Karen A. Foster is Chief Quality and Operations at BIOLIFE SOLUTIONS INC (BLFS). They have made 44 open-market trades across 1 company since 2020, most recently 2026-03-23.
CIK 0001683151
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 44 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| BLFS | 108,758 | $4.2M |
Shares reported on the most recent Form 4, priced at the 2026-03-31 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 |
|---|---|---|---|---|---|---|---|---|
| BLFS | SELL · 10b5-1 | 2026-03-23 | 2026-03-31 | $19.17 | $49K | +4.0% | +9.1% | +46.3% |
| BLFS | SELL | 2026-03-05 | 2026-03-09 | $20.15 | $2.0M | -1.5% | -0.6% | +31.5% |
| BLFS | SELL · 10b5-1 | 2026-03-03 | 2026-03-05 | $20.74 | $9K | -1.6% | -2.2% | +38.0% |
| BLFS | SELL · 10b5-1 | 2026-01-06 | 2026-01-08 | $25.59 | $9K | +2.4% | -9.3% | -21.0% |
| BLFS | SELL · 10b5-1 | 2025-12-09 | 2025-12-17 | $25.13 | $13K | -2.0% | -2.9% | -22.9% |
| BLFS | SELL · 10b5-1 | 2025-11-25 | 2025-11-28 | $26.74 | $11K | -5.1% | -3.8% | -13.9% |
| BLFS | SELL · 10b5-1 | 2025-10-09 | 2025-10-14 | $27.36 | $11K | +3.3% | -9.8% | -13.7% |
| BLFS | SELL · 10b5-1 | 2025-09-11 | 2025-09-15 | $26.83 | $14K | -6.1% | +11.7% | -4.2% |
| BLFS | SELL · 10b5-1 | 2025-08-26 | 2025-08-28 | $25.44 | $11K | +5.7% | -2.1% | +6.5% |
| BLFS | SELL · 10b5-1 | 2025-07-07 | 2025-07-09 | $22.27 | $9K | -7.0% | +1.6% | +17.8% |
| BLFS | SELL · 10b5-1 | 2025-06-10 | 2025-06-12 | $23.70 | $8K | -4.3% | -1.4% | +18.6% |
| BLFS | SELL · 10b5-1 | 2025-05-28 | 2025-05-30 | $22.46 | $6K | +9.9% | -0.3% | +15.4% |
| BLFS | SELL · 10b5-1 | 2025-04-09 | 2025-04-11 | $20.11 | $6K | +10.8% | +6.7% | +1.5% |
| BLFS | SELL · 10b5-1 | 2025-04-01 | 2025-04-03 | $22.66 | $357K | +4.8% | +13.0% | +6.3% |
| BLFS | SELL · 10b5-1 | 2025-03-11 | 2025-03-13 | $25.00 | $33K | +1.5% | -13.2% | -6.6% |
| BLFS | SELL · 10b5-1 | 2025-03-03 | 2025-03-05 | $25.46 | $8K | -0.9% | -20.2% | -18.2% |
| BLFS | SELL · 10b5-1 | 2025-02-12 | 2025-02-14 | $26.54 | $2K | -15.2% | -6.8% | -21.0% |
| BLFS | SELL · 10b5-1 | 2025-01-06 | 2025-01-08 | $27.02 | $9K | +1.2% | -3.9% | -24.0% |
| BLFS | SELL · 10b5-1 | 2024-11-26 | 2024-11-29 | $27.20 | $7K | -4.2% | -4.3% | -14.1% |
| BLFS | SELL · 10b5-1 | 2024-11-12 | 2024-11-14 | $26.34 | $2K | +23.8% | +25.2% | +20.5% |
| BLFS | SELL · 10b5-1 | 2024-10-30 | 2024-11-01 | $23.15 | $6K | +1.1% | +14.3% | +16.1% |
| BLFS | SELL · 10b5-1 | 2024-07-18 | 2024-09-18 | $24.16 | $15K | +2.6% | -3.2% | +10.1% |
| BLFS | SELL · 10b5-1 | 2024-05-29 | 2024-05-31 | $21.78 | $9K | +0.2% | -4.3% | +19.3% |
| BLFS | SELL · 10b5-1 | 2024-05-17 | 2024-05-21 | $22.18 | $2K | -1.3% | -3.3% | +22.7% |
| BLFS | SELL · 10b5-1 | 2024-04-18 | 2024-04-23 | $15.31 | $7K | +5.5% | +23.4% | +26.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.