $250K | -3.4% | -0.9% | -0.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.