John A. Bartholdson is Director & 10% Owner at Bioventus Inc. (BVS). They have made 8 open-market trades across 2 companies since 2023, most recently 2026-06-02.
CIK 0001382909
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.
6 open-market purchases totalling $12.5M since 2023, against 2 sales. Across 6 scored buys the stock is up 5.3% at ninety days, and 2.8 points ahead of the S&P over the same stretch.
6 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 33% | 67% | 33% |
| Avg Move | -7.3% | -0.5% | +5.3% |
| Alpha | -7.6% | -3.1% | +2.8% |
| Scored | 6 | 6 | 6 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| LINC | SELL | 2025-03-14 | 2025-03-17 | $14.82 | $539K | +6.5% | +14.5% | +51.9% |
| BVS | BUY | 2024-08-16 | 2024-08-20 | $8.55 | $1.1M | +15.4% | +33.1% | +29.2% |
| BVS | BUY | 2023-08-11 | 2023-08-15 | $4.64 | $604K | -30.9% | -38.7% | -25.9% |
| BVS | BUY | 2023-08-10 | 2023-08-14 | $4.47 | $1000K | -18.4% | -36.7% | -24.5% |
| BVS | BUY | 2023-06-14 | 2023-06-16 | $3.38 | $2.0M | -9.5% | +10.8% | -5.8% |
| LINC | SELL | 2023-06-12 | 2023-06-14 | $6.49 | $2.0M | +0.9% | -5.3% | +32.0% |
| BVS | BUY | 2023-06-12 | 2023-06-14 | $2.94 | $2.7M | -12.6% | +4.1% | -8.2% |
| BVS | BUY | 2023-05-19 | 2023-05-23 | $1.96 | $5.2M | +12.0% | +24.5% | +67.0% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.